This General Electric circuit was found in a 1964 documentation. The circuit triggers a relay when the sensor is activated. Trigger adjustment is done in a trimpot.
This circuit can be used to measure the frequency of a low frequency square signal. The signal can be...
This low power audio amplifier was found at 1992s Popular Electronics. Transistors are general...
This circuit is used to test an inductor (coil) allowing the observation of its opration in an R-L...