Here are some of the pics of the supply I built.

Random Pictures of MPBS1 ATX Power Supply

Here are the Specs:

Input:

8 - 14 volts DC, non regulated

Outputs:

12v @ 2.0 amps > 75% efficient @ 12 volts in

3.3v @ 5 amps > 80% efficient @ 12 volts in

5v @ 5 amps > 85% efficient @ 12 volts in

-12 volts @ 50 mA amps

-5 volts @ 50 mA amps

+5 Standby 0.5 Amps (option #1)

or

+5 Standby 1.5 Amps (option #2)

Standby Current (main rails off no +5VSB load) < 0.5 mA (option # 1)

or

Standby Current (main rails off no +5VSB load) < 10 mA (option # 2)

Operating Current (no load) = < 150 mA

Power output approx = 70 Watts

Power input approx = 82 Watts (80% efficiency at rated load.)

I'm still not sure what to charge for the kit/supply. I am going to sell 2 of them for 90 bucks so I can get back some of the costs of development. I have spent over 60 hours designing and testing, but I don't know if I can order the parts in the quantities I need so that it costs me less than 90 bucks to build them. (it takes at least 2-3 hours soldering if you do it right) I will defiantly be selling kits. One option is to provide the board, heatsink housing, and maybe some screws. Along with a detailed guide and parts list. All of the parts can be ordered from www.digikey.com, but it looks like if you buy them in small quantities, it will cost about 90 bucks in parts.. :-( (and digikey is probably not the cheepest place to buy them, but they have everything.) If you wind your own coils, that will shave off 15 bucks on parts and if you get the main 4 ICs from Santa, that will shave off another 30 bucks.

Jeff_

Random Pictures of MPBS1 ATX Power Supply

Here are the Specs:

Input:

8 - 14 volts DC, non regulated

Outputs:

12v @ 2.0 amps > 75% efficient @ 12 volts in

3.3v @ 5 amps > 80% efficient @ 12 volts in

5v @ 5 amps > 85% efficient @ 12 volts in

-12 volts @ 50 mA amps

-5 volts @ 50 mA amps

+5 Standby 0.5 Amps (option #1)

or

+5 Standby 1.5 Amps (option #2)

Standby Current (main rails off no +5VSB load) < 0.5 mA (option # 1)

or

Standby Current (main rails off no +5VSB load) < 10 mA (option # 2)

Operating Current (no load) = < 150 mA

Power output approx = 70 Watts

Power input approx = 82 Watts (80% efficiency at rated load.)

I'm still not sure what to charge for the kit/supply. I am going to sell 2 of them for 90 bucks so I can get back some of the costs of development. I have spent over 60 hours designing and testing, but I don't know if I can order the parts in the quantities I need so that it costs me less than 90 bucks to build them. (it takes at least 2-3 hours soldering if you do it right) I will defiantly be selling kits. One option is to provide the board, heatsink housing, and maybe some screws. Along with a detailed guide and parts list. All of the parts can be ordered from www.digikey.com, but it looks like if you buy them in small quantities, it will cost about 90 bucks in parts.. :-( (and digikey is probably not the cheepest place to buy them, but they have everything.) If you wind your own coils, that will shave off 15 bucks on parts and if you get the main 4 ICs from Santa, that will shave off another 30 bucks.

Jeff_

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