The movement of the LEDs in this circuit mimics the back-and-forth movement of a pendulum, making it suitable for clock projects. The circuit is from a Radio Electronics magazine from May 1978.
This circuit is from a Radio Electronics magazine from August 1974. It used one of the first...
This circuit was found in an English magazine from 1973. The magazine no longer exists, but the...
This circuit for measuring very low currents was found in an American documentation from the...