I want to monitor the battery voltage that will be powering the motor through the shield. It appears the H bridge is isolated from the arduino’s ground. It is ok to connect the negative lead from the battery to both the arduino ground and the shield power connector and the other battery lead to the arduio’s a/d input?
Hi there,
Welcome on the forum.
From what I see in the user manual, the ground of the Shield is not isolated from the ground of the Arduino.
See the manual here: https://www.robotshop.com/media/files/pdf2/shield-md10_user_s_manual_rev_2_-_google_docs.pdf
Page 7 will says: Only RST and GND pins are connected to the shield.
This means you may connect a Batterie to the Cytron and one to the Arduino, the ground will be tied together.
Let me know if this makes sense and if everything works out.
Thank you - this worked perfectly. I see now that GND on the Arduino is connected to the PWR - pin on the shield power connector. So all I had to do was run a wire from the PWR + pin through a resistor divider network and read that with one of the Aurduinos A/D pins.
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