We do love a good gadget project. From tinkering with Raspberry Pi microcomputers to automating our own homes, to coming up with cool renewable energy projects...we can't stay away. (Click on titles for links.)
David Hunt/Video screen captureMaker David Hunt created a clever hack for a door for dog owners who are tired of getting up to let Fido outside. Called Pi-Rex, it is a bark-activated (note, not voice activated, but bark activated) door.
The King of Random/via"This teaches you how to build a battery with the spare change in your pocket. In just a few steps, a handful of pennies can power a small calculator or an LED bulb."GitHub and answers questions over on Reddit."
© brunoip"This DIY project takes on a gadget that can easily be bought in a store, but instead lets you use materials you already have to make something useful. It's also a great way to build your maker skills."
© drdan152"Make a microbial fuel cell, a technology that harvests electrons that are a byproduct of bacteria breaking down organic matter to produce electricity, at home. This project lets you get up close with the science behind microbial fuel cells and learn about this type of renewable energy technology."
© Roy02"With a few materials and a little bit of time, he shows us how to put together a working battery made from water. This project could be used to add a little charge to your smartphone or be a fun way to introduce battery chemistry to kids."
© abemckay"A great project for making your own bicycle powered generator for charging your electronics with clean energy for every day or as an emergency power supply."
© ke4mcl"This cool project shows us how to take an antique portable radio you might find at a flea market or yard sale and give it a new modern life by making it into a Bluetooth speaker. Once transformed, this gadget can pair with your smartphone or iPod and play your tunes wherever you take it."
© ASCAS"Make a solar-powered phone charger for only $5. It's as small as a smartphone and doesn't include a back-up battery, which is more environmentally friendly. ASCAS tested the device on both Apple and Android devices and it worked well with both."
© jeffmazter406 via InstructablesThe instructable includes not only step-by-step instructions and photos, but also links you to two Power Point presentations by Texas A&M University to help walk you through.