- Posted by fatboyslim on Friday 24 April 2009 - 09:38:03
looks like something in schematic is dead( maybe tl494)
try to replace it with new tl494
- Posted by fatboyslim on Friday 24 April 2009 - 09:38:03
what frequency are you running it at? It could be that when you changed the tl494 chip the frequency got messed up. It should be running at around 1...
- Posted by fatboyslim on Friday 24 April 2009 - 09:38:03
OK thanks. Ill try replacing the part and tell you how it goes. are there anyother parts that have the possibilty it was damaged so i could replace it...
- Posted by fatboyslim on Friday 24 April 2009 - 09:38:03
Pin 10 should also be shorted to pin 9 in order to parallel the internal drive transistors.
- Posted by fatboyslim on Friday 24 April 2009 - 09:38:03
The schematic has something wrong. Pin 9 of the TL494 is the emitter of a driver transistor, that has the collector on pin 8. There is nothing in the ...
- Posted by indiana on Thursday 02 April 2009 - 04:37:20
The power part should really be completely isolated from the control part so you can ground the control part to earth, but it is not completely necess...
- Posted by indiana on Thursday 02 April 2009 - 04:37:20
like so?{e_FILE}public/1238657889_2009_FT66912_plasma_speaker_better_output_.png
- Posted by indiana on Thursday 02 April 2009 - 04:37:20
Yeah, if you open a few computer PSU's or other PSU's, you will see that the part after (the low voltage) the transformer are complete isolated from t...
- Posted by indiana on Thursday 02 April 2009 - 04:37:20
Just one thing the gate resistors should be 22 ohms. Otherwise it looks OK to me
Edit: You should remove the "ground plane" on the HV section as ...
- Posted by indiana on Thursday 02 April 2009 - 04:37:20
If you can, make the traces slightly larger in the hv section.
