“Driverless” Tesla Coil SciTubeHD 2024-07-20 | We have refined our driverless Tesla call which uses ZVS or zero voltage switching to run a Tesla coil primary at resonance. ZVS circuits are typically used with induction heaters and to run flyback transformers. In this video we test a PCB which we designed. When I say We, I mean Arc Angel Tesla coil and myself. The PCB was designed using the free online design tool provided by easyEDA. The Gerber files created were uploaded to JLCPCB directly from the easyEDA webpage to create the printed circuit boards for this project. The boards were designed to have a ground plan and thick traces to handle more current. This video is to test the board and show that it can be used to very easily construct working high power solid-state Tesla coils. The Tesla plasma output was pretty impressive and I hope you agree. Please watch the video and don’t forget to like and subscribe if you enjoy this video. We are going to construct more boards and will have some giveaways. Gerber files for making your own board from JLCPCB can be downloaded here:drive.google.com/file/d/1LT99xMJM3GokFdwl1bjIvzCh1FI0mYt3/view?usp=sharingBill of materials (BOM) can be downloaded here:drive.google.com/file/d/1e315jqtna1GlXcUyhYC_6J7t62630wV5/view?usp=sharingThe two IRFP260 MOSFETs are not included in the BOM and would have to be manually added. I’m sure this would also work with other MOSFETS such as the IRFP460. On testing the boards, the current in the primary was too high using a 150 nF capacitor as the primary only had 2 turns to resonate the secondary. I soldered up a second board and used a 100 nF capacitor instead. The results were much better with less current and capacitor/wire heating and the primary turns were closer to 3.25.I will put together another video shortly showing how to tune these. ArcAngel Tesla also has an excellent video on how to tune these up so check out his channel too!
High Voltage AC vs Flame SciTubeHD 2024-07-27 | In this video, we explore the effect of high frequency, high voltage, alternating current from a Tesla coil on a burning Brazil nut. This makes a very clean yellow flame easy to see the effects.
Brazil Nut vs Tesla Coil! SciTubeHD 2024-07-27 | In this burning hot video, a Brazil nut is lit on the breakout point of a Tesla Coil. The Tesla coil is then activated. Interesting effect on the flame!
Part2- Tuning “Driverless” ZVS Tesla Coil SciTubeHD 2024-07-25 | In this video.- the main point is tuning a double resonant Tesla coil to run off a “driverless” ZVS oscillator. If done right, great output from the coil is possible even with small coils. This rig is built with readily available components and uses a PCB. On some of the scope shots I talk about interference from the coil getting into the household mains. In fact this “noise” is actually not as bad as it looks and due to both the oscilloscope and the coil itself being my connected to the same isolation transformer. When repeated with the coil connected directly to the mains and using a battery powered scope, then there is no noise at all visible in the house mains. Please also check out ArcAngel Tesla coils channel for a great coil tuning video. If you decide on making this coil, here is a link to the gerber files and BOM. The BOM doesn’t include the iron core inductors or the ITFP260N MOSFETs but these are readily available on eBay or from Mouser or DigiKey. Pretty much any value inductor of 50-100 uh will work!Gerber files for making your own board from JLCPCB can be downloaded here:drive.google.com/file/d/1LT99xMJM3GokFdwl1bjIvzCh1FI0mYt3/view?usp=sharingBill of materials (BOM) can be downloaded here:drive.google.com/file/d/1e315jqtna1GlXcUyhYC_6J7t62630wV5/view?usp=sharing
War of the Plates SciTubeHD 2024-06-24 | On a recent trip to Chengdu in Sichuan province, an interesting phenomenon is occurring. Every year, there are more and more cars with green license plates. In this video, we explore this phenomena in more detail.  Here is my experience!
Robot Food Delivery SciTubeHD 2024-06-04 | Robotic food delivery is everywhere in China. The robot dials the phone to let you know it’s outside the door.
