Using The $25 DSO138 Oscilloscope - Joule Thief & Freq Generator (4K) tsbrownie 2022-06-19 | Putting this low cost portable o-scope to use and testing it from high frequency (500 KHz) to low frequency (1 Hz). Let's see how it performs.Video of the walk about of this o-scope:youtu.be/I5jvzTOeHKcI wish I had this when I was learning electronics in high school. Personal Observations: Its upper limit is 500KHz, but is better starting at 400KHz down. It is not automatic, you have to be close with the timing before it syncs and gives good detail data.==========================================================INFO I HAVE SCRAPED TOGETHER. Supplied "as is". You take all the risks for how you use it!OPERATIONS:[SEL] button: Selects parameter to change. Selected parameter will be highlighted blue. Press on [+] or [-] button to change parameters options. Press & hold SEL to save settings.[OK] button. Quick press: Run / Stop. Long press: detail measure on/off.[CPL] switch: Sets coupling to GND, AC, DC. If GND, scope input is isolated from input and connected to ground (0V input).[SEN1] & [SEN2] switch: Adjusts sensitivity. The [SEN1] X [SEN2] = actual sensitivity. Displayed at panel lower-left corner.[RESET] button: Resets system & reboots the oscilloscope.TRIGGERS / MODES[AUTO] MODE: Is the same as Normal mode, except it forces the oscilloscope to trigger if the trigger conditions are not met.[NORMAL] MODE: Displays a waveform when the trigger conditions are met, otherwise the oscilloscope does not trigger and the display remains unchanged. Normal and single modes are useful for capturing sparse or single waveform.[SINGLE] MODE: Is the same as normal mode except that oscilloscope will enter HOLD state after a trigger has been detected and waveform display has been updated.TURN ON/OFF MEASUREMENT DETAIL: Press [OK] button for about 2 seconds. WAVEFORM SAVE/RECALL: a) Press [SEL] & [+] simultaneously: Save displayed waveform to non-volatile memory.b) Press [SEL] & [-] simultaneously: Recall saved waveform.0V LINE ALIGNMENTIf the 0V line (the trace corresponding to 0V input voltage) does not match the VPOS indicator at the screen left border, it can be fixed by performing the “0V line alignment” function. 1. Set the [CPL] switch to GND position. Then press [SEL] button until VPOS indicator is highlighted and hold down [OK] button for about 2 seconds. The trace with be aligned to VPOS indicator when you release the [OK] button. It is normal for some residue mismatch to remain at the highest sensitivity settings.PROBE CALIBRATIONProblems may need calibrating for more accurate results at high frequencies. 1. Connect the clip to the test signal terminal and leave the black clip (ground) disconnected.2. Set [SEN1] switch to 0.1V and [SEN2] switch to X5. Set [CPL] switch to AC or DC.3. Adjust time base to 0.2ms. You should see a square waveform. If traces are not stable adjusttrigger level (the pink triangle on right screen border) until it is stable.4. Turn C4 (capacitor trimmer) with a small screw driver so that the waveform displays sharp right angle.5. Set [SEN1] switch to 1V and [SEN2] switch to X1. Keep all other settings unchanged. Adjust C6 until a sharp right angle waveform is displayed.TEST MODE: Is used to find possible opens (for all port pins) and shorts (for pins PB0 - 15, PC13-15). It first checks PB and PC pins with special patterns to find possible shorts. LED will blink fast if found. Otherwise, it will generate 3.3V and 0V alternatively at each port pins (PA, PB, PC, PD) at about 4 seconds. These signals can be used to check for opens.How to use: Hold down SW4 and press RESET to enter Test Mode.If LED is blinking fast that means there are shorts on PB or PC pins.Find out the shorts before continuing.If LED is blinking slowly, use a volt-meter to check each pin related connections that are suspected open. If there is no voltage change at a point which should be connected to a port ppin there may be open between the point and port pin.
Bangkok 360 from Samut Prakan Learning Park & Tower (4K) tsbrownie 2022-12-02 | LOCATION: Samut Prakan Learning Park and TowerPak Nam, Mueang Samut Prakan District, Samut Prakan 10270 (Bangkok) ThailandBTS Station: Pak Nam (Tower is easily visible from the station, 550 meters away)THINGS TO DO: Tower view of Bangkok!Dinosaur park (life size and very good)ExhibitionsLocomotiv Fabrik Krauss Cie, München & Linz MRC 2 No. 5012 Mfg 1903 0-4-2
1903 Krauss Steam Locomotive MRC2, No. 5012, 0-4-2 (4K) tsbrownie 2022-12-01 | This is a very small steam train that ran local routes in Thailand in the early 1900s.LOCATION: Samut Prakan Learning Park and TowerPak Nam, Mueang Samut Prakan District, Samut Prakan 10270 (Bangkok) ThailandBTS Station: Pak Nam (Tower is easily visible from the station, 550 meters away)Locomotiv Fabrik Krauss Cie, München & LinzMRC 2 No. 5012Mfg 1903Wheel Arrangement: 0-4-2Max Speed: 45 kmMax Steam Pressure: 12 AtmWeight On Each Coupling Axle In Empty: 4400 Kg.Weight On Each Coupling Axle In Full: 5700 Kg.Weight On Each Trailing Axle In Empty: 3100 Kg.Weight On Each Trailing Axle In Full: 4600 Kg.Per “The Railways of Thailand” by R. Ramer, this train was imported for use on the eastern section of the Maeklong Railway between Bangkok and Samut Sakhon. It was operated by Thaichin Railway Co (TRC). The western section was operated by the Maeklong Railway Co. (MRC) and ran between Samut Sakhon and Samut Songkhram. Retrieved from the Bangkok Transport Museum in December 1975.It is part of a family of Krauss trains. This is MRC 5, built 1906:youtu.be/4kpUqzWTo0Q
Antique Laptop PCMCIA Cards (4K) tsbrownie 2022-11-29 | Back in the bad old days of computers, before laptops had built in wifi, ethernet, bluetooth, there was the PCMCIA slot. In it you could use 1 device: modem, ethernet, wifi, or other. They were expensive, inconvenient, and added to the bulk of stuff in your laptop carry bag.
