DIY Tunable Dye Laser! (HD 60FPS re-encoded video) Les Lab 2020-09-06 | Episode #8.1Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryNote :This is a re-encoded HD 60FPS version of youtube.com/watch?v=q9zQ3_Kjxd8 Seemingly the video processor was dropping frames :-(This fixes an issues where the laser beams (being pulsed) were being missed, and makes for a more watchable video!In this video, I show a home made tunable dye laser, pumped by a home made Nitrogen Laser.Tuning of the Laser Dye: 7-hydroxy-4-methylcoumarin is demonstrated from violet to green!List of Laser Dyes: http://www.chem.ucla.edu/~craigim/pdfmanuals/catalogs/Lamdachrome-laser-dyes.pdf
DIY Raspberry Pi Spectrometer NEW SOFTWARE! Les Lab 2022-10-22 | Episode 45#spectroscope#spectrometer #raspberrypi Code at the end of the Description! Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video I demonstrate the latest and greatest software for the home-made Raspberry Pi Spectrometer with al new features! If you already have a Raspberry Pi, this useful tool can be built for under 100 bucks!The new software features:Accuracy has been significantly improved by implementing multi-wavelength calibration and a Polynomial regression data fit to compute wavelengths as precisely as possible across the measured range.Full screen spectrometer display! On Raspberry Pi systems, the interface is designed to fit 800 x 480 screens, which seem to be a common resolution for RPi LCD's, paving the way for the creation of a stand alone benchtop instrument. (for example the HyperPixel 4.0, etc)Waterfall display from measuring spectra changes over timeThis uses readily available components and easy to use Python software I have written specially for this application.A commercial Diffraction grating Spectroscope patonhawksley.com/product-page/benchtop-spectroscopeOriginal PySectrometer: youtu.be/T_goVwwxKE4Nitrogen Laser repair: youtu.be/0MvXXwAizrMHome made Dye Laser: youtu.be/-ny_-Y1MpRYUlbricht Sphere: youtu.be/BtMqx5P74n4All code for this video and the bill of materials, as well as additional information is available at my GitHub.github.com/leswright1977/PySpectrometer2#raspberrypi#optics#laser 0:00 Intro0:16 Hardware1:41 Software Repo Github2:33 New Features!6:20 Where to buy parts7:45 Quick test9:30 New Software Demo!9:49 Calibration14:38 Waterfall mode15:36 Test with a Dye Laser!18:19 Self contained unit with screen!19:16 Outro19:26 Channel supporter credits
Top 3 CO2 Laser upgrades: K40 CO2 Laser Rebuild Part 2 Les Lab 2022-09-18 | Episode #44#co2lasercutter #co2laser #minigerbilThis video is a followup detailing the repair and refurbishment of a Chinese K40 style 50W CO2 Laser cutter I picked up for just 60 bucks!In this video I show 3 must have upgrades for a Chinese CO2 Laser cutter, a new cutting head with air assist, a current meter, and a review of the Minigerbil 3 from Awesome.tech and its use with LightBurn softwareBuy the Mini Gerbil V3 from:https://awesome.tech/product/mg3-mini-gerbil-v3-2-axis-controller-for-k40-laser/The air assist head came from ebay(no affiliation) ebay.co.uk/itm/223452043473The milliameter is any suitable 0-30mA analog meter. Check your tube specifications for maximum allowable current.If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAlternatively, please share this content on your social media platforms, it really helps me out!0:00 Intro0:22 Refurbishment0:40 Air assist cutting head Upgrade1:30 Old controller (Leetro)2:14 Milliammeter Upgrade3:10 Internals gutted4:10 Mini Gerbil v3 controller board7:43 Blinkenlights8:17 LightBurn software8:47 Engraving and cutting job10:12 Complex cutting job12:55 Summary13:16 Outro13:25 Channel Supporter Credits
K40 CO2 Laser Rebuild Part 1 Les Lab 2022-08-14 | Episode #43#co2lasercutter #co2laser This video is the first in a short series detailing the repair and refurbishment of a Chinese K40 style 50W CO2 Laser cutter I picked up for just 60 bucks!Is it going to be worth it?What should I replace the controller with? A Mini Gerbil or a Cohesion3d?Should I convert the old tube to a flowing gas CO2 Laser? Comment down below!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAlternatively, please share this content on your social media platforms, it really helps me out!0:00 Intro0:10 Overview0:30 Broken CO2 Laser tube1:46 Overview of the CO2 Laser Cutting machine2:24 Electronics (PSU & Controllers)4:03 Laser bed5:49 Laser controller6:18 first light6:42 Test wood engraving7:08 Beam profiling the Laser8:45 50W CO2 Laser tube overview!10:08 Summary10:51 Outro11:00 Credits! Thanks to all who have supported this Channel!
