stl_jones@yahoo.com
New Member
I have been working on a circuit that lights up LEDs when the bass hits.
Here are the steps in my circuit.
1) Class A amplifier
2) Op Amp
3) Sallen Keys low pass filter
4) Inverting Amplifier
5)FET
I thought I had finally got it working, but after putting it into a box, I noticed that after 1-2 minutes, the cutoff frequency becomes so low that the LED no longer light.
I have been trying to figure this out for hours, and the only thing I have come across is that if I connect one of the junctions in the filter to ground with my finger, the circuit will work again for another 1-2minutes. Any help would be greatly appreciated. -Alex
Here are the steps in my circuit.
1) Class A amplifier
2) Op Amp
3) Sallen Keys low pass filter
4) Inverting Amplifier
5)FET
I thought I had finally got it working, but after putting it into a box, I noticed that after 1-2 minutes, the cutoff frequency becomes so low that the LED no longer light.
I have been trying to figure this out for hours, and the only thing I have come across is that if I connect one of the junctions in the filter to ground with my finger, the circuit will work again for another 1-2minutes. Any help would be greatly appreciated. -Alex