Adjustable reference (CB21539E)

This circuit was obtained from an old American publication. The uA702 is a differential amplifier and the diode is a zener.

Transistor gain meter (CB21952E)
We found this circuit in a Gernsback documentation from 1960. The circuit is intended for...
Basic Monostable Using Transistors (CIR816E)
The load used in this experimental circuit is a small incandescent lamp but it can be replaced by...
NOR function with Relay (CB19766E)
In the figure we have the way to implement an inverter using a relay. The contacts used are NF and...