xTool D1 Pro Review and first project Les Lab 2022-08-03 | Episode #42In this episode I review the xTool D1 Pro and demonstrate how to do your first mini project! I don't often do reviews, but my inbox was filling up with companies asking me to review these, so I had something of a choice. Was it a good one? Watch to find out!I personally am interested in engraving panels for my electronics projects.If there is interest in future engraving projects, please leave a comment below!Software link: xtool.com/pages/softwareReferral link: xtool.com/?ref=Lmz9rxv6&utm_source=influencerIf you want to buy one of these, please use these affiliate links:20W xTool D1 Pro: xtool.com/collections/machine/products/xtool-d1-pro-20w-higher-accuracy-diode-diy-laser-engraving-cutting-machine?ref=Lmz9rxv6&utm_source=influencer10W xTool D1 Pro: xtool.com/collections/machine/products/xtool-d1-pro-10w-higher-accuracy-diode-diy-laser-engraving-cutting-machine?ref=Lmz9rxv6&utm_source=influencer5W xTool D1 Pro: xtool.com/collections/machine/products/xtool-d1-pro-5w-higher-accuracy-diode-diy-laser-engraving-cutting-machine?ref=Lmz9rxv6&utm_source=influencer0:00 Intro0:21 Unboxing5:46 10 Watt Laser7:44 Software: xTool Creative Space8:40 A simple first project!12:09 Cutting and Engraving Wood!14:43 Engraving slate15:36 Summary16:05 Outro
CO2 Laser Engraver. Industrial Laser Coder Hacked! Part 2! Les Lab 2022-07-13 | Episode #41$2 for 1-4 layer PCBs ;PCB assembly from $0 : jlcpcb.com/DYE#linuxcnc#laserengraving #GCodeIn this video I have rebuilt a Domino D100+ Industrial Laser Coder/ marking head, and demonstrate some code to get it to do some engraving!This Laser uses the XY2-100 Protocol to drive the Galvos and modulate the Laser, so software and hardware is needed to get this to work.This Uses the awesome OpenGalvo OPAL library written by Daniel Olsson, and a PCB designed by me, to send standard Gcode which is then translated into XY2-100.This combination is suitable for driving other Galvo Scan heads such as the Sino-Galvo SG7110.F-engrave from the Linux CNC project is demonstrated to turn an image in to suitable G-Code for the machine.I engrave a few types of materials with it including Wood, Perspex and glass!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAlternatively, please share this content on your social media platforms, it really helps me out!Links!:Previous tear-down video: youtube.com/watch?v=_i1J7TGpPnQOpenGalvo (OPAL) Library:github.com/opengalvo/OPALReddit Thread:reddit.com/r/OpenGalvoDEMO Laser Marking - OpenGalvo - OPAL Firmware and Sino Galvo SG7110 Teensy 4.0 Slow: youtu.be/uMT-sZhYKJo Fast: youtu.be/m6PLiacBdwsPCB Gerber files:github.com/leswright1977/OPAL_PCB0:00 Intro0:09 Galvo XY2-100 Pinout (Sino Galvo)0:38 XY2-100 Protocol1:26 OpenGalvo OPAL Project4:54 Schematic and PCB Design6:44 Finished PCB7:33 Rebuilt CO2 Laser coder7:57 Engraver setup8:26 First light8:53 Convert image to G-Code (F-Engrave)10:33 Wood engraving10:58 Perspex engraving11:51 Glass engraving12:32 Will it Crash & Burn??13:41 Results14:25 Out!
Industrial CO2 Laser Coder TEARDOWN and repair! Part 1! Les Lab 2022-06-10 | Episode #40In this video I tear down a Domino D100+ Industrial Laser Coder!It has a high speed Galvo Scan head complete with all the amplifiers the drivers and Silicon mirrors, and beautiful Zinc Selenide (ZnSe) F-Theta lens. There is also a II-VI ZnSe Collimating lens and of course a 15W Synrad Carbon Dioxide Laser, with an unusual wavelength of 9.3 microns!Is it all scrap, or can it be brought to life? Watch till the end to find out!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAlternatively, please share this content on your social media platforms, it really helps me out!Helium Soak for Laser tubes:repairfaq.org/sam/laserhtr.htm#htrtrr1aSynrad Metal Laser tube Patent:patents.google.com/patent/US4805182A/enSynrad 48 Series User Manual (Includes Schematics!):https://isurplus.com.au/manuals/Synrad%2048%20Series%20User%20Manual.pdfXY2-100 Library for Teensy 3.2:github.com/Tuet/XY2_100OpenGalvo (OPAL) Library:github.com/opengalvo/OPALCO2 Laser Beam Expanders/Collimators:ii-vi.com/product/beam-expanders0:00 Intro0:08 Domino 100+ Laser Marking head Overview0:59 Harting Industrial Connector1:36 Laser Scan Head 2:39 ZnSe F-Theta Lens & Galvo's4:06 Galvo Driver / Amplifier Boards4:46 Laser Head Teardown Synrad CO2 Laser & Collimating Lens11:02 Synrad CO2 Laser teardown14:00 Helium Soak and Laser repair and mystery fault19:00 Laser scan head hacking XY2-10021:02 Summary of parts recovered and Collimating Lens
Burning Laser Diode Power Supply 10W and Laser Safety Les Lab 2022-05-11 | Episode #39$2 for 1-4 layer PCBs ;PCB assembly from $0 : jlcpcb.com/DYEI this episode I demonstrate a home made 10W Laser Diode Driver. As this is a Class 4 Laser, there is discussion on how to design, build and run such a Laser safely! Of course there is the inevitable burning and Smoke test, so watch until the end!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAlternatively, please share this content on your social media platforms, it really helps me out!Box Optronics Laser diodes: boxoptronics.comThorLabs Laser safety Glasses: thorlabs.com/newgrouppage9.cfm?objectgroup_ID=762Kentek Laser Safety eyewear: kenteklaserstore.com/products/eyewear/laser-safety-eyewearKentek Optical density Calculator: lasersafetyu.kentek.com/easy-haz-laser-hazard-software-basic-web-versionMPE Graphs: bangor.ac.uk/hss/inflink/lasercalculators.php.en0:00 Intro0:38 Laser diode Catalog1:15 Laser Diode Overview2:03 Laser Diode Datasheet2:59 Laser Diode Driver Schematic4:13 PCB Layout4:43 3D Model5:25 Power supply overview8:02 British Standards Safety of Laser Products9:33 Laser Safety Glasses12:50 Laser Demonstration and Smoke test#burninglaser#lasersafety
