Comparator with AND gate (CB9407E)

This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the critical component of this circuit.

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Strobe (CB19291E)
This xenon lamp circuit is from old documentation. The trip transformer has a 1: 1 turn ratio and...
2 kHz Alarm (CB4877E)
This simple alarm with integrated CMOS sounds a piezoelectric transducer when the sensor circuit...
4060 Crystal Oscillator with Divider (CB4620E)
In the figure we have an interesting circuit for those with a project that requires a sub-multiple...