Omaha, NE
Quoted from schudel5:If you use that EzSBC voltage regulator, just be aware that your machine will make a loud farting noise when you turn it off. Just an FYI and it's actually normal.
They probably should have incorporated use of the UVLO (under voltage lock out) on the EzSBC to get rid of this. Water under the bridge and doesn't really hurt anything anyways. But I wonder if a clamping diode from output to input would fix this. Anode to vout, cathode to vin. This way the output would be shunted back to the input (and filter cap) at power down. You will sometimes find these already installed in LM323K circuits to prevent the output cap from discharging into the LM323K at power down.
