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[compu_85]

I have 2 of Patrick's excellent IDEFiles, would like to mount one in the empty space of my 2/5.

Question: Does the +12v supply on the Twiggy cable have enough umph to safely power a Conner 3.5 disk? It looks like the running draw is about 7w. 

Thanks!

-J

[patrick]

A Twiggy Drive draws up to 1.6 A on the 12 V rail and up to 0.4 A at 5 V. So I assume this will be enough for the Conner Drive.

To be sure you could start with a CF card or DOM module, and if everything works properly switch to the spinning rust with its authentic sound :-)

[compu_85]

I soldered on to the Lite adapter for a completely reversible mod.

It's working great!

Thanks,

-J

[Lisa2]

BTW, on the 2/5 wiring harness there is an unused 3 pin connector with +5V, +12V, and Ground available to use for powering drives as well. 

[patrick]

BTW, on the 2/5 wiring harness there is an unused 3 pin connector with +5V, +12V, and Ground available to use for powering drives as well. 

You are right concerning +12 V (white-orange) and Gnd (black).

But (at least on my 2/5 harnesses) white-green goes to pin Y of the power supply connector. For the later PSUs this pin provides a power-fail signal that is used inside the 2/10 to reset the Widget. For ealier PSUs (1.2 A single line voltage model) according to schematic 050-4011-J Pin Y+21 are not connected.

[Lisa2]

Patrick,
I stand corrected.  I had used this connector to power a cooling fan in one of my systems over 25 years ago, after all this time my memory must be failing me.

Has anyone every established what the intended purpose of this connector is?

Thanks,
Rick

[compu_85]

I wondered the same thing.

On my late 2/5, with an original Apple supply, I found only +12v at the connector. If it would have had +5v I'd have used it instead of the floppy supply.

[blusnowkitty]

I wondered the same thing.

On my late 2/5, with an original Apple supply, I found only +12v at the connector. If it would have had +5v I'd have used it instead of the floppy supply.

If anyone knows what kind of connector that mystery plug is, I'm sure I can knock together an adapter board to regulate the +12 into +5. Or do the voltages on that connector change if you're using a 1.2 vs. a 1.8?