4066 Latching Touch Switch (CB25241E)

This circuit was found in the November 1989 Radio Electronics magazine. Power supply depends on the application.

Front detector (CB9688E)
Found in American documentation from the 90s, this CMOS circuit detects the source of a signal and can...
12 To 9 V Converter with Protection (CB5006E)
I found this circuit in an old English magazine from 1981, but it can still be assembled with some...
Triangular and sawtooth generator (CB21447E)
This circuit was obtained from a 1969 Electronic Design. Transistors admit modern equivalents. The frequency...