Found in an EEE from 1970, this circuit supplies a voltage of 12 V DC x 10 mA current from the power grid. The NOR or NAND port used is TTL.
This circuit is from a documentation from the 60s. The circuit can be built with transistors like...
This circuit was found in a Radio Electronics from May 1965. FETs are from the time, but the...
This turntable filter was found on an 80's Elektor. The circuit makes use of operational features...