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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: blakespot on February 14, 2004, 02:00:55 PM

Title: A1200 - power in on floppy power port?
Post by: blakespot on February 14, 2004, 02:00:55 PM

I am building an A1200 tower with an 060 accelerator and I intend to use a PCMCIA ethernet board with it.  I have been advised that when lots of power-sucking addons have been put into an A1200, and when you've got the convenience of having this all in a tower case, that it is wise to  connect power, from the case's power supply to the Amiga 1200's motherboard floppy power connector (that normally supplies power to the A1200's floppy drive).  Here power is feeding into the system where normally it is being used to power another device _from_ the A1200 itself.  This would be in addition to the normal A1200's power input, of course.

I see the logic here, with that much of a power pull on the A1200.  But am a little nervous about it - are folks using this config for good runs of time without issue?  Just wanted some user experiences here.

Thanks!


blakespot

Title: Re: A1200 - power in on floppy power port?
Post by: blobrana on February 14, 2004, 02:12:36 PM

I usually always try to go for a `direct` power supply to any peripheral.
If your power supply is a good one then it should be stable and provide a clean source directly...
i have used this set up for two years now, without it blowing up...
(or having timing issues)

Just check that the `amp rating` on the power supply  are high enough...
[power (watts) = current (amps) x voltage (volts) ]

So you should be able to power everything with a measly 230 watt unit (if it`s good)

Title: Re: A1200 - power in on floppy power port?
Post by: Karlos on February 14, 2004, 02:14:23 PM

Works absolutely fine for me and I had this set up for a fair few years now. I use the original power connector to supply 5v/12v/-12v/0v rails and the floppy power header to boost the 5v/12v/0v rails.

A friend with a similar config to me powered his motherboard/accelerator only through the original power port and actually ended up fusing something on the 1200 motherboard after a few months.

Title: Re: A1200 - power in on floppy power port?
Post by: Linchpin on February 14, 2004, 02:14:55 PM

Hmm... well when i towered my a1200 with the AT PSU, PCMCIA Ethernet, Apollo 040/28, Usual HDD CDROM FDD, Scandoubler, 32mb ram, PC Keyboard connector, all seemed to run OK on the standard amiga power socket..

Title: Re: A1200 - power in on floppy power port?
Post by: Cyberus on February 14, 2004, 02:45:02 PM

So how do you power the floppy drive in this situation?

Title: Re: A1200 - power in on floppy power port?
Post by: Karlos on February 14, 2004, 02:59:10 PM

@cyberus

Directly from the PSU. I'm not sure if you misunderstood - we are talking about powering the A1200 motherboard in a tower system by feeding power into it from 2 places at once. Naturally drives and so on will be powered directly from the PSU.