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Sensor Recommendations
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Sensor Recommendations

by davidruttenberg on Thu Apr 08, 2021 11:11 am

Good day. I'm interested in any educational recommendations for the following sensors types compatible with Arduino UNO R3; specifically, can you recommend those that can track
pupillometry
environmental sound and
physiological
thresholds (e.g., GSR, heart rate and head-sway/intertial movement.

I realize that there may not be a single component housing for all of these, but curious how these might be cobbled together.
In advance of your kindness and reply, I thank you.

-David

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Re: Sensor Recommendations

by BillPretty on Thu Apr 08, 2021 7:25 pm

If you have not already purchased an Arduno Uno, might I suggest a Raspberry Pi 3 instead ?
The Raspberry has multiple IO plus onboard Bluetooth which may be helpful interfacing with off the shelf sensors.
The Raspberry can be easily interfaced with an MCP3008 analog to digital converter. This will give you 8 single ended analog
channels or 4 double ended inputs, with 10 bit resolution per channel. This may be a requirement for some sensors.

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Re: Sensor Recommendations

by davidruttenberg on Fri Apr 09, 2021 9:20 am

Thanks Bill,
Unfortunately, I've already purchased the Uno along with their multiple sensor kit.
It would seem that your advice is noteworthy, and I'm curious if you've had any experience with specific off the shelf sensors that meet my eye tracking, audio sensing, GSR, inertia movement, etc.
Anything vendor/product in particular you might recommend...or for that matter a resource to review (Wesbite)?
Thanks again!
-David

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Re: Sensor Recommendations

by adafruit_support_bill on Fri Apr 09, 2021 9:40 am

I think that the eye-tracking function alone would favor something closer to a Raspberry Pi than an UNO. The Atmega 328 processor chip on the UNO has just 2K of RAM. Not nearly enough to do any kind of image processing. There are a number of camera options for the Pi. And several machine vision software packages for the Pi as well: https://www.adafruit.com/?q=Pi+camera&sort=BestMatch

With the UNO, you might be able to use a camera like the Pixy CMUcam that has some built-in image processing. But the CMUcam firmware is best at identifying/measuring brightly colored objects. You might need to do some hacking of the camera firmware to deal with pupils.
https://www.adafruit.com/product/1906

There are lots of IMU's suitable for monitoring head movement. these will all work with the UNO: https://www.adafruit.com/?q=IMU&sort=BestMatch
And there is the Pulse Sensor Amped for measuring heart-rate: https://www.adafruit.com/product/1093

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Re: Sensor Recommendations

by davidruttenberg on Fri Apr 09, 2021 3:04 pm

Thanks so much for the advice. Wishing you a safe weekend.

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Posts: 3
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Please be positive and constructive with your questions and comments.