In this PicList, there are quite a few experts in matters relating to
motors, robotics and PC hardware. My question is addressed to them.

I have a Seagate IDE 1 GB hard disk (ST 51080A) removed from a PC because of
media failure. But its spindle motor and drive electronics are in good
working condition. I have been particularly fascinated by Bob Blick's
"Propeller Clock" (www.bobblick.com) and I wish to check the suitability of
this hard disk motor for the project.

My problem is that when I connect the power supply cable (without connecting
the 40 pin cable) and switch on the SMPS, the spindle motor starts spinning
but after about 20 seconds, it invariably comes to a halt. I guess, this is
because there is no signal coming from the PC through the 40 pin cable. How
do I make it run continuously? The answer perhaps lies in tying one of the
40 pins to ground or +5V.

Any suggestions please?

I would highly appreciate helpful tips.

Thanks & regards,

Bala

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