This circuit was found in an American medical documentation from 1970. The circuit rejects the 60 Hz noise pickup and generates 2.5 Hz signals. Equivalent components can be tested.
This circuit, which has a very common configuration, was obtained in a 1994 documentation. It can...
This project was published in the April 1989 issue of Radio Electronics magazine. It drives LEDs...
This circuit was found in a Hands-On Elctronics from 1987. The field effect transistor admits...