Coupling transformer feedback-Works (sometimes)! SciTubeHD 2024-05-09 | In this video, we test whether it is possible to use feedback from the induction heater coupling transformer instead of using a current shunt on the primary tank. The advantage is that the current is much much lower and there is much less wasted energy. There were many problems with using wire shunts including melting of the wire and failed components.One of the advantages is that at least 20 times less current is flowing in the isolation transformer windings compared with the primary tank circuit. This makes setting up a feedback transformer much simpler and easier. Also, primary feedback in this set up seems to be even more effective compared with the secondary feedback that I’ve been using up to this point!**** SPOILER- just found out that coupling transformer as a source for feedback is not reliable and will not work for certain types of coupling transformers, different number of windings on particular coupling transformers, or with certain work pieces. For example, the feedback is very unreliable when trying to heat a graphite crucible using this method for feedback.I went back to using a small cap (about 100 nF) in series with the main tank and using a 20-40 turn current transformer and burden resistor across on one of the legs of this smaller cap. With 700A in a 4 uF tank, that gives (0.1/4.0) x 700 = 17.5A flowing in the smaller cap. With a 36 turn current transformer = 17.5/36 = 0.486A flowing in the transformer. With a 56 ohm burden resistor = 0.486 x 56 = 27V of feedback voltage. Heat dissipation in the 5W rated resistor is (0.468) ^2 x 56=13W. !!!I’m now using 2 x 56 ohm resistors in parallel giving 14V feedback and 6.6W heat dissipation in the resistors. With the single 56ohm, the 5W resistor heated up to greater than 100 C. With the two parallel resistors it’s getting to 40 C so I’m using this arrangement. When I lowered the small bypass cap to 10 nF, there was insufficient current to drive proper feedback.Please check out the original video here: Final Video-High Power Current Controlled Induction Heateryoutu.be/wZ8wGRp2Js0
Capacitor shunt replacement for copper wire shunt-Test SciTubeHD 2024-05-08 | After reading the comments from the previous video (youtu.be/wZ8wGRp2Js0?si=3HzPNvr3r8AOG5Ao)someone with with YT channel name Contomo (YT- youtube.com/@contomo5710?si=j8Jh8Sv2dvfnbES7 ) suggested using a small capacitor in series with the main tank instead of a wire current shunt. Thank you Contomo for this great suggestion!I made this vid as a quick test using a capacitor shunt instead of a copper wire current shunt. I took some twisted wire and connected it across the 4 uF cap bank. I then connected this to a 10 nF capacitor which reduces the current flowing across the capacitor by 400 times so 400 amps in the main tank becomes 1 amp across the small capacitor. I then put a 40 turn ferrite transformer across one of the legs of the 10 nF capacitor which drops the current from 1 amp to 1/40 amp. With a 56 ohm burden resistor it gives me 1.4V when there is 400A in the tank. This value is a little too small for feedback.The corresponding output with a 100nF capacitor is 14V so I’m going with the 100 nF which is enough for feedback. When I tried to increase the voltage by using higher value burden resistor such as 1000 ohms, then the corresponding output showed a phase shift. So definitely low resistance such as 10-100 ohm values are necessary!
Final Video-High Power Current Controlled Induction Heater SciTubeHD 2024-05-07 | This is the final video in my series of videos on induction heater construction. In this particular build, we implement current control to prevent damage to components such as capacitors and transistors. This has been tested over several runs and seems to work really well for a much more robust build. For construction details , please refer to the following sites:teslascience.wordpress.com/simple-and-effective-induction-heater-current-control-circuitteslascience.wordpress.com/autotuning-9kw-induction-forge-version-1-2This particular build can use any type of induction heating coil and works on a feedback based mechanism similar to that employed in solid state, Tesla coils. This particular unit has been tested up to almost 10 kW. However, on regular runs, it is usually operated between 2and 5 kW. Levitation of metals in levitation type set ups requires much higher power levels. A lot of this is in the form of wasted energy. However, heating large workloads is much more efficient.*********** Just found out that I can do away with the current shunt and get way more effective feedback from the coupling transformer. In addition, the current in the coupling transformer ia minimum 16 to 20 times lower than that in the primary tank. Check this channel to see how this is done*********The video of the coupling transformer feedback is shown here:youtu.be/wZ8wGRp2Js0?si=C7L5ij8yt7cSZ6GrIn summary, I hope this build comes in useful for your future induction project.  Care has to be taken during this construction, particularly if there are exposed live wire connections. Again, thank you for looking at this video. Your comments are most welcome. 