Salvaging Circuit Boards + Rare Find (4K) tsbrownie 2022-11-25 | Another salvaging video, but this board has some parts I don't see very often and nice additions to my bread-boarding parts.
AC / Heat Pump - Remote Control Holder Upgrade (4K) tsbrownie 2022-11-20 | Wall mounted remote controls come with 2 problems: 1) fingerprinted walls, and 2) they can be hard to grab resulting in a dropped/broken remote. This is a cheap, DIY modification to your remote control holders that will help alleviate both of these problems. MATERIALS- Block of wood, plastic, metal... that is roughly the size the the remote control holder's mounting surface.
Hantek DSO 4254C ASMR(?) Screen Peel tsbrownie 2022-11-11 | Screen peel of a new Hantek DSO 4245, 4 probe oscilloscope. I filtered out most of the fan noise (it's not a quiet unit!)
Dont Lose That Bluetooth Remote. DIY/Cheap Fix. (4K) tsbrownie 2022-11-07 | I have a blue tooth remote that keeps falling out of its assigned place on a tripod leg. The design was not great. Here's my mod/hack/improvement so I don't lose it.MATERIALS- CD / DVD drive magnets- Epoxy
FIXED-Mysterious Ceiling Fan Noise tsbrownie 2022-11-05 | Ceiling fan noise? This is one of the first things to check, because it's easy!I was sure the wiring / speed regulation module was vibrating inside the ceiling fan housing, but my son found it was the bulbs reaching resonant frequency with the normal fan vibrations. The sound started after we switched from glass florescent bulbs to plastic LED bulbs. The change in mass caused the lights to vibrate at a different frequency producing the annoying sound. WARNING: Fan blades in the video produce a flashing light effect. Do not watch if you are sensitive to flashing lights. WARNING: Video depicts working with moving fan. This IS NOT SAFE. DO NOT DO THIS unless you are trained and experience in working around moving machinery.
What To Do With These Ringlights? (4K) tsbrownie 2022-11-04 | Bought 2 cheap ringlights, and let me show you how the (don't) work for photography, but maybe you have some other ideas???NOTICE: The lights flash a few times during the video. Do not watch if you have photo-sensitivities to such things. First: Poluz 4.7 inch 12 cm Dimmable LED Ring Live Fill LightSecond: Meike LED Macro Ring Flash FC 100
Killer Work Surface - Literally! (4K) tsbrownie 2022-10-16 | Different types of work surfaces have their pluses and minuses. One almost killed me! Let's talk about it. NOTE: This is not all inclusive. If you are working with high voltages, dangerous chemicals, high temperatures, etc. you need to check the type of work surface to ensure it is safe for your needs!
No-Toroid Joule Thief Operating Frequency (4K) tsbrownie 2022-09-17 | What is the operating frequency of a no-toroid joule thief? The typical joule thief resonates around 12kHz to 26kHz. Let's find out.This is a flyback oscillator which allows a 1.5v LED to be lit by a dying / dead 1.5 volt battery. Most use a toroid coil which is bigger and likely will waste more power than the SMD inductors. This is the original one: Joule Thief, No Toroid Coil - How to Build youtu.be/g2jMrNFV4nQ=======================================================20220917: Update - By running the power input through my digital voltmeter while measuring milliamps, the SMD joule thief acted like any other JT working from 0.2v to 1.0 volts! It seems it is not oscillating stably. My guess is that my original SMD JT had 2 different inductors where this one has both the same, hence it does not auto resonate easily.Toroid JT1v == 27mA0.7v == 13 to 15 mA (not stable)0.5v == 5.5mASMD JT ver 2.0 with power via the digital volt meter1v == 24 mA0.8v == 13mA0.7v == 8.2 mA0.5v == 1.45 mA0.2v == 0.58 mA20220919: Update - Running the toroid JT from a 1.5v battery through a variable resistor to control the amps, the Toriod JT oscillated between 170kHz and 780kHz. My "laboratory grade" power supply is adding some mains frequency to the equation. ======================================================Why build a "no coil" Joule Thief: Fewer parts, small size., no coil to wind. Most of these parts can be found in broken routers, radios, etc. OTHER JOULE THIEF VIDEOS:Joule Thief, No Toroid Coil - How to Buildyoutu.be/g2jMrNFV4nQJoule Thief, No Toroid Coil - How to Buildyoutu.be/erEb2fjsc10Joule Thief - Detailed Buildyoutu.be/IV3lArO0_0UJoule Thief - What's The Frequency, Kenneth? (4K)youtu.be/9IeVKDuR3kkHow To Wind A Toroid Coil - For Joule Thief, etc.youtu.be/_wvFv4YVYU0Joule Thief Experiment - Light Switchyoutu.be/L0qZ2ttEe4QJoule Thief Core Ratio & Variable Frequency Experimentyoutu.be/vli5LIGNlqMJoule Thief Micro-Powered by Lite, Heat, Magnetism & Chemical Energyyoutu.be/MDgAEre91wEMechanical Joule Thief - Is It Possible?youtu.be/6KDfSrNK82MJoule Thief Toroid Ratio & Variable Frequency - Experimentyoutu.be/en9eb2LuqI4Joule Thief PLUS Crystal Radio Equals ??? (Pt 1)youtu.be/bb0kNE15YssJoule Thief + Crystal Radio = ???youtu.be/za-mAlrdtkk======================================Experimental - Buy Me A Coffee Donation Linkbuymeacoffee.com/tsbrownieN
