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.
This unusual audio amplifier configuration was obtained in a 1974 documentation. The PNP...
This circuit was obtained in a 1990 English magazine. The circuit can be assembled with equivalent power...
Found in National Semiconductor documentation, this logarithmic meter is powered with a voltage of only...