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From: "Steve Andrew"
Subject: Re: How to build a windup generator?
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Date: Fri, 22 Nov 2002 02:18:00 GMT
NNTP-Posting-Date: Fri, 22 Nov 2002 13:18:00 EST
Organization: BigPond Internet Services (http://www.bigpond.net.au)
Chuck Simmons wrote:
> MNQ wrote:
>> Hello All
>> I am trying to find ways of building a windup electricity generator
>> to produce approx 10V at afew 10s ma for 2 minutes or more. Can
>> anyone give me some hints as to where to start from.
>> Any help/advise would be appreciated.
> 10 volts and 10ma for two minutes is 12 joules. This is the same as a
> 1kg mass falling through about 1.22 meters. That is some healthy
> windup spring! We are not talking about a music box spring here!
Interesting point. I know that a guy in the UK came up with a clockwork
powered radio that ran for around 10 minutes before required re-winding. The
unit is produced in large quantities and distributed throughout Africa as
well as other places. Given that the radio used a louspeaker and produces
adequate volumn, I would have thought that it's power requirements would be
the same (if not greater) than 10v/10ma. Anybody know anything about the
inner workings of this product ?
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