Found in a Popular Elecronics from the 90s, this circuit appears in other versions in this section and on the website. The circuit draws one of 10 LEDs and has a sound effect produced during the draw.
Unlike the previous circuit, this circuit has a low impedance input. The components can be changed to...
Found in Mallory documentation from 1968 this circuit uses an integrated circuit from that time. The...
The purpose of this circuit is to provide a constant current to an experimental electromagnet. The...