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the diodes were mounted in a small metal lens assembly, which seems like it would be a pretty effective heat sink, however the diodes have been burning out either the instant power is turned on or within the first few seconds of being turned on. I attribute the variance to the fact that whilst...

Can anyone tell me why my diodes keep burning out? I've harvested three or four diodes from old dvd drives that I've purchased online and tried running them using a 3.7 li-ion battery and an amc7135 with no success. Is my battery voltage too high or am I running my diodes over current? I've...