Over current dem SciTubeHD 2024-05-07 | We are prototyping the solid-state set up for controlling the amount of current in feedback induction heaters. The specific heater I’m talking about is shown in this link:teslascience.wordpress.com/autotuning-9kw-induction-forge-version-1-2Although these feedback induction heaters work very well, one of the main problems with them has been component failure due to very high current build up in the tank when the coil is unloaded. For this region, I have been collaborating with. Imsmoother (YT channel) ( J Kraidin) do you in developing and prototyping a current limit circuit.
Inductive levitation of aluminum with feedback heater setup SciTubeHD 2024-04-23 | This inductive heater uses the principle of secondary feedback to drive the circuit into resonance. A novel current limiter circuit is employed to improve the life of the resonant capacitors. Working in collaboration with J Kraidin we were able to improve on this heater. For construction details including our current limiter, please check the following link:teslascience.wordpress.com/simple-and-effective-induction-heater-current-control-circuit
Sunshine for Less: Affordable Hacks for Viewing Solar Phenomena  SciTubeHD 2024-04-17 | In this video, we explore simple easy ways to view the sun safely as well as photograph it and observe solar phenomena. This video explores devices such as pinhole cameras, paper plate viewers, modified cameras, as well as simple modifications to cell phone cameras to observe the sun in its full fury.
Easy Overcurrent Protection - Induction SciTubeHD 2024-02-15 | This vid is a demo of a simple, overcurrent protection set up I’m using to control the current in the tank circuit of this induction heater when there is no load present. So far, seems to be working great. In addition, the threshold for current can be set with a potentiometer. Current threshold can also be increased by decreasing the thickness of a current shunt wire on the induction heater. To learn more about how this current control works, please check here:teslascience.wordpress.com/simple-and-effective-induction-heater-current-control-circuitFor build instructions for this type of induction heater please read here:teslascience.wordpress.com/autotuning-9kw-induction-forge-version-1-2
Solder vs Superheated Steam SciTubeHD 2024-01-17 | In this experiment, steam is generated by heating water in a metal can using a small homemade induction heater. The steam is passed through a small coiled copper pipe. The pipe is heated to near red heat with a propane torch. The superheated steam coming out from the other end of the pipe is capable of setting fire to things, melting, plastic, burning paper, charring wood, boiling water, and melting solder.  This experiment demonstrates that an enormous amount of energy can be transferred in the steam.
Amazing Experiments Superheated Steam SciTubeHD 2024-01-17 | This particular video was put together to answer some of the comments that were mentioned on my last recent video experimenting with superheated steam. In this video, the heating coil, for the steam was changed to a smaller one, allowing more efficient heating of the steam. In addition, when the experiments were performed a visible distance was maintained between the steam end of the tubing and the object being heated. This allowed clearer demonstration. I hope you like this video, and if you do, please consider liking and subscribing. 
Igniting matches & combusting paper using steam SciTubeHD 2024-01-15 | In this video, steam is generated at atmospheric pressure and then superheated to several hundred degrees Centigrade bypassing it through heated copper tubing. The resulting superheated steam has interesting effects on paper and matches as you will see in this video. Please don’t forget to like and subscribe if you like this video.
Lighting Match & Burning Paper with Steam SciTubeHD 2024-01-14 | At atmospheric pressure water becomes a gas, also known as water vapor or steam at 100°C/212°F. The steam produced however can be further heated beyond 100°C and when superheated can transfer a lot of energy enough to burn paper or light a match. In fact water can be heated to 3000°C before it chemically breaks down into separate elements. In this experiment, the heat is being applied via a propane torch to a copper tube, which heats the steam inside the tubing to several hundred degrees enough to perform some interesting experiments.
QCW 340V 15 ms SciTubeHD 2023-12-11 | Got some long arcs 5 ft or so with 15 ms ramp at 340V. Interestingly increasing the ramp length to 30 ms resulted in shorter fatter noisier sparks.
Tesla Coil Plasma Rectification SciTubeHD 2023-11-21 | In this experiment a high frequency high voltage diode is connected to the breakout point of a tesla coil to see if the Tesla coil will produce DC high voltage output instead of alternating current electric field .
