FET Colpitts Oscillator (CB22394E)

This ultra-simple circuit has the frequency determined by the LC network. Any general purpose JFET can be used.

741 tester (CB20888E)
This circuit allows the testing of integrated circuits of type 741 (operational amplifier) such as...
Sophisticated Audible Logic Probe (CB13789E)
The circuit presented is a documentation for radio amateurs from 1978. Implemented with common CMOS...
Simple Audio Mixer (CB12330E)
I found this circuit in an old document from 1981. The circuit can be implemented today with the...