This circuit automatically turns off small battery-powered devices after a certain amount of time, saving battery life. We found it in a Popular Electronics from the 90s.
We found this circuit in a Popular Electronics from 1992. It consists of a voice scrambler used in...
This dual power supply for power amplifiers with a voltage of 40 V and a current of 3 A was found...
Found in a publication from the 60's, this power supply has no regulation, but only current...