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Apr 9, 2017 at 0:16 comment added Autistic @ Ehryk +1 those constant current devices are good .Do be mindful of their voltage rating .Also place an idiot resistor in series that will gracefully blow open without going on fire if the current diode failed short circuit.
Oct 18, 2016 at 18:21 vote accept Ehryk
Nov 15, 2015 at 8:47 history answered Ehryk CC BY-SA 3.0