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Biggles · 25th Oct 2006, 12:58 pm

I have tried various experiments with these over the years and I found that as Ed says, to get any useable current at high voltages, the current drain at say 1.5V or even 9V can be quite high and require quite high capacity batteries, due to the I=W*V rule. Quite good fun to experiment with though. You'd be surprised at the emfs a little transformer can generate. I think there are dedicated step-up switching chips to try as well, but if I remember correctly, circuit layout can be quite critical to ensure max efficiency, particularly with the higher frequencies, and low primary voltages. Don't let this put you off though.

Biggles

25th Oct 2006, 12:58 pm	#7
Biggles Rest in Peace Join Date: Feb 2004 Location: Hexham, Northumberland, UK. Posts: 2,234	Re: compact HT generator idea I have tried various experiments with these over the years and I found that as Ed says, to get any useable current at high voltages, the current drain at say 1.5V or even 9V can be quite high and require quite high capacity batteries, due to the I=W*V rule. Quite good fun to experiment with though. You'd be surprised at the emfs a little transformer can generate. I think there are dedicated step-up switching chips to try as well, but if I remember correctly, circuit layout can be quite critical to ensure max efficiency, particularly with the higher frequencies, and low primary voltages. Don't let this put you off though. Biggles