We have a newly alarmed outside wall's razor wire and my diy installation works fine and reliably.
However, my wife commented this morning that the siren sounds indistinguishable from other sirens going off occasionally in the neighbourhood.
So I scratched around my rubble and found a much bigger piezo siren which used to be part of an earlier Chubb alarm system we had.
I tried it with a 12V gel battery but there's no sound. I removed a cap on the siren's rear and found a small pcb with very few parts on it. 6 Resistors, 2IC's marked P641/NE555 and below SN72555P, 2 caps? marked 104Z, 2 more capacitors and a transistor? marked BD 435-16.
There are no loose wires, the pcb and its parts still look as new and it has been in dry storage all these years.
I know these things are not expensive but since I have the thing, do you think I can get it to work if the parts on the pcb are replaced?
Thks
skollie
However, my wife commented this morning that the siren sounds indistinguishable from other sirens going off occasionally in the neighbourhood.
So I scratched around my rubble and found a much bigger piezo siren which used to be part of an earlier Chubb alarm system we had.
I tried it with a 12V gel battery but there's no sound. I removed a cap on the siren's rear and found a small pcb with very few parts on it. 6 Resistors, 2IC's marked P641/NE555 and below SN72555P, 2 caps? marked 104Z, 2 more capacitors and a transistor? marked BD 435-16.
There are no loose wires, the pcb and its parts still look as new and it has been in dry storage all these years.
I know these things are not expensive but since I have the thing, do you think I can get it to work if the parts on the pcb are replaced?
Thks
skollie
