i need your help in simple matter in smoke detector card with 9 Volt battery

power.boss_eng

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إنضم
29 مارس 2011
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السلام عليكم...

i have a smoke detector with 9 volt battery and the alarm ( Buzzer)what i wanna ask is :
how could i take the output voltage signal from the buzzer to get a (closed loop) signal to and so connect it to a designed card from my company design and save it as a log
and i would like to add that i already designed a card from the 7408 IC (And gate) to make the output signal about 1 volt but its discontinuous so how could i get continuous ( closed loop signal ) >>and if there is any relay or whatever work on these low voltages and give me closed loop.

thanx...
kind Regards

Eng-Omar

 

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