PIC interesting a1200 m/b power hack: takes power from normal HDD power cable plug! - Page 2

AMIGAZ · 16 June 2006, 21:22

Quote:

Originally Posted by DoctorQ

Yeah, wouldn't mind a couple myself, for a couple of CyberStorms and my Blizzard PPC. AMIGAZ, will you let us know if they send worldwide??

Will do, Allan

AMIGAZ · 16 June 2006, 21:24

Quote:

Originally Posted by Hacky

I think they will do it. As I read in the business conditions they sell
to EU states and also outside the EU.

If you need help let me know...

Ahh....ok
My german is quite rusty.
Guess I´ll place an order for a bunch of these babies then

Chain · 17 June 2006, 10:56

No -12V? how he can live without Paula?
geeez

Hacky · 17 June 2006, 12:12

Quote:

Originally Posted by Chain

No -12V? how he can live without Paula?
geeez

The -12 Volt are still available in the Power connector of the Powersupply which is connected normaly to the Amiga !

There is only NO bridged -12 V wire on the mainboard because a PPC card
does not need a high quality -12 Volt connection.

Bamiga2002 · 17 June 2006, 12:26

@Hacky:
That's a super amiga there!

All the gear fitted inside the desktop case, just great. Makes my towered miggy feel ashamed. Thanks for the heatsink-fancooler tip, that's the only thing holding back my 99% finished tower project (cooling)

AMIGAZ · 17 June 2006, 12:39

Quote:

Originally Posted by Bamiga2002

@Hacky:
That's a super amiga there!

All the gear fitted inside the desktop case, just great. Makes my towered miggy feel ashamed. Thanks for the heatsink-fancooler tip, that's the only thing holding back my 99% finished tower project (cooling)

Yeah, we wanna se your tower finished

keropi · 17 June 2006, 13:47

@Bamiga2002: STILL not finished?????

@hacky: I am dumb, I still do not unterstand where u plug the -12V line....

blade002 · 17 June 2006, 13:58

That 1200 is unbelieveable!!!!

Hacky · 17 June 2006, 18:47

Quote:

Originally Posted by keropi

@Bamiga2002: STILL not finished?????

@hacky: I am dumb, I still do not unterstand where u plug the -12V line....

I think you think to much complicated.

Imagine:

You have a normal A1200 and normal Power Unit.
I only have a more pwerful power unit as my machine realy need at least a 100 watt unit and I have a 250 watt unit.

The only thing I did is:

I took the A1200 board out of the Desktop case and soldered 4 wires on the back of the board near the Power Input connector.

These wires end in a molex connector which has the total normal output of +12V,GND,GND and +5V. The molex can now pluged on a Floppy molex Connector and then pluged to the Floppy connector on the A1200 board. The Floppy connector on the A1200 board is electrical very near to the expansion port.
So you have a very stable +12V and +5V at the expansion port and your PPC card will work fine all the time, even if you have a PPC240 and even if you have a 68040 (heater) installed on the PPC card.

Thats it.

Never built a bridge to the fan connector of the PPC card !
The fan connector of the PPC card is not the right place to be connected to an extra +5V connector !
It could damage the card.
I read this stupid hint in an other forum I think it was Amiga.org.

The PPC +5V fan connector is only a good place for measuring how much of the +5V is realy available to the PPC card.

keropi · 17 June 2006, 20:26

but the amiga psu also gives -12V .... what I do not understan is how yours work without the -12V...

Hacky · 17 June 2006, 20:36

Quote:

Originally Posted by keropi

but the amiga psu also gives -12V .... what I do not understan is how yours work without the -12V...

Exactly, die PSU gives -12 Volts and all the other voltages.
The PSU is pluged into the A1200 board.

So why should there be no -12 volts available ?

I have a PSU with all these voltages and with exact the normal
Amiga 500/500/1200 connector you posted.

Anyway I thing if I had no -12 volts (but I have them) it is only
a problem for the serial port which needs -12 volt ...

keropi · 17 June 2006, 20:40

yes, the pc psu can give -12V, but you do not have it connected to the a1200....
that is what I am asking from the beginning...

DoctorQ · 17 June 2006, 21:44

Ehh, he wrote this

Quote:

Exactly, die PSU gives -12 Volts and all the other voltages.
The PSU is pluged into the A1200 board.

So why should there be no -12 volts available ?

I have a PSU with all these voltages and with exact the normal
Amiga 500/500/1200 connector you posted.

He has an external PSU with the original power cable from the brick PSU attached, as well as the molex connector shown in his pictures. At least that is how I understand it.

Another problem with having a computer without -12v is that the sound will be terrible. The computer will boot and work without -12V connected, I did that for a couple of days with my A1200 around 1995 or so.

keropi · 17 June 2006, 21:52

oh, now I get it... he also has the plug connected !

Hacky · 17 June 2006, 21:58

The four soldered wires are only for internal use.

So the Amiga looks nearly orginal connected with a "normal" PSU

keropi · 17 June 2006, 22:11

now I get it 100%
I never realised you were also connecting the amiga's psu too! lol

you just use it to juice-up the accelerator!

blade2565 · 18 June 2006, 00:45

Quote:

Originally Posted by keropi

does the cd/hdd power cable have +5 / +12 / -12 lines????

Hell no it has only +12V G G 5V, you need the original power connector which connects on the board...

Also I don't understand why he didn't use AT powersupplies easier because they have huge plug. but also you can use ATX with a swith instead of what he made... only need to connect 2 cables to switch it on.... if I remember right green with ground is ATX powersupply on...

Paul · 15 July 2006, 15:30

I think this thread deserves to be moved to the new prb.Hardware pics forum

keropi · 15 July 2006, 18:03

@paul:
yep!

mihcael · 16 July 2006, 02:55

That is just about the ultimate amiga!

A1200 was the best designed i think, and it has everything!!

He has shoved 6 fans inside that thing, insane!!!

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17 June 2006, 10:56	#23
Chain A-Collector, repairments Join Date: Jul 2001 Location: Czech Rep. Age: 50 Posts: 1,536	No -12V? how he can live without Paula? geeez

17 June 2006, 12:26	#25
Bamiga2002 BlizzardPPC'less Join Date: May 2004 Location: Finland Age: 46 Posts: 3,210	@Hacky: That's a super amiga there! All the gear fitted inside the desktop case, just great. Makes my towered miggy feel ashamed. Thanks for the heatsink-fancooler tip, that's the only thing holding back my 99% finished tower project (cooling)

17 June 2006, 13:47	#27
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	@Bamiga2002: STILL not finished????? @hacky: I am dumb, I still do not unterstand where u plug the -12V line....

17 June 2006, 13:58	#28
blade002 Zone Friend Join Date: Dec 2005 Location: Australia Age: 50 Posts: 2,616	That 1200 is unbelieveable!!!!

17 June 2006, 20:26	#30
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	but the amiga psu also gives -12V .... what I do not understan is how yours work without the -12V...

17 June 2006, 20:40	#32
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	yes, the pc psu can give -12V, but you do not have it connected to the a1200.... that is what I am asking from the beginning...

17 June 2006, 21:52	#34
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	oh, now I get it... he also has the plug connected !

17 June 2006, 21:58	#35
Hacky Zone Friend Join Date: May 2006 Location: Berlin Age: 53 Posts: 89	The four soldered wires are only for internal use. So the Amiga looks nearly orginal connected with a "normal" PSU

17 June 2006, 22:11	#36
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	now I get it 100% I never realised you were also connecting the amiga's psu too! lol you just use it to juice-up the accelerator!

15 July 2006, 15:30	#38
Paul RIP Friends Join Date: Sep 2005 Location: UK Posts: 2,157	I think this thread deserves to be moved to the new prb.Hardware pics forum

15 July 2006, 18:03	#39
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	@paul: yep!

16 July 2006, 02:55	#40
mihcael Zone Friend Join Date: Jan 2006 Location: Aussie Posts: 1,144	That is just about the ultimate amiga! A1200 was the best designed i think, and it has everything!! He has shoved 6 fans inside that thing, insane!!!

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