We found this circuit in a 1963 Radio Electronics. It can be used for remote control. The frequency depends on the coil and the power is supplied by a single battery.
Using a DAC038 IC this circuit is from Radio Electronics from May 1983. The circuit must be...
This circuit with traditional discrete components was found in a 1990 documentation. The circuit can...
This circuit is from an American 80's documentation. The circuit indicates when the voltage of a 9 V...