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Hello, I want to know how we can calculate the power dissipation of the LM317, I saw in the datasheet the ratio temperature/W, however how to calculate the power takes by the LM ? Is it something like Vin*Currentset ? (In my case it will be something like 1.25*8=10W) Is it a good idea to power...

hello, I had mount my laser with a housing from sinner, an M140 diode and a "18V 5W Cree Circuit Board for Flashlights" however I have a problem the diode doesn't light but the led seems to work since I powered it during 1/2 sec with one li ion cell...so that's driver in fault. (i use 2x1640 li...

Hello, Du to an aixiz sending faulty I receive 18 of their entire nickel modules (spring, host, focus lens...) I prefer to sell the lot. Make ANY proposition(s) Thanks

Hello, I try to make my own red laser, so I bought a 200mw diode laser and make my driver (LM317) powered by 2 li-ion which works great however I forget the lens... So can I take out one from a cheaper chinese laser ? If yes what is the distance between the diode and the lens ?(How do I...