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Author Topic: Need advice on AT power supply on Amiga.  (Read 1191 times)

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Offline brostenenTopic starter

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Need advice on AT power supply on Amiga.
« on: August 08, 2019, 07:53:56 PM »
Hi all.
I am doing a project, and I need to power a 500-Board with an AT power supply. And I am a bit in the dark, on how to wire it up correctly in order not to mess things up.

The AT PSU have these two P-Connectors that I wish to use for giving the Amiga power. Can they be used, for giving power to the board. (I know that I need to change the plugs that are on them right now for it to work) And if I can use them, do I need to solder all the wires of same colours together in order not to overload something inside the AT-PSU?
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Offline klx300r

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Re: Need advice on AT power supply on Amiga.
« Reply #1 on: August 08, 2019, 10:09:46 PM »
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Offline brostenenTopic starter

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Re: Need advice on AT power supply on Amiga.
« Reply #2 on: August 08, 2019, 11:04:37 PM »
Quote from: F1Lupo on August 08, 2019, 10:09:46 PM
http://ianstedman.co.uk/Amiga/amiga_hacks/Amiga_Power_supplies/amiga_power_supplies.html#ATXPSUsome great info on power supplies for our miggies.

Yes.... I have read that page, yet I am still after some advice, if it is best to bundle all the wires according to their colours. Or I can go by with one of each colour, that are found on the P7 and P8 plugs. What about shielding, the page tells that it is not useable, yet if I use it for something, then what to use it for?

Basically, are there something that is good to take in account wich is not explained on that page? What exactly have people here done through the years?
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Offline Brian Hoskins

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Re: Need advice on AT power supply on Amiga.
« Reply #3 on: August 11, 2019, 03:54:09 PM »
Quote from: brostenen on August 08, 2019, 07:53:56 PM

The AT PSU have these two P-Connectors that I wish to use for giving the Amiga power. Can they be used, for giving power to the board. (I know that I need to change the plugs that are on them right now for it to work) And if I can use them, do I need to solder all the wires of same colours together in order not to overload something inside the AT-PSU?

Just so I know we're on the same page here, you're talking about repurposing the P8/P9 connectors to power an AMIGA, is this correct?

According to pinouts.ru the P8 connector is the one you want to use.  In this case the only duplicated signal is ground - there are two of them on this connector.  I would use one for the AMIGA ground connection, and the other one can connect to the SHIELD.

But I would probably choose to use an IDE power connector instead.  The only thing is you'd need to pull the -12V from the P8 connector.

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