Re: ATX power supply to drive a 12V DC motor?

On Fri, 05 Jan 2007 07:53:25 -0800, Eric R Snow <etpm@xxxxxxxxxxx>
wrote:

On 5 Jan 2007 05:36:38 -0800, "MK" <michaelkatsilis@xxxxxxxxx> wrote:

Hi,

I have a 12V DC motor (6A under load). The only power supplies I have
around here are ATX. Someone at an electronics shop told me they can be
used to supply the power, but I didn't ask how. Is it just a matter of
using an IDE connector to power the motor?

Regards,

Michael
Information from the January 2007 issue of Nuts and Volts column
called Electronics Q&A:
Connect a red wire and a black wire with a 10 ohm 5 watt resistor. If
there is a brown wire connect it to the orange wire. Connect the green
wire to a black wire with a switch. This is the on/off switch. Wired
as above the motor can be connected to a yellow and black wire and
turned on and off with a switch without damaging the power supply. If
you want the motor can be connected without a switch and the 10 ohm
resistor eliminated. Then the power supply on/off switch can be used
to turn the motor on and off. If you do this don't connect the red
wire to anything and don't disconnect the motor when the power supply
is on. Make sure all the unconnected wires cannot make contact with
anything. Here's a web site mentioned in the same column about ATX
power supplies:
http://web2.murraystate.edu/andy.batts/ps/POWERSUPPLY.HTM
All the above info was gleaned from Nuts and Volts and I cannot take
any credit for it.
ERS
WHOOPS! I forgot to add that if the load resistor is used it needs to
be mounted to a heat sink because it will get hot.
ERS
.

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