[Noisebridge-discuss] Science, engineering and design huddle opening subject, Optemizing stepper motors as generators

[Rachel McConnell]

Mike, I am interested in science, design and engineering, but it's too
broad a subject.  You're offering to teach unspecified stuff, whatever I
want to know -- but I'm not stuck on anything just at the moment, I am
making forward progress on my projects.  So I don't have anything to
contribute to the huddle, either information or questions.  I can only
speak for myself of course but I suspect others may be in similar
situations.

Would you consider running a workshop where you showed how to build a
flashlight like yours?  I am sure you could use it to demonstrate many
examples of design tradeoffs.  I would come to that.  In fact you have
many items that it would be super interesting and educational to build,
if you want to start with a different one.

Rachel

Michael Kan Kan wrote:
> Please reply via the discuss list only - no e-mail to my personal address.
> 
>  So far there has been no turnout for the last two meetings.
>  Have been suggested to have some kind of opening topic to start off with.
> 
>  I see several groups who have difficulties getting their projects working.
>  They are invited to come to my " Science, engineering and design huddle
> to have counsultation sessions.
> 
>  Several people were interested in the renewable energy flashlights and
> will have several examples of stepper motors and how to modify to
> optimize them for LED flashlight service.
> 
>  There are several renewable flasshlights on the market.
>  However they suffer from several major bad engineering problems.
>  
>  One well known and copied configuration suffers from high magnetic
> leakage which endangers magnetic stripe cards and awkward shaking
> noisy charging operation. The other have many noisy gears.
> 
>  My example is easier to construct and is silent in operation and
> has no exposed magnetic field.
> 
>  I brought my completed examples to Noisebridge sevaral times and
> people have seen them.
> 
>  So please remember that " Science, engineering and design huddle starts
> at 7 PM on Thursday evening at 83C Noisebridge.
> 
>  Mike Kan
> 
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