In the figure we have 3 oscillators with logic gates that can be triggered by external logic signals. The circuits were found in the Radio Electronics magazine of April 1987.
Assembled with SMD components this circuit can be very small. The range is a few tens of meters. We...
With the circuit shown, obtained in a 1980 publication, a reed-relay is activated with a resistive...
This circuit is a shield for microcontrollers and computers drivind high power loads. In the...