This 6-transistor commercial radio with 6 V supply was found in a Japanese publication from the 1960s. The circuit is a commercial superheterodyne with 150mW to 200mW of battery powered output.
This is the traditional configuration of an AC amplifier using the 741 integrated circuit. I found...
This article is old, from 1994. But, for those who have an old PC and want to use a joystick from...
This simple circuit indicates when the two channels of stereo equipment are balanced. The diodes can...