Thanks for the labeled pictures. I have a related question, is the boost converter actually a boost/buck converter? I think you said the panel meters take 5VDC, so if you are running the AC transformer at anything above 5VAC, then presumably the converter compensates for that and 'bucks' the input voltage down (?). I'm going to building something similar also, using the same panel meters. I have a drawer full of wall-warts of various flavors, so I may try to put one of those to good use.
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