Build Your Own Bicycle-Powered Battery Charger

[Jonas]

http://lifehacker.com/build-your-own-bic...1456439155

I stuck this in communications since this would be a good way to power emergency comms, but it can be used for other purposes as well... JP

Build Your Own Bicycle-Powered Battery Charger
for Emergency Power

At some point, you'll be caught without power. If you're lucky, it'll come back, but if you're stuck in a situation like last year's Hurricane Sandy, it might be a while, and you'll need another way to keep your gear powered. This deep-cycle battery, charged by a bicycle-powered generator, will do the trick.

The video above is a brilliant walk-through of how the whole thing works and what it takes to build it. You'll definitely need some components and some time to make this happen (not to mention some skill with electronics projects), like a magnetic DC motor (the kind you'd find in an electric wheelchair) and a charge controller based on this 555 controller design that keeps the battery from overcharging and turns the charging back on once it's been discharged a given amount.

Once it's all up and running, you can attach a bike and use it to charge the battery any time you need to. The beauty of the setup is that it uses pedal power to charge the battery, not to power the devices, so the lights don't go out right after you get off the bike—you can charge the battery a bit every day, get some exercise, and still use your emergency radio, keep the TV turned on, or use your phone to let everyone know you're okay.

[Grumpy Grandpa]

Nice one Jonas! I've got a couple of deep-cycle batteries and I know exactly where to get a couple of wheelchair motors. Now all I need is a bit of electronics know-how and a fit person to peddle the damn thing! (and I'm then stuffed for using the wheelchair!!)

[Highlander]

(9 November 2013, 02:20)Grumpy Grandpa Wrote: Nice one Jonas! I've got a couple of deep-cycle batteries and I know exactly where to get a couple of wheelchair motors. Now all I need is a bit of electronics know-how and a fit person to peddle the damn thing! (and I'm then stuffed for using the wheelchair!!)

You could use a hand winder, if the handle was on a big enough wheel like a bike wheel then it wouldn't take a lot of effort to get good results,.. I wouldn't think

[I-K-E]

(9 November 2013, 10:57)Highlander Wrote:

(9 November 2013, 02:20)Grumpy Grandpa Wrote: Nice one Jonas! I've got a couple of deep-cycle batteries and I know exactly where to get a couple of wheelchair motors. Now all I need is a bit of electronics know-how and a fit person to peddle the damn thing! (and I'm then stuffed for using the wheelchair!!)

You could use a hand winder, if the handle was on a big enough wheel like a bike wheel then it wouldn't take a lot of effort to get good results,.. I wouldn't think

you could also gear the system to get results from hand winding

I think if you had a second bike use the gears of that to increase the revolutions from hand cranking without having to increase the handle size too much. This way you could have a handle winding system that would not be too large to make it difficult winding with limited mobility