Datasheets


N° of component 

Micro Alarm (CB1512E )

--     We find this configuration very simple in a previous American publication of 1973. The transistor can be the BC558 and the sonalert (buzzer with internal oscillator) can be of other voltages (6 or 12 V), depending on the power used. Several sensors can be used in series. The circuit fires with the sensors opening.


Circuit Bench