ATX power supply and Amiga 1200

HardStep · 25 January 2006, 17:22

Hi guys,
Can i use a ATX PSU with A1200 and turn the machine off by software?

Chain · 25 January 2006, 18:53

atx psu can be used for sure, but software switching "will needs some relay on paralel/whatever port" - just my idea howto do it

Jope · 26 January 2006, 08:12

It needs a circuit that toggles it's state when you press a pushbutton connected to it..

Then you can make the Amiga's parallel port also toggle the pushbutton momentarily and it will shut down.

jmmijo · 26 January 2006, 16:01

Perhaps if you look at the Form Factors site you can get all the info you need on how to do this. Please note section 3.3.2 and the PS_ON# signal, this is an active low signal that tells the power supply unit to turn on from idle or standby mode.

Then go to page 36 to view the main ATX power connector, note the PS_ON# signal pin and any ground pin. Just use an old reset or power switch from a PC chassis, the momentary on kind of switch, to connect them up and there you go

billy · 26 January 2006, 22:18

Aminet has docs on how to wire up a dual flip-flop and a momentary switch for the control of an ATX power supply. It wouldn't be that hard to extend that to a parallel port. Of course you would only have poweroff at shutdown, but how cool.

I use an old 250 watt ATX to power my A600's. She's got an AC switch on her, so all I had to do was jumper the power good signal to ground.

Good luck!

Dizzy · 02 February 2006, 21:06

I just found this guide

he also got some other nice guides http://www.ianstedman.co.uk/Amiga/amiga.html

25 January 2006, 17:22	#1
HardStep Registered User Join Date: Dec 2005 Location: Toronto Posts: 185	ATX power supply and Amiga 1200 Hi guys, Can i use a ATX PSU with A1200 and turn the machine off by software?

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25 January 2006, 18:53	#2
Chain A-Collector, repairments Join Date: Jul 2001 Location: Czech Rep. Age: 50 Posts: 1,536	atx psu can be used for sure, but software switching "will needs some relay on paralel/whatever port" - just my idea howto do it

26 January 2006, 08:12	#3
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,862	It needs a circuit that toggles it's state when you press a pushbutton connected to it.. Then you can make the Amiga's parallel port also toggle the pushbutton momentarily and it will shut down.

26 January 2006, 16:01	#4
jmmijo Junior Member Join Date: Jan 2002 Location: PDX Age: 62 Posts: 2,396	Perhaps if you look at the Form Factors site you can get all the info you need on how to do this. Please note section 3.3.2 and the PS_ON# signal, this is an active low signal that tells the power supply unit to turn on from idle or standby mode. Then go to page 36 to view the main ATX power connector, note the PS_ON# signal pin and any ground pin. Just use an old reset or power switch from a PC chassis, the momentary on kind of switch, to connect them up and there you go

26 January 2006, 22:18	#5
billy Registered User Join Date: Jun 2005 Location: US / A Age: 49 Posts: 134	Aminet has docs on how to wire up a dual flip-flop and a momentary switch for the control of an ATX power supply. It wouldn't be that hard to extend that to a parallel port. Of course you would only have poweroff at shutdown, but how cool. I use an old 250 watt ATX to power my A600's. She's got an AC switch on her, so all I had to do was jumper the power good signal to ground. Good luck!

02 February 2006, 21:06	#6
Dizzy Pirate Join Date: Jan 2002 Location: Denmark Posts: 3,395	I just found this guide he also got some other nice guides http://www.ianstedman.co.uk/Amiga/amiga.html

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