Capacitive Relay (T1527E)

Found in Popular Electronics from August 1956 this sensitive two-tube relay is powered directly from the mains power supply.

Complementary Oscillator (CB4372E)
This circuit was found in an English magazine from 1973. The magazine no longer exists, but the...
OLED Display Modules (COM180E)
January 2017 - Mouser Electronics is introducing new, ultra-thin Vishay Displays OLED modules. The new...
Asymmetric bistable (CB21812E)
This circuit is from the 1960 Mullard transistor manual. The transistors are germanium from the...