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 digital indicator circuit was found in the June 1988 issue of Radio Electronics magazine. The circuit...
This powerful amplifier with 2N3055 transistors at the output provides a few tens of watts rms on a...
This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of...