Flasher CA3130 (CB22004E)

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

Automatic headlight shutdown (CB7260E)
This circuit for automotive use was found in American documentation from the 90s. The circuit uses...
Fake alarm (CB24990E)
The flashing LEDs in this circuit simulate a working alarm and can serve as a deterrent to a...
Digital Capacitor Meter (CB17506E)
This circuit was found in a 1986 documentation and it may be difficult to obtain some of its...