This tutorial is still a work in process and will be updated from time to time whenever I have the time to work on my new investment
So everything you do you do at your own risk!If I have posted misinformation then please correct me and I will edit the tutorial.
So here is a little background. I started this project because I wanted my A1200 to remain in its original case with minimum modificatioins and the PSU needed to have the juice to power up BlizzardPPC 200Mhz 060@50Mhz and bVision. I also didn't want to use a big normal sized ATX PSU outside the case, because the additional power connectors would be just too ugly on my desktop
What you need:
There is a little PSU called iTuner PW-200-M can be found from
http://www.mini-box.com/PW-200M-DC-DC-power-supply?sc=8&category=13You will also need a good 12VDC power adapter for that, also found from
http://www.mini-box.com/110w-12v-8-5A-AC-DC-Power-Adapter?sc=8&category=13That 12VDC power adapter has a total ouput of 110W which should be enough for the configuration I mentioned above. PW-200-M can manage a 6A constant load on 5VDC line and peak at 10A which should also be enough.
Here is what you need to do to fit the PSU under the floppydrive. Desolder the ATX connector from the PW-200-M PSU. I would also reconmed to desolder the original Amiga PSU connector, so that you can run thick enough wires directly to the PCB.
Here is a picture of the connection on the Amiga PSU connector end after desoldering and running the wires directly to PCB. I used 1mm² wire for the O VDC(COM) line, and 0.75mm² wire for 5 VDC line. The thicknes for the 12VDC line and -12VDC line aren't so important so I used a 0.5mm² wire for those.
Sorry I'm unable to upload the picture for the ATX PSU end now. Anyways here is a pinout for ATX 20pin connector. I'll upload the pic ASAP
EDIT: How stupid of me I forgot that one can upload pics to here
So here it is and more pictures coming
http://www.hardwarebook.info/ATX_Power_Supply