The TesselToss is a microcontroller-powered ball with an accelerometer inside for easy physics lab experiments. Throw the ball, and the (x,y,z) position data gets published to PubNub. TesselToss subscribes to the PubNub channel and plots the data. Students can access the data to measure gravity, coefficients for projectile motion, among other physical properties.
Winner of the Grand Prize at the Tessel-PubNub Hackathon. Built by The Tessellation of Smaug.
Set up a new project and get the API keys, both subscribe and publish. Also pick a channel name to use throughout this project.
More info is available on the PubNub website.
Quick Start - PubNub
Install Tessel CLI with npm globally (if not installed):
$ npm install tessel -g
Once connected to WiFi (see Tessel docs):
Use tessel run publish_xyz.js to run while connected via USB. Note that the entire directory will be bundled and copied to the runtime filesystem.
tessel push publish_xyz.js will save the code to the filesystem and automatically run it in startup, regardless of whether it is plugged into the computer.
tessel erase will wipe the filesystem.
Replace channel name, publish, and suscribe keys with your personal ones. Make sure that Tessel is connected to battery and wifi. Wrap Tessel in paper towels or other material for protection.
Make sure that channel is connected before throwing the Tessel. Run python program and throw Tessel across a short distance at the same time. You can change the data collection time by changing the dataCollectionInterval in graphy.py.
After data collection, the program will print "I'm done" to the terminal, and you can see the graph of the X and Y coordinates by opening the XY_chart.svg file in a web browser on your computer.
Clone this repo using Git:
$ git clone https://github.com/yozamacs/TesselToss.git
The MIT License (MIT)
Copyright (c) 2014 Tesselation of Smaug
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