Flasher CA3130 (CB22004E)

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

Thermostat (CB25467E)
We found this circuit in the June 1992 issue of Radio Electronics magazine. The sensor is a common...
Positive to negative CMOS converter (CB8854E)
This circuit converts a positive CMOS supply voltage to a negative one. We found it in a 90s...
Baxandall with CA3140 (CB11981E)
This tone control was obtained from the CA3140 datasheet, originally created by RCA. The CA3140...