This CMOS circuit for LED displays is from a Radio Electronics magazine from February 1989. The circuit has an enable pulse for storing the value shown on the display.
One of the first transistor amplifiers with transformerless output but using a 45-ohm speaker. This...
Found in Radio Electronics from the 90s, this circuit uses a thermistor as a sensor that can have...
The circuit presented is from an old magazine having been translated and published in a national...