ATX Power Supply Adapter

[MrChristmas2000]

Phil,

Will you be producing a pcb run of those ATX Adapter boards?

I didn't see a visible load resistor. Is it behind the main ATX connector?

Tom

[Aussiephil]

Tom

I split this topic away from the MR16 thread to avoid confusion for others

Tom Question: Will you be producing a pcb run of those ATX Adapter boards?
I doubt that there is a real demand for these but i could be proved wrong - this is more aimed at the home etch crowd. I'm happy to send these out to any Aussie members in exchange for a couple of dollars but the postage to the US would be a killer

Tom Question: I didn't see a visible load resistor. Is it behind the main ATX connector?
the original pictured board was just a quick proof of concept and an exercise in etching, the design below does have room for a load resistor.

All

I have designed a little 3" x 2" single sided PCB that has 24 pin and 4 pin sockets along with output screw connector, switch and led so that ATX Computer power supplies can be quickly converted to standalone Power supplies.

Below are scans of the etched board i did a few days ago, along with a component overlay just waiting on parts from Mouser to confirm everything fits.

The BOM from Mouser to fully populate this board with all the connectors and parts is just under $9 US, however the 24pin/20pin (J1) and 4pin (J5) Motherboard power sockets could be recovered from a dead motherboard (it's what i did for the first board)
J3 and J4 are IDE drive power sockets and are optional unless you are drawing high amps.

Switch (S1) is a PCB mounted SPST switch, any panel mount switch could be used if you soldered wires in.
 
As soon as i confirm that everthing fits i will post the PDF's for the copper sides.
Cheers
Phil

[MrChristmas2000]

It's been years since I even attempted to etch a pcb.

I guess I need to educate myself on the latest do it at home etching process.

It seems like it would be easy to produce the film today than it used to be. I am from the old school where you had to hand tape the artwork and produce the negative from that. Now I think that its just print it out and expose it. I just need to find a source of local supplies.

Thanks for the artwork I just may try it.

Tom

[Aussiephil]

Update:

All the parts have arrived and everything fits - the switch is a little close to the 24pin socket, still fits but hard to work - i will move that then post the pdfs. The image below is missing the wire jumpers as it was just a dry fit of the components.

Phil

[MrChristmas2000]

Have you had a chance to make the changes to your pcb yet?

Do you have a BOM for this? I'm about to do a parts order from Mouser.

Thanks

[Aussiephil]

Tom

sorry knew i had forgotten to update something:)

Mouser Parts Bom is
538-15-24-4745 | 2
538-39-29-9242 | 1
538-39-31-0040 | 1
538-39543-0010 | 1
638-264-7GT | 1
271-270-RC | 1
108-0041-EVX | 1

authoratative list for futher reference is at
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I'll post the PDF's for the etch  tonight

Phil

[Aussiephil]

All

Attached are the PDF files for anyone wanting to etch this themselves this is a single sided board and i would suggest 2oz copper due to the potential for high currents.

Bottom.pdf : is the one needed to etch the board.
top.pdf : Show the location of the two Jumpers that need to be installed.
topprint.pdf : Is the component overlay for the board.

For anyone in OZ i have a limited number of the home etch boards that i can send out, at cost+mailing. PM if you would like one.

Cheers
Phil

[vairmoose]

Just a thought for your consideration,  add provisions for the Serial ATA pwr supply attachment. 

   

[Aurbo]

AussiePhil,

While applying  the Bottom.pdf to a heat transfered image onto the copper board, the text comes off backwards.

Does this mean the whole bottom.pdf needs to be inverted prior to printing or is this just a text issue?

Cheers
Aurbo

[wbuehler]

AussiePhil,

While applying  the Bottom.pdf to a heat transfered image onto the copper board, the text comes off backwards.

Does this mean the whole bottom.pdf needs to be inverted prior to printing or is this just a text issue?

Cheers
Aurbo

Aurbo

Aussiephil has not been around in quite some time.  You may not receive a resonse to this question.

Bill

[Aurbo]

Thanks for the info Bill.

Maybe you can assist on this question.

Load resistor, is it needed and if so, whats the value?

Cheers
Steve

[MrChristmas2000]

Not required with his adapter design due to the led and resistor performing that function. If you have a supply that will not stay on use a 10 watt, 10 ohm wire wound load resistor (sandbar - about $0.80 at Radio Shack).

[lightsup]

Thanks for sharing your atx adapter PCB board Aussiephil.

[wbuehler]

Here is a BOM for the ATX Power Adapter that was used when the Co-Op ran.

Bill