This circuit provides a 5 V negative output with a maximum current of 1 A. The circuit is from the 1993 Linear Technology Applications and uses common components at the time.
This circuit was found in an Electronic Experimenter Handbook from the 90's. The coil can be...
This touch switch uses components that have easy-to-obtain current equivalents. The power supply...
This circuit is an excellent shield for microcontrollers and was found in the October 1987 Radio...