NE602 Crystal Oscillator (CB26005E)

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

Automatic gain control for audio (CB20640E)
This circuit was found in an American publication called Ham Radio. The circuit uses still current...
Alarm Siren 4001 (CB24363E)
This two-tone alarm siren was found in the January 1975 issue of Radio Electronics magazine. The...
Pulse Generator (CB5918E)
This circuit makes use of a transconductance operational amplifier. It generates signals with TTL...