This 5V power supply with a 1.5 to 3 A current was found in Maxim documentation from the 90s. The integrated circuit is the MAX741D.
This circuit is from the 1983 Intersil Databook. The circuit operates on a 9 V battery and has a...
This circuit, from a 303 Circuits from the 90s, uses a telephone pickup coil as a sensor to...
This circuit came out in a Popular Electronics from December 1995. It is a Wien bridge...