Power to a PC104 bus

[Marco Trapanese]

Hello,

I need to power a PC104 board with +5V and +12V.
I'd like to provide the voltages directly through the bus instead of the
connector on the board's edge.

I'm talking about an Advantec PCM3362.

I'm going to connect GND, +5V and +12V to all pins with that name.
Any problems?

Thanks
Marco

 

[Sjouke Burry]

Hello,

I need to power a PC104 board with +5V and +12V.
I'd like to provide the voltages directly through the bus instead of the
connector on the board's edge.

I'm talking about an Advantec PCM3362.

I'm going to connect GND, +5V and +12V to all pins with that name.
Any problems?

Thanks
Marco

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

 

[Marco Trapanese]

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

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

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

 

[Sjouke Burry]

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.

 

[Marco Trapanese]

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

Ask them!

Why not?

Marco