This circuit is from an article that teaches how to assemble it in the magazine Electronics Now from July 1993. It uses a liquid crystal display module from the time with 3 and a half digits.
This circuit was found in a National Semiconductor manual that is now a Texas group company. The...
This switch or band selector for receivers was found in a Popular Electronics from the 1990s. The...
L1 is the secunday wound of a common power transformer with voltages between 6 and 12 V and...