With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
Tell us about yourself!
Your driver circuit design limits the diode current to 378 mA (1.25/3.3) which means the resistor would dissipate 472 mW (0.378 ^ 2 x 3.3 watts). A 2 watt resistor is a bit of overkill.
3D Printing Class
I suspect this will only work if you have some kind of notification sound enabled with enough energy to light the LED. For instance the Pop on my droid probably won't work.
Your circuit is missing a ground from the diodes' anodes on the left side of the bridge.Have you considered using some of the piezo-plastics that are available (see http://www.te.com/usa-en/products/sensors/piezo-film-sensors.html?tab=pgp-story for and example)
how about a complete materials list? What did you used for the Voltage Sensitive switch? What are the connections for the USB socket?
Join 2 million + to receive instant DIY inspiration in your inbox.
© 2016 Autodesk, Inc.