How to make a Triggered Spark Gap for High Voltage Lasers and Marx Generators Les Lab 2022-03-12 | Episode #38As "dougc314" and "what else is on" noted, at 10:40 there is an error in my Schematic! This should be a 2N3906 not a 2N3904.The RC differentiator (11:15, thanks "GermanMythbuster" for pointing that out!) is missing values on the Schematic The cap should be 22nf, and the resistor is 4k7.Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,share,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAlternatively, please share this content on your social media platforms, it really helps me out!In this video, a home-made Triggered Spark Gap is demonstrated, along with the power supply schematics.This was designed primarily for my nitrogen laser, but can be used in Marx Generators, Tesla coils, or anywhere you need high voltage triggered switch!Original Nitrogen Laser video: youtu.be/pCnXftuJ9ZoNitrogen Laser teardown: youtu.be/AyN1o_3XaTwLaser capacitors: youtu.be/8wUxYVe98Uo#triggeredsparkgap#highvoltage#Laser
Home Made Integrating or Ulbricht Sphere Les Lab 2022-02-05 | Episode #37Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,share,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video, a home-made Ulbricht or integrating sphere is explained and demonstrated!Papers Cited:A Mixture of Barium Sulfate and White Paint is a Low-Cost SubstituteReflectance Standard for Spectralonhttps://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1010&context=cpl_techniquesinstrumentsLow cost 3D-printing used in an undergraduate projectpure.aber.ac.uk/ws/files/9565512/Tomes_EJP_preprint.pdfUltrawhite BaSO4 Paints and Films for Remarkable Daytime Subambient Radiative Coolingpubs.acs.org/doi/10.1021/acsami.1c02368Nitrogen Laser Rebuild Videos:youtu.be/0MvXXwAizrMyoutu.be/ngs9zPdI_t0Dye Laser Teardown:youtu.be/ERNVgGmjALYRaspberry Pi Spectrometer Video:youtu.be/T_goVwwxKE4#Laser#Optics#NitrogenLaser#DyeLaser#UlbrichtSphere#IntegratingSphere
RGB Dye Laser? How Dye Lasers Work: Viewer Questions Les Lab 2021-12-17 | Episode #36Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,share,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryViewer questions!Some people had questions on Dye Lasers:Is it possible to mix Dyes in the same cuvette?jonsinger.org/jossresearch/tjiirrs/014.htmlHow is it that focusing a Nitrogen laser into a Line evern sets up lasing in the first place?#Laser#NitrogenLaser#DyeLaser#optics
Dumpster Nitrogen Laser Part 2 It Lives! Les Lab 2021-10-31 | Episode #35Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,share,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryI bought a couple of MNL-100 Nitrogen lasers that were listed as "Pulled form a working environment" but we ll know that means "Pulled from a Dumpster"!These are of course non working, and in very poor physical condition.This is the followup video on the rebuild. I describe the new controller, overclock the Laser, and drive some Dye Lasers with it!#Laser#OverclockedLaser#NitrogenLaser#DyeLaser#optics
Raspberry Pi Zero 2 W Spectrometer! Les Lab 2021-10-31 | Episode 34A short video on the newly released Pi Zero 2 W!Will it run my PySpectrometer software?For a good breakdown of the capabilities of the new Pi Zero W, see "Explaining Computers" video here: youtube.com/watch?v=Qxcyb5z2HDMCode at the end of the Description! Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryThis is a follow up video to Episode #20 where I built an inexpensive Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4For the Miniature Spectrometer see Episode #27: youtu.be/Tw3HJEhE2dIThis uses readily available components and easy to use Python software I have written specially for this application.All code for this video as well as additional information is available at my GitHub:github.com/leswright1977/PySpectrometer#RaspberryPiZero #PiZero2W#Spectrometer#optics
Hackaday Prize Entry 2021 Raspberry Pi Spectrometer #HackadayPrize Les Lab 2021-10-19 | #HackadayPrize Entry video#2021HackadayPrizeEpisode 33This is my entry for the 2021 Hackaday Prize, there is a lot of good competition out there, but I am pleased to have made it to the finals!For more information on this project, please visit:hackaday.io/project/181144-raspberry-pi-spectrometergithub.com/leswright1977Detailed video:youtube.com/watch?v=T_goVwwxKE4Software Update:youtube.com/watch?v=dm3woVQp8XcMiniature version:youtube.com/watch?v=Tw3HJEhE2dICheck out my other videos: youtube.com/leslaboratory
