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Results 371 - 380 of 3952 in Forum

High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
You can use a gate drive transformer, but why? You only need to do that when you want to drive a high side mosfet. The 555 is not capable of adeq...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
ok so im waiting on another flyback because the one i have has a ferrite core that is to close to the plastic housing to wrap magnetic wire around,...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
You can use a gate drive transformer, but why? You only need to do that when you want to drive a high side mosfet. The 555 is not capable of a...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
What would? Using a proper gate drive will keep the 555 from getting warm and may reduce mosfet heating due to it spending less time in the linear ran...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
IT WORKS!!!! I re-built the circuit for the 555 and it works now! I think i just had my MOSFET hooked up wrong. But I do have arcing between the pins ...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
ok, so i insulated all the pins on the bottom so no more arcing, and the sound quality is pretty darn good. I heatsinked the mosfet with an old proces...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
ok, so i insulated all the pins on the bottom so no more arcing, and the sound quality is pretty darn good. I heatsinked the mosfet with an old pro...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
Increasing the voltage will also increase the load on the FET drastically. I literally had an icecube sitting on top of mine and it still blew when ...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
You'd get more volume if you put a voltage amplifier stage between your sound source and the ac coupling capacitor. A 741 configured for a gain of m...
High Voltage | 555 Timer Plasma Speaker
Posted by Chip Fixes on Saturday 26 March 2011 - 02:50:01
The greatly increased heating is due to the FET absorbing the very high voltage spikes created which increase as you increase the supply voltage. If y...

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