All times are GMT -6. The time now is Operation RTC Battery Override (A3000D) Part 2
I found the battery I was using was old, no good. I got a new battery (3.6V Ni-MH) and tried again. This time, things went better. It has been working for days now, keeping a charge.
Basically the - side of the battery is connected to the GND pin 9 on the wire wrap socket. The + side goes from the resistor shown to the battery.
Is it safe, does it work? Yes, for days now. Left on running for many hours. Off over night and during the day. I get home turn it on, and time is working!
How did I determine this? Schematics and using a meter to check the circuit when power is off. With power off, continuity check shows Pin 18 is connected to this resistor, on side shown. Obviously, jumper here goes to + side of the battery.
Notes:
* File down wire wrap legs, pins too thick for A3000 socket.
* Keep wires short.
The negative side:
The little board came from Radio Shack
The wire wrap socket I ordered from here:
http://www.goldmine-elec-products.co...?number=G16987
Basically the - side of the battery is connected to the GND pin 9 on the wire wrap socket. The + side goes from the resistor shown to the battery.
Is it safe, does it work? Yes, for days now. Left on running for many hours. Off over night and during the day. I get home turn it on, and time is working!
How did I determine this? Schematics and using a meter to check the circuit when power is off. With power off, continuity check shows Pin 18 is connected to this resistor, on side shown. Obviously, jumper here goes to + side of the battery.
Notes:
* File down wire wrap legs, pins too thick for A3000 socket.
* Keep wires short.
The negative side:
The little board came from Radio Shack
The wire wrap socket I ordered from here:
http://www.goldmine-elec-products.co...?number=G16987
Total Comments 2
Comments
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Nice little project, noticed from your latest post that it's still up and running... :)
Are you going to be producing them on a small scale to sell to others who may need one, or was this just a project for yourself to see if it could be done... :)Posted 03-06-2011 at 09:53 AM by Franko 
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I don't think I'm going into business yet Franko. But I was hoping someone would come along and take the idea and go forth.
It's still working, house not on fire
Sorry bout your 040 auction, gotta be another out there...Posted 03-07-2011 at 07:18 PM by TheGoose