Can it be repaired? Dumpster Nitrogen Laser teardown Part 1 Les Lab 2021-10-02 | Episode #32Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,share,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryI bought a couple of MNL-100 Nitrogen lasers that were listed as "Pulled form a working environment" but we ll know that means "Pulled from a Dumpster"!These are of course non working, and in very poor physical condition, so I do a very in depth tear down on one, right down to the guts.Later I rebuild it, and hack on a good old fashioned Spark Gap switch to see if I can get some output.This will be a two part video. Later I will build my own control electronics, and graft in a triggered spark gap. Stay Tuned!https://www.ltb-berlin.de/en/products/lasers/mnl-100/Link to Manuals: http://www.ltb-berlin.de/en/company/downloads/Relevant patent:patentimages.storage.googleapis.com/a6/c7/da/0abd64a49c006f/US5875207.pdf***Video Contents***00:00 - Intro00:18 - Nitrogen Laser overview00:52 - Teardown01:57 - Control Board description05:54 - High Voltage Power Supply07:30 - Pre-Ionizer board08:45 - High Voltage IGBT switch13:39 - Laser Energy Sensor16:53 - Laser Tube23:33 - Preionizer powerd up24:28 - Oscilloscope Measurement26:14 - High voltage power supply hacked29:01 - Replacing the IGBT switch with a spark gap31:13 - First Light! Powering up the Laser!32:00 - Measurement of RF Noise32:35 - Further improvements for the Laser. Commercial spark gaps and control electronics.33:20 - Outro#Laser#Teardown#SparkGap#Dumpsterhack#electreonics#optics
Control Light with Sound! How to build a DIY AOTF AOM PCAOM controller! #Laser Les Lab 2021-09-06 | Episode #31In this episode I take a look at an Acousto-optic Tunable Filter!This device allows us to modulate or pick a wavelength from a multiline Laser using very high frequency sound waves, that are coupled into a crystal using a Piezoelecric transducer.Since this did not come with a controller, I show you how to build a controller for these devices for under 100 bucks, using an inexpensive Voltage controlled Oscillator (VCO) and an RF Amplifier!Wiki Article: en.wikipedia.org/wiki/Acousto-opticsData Sheet: https://www.laserland.de/tl_files/content/shop/show_equipment/Crystall/aa-aotf.pdfSchaefer-Bergmann diffraction pattern: ieeexplore.ieee.org/document/1076617?arnumber=1076617BOM:70-200MHz VCO RF Signal Source Voltage Controlled Oscillator Signal Generator :ebay.co.uk/itm/2542827627042MHZ-700MHZ 3W HF VHF UHF FM Transmitter RF Power Amplifier Module For Ham Radio:ebay.co.uk/itm/334032510798LM317 DC Linear Regulator module:ebay.co.uk/itm/254992672747...and a well stocked parts bin ;-)See also: youtube.com/watch?v=yoK4_UN7dA8#Laser #acoustooptics #optics
Bayer filter removal on a Pi Camera: Laser stripping, CFA removal, debayering, and UV conversion. Les Lab 2021-08-07 | Episode #30In this episode I discuss methods of stripping the Bayer Color Filter Array (CFA) from the Raspberry picamera, for use in my Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4I cover physical removal, chemical removal with EKC 830 and Laser stripping.I demo an experimental home made Laser stripping machine, like a miniature CNC, using the MNL-100 Nitrogen Laser I tore down and hacked here: youtu.be/k5MOAKHPVG8Does it work? Can you use the Picamera to image in the Ultraviolet? Watch the video to find out!References:Ultraviolet Imaging with Low Cost Smartphone Sensors: Development and Application of a Raspberry Pi-Based UV CameraThomas C. Wilkes , Andrew J. S. McGonigle , Tom D. Pering , Angus J. Taggart ,Benjamin S. White, Robert G. Bryant and Jon R. Willmott doi.org/10.3390/s16101649mdpi.com/1424-8220/16/10/1649/htmExcimer laser photoresist strippingMenachem Genut, Ofer Tehar-Zahav, Eli Iskevitch, Boris LivshitsProceedings Volume 2724, Advances in Resist Technology and Processing XIII; (1996) doi.org/10.1117/12.241858Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryMusic in this video:8-Bit March by Twin Musicom is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0Artist: http://www.twinmusicom.org#Laser#BayerFilter#RaspberryPi#electronics#optics
Yellow DPSS Laser with Analog Modulation for under $100!! Unboxing, Review & Measurement. Les Lab 2021-07-15 | Episode #29In this episode I unbox and review another sub $100 Yellow Laser, this time from Australia!Claimed specs are: 560nm (Yellow-Green) @ 15-20mWAnalog Modulation!I put it through it's paces, testing with the Raspberry Pi 4 Spectrometer, measure with a Coherent LaserCheck, and try out the modulation feature.These modules can be purchased from:LaserLandAustraliahttps://laserland.com.au/ info@laserlandaustralia.com+61 421 165 215Scanning Mirror: youtu.be/Em6pVB7z9lARaspberry Pi Spectrometer: youtu.be/T_goVwwxKE4Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory#YellowLaser#Laser#optics
Supermarket Barcode Scanner Teardown and hack! Les Lab 2021-07-03 | Episode #28In this episode, I tear down a supermarket checkout onmidirectional barcode scanner, talk about the optics and electronics, and discover an easter egg!Later in the video, I hack in a DPSS Laser, rebuild it and power it up, so keep watching until the end to see the barcode scanner from hell!Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory#Laser
How to build a MINIATURE Spectrometer for the Raspberry Pi Les Lab 2021-06-20 | Episode #27Code at the end of the Description! Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryThis is a follow up video to Episode #20 where I built an inexpensive Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4In answer to comments about miniaturizing this, I build a tiny lightweight Spectrometer, suitable for adding into smaller projects such as Tricorder projects, or maybe even mounting on a Drone.As an aside, I also look at the spectra from some Different lamps (as well as Ultraviolet) , including: Fluorescent, Mercury vapor,, Xenon, and Deuterium!The pocket spectroscope used in this build, was a kind donation from Paton Hawksey: patonhawksley.com/product-page/pocket-spectroscope.This uses readily available components and easy to use Python software I have written specially for this application.All code for this video as well as additional information is available at my GitHub:github.com/leswright1977/PySpectrometer#RaspberryPi#Spectrometer