HV Guys @ Orlando Maker Faire 2023 SciTubeHD 2023-11-10 | We had a great opportunity to attend the Orlando 2023 Maker Faire where we got to inspire kids, both young and old, with the wonders of high-voltage electricity.#MFO2023#MAKERFAIRE#ORLANDOMAKERS
The HV Guy’s at the Orlando Maker Faire 2023 SciTubeHD 2023-11-09 | We had an awesome time at the Orlando maker faire. Inspired many kids in high voltage phenomenon where they got to see, touch, and feel electricity and experience the magical phenomena associated with plasma. #MFO2023#MAKERFAIRE#ORLANDOMAKERS
Supercharging plastic bottle to Breakdown SciTubeHD 2023-09-23 | In this experiment, we use a high voltage multiplier to supercharge a thick plastic bottle to the point where the charge can no longer be contained. The results are spectacular. The plastic of the bottle holds an incredible amount of charge towards the end of the experiment.For detailed construction details on the high voltage towers, please check here:teslascience.wordpress.com/giant-static-machine-from-easy-to-obtain-materials
Supercharging a Plastic Bottle SciTubeHD 2023-09-16 | In this video, I use a 20 stage Marx generator made with 20 homemade plastic bottle capacitors each charged to 40 kV to generate approximately between 600 and 800 kV. The high-voltage is used to stress a plastic bottle to see if it’s possible to break down the plastic. However, instead of plastic breakdown, spectacular flash overs occur. Each flashover contains enough energy to burn the plastic if the bottle. Please check out the video and please don’t forget to like and subscribe if you want to see more of these type of videos. Any comments would be very welcome. 
WD40 vs Wasps Nest SciTubeHD 2023-09-02 | In this video, we explore the effect of WD-40 on a wasp nest. The nest in this particular case is located close to electrical equipment, and therefore water-based wasp killer/repellent cannot be used because it would damage the electrical components. Watch the video to see how effective WD-40 is as both a wasp, killer, and a wasp repellent. Following this video, the electrical equipment was noted to be just fine. Here is an excellent link describing difference between wasps (paper wasp) and yellowjackets.
Hand-Crank High Voltage Demo SciTubeHD 2023-08-28 | Using simple equipment, including plastic bottles, and a hand crank DC voltage generator, we can demonstrate very high voltages. Check out the video to see how this is done. Also, please come and visit us at the Orlando Maker Faire in Florida this November 4 and 5 th, 2023
Genie in a Bottle Experiment SciTubeHD 2023-08-14 | As I have lately been playing around with 35% hydrogen peroxide and had plenty of extra, I decided to do a cool chemistry experiment aka genie in the bottle. It quite literally looks like a genie coming right out of the bottle. The hydrogen peroxide is decomposed into a mixture of oxygen and steam when it comes into contact with either manganese dioxide or potassium permanganate.  Check out this video for a demonstration of this phenomena.
Phosphorescent Chemistry Demo SciTubeHD 2023-08-13 | In this set of experiments, we investigate a cool phenomenon also known as chemo luminescence. Nature has beat us to this phenomenon in terms of fire flies, deep sea angler and other such fish, and luminescent mushrooms. In this video, I demonstrate the phenomena of luminescence or phosphorescence, and compare it with the phenomena of florescence. This experiment is really interesting and touches on chemistry, physics, and photonics.
