Beacon with instrument (CB20495E)

This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by solar panel from 1 V.

Differential Multiplexer (CB5352E)
This circuit was found in an ancient American documentation. The integrated circuit is of the time...
Digital Multimeter (CB4477E)
The basic integrated circuits of this 1988 multimeter are no longer very common today, but if...
Windshield wiper timer (CB6052E)
This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and...