Okay you two, we don't want to turn this into a pithing contest.
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Eric Christison
Sent: Wednesday, June 30, 2010 6:55 AM
To: [log in to unmask]
Subject: Re: [TN] NTC - Solar Panels and small motors

"It was hands-down the coolest
hat on the block."

Yeah right.





On 30/06/2010 14:42, Eric Kalgren wrote:
> Once upon a time, in the early 90's, I bought a pith helmet with a
solar
> powered fan attached to the front of it.  It was hands-down the
coolest
> hat on the block.
>
> The small solar panel that powered the thing broke and I want to
replace
> it, but I don't know how much solar panel I need to run the motor.  I
> know it's 3 VDC because it uses 2 X AA batteries as a back up supply,
> but I don't know how much current I need to run the motor.
>
> The old panel sat in a 2" X 2 1/2" pocket on top of the hat.  I've
> Googled it and checked out a few options but nothing listed has the
same
> footprint.  And so I am punting to the TechNet to see if anyone might
> have an idea of how to guesstimate the current draw of a small DC fan
> without having an O-Scope handy.
>
> I'll send a picture to Steve as well, just for kicks.
>
> Thanks!
>
> Eric Kalgren
> Electrical Engineer
>
> The Ferrite Co. Inc.
> 165 Ledge Street
> Nashua, NH 03060
> Phone 603-881-5234 X 153
> Fax 603-881-5406
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-- 
Eric Christison
Consumer&  Micro group
Imaging Division

STMicroelectronics (R&D) Ltd
33 Pinkhill
Edinburgh EH12 7BF
United Kingdom

Tel:	+44 (0)131 336 6165
Fax:	+ 44 (0)131 336 6001




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