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- From: camerons@NAD.3Com.COM (Cameron Spitzer)
- Newsgroups: rec.bicycles.tech
- Subject: Potato power!, was Re: The Future of the Bike
- Message-ID: <1472@bridge2.NSD.3Com.COM>
- Date: 26 Jan 93 21:22:03 GMT
- References: <IfN3UtC00iUz04j4Fr@andrew.cmu.edu>
- Sender: news@bridge2.NSD.3Com.COM
- Reply-To: cls@truffula.sj.ca.us
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- Nntp-Posting-Host: gilligan.nad.3com.com
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-
- In article IfN3UtC00iUz04j4Fr@andrew.cmu.edu, hb10+@andrew.cmu.edu (Howard M. Bomze) writes:
- > Instead of a great battery for your bike lights how about a wind
- >powered generator to run the lights, computer, other low power electric
- >stuff. It could charge a battery so that every thing would still work
- >when you stopped moving.
-
-
- This could work with a lead-acid battery (gel or not). NiCds (which are
- lighter for the same capacity) wear out prematurely if charged faster or
- longer than they were designed for. They also lose capacity when you
- routinely "top them off," though this is a minor effect compared to the
- first two. I think you'd be disappointed with the lifetime and capacity
- of a NiCd battery (for headlamp) charged off a bicycle-mounted generator
- unless it had some elaborate electronics in it. I don't think you'd be
- too pleased with the drag of a 10 watt generator either!
-
- The typical bike-computer has a single-chip CMOS microcomputer with LCD
- display. The drain of such a beast is such that you could run it off a
- little slice of potato with zinc and copper wires stuck in. The battery
- problem there should be shelf life, not capacity. Does your bike-computer
- eat batteries? (How about it, bike computer vendors? Where's that potato
- power option?)
-
- Cameron
-