This small audio amplifier circuit in complementary symmetry was found in the 1974 Mullard Databook. The output pair can also be the BD135 and 136.
This tone control was obtained from the CA3140 datasheet, originally created by RCA. The CA3140...
This low current regulator uses an operational 741 and a BC548 general-purpose transistor. The...
This game of speed or who is the fastest uses a digital display. The circuit was found in a 1991...