100 kHz Oscillator (CB22379E)

This is the single-sourced version of the previous oscillator. Frequency can be changed by changing C1.

Piezoelectric Transducer Power Oscillator (CB15911E)
This circuit is suggested by National Semiconductor and is based on the LM3900, a quadruple...
Amateur Radio Amplified Microphone (CB18781E)
This circuit for the radio amateur also includes the beep effect when changing. The circuit is...
Car alarm (CB23933E)
We found this circuit in Radio Electronics from October 1968. The circuit drives headlight bulbs...