I have built this alarm and it works well on the bench but with the alarm stationed in the house and the power, key and switch extended to the garage it goes into alarm after several hours of being switched on.
I have used another duplicate alarm and have tested the magnetic contacts and the only possible cause that I see is the extra length of wire, about 40 feet of 19 gauge to the garage from the house.
The alarm only activates when the scr receives current but if the contacts remain open where is the voltage coming from and why would it take several hours to activate?
The power supply is 12 volts, 2 amps.
I have used another duplicate alarm and have tested the magnetic contacts and the only possible cause that I see is the extra length of wire, about 40 feet of 19 gauge to the garage from the house.
The alarm only activates when the scr receives current but if the contacts remain open where is the voltage coming from and why would it take several hours to activate?
The power supply is 12 volts, 2 amps.