You can try to use shielded wire for VSS signal with ground on the shield. Capacitor can help as well. You can try to change VSS delay settins and see if that will help to stabilize VSS reading.
Anyway from experience I can tell that proper ground is a crucial thing for MPGuino.
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Quote:
Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
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