Microphone preamp (CB22043E)

This preamp was found in an old English publication. Any usage JFET can be employed. The output is high impedance.

LM1875 Non-Inverting Composite Amplifier (CB26268E)
Found in a 1990s Electronics Now, this circuit uses a period-specific integrated circuit that...
Digital Dimmer (CB16771E)
We found this dimmer in a 1994 publication. We can control the speed of an engine through the...
Light controlled oscillator (CB7896E)
Found in a Popular Electronics from the 90s, this circuit has a configuration that has been widely...