Micro metronome (CB20743E)

This simple CMOS metronome circuit can be mounted in a small box, providing both sound and light sources.

20 MHz Colpitts Oscillator (CB5122E)
This circuit can generate signals in the range from 1 to 20 kHz, depending on the crystal. The...
Moisture Detector (CB22075E)
The basis of this circuit is an LM380 that drives a speaker that emits sound when moisture is...
555 1 kHz oscillator (CB22367E)
Using the ICM7555, CMOS version of the 555, this circuit produces a 1 kHz signal. The circuit has...