ChemoLuminescence SciTubeHD 2023-08-13 | Chemo luminescence from a reactive intermediate generated from treating a diphenyl oxalate with 35% hydrogen peroxide to generate a reactive intermediate dioxetanedione which breaks down to carbon dioxide and transfers energy to the rhodamine 6G dye. The energy is re- released from the dye asas visible light photons
How to Reuse Thermacell Pads and Save $$$ SciTubeHD 2023-08-04 | In this video, I show you how to use a 42% concentrated solution of permethrin  to recharge your old thermacell pads for continued use. The method is extremely simple as you will see in this video. The method can be used over and over again for multiple uses of a single old pad. In the video, I test the effectiveness of the regenerated pads. I notice that it completely clears a very large area of mosquitoes and other pests. The application of the permethrin to the pads just takes a couple of minutes at the most. The pads are than ready to use. For the original video on how to refill the butane cartridges for continued, repeated use, please check my original video in the series over here: youtu.be/PH0b9KkvDkAPLEASE NOTE that the use of permethrin and allethrin in these pads is safest to use in well ventilated areas. Use in closed spaces is not advised.ALSO NOTE naturally occurring pyrethrins found in chrysanthemum flowers and structurally similar pyrethroids which are chemical analogs of pyrethrins are toxic to fish and can be toxic to cats
Making Insanely Reactive Piranha Acid SciTubeHD 2023-08-02 | Piranha acid is an extremely strong oxidizing agent and easy to make. It will destroy almost anything organic, including plastic. In this video, we demonstrate its reactivity. The end products of the reaction are carbon dioxide, and without any visible remaining detectable material.
Battery Recovery from Broken e-Scooter SciTubeHD 2023-07-31 | In this video, I demonstrate how to recover the battery from a broken escooter, as well as to get the battery working again if it is completely dead. I also demonstrate how to use the three phase motor in the scooter as a useful electricity generator.
Super Easy High Voltage Polarity Determination using Candle??? SciTubeHD 2023-07-22 | Super Easy High Voltage Polarity Determination using a candle
Argon in a Microwave SciTubeHD 2023-07-10 | In this experiment, microwave is favored into a round bottom flask at low pressure approximately 1 mm mercury. This is placed in microwave oven on high setting. The microwave is easily ionize the low pressure gas.Music by Benjamin Tissot, Bensound (Bensound.com).
Triboluminescent Mints SciTubeHD 2023-06-16 | Put the Lifesavers in a coffee grinder, go in a dark place, and grind them up and see what happens. This phenomena is known as a Triboluminescence.For a more detailed explanation of this phenomena, please check for my earlier video demonstrating this, and showing comparison with a different type of Lifesaver mint:Glowing Lifesaver Mintsyoutu.be/ngMlbzoD96U
Glowing Lifesaver Mints SciTubeHD 2023-06-15 | In this experiment, a coffee grinder full of Wintogreen lifesavers is used to demonstrate the phenomena of Triboluminescence. Grinding up the mints in the coffee grinder produces visible light, which can easily be seen in a dark room. However, the amount of light is insufficient to be visualized well with a digital camera, but can be seen with low light photography. We demonstrate this eerie bluish green light production in real time. Comparison is mage with regular peppermint lifesavers. We offer an explanation as to how the phenomena occurs. Please enjoy.
H180 HHO Torch Run SciTubeHD 2023-06-11 | In this short, output of a commercial HHO flame torch is demonstrated. This model H180 uses between 10 and 15% sodium hydroxide electrolyte, appears to be very efficient. This particular model generates 95 L of HHO every hour. It also has a built-in safety mechanism, bubble trap, and comes with different flame nozzles. The model is also extremely economical. Here’s a link to this:ebay.com/itm/125230483178?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=8grry7rrsqi&sssrc=2349624&ssuid=Z9ZBUuQvS8u&var=&widget_ver=artemis&media=COPYFor detailed setup and testing, please check my slightly earlier YT video:Detailed evaluation, H180 HHO flame torchyoutu.be/Uyb5wWUbBmE
Detailed evaluation, H180 HHO flame torch SciTubeHD 2023-06-11 | I bought this HHO flame torch (model H180) and decided to make this video for those interested in purchasing or are just curious about such a device. HHO has been in the spotlight for a number of years as a possible alternative energy source for vehicles and such vehicles have patently already been made by experimenters. The great thing about HHO is the combustion is extremely clean and pollution free.  the other advantage is you don’t need to haul around a portable gas tank. I bought the device simply because I was curious to see how hot the flame could get and how much HHO it would make. The model that I got is capable of generating 95 L of hydrogen and oxygen every hour. The unit which is model number H180 was purchased via EBay from the following site:ebay.com/itm/125230483178?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=8grry7rrsqi&sssrc=2349624&ssuid=Z9ZBUuQvS8u&var=&widget_ver=artemis&media=COPYIn this video, I demonstrate the set up and use of this device and show what it is capable of doing. I also added some tips that would be helpful for those that have just purchased this and do not know exactly how do use it or feel unsafe using it. Please feel free to PM me if you need any further details on my set up. 
