This very low current circuit was found in the April 1995 issue of Electronics Now magazine. The circuit operates at voltages from 6.5 to 10 V.
This circuit triggers a remote doorbell when the phone rings. The circuit is for the 110 V mains...
This circuit was found in an ancient American documentation. With it is possible to double the...
This 555 IC circuit was found in the November 1994 issue of Radio Electronics magazine. The...