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Message from discussion At the risk of being seen to do something non-cool but practical...
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Christopher Yeoh  
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 More options Jun 28 2012, 6:54 pm
From: Christopher Yeoh <cbky...@gmail.com>
Date: Fri, 29 Jun 2012 08:24:37 +0930
Local: Thurs, Jun 28 2012 6:54 pm
Subject: Re: [HACK-ADL] Re: At the risk of being seen to do something non-cool but practical...
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On Thu, Jun 28, 2012 at 9:40 PM, Damien P <athe...@gmail.com> wrote:
> On Thursday, June 28, 2012 4:07:12 PM UTC+9:30, pault wrote:

>> For anybody with the old style spinning wheel meters,

> I'd thought of pointing a laser at the wheel, and measuring the reflection
> with a phototransistor.  The laser would probably only need to be on 5% of
> the time.  The light should be fairly dull inside the power box.  Like you
> said though attaching it would be a bit difficult.

and won't freak out the meter reader at all :-)

Chris


 
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