Practical way to Epoxy-coat a Tesla Coil SciTubeHD 2023-04-07 | In the following video, I show you a practical way to use two component epoxy to create a durable, thick, smooth protective coat on the secondary of a Tesla coil. Coating cylindrical objects with two component epoxy is challenging. The reason is that the epoxy takes a while to harden, and during that time will simply drip off the cylindrical object that you plan to coat. Using a bench vice, drill, and variac, it is possible to build a jig to slowly turn the coil while the coating is hardening, and in that way, obtain an even coat. Please check out the video to see how this is done. If you like this and other videos in this channel, please consider subscribing and hitting the bell for announcements on future videos.The music in this video is copyright free and available from Bensound. The music title is Summer by Benjamin Tissot.
Low Frequency QCW-2 SciTubeHD 2023-03-05 | This 6 inch tall coil has the following specs: Secondary resonance 210kHz. Primary resonance 260kHz. DC ramp from 30 to 340V over 15 milliseconds. Maximum primary current at top of ramp 280A. Primary tank circuit 15 nF mica capacitors and 12 turns 0.25 inch copper tubing. For excellent description on how these types of Tesla coils work refer to Loneoceans site:loneoceans.com/labs/qcwOscilloscope trace of ramp versus tank current 1V peak to peak = 5Adropbox.com/s/88ndoyvb12ywc8z/IMG_9052.MOV?dl=0
Low Frequency QCW-1 SciTubeHD 2023-03-04 | This set up uses a QCW or quasi resonant double resonant Tesla coil.  The  resonant frequency of the secondary is 210 kHz. This is being excited by a primary tank circuit which runs resonant at 260 kHz. Ramped input voltage to this tank circuit generates the beautiful arcs that you see.  The duration of the ramp which increases from 30 -400 V is approximately 15 ms. As this secondary coil is resonating at 210 kHz, there is a lot of branching and gnarled appearance of the arcs. Effect is beautiful. Frequencies greater than 300 kHz give my straighter sword-like arcs.
QCWDRSSTC SciTubeHD 2023-03-04 | In the set up, we run a small Tesla Coil which has a 6 inches tall secondary coil which resonates at approximately 210 kHz with a primary coil set to resonate at 260 kHz. The primary is 12 turns and the capacitor for the tank circuit of the primary is 15 nF mica capacitor. The voltage being applied to the Tesla coil is 380V in the form of a voltage ramp. The ramp is approximately 10–15 ms. The transistor switches used in this set up on SKM 100 GB123D the peak current is set at approximately 300 A. In the set up we are hitting about 290A. Because of the frequency of the secondary less than 300 kHz, the sparks are gnarly and branched. Frequencies above 300 kHz would give long straight sword like sparks which will be my next project. These branched sparks-have a very interesting appearance. Sometimes the sparks are not well seen in the video as they are out on phase with the camera frame rate.
