Flasher CA3130 (CB22004E)

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

One Transistor High Power Switch (CB990E)
This circuit can handle 25 A unde a 32 V voltage using a hight power old transistor. This...
Telephone line monitor (CB10149E)
We found this circuit in a 1980s publication on telephony. The circuit uses an integrated...
Photo Astable Multivibrator (CB507)
The frequency of the square signal produced by this circuit depends on the light falling onto the...