Solar timer (CB20498E)

This very low consumption circuit can be powered by a solar cell. The time indication is given by a microammeter.

Sonic defense (CB8238E)
This powerful sound emitter used in defense to intimidate people was found in a 90s Popular...
Sound Detector 741 (CB17585E)
This circuit can be used as part of a Vox project or as an input shield for a microcontroller that...
LM12 in Parallel Amplifier (CB14389E)
This 8 A high output power amplifier uses two National Instruments LM12s. The maximum capacity of the...