Laser Barcode Scanner Teardown How to hack it into Laser Light Show! Les Lab 2021-06-15 | Episode #26Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like, subscribe and comment for more great content!In this video, I tear down a Metrologic Laser Barcode scanner that you might see used in supermarkets and warehouses.I talk about some of the components on the circuit board. I extract the scanner mirror and shine a 50mW 532nm Laser at it through smoke in a can, to give a simple, but really cool Liquid smoke effect, that looks awesome! Everybody loves Laser beams!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory
He-Ne Lasers! Green Laser, Yellow Laser, Red Laser & Dual Wavelength He-Ne Laser! Les Lab 2021-06-07 | Episode #25Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!In this video, I demonstrate colored Helium-Neon Lasers! The first 3 are manufactured by Lasos, with the following specs:A red Laser 632.8nm 11mWA Yellow/Amber Laser 594nm 2.2mWA Green Laser 543nm 1.16mWLater on, I force a vintage green Helium Neon Laser to generate 2 wavelengths simultaneously!The Yellow Laser was bought from Mike at mikeselectricstuff, check out his videos here: youtube.com/channel/UCcs0ZkP_as4PpHDhFcmCHyAThe Laser itself featured in this awesome video: youtube.com/watch?v=9urV1Gq7rBkIf you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory#laser#optics
Raspberry Pi Pico display fonts in MicroPython How to design fonts for your pi pico project Les Lab 2021-05-30 | Episode #24Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!In this video, how to create fonts in Python for the Raspberry Pi Pico Display from Pimoroni: shop.pimoroni.com/products/pico-display-packThis little display is way cool, but the font built into the firmware is not the best. This is an easy to use Python implementation of a 5x7 ASCII font and associated helper functions and includes a section on how to make custom fonts with a tool.(This is useful if you want to design your own fonts, just click the cells to toggle the pixels, and it spits out binary and hex data :-) Check it out!)All code is hosted at my Github and is free and open source: github.com/leswright1977/picofontIf you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory#raspberryPiPico#Python
Yellow DPSS Laser for under $100?! Unboxing, Review & Measurement with a Raspberry Pi Spectrometer Les Lab 2021-05-23 | Episode #23Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this episode I unbox and review a Yellow Laser from China!Alleged specs are: 574nm (Yellow) @ 8mWThanks to Mathias for the tip!I put it through it's paces, testing with the Raspberry Pi 4 Spectrometer, and measure with a Coherent LaserCheckIs it for real, or is it Junk? Watch to the end and find out!lasence.en.alibaba.com#laser#optics
How to measure Dye Laser Tuning curves with a DIY Raspberry Pi Spectrometer. Les Lab 2021-05-16 | Episode #22Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video I demonstrate how to measure the tuning curves of a Home Made Dye Laser with my DIY Raspberry Pi Spectrometer! I Use 4 Dyes: Coumarin-1, Sodium Fluorescein, Rhodamine 6G.See the PySpectrometer build at: youtu.be/T_goVwwxKE4Code and BOM for the Raspberry Pi 4 Spectrometer: github.com/leswright1977/PySpectrometerCheck out the Dye Laser video here, with some fantastic beam shots!: youtu.be/-ny_-Y1MpRYThe Optical Breadboard was purchased from: thorlabs.com/thorproduct.cfm?partnumber=MB3045/M#laser#thorlabs#optics#optical breadboard
How to build a DIY Raspberry Pi Spectrometer. Part 2, Software update and discussion on code Les Lab 2021-05-03 | Episode #21Code at the end of the Description! Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryFollowing on from the previous video, and the comments, Version 3 is now released. It has Peak hold added for pulsed applications, and can now export CSV dataAll code for this video and the bill of materials, as well as additional information is available at my GitHub:github.com/leswright1977/PySpectrometer#optics#python#raspberrypi
How to build a DIY Raspberry Pi Spectrometer using a Picamera and Spectroscope. Les Lab 2021-04-17 | Episode #20Code at the end of the Description! Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video I demonstrate a home-made Raspberry Pi Spectrometer for measuring the wavelength of light! If you already have a Raspberry Pi, this useful tool can be built for under 100 bucks!This uses readily available components and easy to use Python software I have written specially for this application.All code for this video and the bill of materials, as well as additional information is available at my GitHub:github.com/leswright1977/PySpectrometer#raspberrypi#optics#laser
