Power to a PC104 bus

That depends. Some pc104 cards have an onboard swithching supply, which might complicate things somewhat. I know,because I had one where that voltage was somewhat low. The harddisk did not spin up. In this particular case, connecting 5volt all over the place solved that problem. But dont assume that the internal 5 volt is directly connected to the supply connector. Only your ohmmeter can make that known. That one was a Microspace MSM-P5SEN / SEV with a pentium5 chip

Il 30/03/2010 23.35, Sjouke Burry ha scritto:

Ok, so if I check that +5V and +12V are routed directly from the ATX power-in connector to the PC104 bus I may supply the board from there. Otherwise I will use the external connector.

Thanks Marco

Use both. The supplypoints scattered around the print might not be able to carry much current(thin board traces). What I did was connect those points to the power-in pins on the board, and then use that one only.

Ask them!

John

Il 31/03/2010 5.10, John Larkin ha scritto:

Why not? ;)

Marco