PC 220V POWER SUPPLY TO SEGA NAOMI CONVERSION

I was wondering if it is possible to convert a 220v computer power supply to connect to a Naomi board instead of the original 110v with a converter from 220v to 110v. After some research on the internet i found guides and articles, so i tried to make one of my own. Using only screw terminal strips and insulating tape i connected Naomi's power cables to PC power supply cables without soldering or buying specific molex and adapters. If you have some spare Naomi extension power cable or from remove a burned Naomi power supply for example, along with a spare PC power supply i believe its really easy to make.

For the conversion of the PC power supply to be able to connect to a Naomi system i used:

- A 300w -220v PC power supply

    

- Naomi's JST power cables removed from a burned 110v power supply



- Screw terminal strips with around 16 available ways in total

   

- Insulating tape

Pictures finished

First i removed the cables from the burned Naomi power supply by simply cutting them and striped them. Afterwards i checked the diagram below, that i found on the internet, i checked the PC power supply and found the corresponding cables according to the voltages.

Image found at www.sega-naomi.com forum

The Naomi needs the following voltages:
2 x +3.3v, 2 x +5v, 1 x+12v and 7 x ground - common

Most of this wires you can find it on the 20pin that connects to the motherboard from the PC power supply.

Finally i cut and striped the corresponding wire and connected them together with the screw terminal strips. In the end the only thing that i needed to do is to short the power switch with a ground wire on the PC power supply in order to automatically turn on when you plug it in. In my case the power switch was the gray colored as you can see in the picture above.

I tested it with Naomi and Naomi 2 board and worked great without having to use 110v to 220v converter and the original Naomi power supply. If you do not want to solder or buy specific adapters i believe that this is an easy and cheap way to convert the power supply as long as you have those spare parts lying around.

By Tokugr