> > may have been low ESR, just how do you tell anyway? > > ESR meter ? I suppose, but wouldn't it read high anyway? The ones that go bang would be really high. A bit moot as I don't have an ESR meter. I was interesting that there was no ripple on the output. This was the 12v rail, obviously it couldn't supply the power for the drive to start spinning. Tony -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist