This circuit is from a 1977 Signetics integrated circuit manual. The output transistors can be BD136 and BD237 and the symmetrical supply can be from 6 to 12 V. The voltage gain is 10.
This circuit was found in an 80's Radio Electronics. The circuit multiplies the frequency of a low...
This circuit can be interleaved between guitars and guitars to give the fuzz distortion effect. The...
A complete test for opto-couplers can be made using the circuit Bellow. The function generator...