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Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Finished this some time ago, and now posted it
So basically just PLL DWSSTC II driver -> TC4420 -> IRFP240. The sparks aren't so impressive, but hey, you can't get everything: this thing is running off a 12V 1A wall wart!
Here's a small video: ]small_tc.wmv[/file]
And here you can see my obvious asthetics skills
There is an interrupter in the picture, but it's not working. No audio modulation implemented. I'm going now to make a small DRSSTC, because I got bored with SSTC's.
Registered Member #1408
Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
Would you happen to have a cleaner copy of the schematic? Id like to try that as the parts are pretty much free & it looks fun. The hand-drawn schematic is confusing in a few places.
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
This coil was just an early prototype, and I don't like developing it any further. I've started a new coil, and perhaps I will try some higher voltage with it. However, if I take the coil with me somewhere, I certainly won't like to take also a heavy bench supply, almost bigger than the coil itself
BTW, I did a little measurement and found out that the coil draws around 0.6Amps. Then I measured the voltage, and the multimeter showed only 3 volts with the 12V wall wart. Could the DMM be picking interference from the coil? With no load the wall wart output voltage is 16V.
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Those would be pretty impressive streamers for just 1.8W of input, even less after losses. Check what the voltage drops to with a 0.6A load if you want to be sure. I don't think the IRFP240 would turn on with just 3 volts anyway, so it's probably just the multimeter.
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12V PLL coil...
