Found in a Popular Electronics from the 90s, this circuit generates signals from 2 Hz to 30 kHz in different bands. The circuit can be powered by voltages from 5 to 12 V, depending on the application.
This interesting idea was found in a 1983 publication and is very simple to analyze, according to the...
This “Half adder” circuit uses NAND gates from a 7400. The power supply must be 5 V. ...
Indicated for the protection of three-phase systems, this circuit was found in an American...