Pulsed Laser Power measurement with Energy Sensors! Les Lab 2021-03-14 | Episode #19CODE at the end of the Description! Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like and subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryTime for some Science! In this video, I measure the power output of my home made Nitrogen Lasers using Gentec Pyroelectric Energy Sensors!Spoiler alert, I debut my largest home made TEA Nitrogen in this episode as well. What is its peak power? Watch the video to find out!Gentec Catalog with how to perform measurements (page 13) : gentec-eo.com/Content/downloads/complete-catalogue/Gentec-EO_Catalogue_2014_V2.0.pdfGentec Catalog ED-100 (Page 32) : http://www.tsukasa-tec.co.jp/product/measure/documents/catalog_000.pdfThe code for the Laser energy Calculator is at: github.com/leswright1977/Nitrogen_Laser_Energy_Calculator#laser#optics
Wire Ended to Doorknob Capacitor Modification (Inexpensive Nitrogen Laser Capacitors! (Part 2)) Les Lab 2021-02-13 | Episode #18Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryThis is a quick follow up video to "Inexpensive Nitrogen Laser Capacitors!"I convert wire ended capacitors to Doorknob Capacitors and try them in the Nitrogen Laser.Thanks for the suggestions from the previous video!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory
Hacking a Laser! MNL-100 Nitrogen Laser RS-232 Fibre Optic Interface Hack! Les Lab 2021-01-13 | Episode #17Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryA look inside an Industrial/Commercial Lasertechnik MNL-100 Nitrogen Laser! This is a beautiful piece of Laser engineering, and uses solid state switches as opposed to spark gaps or thyratrons!I hack up a fibre optic RS-232 interface and use the manufacturers software to control it.I also use a made Fibre coupling lens assembly and pump a home made Dye Laser with it.This particular version is rated at 140uJ (51 kW peak power) at 24Hzhttps://www.ltb-berlin.de/en/products/lasers/mnl-100/Link to Manuals: http://www.ltb-berlin.de/en/company/downloads/Direct link to the Marathon Software: http://www.ltb-berlin.de//assets/uploads/marathon-software.zipRelevant patent:patentimages.storage.googleapis.com/a6/c7/da/0abd64a49c006f/US5875207.pdf#optics#laser
How to make Inexpensive Nitrogen Laser Capacitors! Les Lab 2020-12-22 | Episode #16Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn response to questions for viewers, I substitute the expensive Doorknob Capacitor in one of my Nitrogen Lasers with inexpensive wire ended capacitors. Will it work? Watch the video to find out!
Mini Oscilloscopes: Tektronix 222A & Vintage GEC Miniscope! Les Lab 2020-11-21 | Episode #15Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video we take a look at two miniature CRT Oscilloscopes!Tektronix 222A quick overview of features and a battery mod.GEC Miniscope circa 1947, still working after 70+ years! With a short tear-down.
How to build a DIY Helium Neon laser power supply Les Lab 2020-11-03 | Episode #14Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryDIY home made quick and dirty Helium Neon laser power supply!A quick and dirty power supply for a Helium Neon laser, made from a ZVS driver, and an old monitor Flyback Transformer.With 15v input at 2 amps, this will provide on off load voltage of ~6kV (enough to strike the tube) and when the tube is struck this drops to 2500v at 6mAhttps://www.utwente.nl/en/tnw/slt/documentation/Equipment/Lasers/helium_neonlaserheads_1100s.pdf#electronics#highvoltage#laser
Yellow Laser Hacked! DPSS Melles Griot 85-YCA-050-711 561nm Les Lab 2020-10-17 | Episode #13 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryTear-down, hack and power up of a Yellow (or is it Green?) DPSS Laser.Melles Griot 85-YCA-050-711 561nm#yellowlaser#optics#laser
Argon Ion Laser Demonstration Multi-Line Les Lab 2020-10-04 | Episode #12Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryI was going to do another Nitrogen Laser video, as I have spent the week finishing off a bigger and better one, but I have just run out of Nitrogen!In this video I demonstrate an aged Spectra Physics Mutiline Argon Ion Laser.This thing is well past its serviceable life and can be hard to start, but can still put out over 50mW of multiline goodness.Argon Laser Schematics can be obtained here: http://repairfaq.cis.upenn.edu/Misc/laserasc.htm
Dye Laser Teardown and Demonstration Les Lab 2020-09-23 | Episode #11Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video, I show a Commercial Dye Laser, the LSI DCM laser I picked up from eBay. This is pumped by my now refurbished LSI 337i Nitrogen Laser.Dye Lasers are really col devices that produce laser light from the Ultraviolet - visible - the Infra-red. The re tunable as well!A Link to the Dye Laser manual is here:http://web.mit.edu/8.13/8.13d/manuals/spectra-physics/laser-science-inc-vsl-337-pulsed-nitrogen-laser.pdf which has some (but not all details) for this particular Dye Laser.#laser#optics
Home Made 30 kV ZVS High Voltage Power Supply and Tear-down Les Lab 2020-09-14 | Episode #10 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryDisclaimer: This video describes a high voltage power supply. Electricity can kill. Do not attempt to duplicate what you see here, unless you are qualified, or suitably experienced. I will not be held liable for injury, death or damage to property if you don't know what you are doing!This video covers the High voltage Power supply I use to power my Nitrogen Lasers!This supply is capable of generating 30,000v (more with some improvement) and uses a ZVS driver at it's core.It is current limited so will tolerate shorting and by varying the input voltage, you can vary the output (within limits).
