Customer had a rat shack unit. It had a transformer that plugged into an ac outlet. The base unit was on one side of the door and a reflector was on the other side. Just like the ones used in the 7 eleven's. They said that it would go off for no reason. I kept the ding donger (buzzer) and roped a n/o contact that I attached to the top plat of the door. Its just like the ones used for alarm systems. It does ding gong every time the door contacts are broken. My power source was a standard class 2 transformer (18 to 24 vac) on the secondary windings.
[EMAIL PROTECTED] wrote: >>Anyone know what that switch that hangs over the door & trips when >>the door opens is called? It trips a small gong to let folks in >>the office know someone just walked in... >> >> > >Door Annunciator, but you can go to Rat Shack or equivalent and get a >door contact (you pick n.o. or n.c.) for an alarm system. > > > > >>I can picture it; an arm, pendulem, contact.... but can't think >>of a good Google noun. >> >>I have a plan B in mind; a standard recessed contact, a gonger >>that goes off once when it opens, and a PIR inside so that when >>someone leaves, it's silent, but that will take some design. >> >> > >_________________________________________________________________ >KX-T Mailing list --- http://kxthelp.com/ >Subscription changes: http://kxthelp.com/mailman/listinfo/kxt > > > _________________________________________________________________ KX-T Mailing list --- http://kxthelp.com/ Subscription changes: http://kxthelp.com/mailman/listinfo/kxt
