NE602 Crystal Oscillator (CB26005E)

This oscillator reaches 50 MHz with an overtone crystal. The circuit is from Electronics Now magazine from February 1997.

Capacimeter (CB4472E)
This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...
4-way logic test (CB8908E)
This circuit was found in a 90s Popular Electronics. The circuit uses 4 bicolor LEDs to indicate...
Electronic Metamorphosis (CB16781E)
This circuit causes the light of a bicolor LED to change when it is turned on. The time of...