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.
This monostable circuit, from a 1977 Radio Shack documentation, uses a 7400. The time is given by the...
Integrated LM108 and LM101A are used in this fast adder with low input current, figure. The...
This ultra-simple tester and component gauge lets you perform continuity testing and even evaluate...