Introduction I now produce a range of adaptors that allows you to use an ATX power supply with an Amiga.
It does require you to use your existing power lead. Full instructions are provided. Available models Original adaptor (available to purchase 
Suitable for installation into an ATX tower case or standalone, use the push button switch to operate.
picoPSU Adaptor (available to purchase) 
Designed for installation inside the Amiga, especially suitable for the A500/A600/A1200. The right angled
connector provides a lower profile. You can operate the unit using a toggle or push to make switch.
I use a 90W picoPSU power supply, with a 60W mains adaptor, this has been sufficient to operate my A600 and
A1200/040 with CD-ROM. Coming soon, CDTV power adaptor
Currently undergoing testing is this adaptor, designed to allow you to replace the existing power supply inside the CDTV.
You can use a regular or picoPSU power supply.
Common design features
No modifications required to the ATX PSU.
Only 4 wires to install.
Connects to the power LEDs of the ATX case (original design only).
Simple push on connection to the ATX power switch (option to use a toggle switch with the picoPSU adaptor).
Capable of powering a fully expanded PPC Amiga.
.
Pricing and order
Please go to the Sales page
If you are resident in the UK and would like to pay by cheque, please contact me,  and I will supply my address for you to send the cheque to
Support
Installation manual (605K PDF file).
The schematics and PCB layout are available here (87 K zip file).
picoPSU Adaptor installation manual (199K PDF file)
The adaptors have been tested with a number of ATX power supplies, all worked without issue. The only clarification I would make is relating to the on/off timing.
To turn on/off, depress the case switch, count to 1, then release. It is the release of the power switch that triggers the circuit, this is subtly different to the operation of a PC.
PCB power ratings
The tracking of the PCB can take the following currents safely:
+5V, 8 Amps.
+12V, 2.5 Amps.
-12V, 1.8 Amps
By Ian Stedman, 01 June 2011. | 
