The 1: 1 transformer on this circuit found in a 1967 Electronics World can be wrapped around a small ferrite rod. The circuit operates with 600 to 6 000 Hz control signals.
Published in Radio Electronics magazine in March 1963, this circuit uses 4 transistors of the...
The LM11 operational amplifier is not common today. The circuit was obtained in the Linear...
This project was found in a 1988 documentation. The circuit intermittently activates an aquarium...