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Hi Simon. Thanks. I understand the current thing. I want to place a limit of 3 amps on one of the loads in particular, the camera, which comes with a 3 amp adapter and is running a peltier device. It occured to me that this was an avenue for current draw in excess of the limitation imposed by the manufacturer by way of its adapter - cant be sure of my facts, so playing it safe.
I have a handful of L317's on hand, which should improve the characteristics of the supply to each appliance as well. The SMPS I'm using is a little noisy and affects the Arduino, in particular. Trying also to avoid interference with the camera.
I've attempted to provide current/short circuit protection based on Brendan's (wasyoungonce) suggestion in another post, with an N channel mosfet.
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