Lamp control (CB21962E)

This 60's shield or driver employs germanium transistors. The circuit is from a 1960 Gernsback documentation.

1 to 999 Minutes Programmable Timer (CB4436E)
We found this interesting timer circuit or CMOS timer in a 1988 publication. The circuit is still...
Tens Electrostimulator (CB17101E)
This circuit was found in a 1997 documentation. The signals are adjusted in a double 555 (556) and the...
Micro FM Transmitter on 220 V (CB11847E)
This circuit is from a 1993 Italian magazine, but it can be easily assembled today. For 110 V,...