29 Apr '12, 12pm

op amp audio amplifier circuit help/suggestion

Quote from: winner10920 on April 21, 2012, 12:30:14 AM Im trying to make a simple amplifier im using an lm324(which may change I think I might have blown it up) on a 0-12 supply and with a 460ohm resistor from the input to the - in, and a 10k pot to the the output, + in is gnded I had it working(very crudely) so I figured id add a voltage offset and just have a capacitor after my transistor to get my nice ac to.a 8ohm speaker however I put a 10k pot and had the leg go to the input before the 460 ohm resistor and it didn't do anything other than kill the signal at both ends of the pot not biasing as I thought I added that last part and know Im not getting even the crude amplification( like I said probably blown being its one am and I think I shorted something somewhere by accident), anyway im giving up on the crude design I know there are tons of op amp circuits on the web ...

Full article: http://arduino.cc/forum/index.php?topic=102323.0

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