In the figure we have a way of receiving ultrasonic signals of a single frequency using a PLL 567. The circuit is from Radio Electronics from November 1985.
This is perhaps one of the first capacitive discharge ignition circuits published in a magazine. It...
In fact, this circuit consists of a presence simulator for sites and farms that, after dark,...
This boost amplifier was found in a Popular Electroniics from the 90s. The circuit operates up to...