Shakeable Dynamo Part 1: Why bother?

First of all I have to start by condemning Brother Industries for what ultimately motivated me to build this basic prototype, allow me to explain and I apologise for the...

First of all I have to start by condemning Brother Industries for what ultimately motivated me to build this basic prototype, allow me to explain and I apologise for the rant, the good stuff follows…

I read an article on the BBC news website (Vibration packs aim to replace batteries for gadgets) about a new type of battery developed by Brother that would require no external power source to charge it, just vibration from shaking it a few times. The aim being to replace batteries in low power applications such as TV remotes etc… thus removing alot of these batteries from the environment and ultimately saving energy.

A really nice, clean and elegant solution which could really benefit not only the developed world but for people in the developing countries. What a great company Brother Industries is until you read at the bottom of the article “There are no plans to commercialise the batteries as yet, according to Brother.”

Wait… So you’ve invented, or rather figured a way to not only replace millions of batteries in the common household, cutting down on waste and pollution providing free energy. But also a way to provide cheap portable power sources to people who can’t afford batteries, giving us as near as you’ll get to an ‘ever lasting battery‘!

And instead of rushing this to market, you do what… Nothing! Absolutely nothing. What a shame and a waste, I can’t help but feel that people at Brother have an interest in Duracell etc… as they obviously wouldn’t appreciate a battery that you don’t need to replace. It’s that kind of mindset of greed and ignorance that ruins the planet for the rest of us.

So this is leading somewhere, I assure you! I thought, how hard can this be to build my own – wouldn’t it be great to build a set of batteries that I could use to power my remote, wait wouldn’t it be even cooler to use this to power my Arduino? or even better build an interactive TV remote that you used like a wand to change channel with no power source needed. When you start imagining the potential applications and how this could revolutionise electronics and interactivity, its even more of a shame on Brother for doing nothing with this. Imagine Nintendo using this in their Wii remotes for instance? Imagine this being used to build a simple water tester… etc.

Anyway, here’s the start of it I’m going to show you how to build a basic dynamo with a bridge rectifier that converts our AC current to DC, and the size of it is not much bigger than an AA battery – it’s my first attempt and it turned out pretty well. It generates enough electricity to power an LED – doesn’t sound like much but when I figure out a condensing and charging circuit that’s when the fun starts – for which I’m hoping that you fine people of the web will help me out! :)

Ready to learn a bit about electro-magnetism and inductance?

Shakeable Dynamo Part 2: Building the initial dynamo
Shakeable Dynamo Part 3: How electromagnetic induction works
Shakeable Dynamo Part 4: Building the bridge rectifier

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