Re: Alarm system transformer + power supply (would both go bad at once?)

I'm not sure what to make of these measurements:

1. Battery hooked to power supply is 12.87VDC:
   formatting link

1. Yet, battery hooked to PWR and GND blades of power supply = 0VDC:
   formatting link

2. Battery hooked to just GND blade on the power supply = 12.87VDC:
   formatting link

1. Battery hooked to just PWR blade of power supply = OVDC:
   formatting link

This makes no sense to me; but I'm not an EE.

Does this (repeatable) information above tell us anything about the power supply or battery?

Note: This dent in the capacitor was due to it being pressed down against the transistor (I pushed it away):

read more and respond »

Posted 5 years ago by Danny D'Amico in CCTV, Alarms and other Physical Security

Report misuse