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Thread Tools | Search this Thread |
4th March 2005, 05:36 AM
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#1 |
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diyAudio Member
Join Date: Dec 2003
Location: Toronto Canada
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PSU sharing grounds
I have 2 switching type power supplies, one is 12V 12.5A and the other is 5V 10A
i want to use them together to power a small motherboard which only requires 12 and 5 volts. it is for a small totally fanless PC i was thinking of just powering them up and making sure there is no voltage differential between the 2 grounds before connecting them together is that enough to make sure it is safe? otherwise i could use a regulator off the 12V one, but i would prefer not to. |
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4th March 2005, 06:26 AM
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#2 |
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diyAudio Member
Join Date: Dec 2004
Location: Sofia
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Hi neutron,
Try measuring the resistance between the two grounds. |
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5th March 2005, 12:23 AM
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#3 | |
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diyAudio Member
Join Date: Feb 2004
Location: Wellington, New Zealand
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Quote:
That normally works just fine. When I do this, I usually connect a 10ohm resistor (to limit the current) between the two and measure the current flowing. Steve |
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