Tektronix 2232 Analog / Digital DSO Oscilloscope Auction Score & Easter Egg! Les Lab 2020-09-07 | Episode #9 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryThis is a quick tour of a Tektronix 2232 Oscilloscope I won at Auction for 100 bucks delivered! It included the front cover, pouch, manual and a set of probes, including a nice current probe.Later in the video, I show an Easter Egg on this scope, Tek Logo and Tek Wizard, using the hidden menu!
DIY Tunable Dye Laser! Les Lab 2020-09-05 | Episode #8 There is a better HD 60FPS version of this video here: youtube.com/watch?v=-ny_-Y1MpRYCheck out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video, I show a home made tunable dye laser, pumped by a home made Nitrogen Laser.Tuning of the Laser Dye: 7-hydroxy-4-methylcoumarin is demonstrated from violet to green!List of Laser Dyes: http://www.chem.ucla.edu/~craigim/pdfmanuals/catalogs/Lamdachrome-laser-dyes.pdf
How to drive a Vacuum Fluorescent display with a Raspberry Pi: Raspberry Pi VFD Clock Les Lab 2020-08-23 | Episode #7 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryThe BA63 display is the kind of display you are familiar with a supermarket checkouts and can be had quite cheaply off of eBay.In this video, I hack a BA63 Vacuum Fluorescent display to be driven directly by a Raspberry Pi Zero W using a bit of Python. I show how to connect these up and go through show you the process of pulling my python code off github and explain how the scripts work.I have produced a number of sample Python scripts to drive these displays that do things such as: Display TextClock that displays time, date and Unix time.Scroll text (various types)Larson scannerClock that displays time, date, and Unix time.The possibilities are endless.All the code:github.com/leswright1977/RPi-BA63BA63 Manualdieboldnixdorf.com/-/media/diebold/ag-downloads/poslotterysystems/manuals/peripherals/baxx/ba63_display_operating_manual_english.pdfTEMIC TSC80C31-16CBalldatasheet.com/datasheet-pdf/pdf/29664/TEMIC/TSC80C31-16CB.html
Tear down of the DIY High Performance TEA Nitrogen Laser, how to build it and advice! Les Lab 2020-08-11 | Episode #6Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryAs some of you guys have asked specific questions about the High Performance Nitrogen Laser build, this followup video shows a tear-down of the Nitrogen Laser head, along with specifications for components and general advice if you want to build your own!Also someone asked if the whole system could be run on plain air, and this is demonstrated
DIY Home made High Performance TEA Nitrogen Laser and Dye Laser! Les Lab 2020-08-06 | Episode #5 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryIn this video, I show three of my high performance designs for Home made TEA nitrogen Lasers.Although Nitrogen Lasers are quite simple to build, they are difficult to build well. My first ever TEA Laser was held together with gravity and glue. The ones demonstrated here are worlds away from those first attempts!The two Charge Transfer Lasers demonstrated, have high repetition rates, high output powers (peak and average) and are robust, with many thousands of shots possible before the dielectric has to be replaced.These can easily drive a Dye Laser to threshold, in fact the peak power is so high, Dyes can be Lased Superradiantly (Feedback is so high, no mirrors are needed!)
Nitrogen Laser tear down, power up, and Home Made Dye Laser Demonstration Les Lab 2020-07-04 | Episode #4 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryApologies for the low volume. I will boost the audio next time!A tear down of an LSI Nitrogen Laser:36kW Peak Power150uJ4 ns 3mW average power @ 20HzThis laser is re-assembled, then used to pump a small home-made Dye Laser.Nitrogen Laser manuals are here:http://www.337nm.com/Literature_VSL337_NitrogenLaser_LaserInnovations.htmLambdachrome Dyes Datasheet is here:http://www.chem.ucla.edu/~craigim/pdfmanuals/catalogs/Lamdachrome-laser-dyes.pdf
Piano duet with a simple robot! Les Lab 2020-05-24 | Raspberry Pi zero and a single Servo driven by pin 18 plays C2 on a keyboard, leaving 2 hands to play the melody!Hardware is a Raspberry pi zero, and a single SG90 mini servo.A 'finger' was made from Perspex lined with silicone rubber so it does not damage my Keys!A more powerful servo would yield better results.Python code is below This is just slightly modified from the adafruit example here: learn.adafruit.com/adafruits-raspberry-pi-lesson-8-using-a-servo-motor# Servo Controlimport timeimport wiringpi# use 'GPIO naming'wiringpi.wiringPiSetupGpio()# set #18 to be a PWM outputwiringpi.pinMode(18, wiringpi.GPIO.PWM_OUTPUT)# set the PWM mode to milliseconds stypewiringpi.pwmSetMode(wiringpi.GPIO.PWM_MODE_MS)# divide down clockwiringpi.pwmSetClock(192)wiringpi.pwmSetRange(2000)delay_period = 0.095while True: wiringpi.pwmWrite(18, 90) time.sleep(delay_period) wiringpi.pwmWrite(18, 145) time.sleep(delay_period)
Raspberry Pi 4 (RPi4) & Google Coral Live object detection using MobileNet-SSD 70FPS! Les Lab 2019-07-04 | Episode #3 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory**Code below! Expand the description!**The Raspberry Pi 4 can be made to work with the Google Coral for a killer AI combination! This combo an easily give your AI or robotics project the edge when it comes to object detection and machine learning! This video discusses the installation script for Google Coral software on the RPi4 and also demonstrates two Live object detection scripts using MobileNet-SSD.Amazing framerates and detection speed is possible with this combination!The modified installation script and the two Object detection script are available at my GitHub:github.com/leswright1977/RPi4-Google-CoralPlease don't forget to like and subscribe if you want to see more content and star my GitHub if you find my code useful!
