Found in a Popular Electronics from the 90's, this circuit is used to recognize the frequency of a modulated infrared signal. The LM567 circuit must not be supplied with voltages above 9 V.
This circuit was obtained from Popular Electronics from June 1978. It doubles the input DC...
This is the basic configuration of many LM339 manuals, as a comparator with hysteresis. The font...
This is an interesting solution for intelligent load control using a cable and a diode array to...