Flasher CA3130 (CB22004E)

Found in an English documentation from 1977, this flasher or pulser circuit drives an LED. The frequency depends on C2.

90V x 10 A Amplifier (CB8951E)
Based on National semiconductor power operational amplifiers, uncommon today, this circuit...
Astable Audio Oscillator (CB11993E)
This circuit produces an audio tone on the speaker or magnetic capsule. Rx must be such that added...
Micro Buzzer (CB20336E)
In the figure we have a simple way to produce tone in a piezoelectric transducer. The frequency depends...