When I tried mine, I attached only the critical items first to ensure my PSU started. I did not and still do not have an LED or a switch. My PSU came with a switch on the back by the AC connection. I am NO expert but did get mine to work, mostly. I am still trying to figure out how to differentiate the 12V1 and 12V2 because the wires are all yellow. WELL, I HAVE BEEN USING A MAGNIFYING GLASS AND A FLASHLIGHT TO TRACE A WIRE BACK TO THE CIRCUIT BOARD AND USUALLY THERE IS SOME KIND OF INDICATION PRINTED AS TO WHAT IT IS FOR. LIKE MY GREY LINE SAYS "AUX GROUND" AND I CAN FIND ALL THE -12V, +12V LINES ETC. THE SAME WAY.
The only item I notice in your write-up is the connection of the green wire to the switch. When I asked the question, I was told (ref. post dated 4/1 by Andrew) that the green needed to be shorted to ground so I connected the green and black together and mine worked. YES, THE GREEN IS A SENSE WIRE AND BLACK (GROUND)IS THE OTHER SIDE OF THE SWITCH. I'LL ELIMINATE THE SWITCH FOR NOW THOUGH AND SEE IF I CAN GET SOMETHING TO WORK. I LIKE THAT IDEA.
My PSU shut off when I accidentally had it shorted out (thankfully) so I didn't smoke anything. Here's how much of an electrical idiot I am...I didn't use insulated binding posts and wondered for about a day while mine did not start. The light bulb finally went off and I figured that I had both the 12v and 5v lines shorted because of the posts I bought. I found the non-insulated posts at Radio Shack and then everything worked. HEY...I CAN'T CALL ANYONE AN IDIOT ON ANYTHING...MY PROFESSIONAL PURSUITS ARE SO TOTALLY DIFFERENT FROM MY HOBBY THAT I CAN ONLY LEARN THIS STUFF BY READING AS MUCH AS I CAN WITH LIMITED TIME. SOME GUYS ON RCU TALK ABOUT THIS STUFF IN THERE SLEEP!
I did re-install a new resistor this weekend and got the 12v line above 12v without a load (gained about 0.10v with 10ohm/10W resistor on the 5V line). When I connected my charger this weekend I noticed the output dropped to about 11.85 to 11.9v with load. YOU KNOW, I JUST CONVERTED A DELL POWER SUPPLY AND THE VOLTAGE DROPPED ABOUT THAT MUCH WHEN I CHARGED ONE OF MY A123 BATTERIES. SOMEONE SAID IT WAS MOST LIKELY BECAUSE I WAS PUSHING THE POWER SUPPLY, IT WAS PRODUCING ABOUT ALL THE AMPS THAT IT COULD AND THAT IS WHY THE VOLTAGE WAS DROPPING. I'M HOPING THE ATX UNIT WILL DO BETTER AS I WOULD LIKE TO CHARGE MORE THAN ONE BATTERY AT A TIME.
I have 2 outstanding questions if anyone can help:
1. Is there anyway to increase my 12v voltage under load? Will a bigger resistor on the 5v line help?
2. How can I tell my 12V1 vs. 12V2 lines apart? I tied the 2 yellow wires (no stripes) off the 4pin connector and they have the same voltage with no load as the other yellow wires with load. I have 2 separate posts and 2 separate grounds with the hope of running 2 chargers from this PSU. TRY THE MAGNIFYING GLASS!