Fun with a QCW Coil SciTubeHD 2023-02-19 | This small test coil about 5.5 inches tall is being run using a straight ramped input voltage from about 30 V to 220 V DC. The driver board is a UD2.7c supplied by Loneoceans. The feedback and OCD transformers are wound 1:350. The Tesla tank circuit is made of mica capacitor 15 nF and 12 turns of quarter inch copper tubing connected in series. The current in the tank circuit is being monitored with a 100:1 current transformer and burden resistor such that 1V =10A. So on the scope 36V peak to peak = 18V 0 to peak = 180A peak. The sparks generated in this video are peak current 180A. The OCD is set to trip around 200A. This setup uses a full bridge inverter consisting of SKM100GB123D transistors. These are rated at 100A max continuous but will tolerate much higher currents if pulsed. The resonant frequency of the primary tank is 300 kHz. The resonant frequency of the secondary is 280 kHz. Secondary is being driven above its resonant frequency. The ramped buck signal is generated by an Arduino. This was programmed with ramp code supplied by Finn Hammer. The 32 kHz PWM signal from the Arduino is converted to an optical signal which is fed into an optoisolator- brick driver combo (2.5Amps driven with -12V neg relative to ground and +12V relative to ground pin ) to fully turn on and fully turn off a single SKM100 transistor switch at 32 kHz with the PWM pulsed input (5 ms to 15 ms per pulse). The body diode of the unused half of the SKM switch is used as the fast diode in the buck circuit. The optoisolator output is fed into this buck circuit which is basically an LC circuit. This uses an iron toroidal inductor wound with 50 to 60 turns 14 gauge wire (to give L100-120 uH) and 400 V film capacitor (20 uF ) to output a smoothed ramped DC into the BUS of the fullbridge inverter. The UD board is turned on optically via a second optical output from the Arduino at the same time that the ramp begins. The UD then turns off the gates or bases of the the fullbridge when the ramp ends. The Tesla coil LC tank runs at its resonant frequency via feedback from the 1:350 ferrite current transformer. Longer sparks can be obtained by increasing the duration of the ramp up to 15 to 20 ms. Typical DRSSTC Tesla coils usually run in the 100 uS range. ACW coils by running over 1000s of cycles instead of 10 to 20 are capable of generating very long arcs relative to the height of the primary!For more details check here:Building a QCW Tesla Coilyoutu.be/K1MDZsgNqJM
Amazing Mr Clean Shoe Hack SciTubeHD 2023-02-17 | In this video is a quick and easy hack to rejuvenate shoes and sneakers in minutes.
Hydrogen gas from a flameless food heating pack SciTubeHD 2023-02-13 | In this experiment receive how much hydrogen is generated from a flameless food, heating pack, and whether or not this hydrogen can be ignited. The results are quite surprising. These packs typically consist of a magnesium alloy with iron.  This activated form of magnesium reacts with water to form, magnesium hydroxide, heat, and hydrogen gas. We will attempt to burn this hydrogen as it is formed from the food heating pack.
Boiling Copper SciTubeHD 2023-02-11 | For detailed step by step build instructions, please check here:teslascience.wordpress.com/autotuning-9kw-induction-forge-version-1-2To use this set up with overcurrent protection, please check here:teslascience.wordpress.com/simple-and-effective-induction-heater-current-control-circuit
Inductive Scrap Melter SciTubeHD 2023-02-09 | Build instructions for this scrap metal melter are in the link. In this video we got the molten copper bubbling/boiling. This was helped along by surrounding the graphite melting crucible with an aluminum oxide blanket.Here is the build. Will add a BOM at some later time:teslascience.wordpress.com/autotuning-9kw-induction-forge-version-1-2
Inductive Scrap Metal Melter with link to build instructions SciTubeHD 2023-02-08 | In this video, I demonstrate an inductive metal forge for scrap metal. This can melt small lots of metal up to a kilogram.  In this video I demonstrate melting scrap copper metal. We use a graphite crucible to do this. Aluminum oxide blanket is used to insulate the crucible from the induction coil. For a detailed description on how to build this coil,  please check here: teslascience.wordpress.com/autotuning-9kw-induction-forge-version-1-2To set this up with current control, please check here:teslascience.wordpress.com/simple-and-effective-induction-heater-current-control-circuit
Firing up Tesla coils under Argon SciTubeHD 2023-02-02 | In this set of experiments, we explore the effects of operating high frequency Tesla coils including flame coils under an argon atmosphere to see if there is a difference compared with regular air. The results are surprising when comparing 0.5 MGz with a 16.5 MHz coil!
Tesla Candle Flame SciTubeHD 2023-01-30 | 16.5 MHz plasma candle. Class E oscillator circuit. IRFP250 running at 52 V DC
Mega Taser SciTubeHD 2023-01-06 | Mini High Voltage Tower of Power. In this video, we demonstrate a dual pole 9 stage Marx generator (total 18 stages) producing very high voltages at high currents (compared with devices, such as van der Graaf generators and Wimshurst machines which generate high voltages at much lower currents).A much larger version of the same device was demonstrated in my last video and the science behind how it makes high voltage is was also discussed. To see that video, please click here:Making a giant static electricity toweryoutu.be/SD6SA1kPbiY
