Hi Robin,
The scale is from an existing weight scale that weights dollar bills and coins, and it only has one scale inside. I checked the voltages of the original scale and it was 5volts going to the scale.
What do you think if I lower the amplification? I'm thinking that might work? What do you think? Maybe, some sort of variable resistor chip controlled by the Arduino.
BTW: 1 USD bill weights 1 gram, and 25 cents weights 5 grams (aprox)
Cheers,
Cameron.