Reaction Timer and Acceleromerter in same Arduino Circuit, Possible?

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Hi All,

I am trying to build a ‘reaction timer’ combined with an ‘accelerometer’ . This project is designed to measure speed and power of a punch.

I have an Arduino Uno Starter Kit from which I will build the reaction timer circuit:

https://www.instructables.com/id/Arduin … 4-Players/

And have also bought from sparkfun an ADXL335 which i want to also integrate into this circuit but I’m not sure how i connect both circuits as they both take up the same analogue pins on the Arduino (A1, A2, A3)?

Any help would be great.

Thanks,

Greg

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It doesn’t look like you have enough free I/O pins on your Arduino to add another device.

You might consider using a Mega since it has more free I/O.

Another option would be to use a serial LCD rather than a parallel LCD and move some of your buttons over to digital pins leaving free analog pins. A I2C accelerometer would help reduce the pins needed as well.