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noisy Power Distribution boards
The buck/boost power converters on our power distibution board make a very annoying whine. Moreover, simply illuminating an led is enough to significantly change the pitch of the whine.
For instance, with only the cRIO and one Digital Sidecar powered by the PD board, simply the flashing of the Digital Sidecar's status led makes the PD board sound like a European police siren.
In a noisy room it's not so bad, but in the quiet confines of my dining room it is very irksome.
I should say that in this case I am powering it with a 12 V, 7 Amp hour SLA and not a car battery.
Should I expect this? Is there something I can do about it?
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