This digital to analog converter circuit was found in the March 1980 Radio Electronics magazine. The power supply should be symmetrical, and the digital controls can be TTL.
Found in a Popular Electronics from the 90s, this circuit has a configuration that has been widely...
This indicator circuit used and game machines (arcades) to indicate that the machine is being...
Found in old documentation, this circuit uses an SCR like the TIC106 that must be equipped with a...