Junk Driver?

Lexel · 2019-04-28T17:55:19.000Z

any good desktop meter has it
also specific low resistance Multimeters

used mostly with this type of Kelvin clamps

Sirstinky · 2019-04-28T18:08:54.000Z

Thanks! I don’t have that kind of equipment lying around, but good to know

Sirstinky · 2019-04-30T03:05:40.000Z

So I measured the voltage at the resistors while running on low, medium, and high. Low was 10mV, medium was 95mV, and high was 202mV.

Using those numbers, how do you calculate the current? Something to do with the input voltage or resistance?

Thanks for all the help!

Barkuti · 2019-04-30T03:42:07.000Z

Sirstinky:

… Low was 10mV, medium was 95mV, and high was 202mV.

Using those numbers, how do you calculate the current? …

By Ohm's law: I = V / R

I_low = 10mV / 40mΩ = 0.25A

I_med = 95mV / 40mΩ = 2.375A

I_high = 202mV / 40mΩ = 5.05A

Values within a certain small tolerance, of course.

Sirstinky · 2019-04-30T03:52:25.000Z

Wow thanks for the calculations! I feel a little better now that I see the driver (probably) meets the specs.

You ’da man!