We found this circuit that protects speakers against current surges that occur when the amplifier is turned on in a Radio Electronics from August 1991.
This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the...
This conventional LED flasher circuit has a configurable multivibrator configuration with PNP...
This 1969 Popular Electronics circuit was based on the then recently released BC109, today with...