This high current regulator with low voltage drop was found in the datasheet of the used integrated circuit itself. The transistor accepts an equivalent and must be provided with a heat sink.
This non-inverting AC amplifier was found in the February 1990 issue of Radio Electronics...
This sensor circuit for a small robot was found in a Popular Electronics from the 90s. The circuit...
This direct detection circuit was found in a 1986 documentation. The output is of low power, but...