Joule Thief - No Toroid Coil, Build (4K) tsbrownie 2022-09-17 | This is a flyback oscillator which allows a 1.5v LED to be lit by a dying / dead 1.5 volt battery. Most use a toroid coil which is bigger and likely will waste more power than the SMD inductors. Why build a "no coil" Joule Thief: Fewer parts, small size., no coil to wind. Most of these parts can be found in broken routers, radios, etc. Most of the toroid devices oscillate at a frequency of around 12kHz to 25kHz, but this type resonates around 800kHz to 1.2MHzCONSTRUCTION NOTESCoils are labeled L or FB (ferrite bead) If you can't tell the difference between a surface mount inductor and capacitor you should be able to use a volt meter set on resistance (ohms). An inductor should show a steady reading. A capacitor should show a brief reading then settle down to near zero. This is version 2.0 and unfortunately has a more limited voltage range (0.4v to 0.7v) than version 1.0 (0.3v to 1.2v), the difference between the two being the SMD inductors used. MATERIALS- Transistor (2n2222 or equivalent hfe of 35 or better)- 2x surface mount inductors (4 x 1.5 x 1 mm approx)- LED (good efficiency)If you can't tell the difference between a surface mount inductor and capacitor you should be able to use a volt meter set on resistance (ohms). An inductor should show a steady reading. A capacitor should show a brief reading then settle down to near zero. However detecting the difference between an SMD resistor and inductor is very difficult, so it's best to ensure you separate them from the time you remove them from the circuit board.OTHER JOULE THIEF VIDEOS:Joule Thief, No Toroid Coil - How to Buildyoutu.be/g2jMrNFV4nQJoule Thief, No Toroid Coil - How to Buildyoutu.be/erEb2fjsc10Joule Thief - Detailed Buildyoutu.be/IV3lArO0_0UJoule Thief - What's The Frequency, Kenneth? (4K)youtu.be/9IeVKDuR3kkHow To Wind A Toroid Coil - For Joule Thief, etc.youtu.be/_wvFv4YVYU0Joule Thief Experiment - Light Switchyoutu.be/L0qZ2ttEe4QJoule Thief Core Ratio & Variable Frequency Experimentyoutu.be/vli5LIGNlqMJoule Thief Micro-Powered by Lite, Heat, Magnetism & Chemical Energyyoutu.be/MDgAEre91wEMechanical Joule Thief - Is It Possible?youtu.be/6KDfSrNK82MJoule Thief Toroid Ratio & Variable Frequency - Experimentyoutu.be/en9eb2LuqI4Joule Thief PLUS Crystal Radio Equals ??? (Pt 1)youtu.be/bb0kNE15YssJoule Thief + Crystal Radio = ???youtu.be/za-mAlrdtkk
Joule Thief - Whats The Frequency, Kenneth? (4K) tsbrownie 2022-09-09 | The most frequent question about the joule thief is "what frequency does it operate at?" I've got 2 that were made from the same batch of parts and today I finally got the set up to measure it, so let's find out!MATERIALS- O-scope- Joule Thief (x2) (2n2222 NPN transistor, black core, 22 and 11 windings, red LED) The common "black" core used has a range of 1kHz to roughly 200 kHz, however they can go into the low MHz range. The 2n2222 has an hfe of 30-35, Emitter Base volt of 5 (I killed my no toroid JF by ignoring this), max op freq 250 MHz....Note: Technically this is not a joule thief as is commonly made on the internet. It's a modified circuit from an antique transistor tester.
Disassemble BNC Connector - Test Equipment (4K) tsbrownie 2022-09-01 | This style of BNC connector is common on test equipment and sometimes needs wire replacement or circuit repair. This is one way to open it non-destructively. Note: This is a re-edit to fix an error and remove repetition. Sorry.WARNING: Do this at your own risk. You can damage or destroy the wire/connector/probe... if done incorrectly.
Quick Look - Nikon Film Cameras 1970s On tsbrownie 2022-08-25 | These are Nikon film cameras, lenses, and accessories starting from the early 1970s. They were beloved by journalists, sports and wildlife photographers around the world. Teens like me at that time drooled over these in shop windows. They were some of the finest film cameras ever made.Included are some of the most famous: the Nikon F, the F1, the Nikkormat, Nikonos 5 & 6 (underwater cameras). Lots of interesting accessories such as the motor-drives.Apologies for the audio, it was videoed in a mall "in the wild".
Universal Electric Plug Teardown (4K) tsbrownie 2022-08-05 | I got this while in Thailand. It fits many of the most common plug types used in Asia including the US / North America type B with parallel flat blades (with ground), round pin German (with ground), some French types, and probably a few others. It does not work with square pins (England/Australia). Made by Japanese company Panasonic, but NOT used in Japan (they use more like the US types)Model: WEG 15929 1.5-4mm^2 solid copper only250 volt16 ampThis one was made in Thailand, but they are also made in Japan. Common in Thailand (plus others), some use in Vietnam, some use in Cambodia,....
