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I hooked up a DMM with it set on the 10A scale and I read 2A being drawn from a fresh set of batteries. If the module is driving 500mA, shouldn I read 500mA?

April 26, 2017batteries dmm drawn fresh hooked read scale

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I hooked up a DMM with it set on the 10A scale and I read 2A being drawn from a fresh set of batteries. If the module is driving 500mA, shouldn I read 500mA?

1 Answer

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Badboy 500mA refers to the LED current. The regulator maintains a constant current (500mA in this case) to the LED. The input current varies with battery voltage. At lower battery voltages the battery current could be as high as 2A.