This circuit was found in American documentation from the 1980s. The integrated circuit used is a voltage comparator of the time. Modern equivalents can be tested.
High performance 16 A Buck regulators capable of operating at 2.7 to 4.8 V voltages and 0.25 to...
This circuit is from a Radio Electronics from February 1959. The circuit has a speaker output and...
This circuit consists of a single Hartley oscillator using a bipolar transistor that can generate...