Electromechanical Counter (CB21682E)

This photoelectric circuit from a 1960 publication uses a 6.3 V electromechanical counter, common at the time.

Pulser (CB12114E)
This circuit intermittently activates a relay. It was obtained in a 1980 publication. In fact, we...
Benchtop Amplifier (CB6978E)
Suggested by a Popular Electronics, this small amplifier that has a detector to follow RF...
Regulator with Slow Turn On - TL317 (CB1248E)
This source gently applies the voltage to the load, causing it to rise slowly, thus avoiding...