A drawdio for textile!?

=> Simulation: http://tinyurl.com/y7shqyg8

TODO: adapt resistor choices to sensor!

=> Results: https://photos.app.goo.gl/aajJ7WnGEuLi17vB7

=> Reference schematics:

https://cdn-learn.adafruit.com/assets/assets/000/010/156/original/drawdio2schem.png

https://learn.adafruit.com/drawdio/download

=> Main parts:

Timer/oscillator (TLC551): http://fr.rs-online.com/web/p/timers/6624674

Transistor (MMBT2907): http://fr.rs-online.com/web/p/transistors-bipolaires/7390410

=> Bill Of Material (+ Pandagon vertices coordinates computation):

https://docs.google.com/spreadsheets/d/1LbJ0Y4ytbnZ2-TMkcOJrS0umPdmfBTfQO-twZSWy9uI

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Credits:

- Art by Cheng Xu: http://1x1.design

- original circuit by Jay Silver: http://drawdio.com

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Extra:

=> 555 timer explanation:

https://youtu.be/kRlSFm519Bo?t=1m42s

http://www.ohmslawcalculator.com/555-astable-calculator

=> TODO:

- Add a switch (+ LED?)

- Make a "shield" PCB with:

    - CR927 battery* + header pins on the same side

    - piezo on the back

    - sensor?

*battery: https://octopart.com/search?q=CR927