Restore Yamaha P-32D Pianica Melodian (4K) tsbrownie 2022-07-16 | This was a flea market find. These are also called Melodica, Melodeon, Wind Instrument, etc.I've seen these new priced between $60 and $80. We got two at a flea market for $3.50. Both work well after a thorough cleaning.Cleaning is necessary with these because the breath used to power them carries stuff that adheres to the insides causing the keys to become stickier over time. And it's a good idea to clean one if you get it used like these.I have used clean water only, and if there's a lot of buildup some dish soap followed by lots of rinsing. You want to ensure all the soap is gone.Do not leave them soaking for long periods of time because the brass reeds may corrode and that will ruin them.Take extreme care not to damage the reeds. Don't use cloth or brushes that can snag and bend them. Light finger cleaning is best. Also be careful with the gaskets. I have not been able to find replacements. TOOLS NEEDED:- Medium size phillips head / cross head screw driverJohn Batiste on the Melodica:youtube.com/watch?v=0yslRbbivMMyoutube.com/watch?v=_tx0_eT36OQyoutube.com/watch?v=36-dCqsr7hcyoutube.com/watch?v=Up5bdqj30ysyoutube.com/watch?v=J8Gz5CgGQZIyoutube.com/watch?v=x4wmh0PULwsJohn Batiste vs Weird Al:youtube.com/watch?v=ey52xSGQ7SAStevie Wonder Performs The Star Spangled Banner with John Batiste:youtube.com/watch?v=a-3oKQHfCzQMelodica Review:youtube.com/watch?v=5qZRluK8FKwyoutube.com/watch?v=wkrWc8Fvx-E
Soldering Tool Scam? tsbrownie 2022-07-08 | It sounded interesting:Sold under Motors - Automotive - Tools & Equipment - Diagnostic & Test Tools - Electrical Testers & Test Leads"Pen Type Rosin Atomization Machine Short Circuit Detector Electronic Component Motherboard Short Circuit Detection Tool Portable Mobilephone Maintenance Rosin Pen No Need Soldering Iron with Storage Bag""Product details of KKmoon Pen Type Rosin Atomization Machine Short Circuit Detector Electronic Component Motherboard Short Circuit Detection Tool Portable Mobilephone Maintenance Rosin Pen No Need Soldering Iron with Storage Bag""This rosin atomization machine is a very practical tool for detecting circuit board short circuit in your daily and work. You don't need to use an electric soldering iron, just with this tool, you can quickly detect the fault point. Come on and try it, it will not let you down."
Magnetic Field Viewing Film Review (4K) tsbrownie 2022-07-06 | This piece is 50x50mm, but it comes in different sizes.I paid about $4 with shipping.From Wikipedia:Magnetic field viewing film is used to show stationary or very slowly changing magnetic fields; it shows location and direction. It is a translucent thin flexible sheet, coated with micro-capsules containing nickel flakes suspended in oil. When magnetic lines of force are parallel to the surface of the carrier sheet, the surfaces of the flakes are reflective, and appear bright. When lines of force are perpendicular to the sheet, the flakes are edge-on, and appear significantly darker. When the film is placed on a magnet's pole, the latter case applies.
Spring Clip Too Hard - Pro Tip (4K) tsbrownie 2022-06-23 | The wire belt / clothing clips that are on camera equipment, camping equipment, etc. have very strong wire bails that are real fingernail breakers. In the past I have bent the clip until it was looser, but then it's looser.I found I can put a zipper pull on the clip and use that to help open it. No clip strength is lost and the pull stays out of the way behind clothes until needed.
Whats Inside a 23A, 12V Battery? (4K) tsbrownie 2022-06-20 | I first saw these 12 volt batteries used in film cameras in the 1990s(?). They are becoming harder to find, going up in price, and seem to be used in fewer applications. Thought it would be interesting to open one and see what's inside.WARNING: These things contain toxic chemicals. Do not try this at home! I got several chemical burns on my hands in making this video! I wore googles, but I'd hate to think what would happen to an eye if one of those crystals got in it even for a short time.
