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- Jun 8, 2015
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(Sorry for all the silly questions as of late) So at the moment I'm working on various laser projects, and I was wondering when a 4.3 ohm resistor is necessary. I'm working on a 300mW infrared laser that has a Aixiz driver wired to the diode and before I fire it up (and possibly give it too much current) I'm asking if I'll need a resistor, or can I just go without? Any and all feedback is appreciated.