This interesting digital counter with relays with complementary outputs was found in the Radio Electronics magazine of October 1961. The supply voltage is in accordance with the relays used.
This circuit was found in an article in Radio Electronics magazine. The issue is from July 1992...
This simple circuit indicates, through an LED, when the water level of a filter (or other kind of...
This Hall sensor circuit is intended to isolate an audio signal applied through a coil. The...