This detector uses an unusual sensor today. The circuit is from an 80s documentation. Its sensitivity is 10 ppm. The transformer has two secondary voltages.
When the equipment powered by the SO1 socket is turned on, the SO2 socket is automatically...
We found this voltmeter in a 1977 Radio Shack documentation. The integrated circuit can be the...
This circuit was found in a 1994 publication. Its purpose is to time the operation of a welder (or other...