Grobe Strommessung über Shunt-Widerstand an analogem Eingang

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hallo,
ich habe einem arduino mega ein monster motor shield angeschlossen der zwei große gleichstrommotoren treibt. ich möchte meinen aufbau nun vor zu großen stromstärken (hohe anlaufströme blende ich aus) schützen wenn einer der motoren zu stark strapaziert wird. da mein motorshield keine strommessung eingebaut hat möchte ich nun einer leitung des jeweiligen spannnungsversorgungskabels zwischen shield und motor die verlustspannung abnehmen (0,1 ohm x z.b. 10a = 1v) und dem analogeingang des mega zur ganz groben messung zuführen?

meine frage jetzt: kann ich die enden des versorgungskabels direkt dem analogen eingang des mega zuführen?

vielen dank!

ich vermute nein, da dir sicherlich der bezugspunkt (gnd) fehlt.
wenn du ein schaltbild zeigst, wie du es aufbauen willst, können wir mehr sagen.


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