$25 Color Oscilloscope! The Incredible DSO138 (4K) tsbrownie 2022-06-14 | I wish I had this when I was learning electronics in high school. After the resistor, capacitor, and inductor basics, oscilloscopes are almost indispensable in next stage electronics. Most electronic equipment contains oscillators, from clocks to computers, and an o-scope is a critical diagnostic tool. Video of it in use with joule thief and frequency generator:youtu.be/6og4H4boWVoThis one cost about $25 with the case (but I'd skip the case next time). It has many of the functions of my $600 scope. Personal Observations: Its upper limit is 500KHz, but is better starting at 400KHz down. It is not automatic, you have to be close with the timing before it syncs and gives good detail data.==========================================================INFO I HAVE SCRAPED TOGETHER. Supplied "as is". You take all the risks for how you use it!OPERATIONS:[SEL] button: Selects parameter to change. Selected parameter will be highlighted blue. Press on [+] or [-] button to change parameters options. Press & hold SEL to save settings.[OK] button. Quick press: Run / Stop. Long press: detail measure on/off.[CPL] switch: Sets coupling to GND, AC, DC. If GND, scope input is isolated from input and connected to ground (0V input).[SEN1] & [SEN2] switch: Adjusts sensitivity. The [SEN1] X [SEN2] = actual sensitivity. Displayed at panel lower-left corner.[RESET] button: Resets system & reboots the oscilloscope.TRIGGERS / MODES[AUTO] MODE: Is the same as Normal mode, except it forces the oscilloscope to trigger if the trigger conditions are not met.[NORMAL] MODE: Displays a waveform when the trigger conditions are met, otherwise the oscilloscope does not trigger and the display remains unchanged. Normal and single modes are useful for capturing sparse or single waveform.[SINGLE] MODE: Is the same as normal mode except that oscilloscope will enter HOLD state after a trigger has been detected and waveform display has been updated.TURN ON/OFF MEASUREMENT DETAIL: Press [OK] button for about 2 seconds. WAVEFORM SAVE/RECALL: a) Press [SEL] & [+] simultaneously: Save displayed waveform to non-volatile memory.b) Press [SEL] & [-] simultaneously: Recall saved waveform.0V LINE ALIGNMENTIf the 0V line (the trace corresponding to 0V input voltage) does not match the VPOS indicator at the screen left border, it can be fixed by performing the “0V line alignment” function. 1. Set the [CPL] switch to GND position. Then press [SEL] button until VPOS indicator is highlighted and hold down [OK] button for about 2 seconds. The trace with be aligned to VPOS indicator when you release the [OK] button. It is normal for some residue mismatch to remain at the highest sensitivity settings.PROBE CALIBRATIONProblems may need calibrating for more accurate results at high frequencies. 1. Connect the clip to the test signal terminal and leave the black clip (ground) disconnected.2. Set [SEN1] switch to 0.1V and [SEN2] switch to X5. Set [CPL] switch to AC or DC.3. Adjust time base to 0.2ms. You should see a square waveform. If traces are not stable adjusttrigger level (the pink triangle on right screen border) until it is stable.4. Turn C4 (capacitor trimmer) with a small screw driver so that the waveform displays sharp right angle.5. Set [SEN1] switch to 1V and [SEN2] switch to X1. Keep all other settings unchanged. Adjust C6 until a sharp right angle waveform is displayed.TEST MODE: Is used to find possible opens (for all port pins) and shorts (for pins PB0 - 15, PC13-15). It first checks PB and PC pins with special patterns to find possible shorts. LED will blink fast if found. Otherwise, it will generate 3.3V and 0V alternatively at each port pins (PA, PB, PC, PD) at about 4 seconds. These signals can be used to check for opens.How to use: Hold down SW4 and press RESET to enter Test Mode.If LED is blinking fast that means there are shorts on PB or PC pins.Find out the shorts before continuing.If LED is blinking slowly, use a volt-meter to check each pin related connections that are suspected open. If there is no voltage change at a point which should be connected to a port ppin there may be open between the point and port pin.
Solar Inverter Cooling Fan Upgrade (4K) tsbrownie 2022-06-13 | We made a solar powered fan bar for our convection cooled solar inverter, just to ensure there was air movement on the hottest days. It was loud and hard to clean the fans. This design aims to improve on both of those factors.Link: thingiverse.com/thing:5413536WARNING: As with all electrical projects, there is always danger of shock, fire, burns, and electrocution. If you don't know, learn first or don't do it!
Lensatic Army Compass - Whats Inside? (4K) tsbrownie 2022-06-13 | A lensatic compass is one with a lens (for alignment with landmarks) and a dial instead of a needle.From Wikipedia:The military forces of a few nations, notably the United States Army, continue to issue field compasses with magnetized compass dials or cards instead of needles. A magnetic card compass is usually equipped with an optical, lensatic, or prismatic sight, which allows the user to read the bearing or azimuth off the compass card while simultaneously aligning the compass with the objective. Magnetic card compass designs normally require a separate protractor tool in order to take bearings directly from a map.[21][22]The U.S. M-1950 military lensatic compass does not use a liquid-filled capsule as a damping mechanism, but rather electromagnetic induction to control oscillation of its magnetized card. A "deep-well" design is used to allow the compass to be used globally with a card tilt of up to 8 degrees without impairing accuracy.[23] As induction forces provide less damping than fluid-filled designs, a needle lock is fitted to the compass to reduce wear, operated by the folding action of the rear sight/lens holder. The use of air-filled induction compasses has declined over the years, as they may become inoperative or inaccurate in freezing temperatures or extremely humid environments due to condensation or water ingress.[24]
Cataract Surgery Update - Left Eye (4K) tsbrownie 2022-06-08 | I go over my case briefly, then discuss what I talked about with my new doctor. I review the procedures I have had.Update from last July 5, 2019 report. My "journey" started on Aug 24, 2018. I've learned much along the way, too much of it was too late. ****** OTHER CATARACT VIDEOS: Day 0 - Cataract Surgery, Lens Replacement, Eye Safetyyoutube.com/watch?v=oD9sD16-3CcDay 1 - After Cataract Surgery, Lens Replacementyoutu.be/4a26iJ9NHRcDay 7 - Eye Surgery, Cataracts - Things You SHOULD know FIRSTyoutu.be/lWJTOFr4YP0Day 315 - Eye Surgery, Cataracts - When Things Go Wrong youtube.com/watch?v=CJ9kV2mMrg4Cataract Surgery Update - Left Eye (4K) youtube.com/watch?v=CzK-FbmhVccWARNING: I am only sharing my experience. I am NOT a doctor nor medically trained. Always get your medical advice from your doctor, never from me or the internet! I am not recommending any doctor, device, procedure, these are what applies to me - consult your doctor for what is best for you. I do not get any compensation for anything mentioned in the video.
