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Hi guys, quick question... I want a laser power meter but I'm on a shoestring hobby budget. Can I use a peltier plate as a power meter? I've seen Thermopile power meters on the market, and thermopile = thermoelectric effect exploiting sensors, right? and / or with the right tinting, could two...

Question to you guys that like to push their diodes hard... I ordered a diode whose seller says it's 2.2V nominal... (808nm / 300mW eBay special, my fingers are crossed that it works at all) Do you guys think I'm safe using a typical 3V supply (eg. LM1117 base), or do I have to design a lower...

Hey guys, quick question about laser diode life expectancy: For the same amount of power output per time, is it Better to run a diode at the high end of what it's rated at for short bursts or to reduce the current available? Should it make any appreciable difference? (PWM vs. variable current)