Thanks for looking at this Nathan! You have the correct driver board.
However, the "A0" thru "A5" on the schematic refers to the pins that set
the I2C Address for the board, not to Analog pins on the Arduino. Just a
bit confusing! The only connection to Arduino (besides power and ground)
is the I2C bus on SCA and SCL. (It is also possible to drive two servos,
but I'm not doing that.)
On 3/10/2015 2:15 PM, Nathan McCorkle wrote:
On Mon, Mar 9, 2015 at 1:24 PM, Jim Larson <[email protected]> wrote:
Following is a description of a problem I'm having in a motor control system
I'm working on down here in Sunny San Diego. Any thoughts or insights would
be most appreciated.
I have 8, 10K linear pots. The wiper of each pot is tied to an analog input
of an Arduino Mega (Analog pins 0 to 7).
Hmm, I think I'm looking at the correct motor shield schematic here:
https://learn.adafruit.com/assets/9536
If so, it seems that has 5 of the analog pins tied up... even if they
aren't being used on the motor shield in your setup (I can't tell on
cursory glance) maybe they aren't turned off (if they can even be
disabled).
If I'm right and that is the correct schematic... you could either
destructively cut the traces coming from the analog pins, or get some
headers between the Mega and the motor shield stack, and for the
analog pins instead of upright headers, use 90-degree angle headers so
the analog are completely diverted from the motor shields.
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