Float Valves Declining Quality - Caveat Emptor (4K) tsbrownie 2022-06-03 | You have to check before you buy, even when buying the same model from the same brand. Comparing 2 float switches by the same company made years apart. One was working after 7 years, the other started sticking after 1. They had changed key components....
Helping Bees Get Needed Water (4K) tsbrownie 2022-05-29 | During dry spells bees need water and go looking. They prefer "natural" water that has minerals and such; water we might consider dirty. We arranged a flagstone in a planter so the air conditioner drip water would fall through a bush and on to the stone. The water never gets deep and has moss and plant matter that bees tend to prefer. The flagstone is sitting on big river rocks so the water does not pool and it all dries out when the AC's off (avoiding mosquitoes).Bees need water to make honey. They also use it to regulate the temperature of the hive, feed young bees, and dilute stored honey. They also receive nutrients from water.
Warning: Power Cables Are NOT The Same! (4K) tsbrownie 2022-05-23 | Bought an oscilloscope, but it came with a German electric plug. I need to find a US C-13 type cable, BUT I find that it's not clear from what's on the cable (and what's available on the internet) which cable to use and how many amps it can handle safely!It’s an easy-to-overlook fire hazard, but the VDE c 13 cables used with TVs, computers, monitors, UPSs, etc. come in several different sizes and load carrying capabilities. Using a too small cable on a device can lead to a damaged cable or fire! Unfortunately, manufacturers of both cables and devices do not make it easy for the average consumer to know which plugs can be used safely with what devices.===========================For more info google: Ampacity Charts for your country/state/regionVDE cable: Verband der Elektrotechnik, Elektronik und Informationstechnik – aka VDE – in English is the Association for Electrical, Electronic and Information Technologies.
USB Oscilloscope-Pros & Cons (4K) tsbrownie 2022-05-11 | Many years ago I bought a USB oscilloscope. It's a small box with 2 BNC connectors, a USB port, and a test signal out. It came with software that takes data from the box and makes the computer into a nice oscilloscope. BUT, would I do it again? Why or why not? There are several factors one might find important that I never heard discussed before I bought.
Cheap Jumper Danger! Check Before Using! (4K) tsbrownie 2022-04-24 | Bought some new jumpers a while back. Only used a couple. A few days ago I pulled a couple out of the bag to test some voltage dividers and found the jumpers did not work. With some, corrosion over time had made the connection between wire and alligator clip high resistance. Others were just not wired correctly.One needs to check this stuff you order on line, not just because it may not work, but in this case a couple I was using caught fire!Note that these worked at first, but went bad over time, making the danger sneaky. Check them before use, and if the connections are dodgy, you might want to solder them while they are new and fresh.
Voltage Divider For Raspberry Pi/Arduino (4K) tsbrownie 2022-04-21 | Many devices that are used with the RPi / Arduinos are powered by 5 volts and output 5 volts, BUT the microcomputers' inputs are often limited to around 3.3 volts. Voltage dividers are inexpensive, fast, and easy ways to bring down 5 volts to a usable 3 volts.WARNING: Miswiring your microcomputer can ruin it and any attached device. Information offered "as is". You are solely responsible for how it is used.
Surprising UPS Danger! (4K) tsbrownie 2022-04-21 | Safety PSA: I got an serious and unexpected electrical shock from a computer uninterruptible power supply (UPS). Here's what happened.WARNING! Do not imitate what you see in this video if you do not know about electricity. If you suspect any electrical device is defective, take it to a qualified individual for testing.
Your Solar May Need RFI Filters (4K) tsbrownie 2022-04-10 | Learned something new about solar: whether you are using an AC inverter or DC-DC system, those lead in wires can become antennas for radio frequency interference (RFI), and that's not good!Sources of RFI on your solar system:1) Inverter itself2) Nearby transmitters (radio, TV, cell phone, etc.)3) Amateur radio4) Lightning (especially nearby strikes) (chokes are NOT a substitute for an arrestor system!)Typically you can block RFI (ex: grounded metal conduit), or filter RFI (ex: clamp on RFI filters). It helps to keep the DC leads as short as possible and twist them if possible. Typically used are type 31 and type 75 ferrite clamp on beads. Type 75 is most effective at lower HF frequencies (3MHz to 30MHz) while the type 31 is best around the higher HF and low VHF (30MHz to 300 MHz) spectrum.Per the Palomar-Engineers "As solar photovoltaic (pv) system installations are becoming more popular, solar pv radio frequency interference (RFI) is also becoming more evident and effective RFI suppression techniques are needed to ensure the performance of electronic devices connected to or in the presence of the pv system."INTERESTING LINKSgoogle article by Tony Brock-Fisher, K1KP "QST20Solar20April2020165b25d.pdf" palomar-engineers.com/rfi-kits/solar-system-rfiNOTE: This video was taken with my phone because the nearby cell phone tower interferes with my digital camera's microphone!
Shipping Sensor Stickers-Protect Your Packages (4K) tsbrownie 2022-04-10 | Before I videoed this, I had never actually seen these work. The following are examples of available sensor stickers of different types. They all come in many sensing ranges.- HEAT sensor stickers seem to range from just over $1 to $3 each depending on range and brand.- HUMIDITY sensor stickers: range from 4 dot at 55 cents to 6 dot at 10 cents (in bulk). The price seems backwards, but I double checked. - TILT sensor sticker: $1.50 to $1.70 each. - IMPACT sensor sticker (measures G loads): $1 to $8 each.
