What are the unused pins in an Arduino L293D motor shield? I want to connect the shield using wires instead of directly mounting on top of the Arduino board.
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Please edit your question to include shield's maker and part number and tutorials, etc. Add a link to its schematic if you have one.– James Waldby - jwpat7Commented Apr 10, 2017 at 5:32
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It's similar to Adafruit's motor shield and works with Adafruit's motor library.– smcCommented Apr 10, 2017 at 5:33
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What if I don't use servo motor, Can I still use pin 9 and 10 as normal digital pins ?– krmtpcCommented May 17, 2022 at 19:51
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1 Answer
Check out this Link. Here, you can find this explanation in Code. I hope it will helpful for you.
Pin usage with the Motorshield
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Analog pins: not used at all...
A0 ... A5 are still available...
They all can also be used as digital pins.
Also, I2C (A4 = SDA and A5 = SCL) can be used.
These pins have a breadboard area on the shield.
Digital pins: used: 3,4,5,6,7,8,9,10,11,12
Pin 9 and 10 are only used for the servo motors.
Already in use: 0 (RX) and 1 (TX).
Unused: 2,13
Pin 2 has an soldering hole on the board, easy to connect a wire.
Pin 13 is also connected to the system led.
I2C is possible, but SPI is not possible since those pins are used.
