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Old Jan 12, 2008, 06:57 AM
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Turtle_Flyer's Avatar
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power supply pinouts

I picked up a sony aps 111 power supply at a swap meet. it is 12v at 34 amps. I am wondering if this is too big for lipo charging?

Also I have no pinout. Plugging it in will not turn it on. I have to jumper the switch pins. Problem is I have no schematic. Anyone know where I can get one. My guess would be "guessing" on the jumpering could be dangerous.

I have done PC power supply conversions before so I know that it can be dangerous inside these things.
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Old Jan 13, 2008, 05:09 PM
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USA, GA, Marietta
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A power supply cannot be too big as long as it is a 12 volt supply. Your charger will only draw as much current from the supply as it requires. Power supplies do not "push" current into a load.

As far as a schematic try Googling for a supplier of that power supply. Maybe one of the distributers can help you.

Glen
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Old Jan 15, 2008, 08:59 PM
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Quote:
Originally Posted by ggcrandall1
A power supply cannot be too big as long as it is a 12 volt supply. Your charger will only draw as much current from the supply as it requires. Power supplies do not "push" current into a load.

As far as a schematic try Googling for a supplier of that power supply. Maybe one of the distributers can help you.

Glen
Thanks..I remembered from my old electronics days that amps equals a draw as soon as I read this.

I have googled for hours on this puppy. Nothing. Sad thing is I just need the pins to short so it comes on. I can meter the rest. I can think of no method to determine this other than having a schematic. Darn shame as I paid $2 for it and it looks to be new.
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Old Nov 05, 2009, 01:12 AM
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USA, CA, Sunnyvale
Joined Nov 2008
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I got one of these power supplies (Sony APS-111) to work

I got one to work. Mine was being thrown out at my company (really).

I tried connecting each of the signal lines to ground with a 1K resistor one at a time. It only took one (19). I changed the resistor to a jumper for testing. I tested it at 50W (4 amps), the voltage fell from 12.2 to 12.1, good enough.

I accidentally connected one signal wire (19) to another apparent signal wire (21), thinking it was a ground, but it works. It appeared that there were 8 ground wires, but there were really 7. I tried jumpering to ground too, and that works also. Using 21 for the jumper ground frees up a heavier wire for power connection. Measuring the resistance to ground for pin 21, I got about 5 ohms or less.

The connector is like this with the power supply right side up:
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24

Jumper 19 to 21 (22 for the extremely careful)
+12 is 1-4 and 13-15
Ground is 9-12 and 22-24

M
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Old Nov 05, 2009, 08:44 PM
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Quote:
Originally Posted by MDavis22 View Post
I got one to work. Mine was being thrown out at my company (really).

I tried connecting each of the signal lines to ground with a 1K resistor one at a time. It only took one (19). I changed the resistor to a jumper for testing. I tested it at 50W (4 amps), the voltage fell from 12.2 to 12.1, good enough.

I accidentally connected one signal wire (19) to another apparent signal wire (21), thinking it was a ground, but it works. It appeared that there were 8 ground wires, but there were really 7. I tried jumpering to ground too, and that works also. Using 21 for the jumper ground frees up a heavier wire for power connection. Measuring the resistance to ground for pin 21, I got about 5 ohms or less.

The connector is like this with the power supply right side up:
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24

Jumper 19 to 21 (22 for the extremely careful)
+12 is 1-4 and 13-15
Ground is 9-12 and 22-24

M
Hey thanks I understand everything you are saying except the 22 for the extremely careful part. Can you elaborate?
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Old Nov 05, 2009, 09:21 PM View Post
nicolezhu85
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Old Nov 06, 2009, 07:20 PM
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Hey Nicole,
Can you send me a PM? For some reason your last post was deleted.
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Old Nov 06, 2009, 11:44 PM
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USA, CA, Sunnyvale
Joined Nov 2008
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Quote:
Originally Posted by Turtle_Flyer View Post
Hey thanks I understand everything you are saying except the 22 for the extremely careful part. Can you elaborate?

Sure, 21 is not a "power" ground, so there is slight risk in using it. Using it, however, frees up a "power" ground connection, 22 is the closest.

If you are not using the connector pins, and just soldering all of the wires together, you can jumper to ground by soldering to a ground, and forget pin 21.

I got good ideas on power supply conversions from this thread:
http://www.rcgroups.com/forums/showthread.php?t=1005309

M
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Last edited by MDavis22; Nov 07, 2009 at 12:01 AM.
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Old Nov 08, 2009, 05:43 PM
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Thanks I do not need another PS but I have just got to try this. HA!!!
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Old Nov 12, 2009, 08:43 PM
T28 and counting
Sunnyvale, CA
Joined Mar 2009
1 Posts
It never hurts to have backup P/Ss.

I leave a spare by the computer to power a charger while configuring it via USB cable.

M
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