Raspberry Pi 4 Google Coral Les Lab 2019-07-02 | Another short screen cap!Got my Google Coral this morning and tried it on the Raspberry Pi 4. And the script failed with "Need To Be Root".As with the Intel Neural Compute stick, the installer needs some fixes.After a little bit of digging around at how everything works, I have edited the installation script that comes with the Coral, and now everything works just fine!I have uploaded a new install script, along with a description of the fixes here:github.com/leswright1977/RPi4-Google-CoralThe Coral works impressively well with the Raspberry Pi 4! The Device seems as fast if not faster that Intel's offering (I have not bench-marked it). What I can say for certain is that the documentation for the Coral is excellent, easier to use than the NCS2, and there is even documentation on how to retrain models.
Raspberry pi 4 Image recognition OpenVINO OpenCV NCS2 Les Lab 2019-06-29 | A quick video showing image recognition on the Raspberry pi 4!Sorry no audio! Also sorry about the video, it was done on a screen recorder over VNC!I will fix these issues for future videos!But you can go check out the code and description here.Currently it runs with 40 fps video,around 32 fps inferencing, and a detection rate of around 100 per second on a single NCS2!This is plenty to do some sensible video image recognition.I am sure with 2 sticks this thing will really sing. No more USB2 bottlenecks!Hats of to Eben and all the folks at the Pi foundation for their new board!About OpenVINO:Intel do not appear to have released updated code yet for the RPi4, and the current code won't run on Raspbian 10 Buster without some modifications. I have detailed these here:github.com/leswright1977/RPI4_NCS2In short, it is a very ugly hack, but it will do for me for now and it is easy to implement, without days of compiling...
Beer Bottle Following Robot part 3 Les Lab 2019-01-18 | Episode #2Just playing about with the robot.Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory
Beer bottle following robot part 2 Les Lab 2019-01-18 | Episode #1Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryThe Beer bottle following robot part two!Updates include moving motor control to a separate process, increasing 'snappiness'Introduction of a 'hunt' mode, where if the target moves out of view, the robot does a sweep of the room for it.Code is hosted on GitHub: github.com/leswright1977/RPi3_NCS2Hardware:I have no affiliation with any of the online shops that I list, but I generally select what I consider to be quality tools and materials to work with:Raspberry Pi 3B+, SD-Card, Pi-Cam: shop.pimoroni.comNeural Compute Stick 2: mouser.co.ukDuracell Power Bank (to run the Pi) : argos.co.uk/product/7377499Robot Chassis: dfrobot.comHeat-sink (install camera cable first!!!): amazon.co.uk/dp/B07GBV3D31/ref=pe_3187911_185740111_TE_itemIf you want more info on the things in the video, leave a comment below :EDIT: Since SWAYAM MITTAL asked. I used a L298N H bridge driver to drive the motors. They are cheap and easy to use. Just search for L298N on eBay, Amazon or Google
Beer bottle following robot Les Lab 2019-01-17 | Episode #0 Check out my other videos: youtube.com/leslaboratoryPlease don't forget to like,subscribe and comment for more great content!If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryRaspberry Pi3 and Intel neural compute stick 2.This runs in Python using OpenCV using the Mobilenet-SSD model.Code will appear on github shortly once I have done something more sensible with the steering algorithm.See part 2 for more refined version: youtube.com/watch?v=YYW4xARiQ7UCode is hosted on GitHub: github.com/leswright1977/RPi3_NCS2Hardware:I have no affiliation with any of the online shops that I list, but I generally select what I consider to be quality tools and materials to work with:Raspberry Pi 3B+, SD-Card, Pi-Cam: shop.pimoroni.comNeural Compute Stick 2: mouser.co.ukDuracell Power Bank (to run the Pi) : argos.co.uk/product/7377499Robot Chassis: dfrobot.comHeat-sink (install camera cable first!!!): https://www.amazon.co.uk/dp/B07GBV3D3...If you want more info on the things in the video, leave a comment below :
