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Overview  For those of you that saw my blog yesterday on my experiments with a cheap LM2596S based DC-DC converter board you are no doubt aware that under one of the test conditions my first test board emitted the magic smoke. If you haven't seen that already I suggest you go and take a look there first:   Lab Experiments - Performance Evaluation and Testing of LM2596 DC-DC Converter Board   I was setting up my second board today so I could continue where I left off and get that ...