Universal multi-function alarm and timer circuit 555


Posted on Mar 28, 2007

As shown for the general multi-function alarm and timing circuitry. The timing of the circuit can range from 5 minutes to 3 hours. Timing components C2, VD1 and VT1 composition


Universal multi-function alarm and timer circuit 555
Click here to download the full size of the above Circuit.

capacitance multiplier circuit 555. CK1 from the timing input socket ~ 9V DC voltage, and so the timing for radio work. K1 is set to the timing gear, press the AN, 555 feet high output (6 ~ 9V), while VT2 off. When the timer expires, the three 555 pin goes low, CK1 no voltage output, VT2 is turned on, the alarm circuit F1 and F2 generation of the alarm sound and light alarm 20 seconds and F3 to F5 generated. A, B-side can add a variety of additional sensors sound and light alarm circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Video Operated Relay
Inductance adapter for frequency meter
Simple Digital Potentiometer with DS1869
Successive approximation a-d converter
Sca background music decoder
Cro-doubler
500W power inverter circuit diagram
Single transistor radio
LM4610 Dual Dc Operated Tone/volume/balance Circuit With National 3-d Sound - National Semiconductor
6 static display circuit
With triac light control lamp 1



Top