“Driverless” Tesla Coil

[@Magneticitist]

After some thinking about it I have to appreciate this approach if only to be able to easily run CW plasma without worrying about switch heating. It seems easier to set up than a Class E.

[@BrianDhvTinkerer]

It’s my favorite coil set up and by far easier to set up a compared with a class E Tesla coil. - it will run nonstop for ages without any heating of the switches.

[@BrianDhvTinkerer]

It really is a lot easier than class E. Tuning is way easier too.

[@solarroller09]

Amazing😃❤

[@Exotic_Chem_Lab]

Very cool ❤

[@BrianDhvTinkerer]

Thank you!!!

[@thathalfthaiguy]

Awesome video! Looking forward to the tuning video.... about what frequency was your Tesla coil running? Thank you

[@BrianDhvTinkerer]

250-280 kHz

[@BrianDhvTinkerer]

Just measured it this morning. Resonant freq is 277 kHz. I was basically 2 turns on my primary which was driving up the current. I reduced the resonant cap from 150 nF to a 100 nF cap. Now I’m out at 3 turns and unit is running great!

[@thathalfthaiguy]

@@BrianDhvTinkerer thank you for the update! Loving this topic

[@ChrisMcNeely]

sweet

[@BrianDhvTinkerer]

Thank you!!!

[@gaynzz6841]

Running this on AC will destroy the FETs. Not sure I understood you correctly. You meant halfwave rectified?

[@willemwallaby]

He mentions a “12 volt wall adaptor” in his introduction. So- assume something like a generic 12v 2A wall wart.

[@willemwallaby]

He mentions half wave rectified AC further into the video as well.

[@BrianDhvTinkerer]

Yes, exactly exactly. What passes through the diodes is the positive half of the AC sine wave. The upwards slope has a ramping effect on output resulting in spark growth like in a QCW coil

[@RogerWsVideo]

I got to see this coil run at the Tesla fest and I am working on making one of my own. I just got one question. Do the 100 ohm 10 watt resisters really have to be 10 watts? It seems like 2 watts would be plenty.

[@BrianDhvTinkerer]

Great to hear from you. No that is a mistake. It should actually be 100 Ohm 5W ceramic resistors 10W won’t fit on the board.

[@BrianDhvTinkerer]

One more thing, if you’re gonna make the coil the same size as the one I had at the Tesla fest ( 3 1/2 inches magnet PVC and 6 inch tall coil using 34 gauge wire, it’s best to use 100nF and not 150 nF capacitor. I just used quarter inch copper tubing to make the 5 inch diameter primary coil. I used Keftan tape to keep the coil the same height along the circumference. You can also cut up pieces of tygon or silicone tubing and put that spaced around the coil to prevent any of the lturns touching and shorting each other.

[@yelectric1893]

Could this principle work up to 1Mhz for HFSSTC's?

[@BrianDhvTinkerer]

The highest frequency we’ve been able to operate these is 500 kHz

[@polygon2744]

It is possible to make this a DC output Tesla Coil?

[@BrianDhvTinkerer]

Yes absolutely. Instead of supplying AC just put in DC 0-60V and it will work with a silent hissing sound of the DC plasma. Adding a class A amplifier in the neg rail of the DC input will allow AM musical output

[@polygon2744]

@@BrianDhvTinkerer Thank you for the quick reply. Where can I find the circuit diagram and board design? I looked on your links and could not find it. Thank you again.

[@BrianDhvTinkerer]

@@polygon2744 you can download the Gerber files and BOM here: Gerber files for making your own board from JLCPCB can be downloaded here: drive.google.com/file/d/1LT99xMJM3GokFdwl1bjIvzCh1FI0mYt3/view?usp=sharing Bill of materials (BOM) can be downloaded here: drive.google.com/file/d/1e315jqtna1GlXcUyhYC_6J7t62630wV5/view?usp=sharing

[@polygon2744]

@@BrianDhvTinkerer Thank you very much!

[@noelandrew3600]

can you provide a download link?

[@BrianDhvTinkerer]

i put the download links in the description. You can get them here: Gerber files for making your own board from JLCPCB can be downloaded here: drive.google.com/file/d/1LT99xMJM3GokFdwl1bjIvzCh1FI0mYt3/view?usp=sharing Bill of materials (BOM) can be downloaded here: drive.google.com/file/d/1e315jqtna1GlXcUyhYC_6J7t62630wV5/view?usp=sharing it takes 4 days to get the boards made. One of the most fun projects I have done.

[@BrianDhvTinkerer]

Bill of materials doesn’t include the two IRFP260N MOSFETs. IRFP 460N would work just as well.

[@SanjanaRanasingha]

❤🎉

[@BrianDhvTinkerer]

Thank you!!!

[@SanjanaRanasingha]

@@BrianDhvTinkerer 🤩