DC Solar Charge Controller - Tip & Teardown (4K) tsbrownie 2022-04-10 | Got an old DC solar charge controller. Thought you might be interested on what's inside. I'm going to salvage anything interesting. We shall see.
Beech 35 With (rotten) Wood Prop (4K) tsbrownie 2022-03-27 | Did you know that Beechcraft used a wood prop on its early 35 and 35A models? I did not. Do you know what happens when you leave one outdoors in the weather? I did not know that either, but it's ugly. Really, really ugly.This video was take in Thailand at an air museum. Thanks to Mr. J.
Retinal Tear/Detachment-Peripheral Photocoagulation (4K) tsbrownie 2022-03-17 | I went in for a followup eye exam and found a problem that had to be corrected before any further cataract surgery could be considered. From UCLA Health website “After the age of 50, about 40 percent of the population already has a vitreous detachment. The more nearsighted the person is, the higher the chance for them to have this condition happen to them,” says Gad Heilweil, MD, an ophthalmologist at Doheny Eye Center UCLA.Per Pradeep Prasad, MD, at UCLA Stein Eye Institute. As people age, the gel-like vitreous in the eye begins to liquefy and contract, peeling away from the retina. This can lead to a retinal tear or detachment. It can be vision-threatening and requires urgent medical attention. “It’s impossible for a patient to be able to distinguish between a vitreous detachment, which is bothersome, and an associated tear or detachment,” Dr. Prasad said. It is important to see an ophthalmologist.-----------------mayoclinic.org/diseases-conditions/retinal-detachment/symptoms-causes/syc-20351344Mayo ClinicWhen to see a doctorSeek immediate medical attention if you are experiencing the signs or symptoms of retinal detachment. Retinal detachment is a medical emergency in which you can permanently lose your vision.CausesThere are three different types of retinal detachment: Rhegmatogenous (reg-ma-TODGE-uh-nus). These types of retinal detachments are the most common. Rhegmatogenous detachments are caused by a hole or tear in the retina that allows fluid to pass through and collect underneath the retina, pulling the retina away from underlying tissues. The areas where the retina detaches lose their blood supply and stop working, causing you to lose vision. The most common cause of rhegmatogenous detachment is aging. As you age, the gel-like material that fills the inside of your eye, known as the vitreous (VIT-ree-us), may change in consistency and shrink or become more liquid. Normally, the vitreous separates from the surface of the retina without any complications — a common condition called posterior vitreous detachment (PVD). One complication of this separation is a tear. As the vitreous separates or peels off the retina, it may tug on the retina with enough force to create a retinal tear. Left untreated, the liquid vitreous can pass through the tear into the space behind the retina, causing the retina to become detached. Tractional. This type of detachment can occur when scar tissue grows on the retina's surface, causing the retina to pull away from the back of the eye. Tractional detachment is typically seen in people who have poorly controlled diabetes or other conditions. Exudative. In this type of detachment, fluid accumulates beneath the retina, but there are no holes or tears in the retina. Exudative detachment can be caused by age-related macular degeneration, injury to the eye, tumors or inflammatory disorders.Risk factorsThe following factors increase your risk of retinal detachment: Aging — retinal detachment is more common in people over age 50 Previous retinal detachment in one eye Family history of retinal detachment Extreme nearsightedness (myopia) Previous eye surgery, such as cataract removal Previous severe eye injury Previous other eye disease or disorder, including retinoschisis, uveitis or thinning of the peripheral retina (lattice degeneration)
Asian Fantail Chick & Parents (HD) tsbrownie 2022-03-03 | These little birds are interesting to watch, and they have a very distinctive (and loud) call. They eat lots of insects and are hard workers. Mom and Dad are trying to get Baby to fly, but Baby wants none of that. His sibling did not make it yesterday after trying his wings and falling to the ground. Baby would rather eat!-------------------From Wikipedia: Fantails are small insectivorous birds of Australasia, Southeast Asia and the Indian subcontinent belonging to the genus Rhipidura in the family Rhipiduridae. Most of the species are about 15 to 18 cm long, specialist aerial feeders, and named as "fantails", but the Australian willie wagtail is a little larger, and, though still an expert hunter of insects on the wing, concentrates equally on terrestrial prey.The true wagtails are part of the genus Motacilla in the family Motacillidae and are not close relatives of the fantails
Solar Power From Clouds? Rare Phenomenon (HD) tsbrownie 2022-02-27 | At shortly after 6 in the morning late February, my solar inverter becomes active even though the sun is still below the horizon. Apartment buildings block direct sunlight on most days until about 07:30. Solar panels usually have to have pretty direct light before they start to produce significant amounts of power. This is both interesting and a safety concern: solar panels can start to produce power at unexpected times. In this case, it's a good thing.It's happened a few times before in the evenings, but never in the morning. In fact, I once had a solar pump that was running an hour after sunset.
Tree Cutting In Asia - If This Dont Scare You... (HD) tsbrownie 2022-02-27 | DO NOT try this at home! Not sure how, but no one got injured/killed, but it is super scary. Count the number of safety violations and leave your comments. This is why we have OSHA. Courtesy of a friend in Asia. It was shot from a distant rooftop on a cell phone so the video's a bit rough.
