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maybe i should of said,i can get 1.5 amp from a 7805,the issue is it cant go over 1.3amp max,its how to limit the current to that im stuggling with.
hi all,im trying to find a simple way to get 5v at 1300ma from a 7805 any ideas?,cheers m3vuv.
its to drive a m140-a laser diode.
i wasnt asking how to regulate the votage!,i need a way of trying to get a 1300ma max from a 7805!,is it not clear now??,regards Paul.
Wire a it up as a current source, with a 3.9 Ohm 10W resistor for R1. That will limit in the load to ~ 1.28A.Will need careful attention to heatsinking.. if Rload is a dead short then the 7805 will be dissipating ~10W.
Quote from: quadzillatech on March 24, 2019, 11:59:25 pmi wasnt asking how to regulate the votage!,i need a way of trying to get a 1300ma max from a 7805!,is it not clear now??,regards Paul.If you weren't asking how to regulate the voltage, maybe your first post shouldn't state that you want 5V.