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1
Dual Resonant Solid State Tesla coils / Re: Drsstc 3
« Last post by oneKone on Today at 02:28:27 AM »
Cheers for the heads up dan, I'll swing past Jaycar and get some heatsinks! As for pulse skipping I haven't really looked into it so I'll have a read on your thread.

Cheers for the encouragement mads. You've got the nail on the head! Thankfully buying the main components is over! Just remembering all the smaller components now! I can semi relate with your current circumstances, for me it's repainting and reflooring my house... And I also decided to paint one of my car's in my garage..... Something now I wish I hadn't started! Tbh I still find it amazing you find the time to be a family man, Goto work, renovate a house, run a forum and post YouTube videos...

2
Dual Resonant Solid State Tesla coils / Re: IGBT selection - TO-247 or minibrick?
« Last post by Garyf on September 18, 2018, 05:51:35 PM »
I've been away from the Forum and my workbench for awhile, but I occasionally check aliexpress for more powerful TO-247s.  The IXXH100N60b3 came to my attention recently with an Icm of 480 amps.  But no diode. 
So would a unidirectional TVS diode work?  For example 5KP5.0A is good for a 550 amp pulse, 1ps response time.

The rating is for a single pulse, and it's usefulness for freewheeling service is not clear to me.
3
Electronic circuits / Re: Theremin based on the stm32f103c8t6 and bluepill, stm32duino
« Last post by profdc9 on September 18, 2018, 05:00:57 AM »
I would consider using the STM32F103Rx series if there was a convenient, cheap board like the bluepill you could buy.  The bluepill is $3 on ebay.  It's still much cheaper to use that and a MCP4921 (1.25 USD) than almost any other dev board.  The tinnitus32 theremin (https://github.com/gerdb/tinnitus32) - by the way this is an AWFUL name for a device that is supposed to sound pleasant - uses the STM32F4 but isn't terribly convenient because it doesn't really have a PCB to integrate everything into, though such a thing is possible for the STM32 discovery board.  A form factor like the bluepill or Arduino Nano is very convenient for integrating into projects unlike a whole dev board, though a dev board could be integrated into a project like the OpenTheremin does.

Dan

4
Electronic circuits / Re: Theremin based on the stm32f103c8t6 and bluepill, stm32duino
« Last post by futurist on September 17, 2018, 08:57:40 PM »
Nice job! Do you think it would be possible to omit external DAC if using STM32F103Rx series? That would also be a nice upgrade to gaudi's opentheremin v3
5
Electronic circuits / Re: Hacking the IKEA 2000 Watt induction stove (5 parts)
« Last post by Mads Barnkob on September 17, 2018, 11:20:53 AM »
How to measure the watt of the inductor is that Vout(rms)*Iout(rms)?
How to get the every set’s power

I think you can find some help in this presentation: "Analysis and Design of Quasi Square Wave Resonant Converters" https://www.onsemi.com/pub/Collateral/TND348-D.PDF
6
Dual Resonant Solid State Tesla coils / Re: Drsstc 3
« Last post by Mads Barnkob on September 17, 2018, 11:17:23 AM »
Looks good, solid choices and careful component picking, it takes time to get everything at the right price :) If we had the money to blow, we would just pay someone else to build it wouldn't we?

Do not feel bad about slow progress, I spent 4 years to complete my large DRSSTC. Right now I really feel the time disappearing with a house to restore and 2 kids. Just hang inthere!
7
Spark gap Tesla coils / Re: mmc capacitor banks
« Last post by Mads Barnkob on September 17, 2018, 08:52:32 AM »
Hi Oakley

Those are the "good and old" "Panasonic" capacitors, the reason I write both in situation marks is that they were the best back then, as pulse film capacitors was out of the reach for the amateur and it used to be Panasonic that made them, that is hardly the case anymore :)

I once found the specs and added the panasonics to my MMC calculator, so take a look there: http://kaizerpowerelectronics.dk/calculators/mmc-calculator/

Look at the Panasonic ECWH16333, Panasonic ECWH16473 and Panasonic ECWH16563: http://kaizerpowerelectronics.dk/theory/good-mmc-capacitors/
8
Electronic circuits / Re: Hacking the IKEA 2000 Watt induction stove (5 parts)
« Last post by aq62386238 on September 16, 2018, 03:31:06 PM »
How to measure the watt of the inductor is that Vout(rms)*Iout(rms)?
How to get the every set’s power
9
Dual Resonant Solid State Tesla coils / Re: Drsstc 3
« Last post by profdc9 on September 16, 2018, 04:34:36 AM »
Nice work populating the board.   Just make sure you put heatsinks on the voltage regulators, or they will overheat.  Let us know how it goes.  You can even try the ud29 board if you want to try skip pulse.   It's almost the same board, but with only a handful of extra components.

BTW I put the DRSSTC PCB pack up on github

https://github.com/profdc9/DRSSTC-PCB-Pack

Enjoy,

Dan
10
Electronic circuits / Theremin based on the stm32f103c8t6 and bluepill, stm32duino
« Last post by profdc9 on September 15, 2018, 10:55:33 PM »
Hello,

I made a theremin based on a STM32 microcontroller (the $3 bluepill).  You can see me play it in this video

/>
The theremin as you can see is quite sensitive.  I actually put a fiber optic output on the board so I can program it to be an interrupter for a DRSSTC.

The parts are very inexpensive and the circuit is fairly simple.  The PCB, schematics, and the software are on a github

https://github.com/profdc9/MCTheremin

If you want to try to build it let me know.  Enjoy!

Dan


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