Position: Index > Led Circuit >

Heat Or Light Activated Alarm Circuit

2014-12-19 20:42  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


The tone generated by a 555 oscillator can be turned on (activated) by heat or light. That causes Ql to conduct transistor W2 (TIP 3055).
Heat Or Light Activated Alarm Circuit

Q2 (TIP 3055) acts as an audio amplifier and speaker driver.



Reprinted Url Of This Article:
http://www.next.gr/sens-detectors/light/heat-or-light-activated-alarm-circuit-l14527.html