Two sensors are used in this simple remote-control circuit, one to switch on and one to switch off the relay. The circuit is from 1986 documentation. The transformer has 12 V of secondary.
This interesting circuit appeared in the April 1952 Radio Electronics magazine. The circuit is...
With the development and availability of small LCD screens for automotive use, especially in...
This circuit was found in a 1981 documentation. The circuit produces intermittent beeps serving two...