Point Of Use Water Heater-Whats Inside? (4K) tsbrownie 2022-02-19 | We look inside a point of use hot water heater for showers.This one is 220 volts, single phase, 4500 watts. It will heat water about 20C (68F) above ambient.WARNING: This is NOT a DIY or training video. A mis-installed heater can shock and kill. Do not install, repair, or maintain one of these devices.
A Hard Lesson In Health Problem Communication (4K) tsbrownie 2022-02-17 | Had some serious symptoms that took me to the emergency room, but things did not end as I thought they might. I hopefully learned a rather expensive lesson..Per the CDC's website:"Your respiratory illness might be influenza (flu) if you have fever, cough, sore throat, runny or stuffy nose, body aches, headache, chills and/or fatigue. Some people may have vomiting and diarrhea, though this is more common in children. People may be sick with flu and have respiratory symptoms without a fever. Flu viruses usually cause the most illness during the colder months of the year. However, flu can also occur outside of the typical flu season. In addition, other viruses can also cause respiratory illness similar to flu."The Mayo Clinic also has similar information.
2002 Win98 Computer Dumpster Find-Will It Run? (4K) tsbrownie 2022-02-17 | The neighbors put this computer out under their carport for months. I kept my eye on it because I figured it was headed for the trash. When that fateful day arrived I pounced. It looks almost new, inside and out. My fantasy is that I plug it in and it works. Do dreams really come true?.......Update: I fiddled with the bios settings and got the thing to boot reliably to DOS, but that's it. No windows. Can't even find drivers for the CDROM under DOS. :'(It's about as slow as one could hope for. Too bad I don't have a bunch of the old 3.5" floppy DOS games like frogger from my hardcore gaming days.BTW: It's a 1.2 GHz Celeron CPU.
Button Battery Holder Fix (4K) tsbrownie 2022-02-11 | I've ordered 4 clock modules that rely on lithium button batteries, and none of them worked when I got them. Turns out there was no contact between the minus side of the battery and the minus contact on the board. It's the kind of thing that will drive you crazy until you see the little flaw. This is a simple fix.MATERIALS:- Soldering iron- Solder- Solder wick or solder remover toolWARNING: Soldering carries risk of shock, burns, fire, etc. and involved toxic materials. If you don't know, learn first or don't do it.
Rice Barges On The River-A Rainy Bangkok Day (4K) tsbrownie 2022-01-28 | A rainy day on the river. In the first half, a string of empty rice barges is being towed northward up river in slack water (neutral tide). In the second half, about 30 minutes later, the rain has picked up and the current is beginning a southern flow to the ocean.Chao Phraya River, Bangkok Thailand.
C-Clamp Swivel Pad Fix-Short Version (4K) tsbrownie 2022-01-16 | This is the short, 3 minute, version of my C-clamp fix without all the other methods I considered along the way.I've had this broken C clamp sitting on my work table for 4+ years. Today I'm going to fix it or toss it. I will show you the different methods I considered, and the one I settled on. It works better than new.This is the long version if you want to see the things I considered and the mental process (anguish).youtube.com/watch?v=SgxKp4zlyIw
C-Clamp, Swivel Pad Fix-Long Version (4K) tsbrownie 2022-01-14 | I've had this broken C clamp sitting on my work table for 4+ years. Today I'm going to fix it or toss it. I will show you the different methods I considered, and the one I settled on. It works better than new.
Houses Water-Pressure Is Low, Caused By Saddle Clamp (4K) tsbrownie 2022-01-11 | Our house's water pressure and the flow has been steadily decreasing. We have complained to the city; they send somebody out, tell us there was pipe break on the main line, probably dirt in the line, it will clear up. Months go by, we complain more. Finally they sent someone out and they checked the flow/pressure in several houses and concluded that the "new" neighborhood line / work introduced some defective taps. This is what ours looked like after about 3 years and why we were having problems.
Arduino IR Remote Control (4K) tsbrownie 2022-01-02 | Today I am finishing up a "rainy day" project I started over a year ago. Because of radical changes in the library, no available (working examples), etc. it took me hours yesterday to finally get it right!Warning: Miswiring your Ardunio can ruin it and all the attached device. Information offered "as is", you agree you are solely responsible for how you use it. If you don't know, learn first or don't do it.Here's some time saving on the code: case 0xBA45FF00: Serial.println("On/Off"); //Your code here. break; case 0xB847FF00: Serial.println("Menu"); break; case 0xBB44FF00: Serial.println("Test"); break; case 0xBF40FF00: Serial.println("+ (Channel Up)"); break; case 0xBC43FF00: Serial.println("Back"); break ; case 0xF807FF00: Serial.println("Reverse"); break; case 0xCA15FF00: Serial.println("Play"); break; case 0xE609FF00: Serial.println("Fast forward"); break ; case 0xC916FF00: Serial.println('0'); break ; case 0xE619FF00: Serial.println("- (Channel Down)"); break; case 0xE20DFF00: Serial.println('C'); break; case 0xFA19A1C1: Serial.println('1'); break; case 0xE718FF00: Serial.println('2'); break; case 0xA15EFF00: Serial.println('3'); break; case 0xC708FF00: Serial.println('4'); break; case 0xE31CFF00: Serial.println('5'); break; case 0xA55AFF00: Serial.println('6'); break; case 0x8D42FF00: Serial.println('7'); break; case 0xAD52FF00: Serial.println('8'); break; case 0xB54AFF00: Serial.println('9'); break;
