Stereo preamplifier TDA3410 (CB21937E)

Taken from the 1982 SGS manual on integrated circuits, this preamplifier was used in commercial equipment at the time.

Thermostat (CB24644E)
We found this multiple thermostat circuit in July 1980 Radio Electronics magazine. It uses...
Microphone Preamplifier (CB10228E)
This circuit is from a 1986 Revista Española de Electrónica. It consists of an amplifier with...
Flip Flop High Current (CB6619E)
Suggested by a 1968 Philips documentation this Eccles Jordan rocker as it was called can operate...