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Registered Member #1361
Joined: Thu Feb 28 2008, 10:57AM
Location: Cairns, Australia
Posts: 305
I had one of the DRSSTC kits from "aautomation" on ebay, and decided it'd be cool if it had PC control. I looked into the circuit a bit, and it was actually amazingly simple to add it.
It uses an Arduino to control it, and the Arduino is controlled thru a VB app on my pc. The VB program has a single fire button, fire and stop buttons, and a BPS rate control.
Unfortunately the charging circuit (Stepup transformer) cant handle charging the caps fast enough for the high BPS rates, so the sparks drop in size and start sounding more like 50hz. Nut much I can do about that for now until I build a new converter that can handle more power.
The coil runs @ 400uS ontime, and the BPS is controlled by adding delays into my Arduino code. I have only gone to 250BPS for now as I was unsure if it'd work at all.
I plan to add audio modulation, though I need to find a program to convert something like a MIDI file into a bunch of BPS rates (Frequencies and breaks I guess), and feed them to the TC. Thats once I have figured out how to charge the caps faster.
Anyway, here's a video of it:
And a weird lookin spark, which seems to be different when running on the uC instead of the internal circuitry. Maybe the ontime is lower than specified?
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DRSSTC Kit - Computer control
