convert current meter

--- It's possible, and all that's required is to place a resistance in parallel with the meter which, in the 1 amp case, diverts 1/2 of the current around the meter and through the resistor, and in the 1.5 amp case, diverts 2/3 of the current.

In order to determine the value of the resistor, however, we'll need to know the internal resistance of the meter. If you have a manufacturer and a part number for the meter we may be able to find that information on the web. If you don't, then unless it's written on the meter somewhere, you'll have to measure it. Do you have any test equipment available?

-- John Fields Professional Circuit Designer

If you can supply the meter with 500 mA, do so, and put a resistor in parallel with the meter. Adjust the resistor's value until the meter reads

For the 1.5 amps case, do the same but adjust the resistor until the meter reads 1/3 scale.

If you can't adjust the meter to read exactly 500 mA, set a convenient value (as high as possible) then adjust the resistor to read half of the value. This doubles the meter's range.

Good luck.

John

I gave up. I bought a better meter.

Thanks for the replies