Asymmetric bistable (CB21812E)

This circuit is from the 1960 Mullard transistor manual. The transistors are germanium from the time.

Photosensitive power circuit (CB25193E)
This circuit can be used in alarms by activating a relay or a current load that depends on the...
LM3900 Non-Inverter Comparator (CB14207E)
The circuit given below was found in the National Semiconductor Linear Applications Handbook. The...
Phototransistor Currente Control (3) (CB14641E)
The current of this circuit is determined by a PNP transistor. The circuit is suggested by Texas...