This circuit triggers a Sonalarme when the LED used as a sensor receives light. The circuit was found in an old documentation, but the components used are all current.
This circuit activates a water pump when the sensors detect lack of humidity in a vessel, for...
This 100 Hz filter was found in the August 1993 issue of Electronics Now. The components can be...
The charging current of this circuit is controlled by the temperature of the accumulators, which is...