Found in American documentation from the 90s, this circuit has the signal frequency determined by capacitors from C4, C3, C2 and C5 selected by digital switches.
This simple circuit indicates if the polarity of a load is reversed when it is connected to a...
The circuit shown in the figure below is suggested by ON Semiconductor (www.onsemi.com), based on...
Here we have an interesting circuit found in a 1981 publication that causes two LEDs to flash...