[Vanhackspace] Vanhackspace Digest, Vol 21, Issue 6

[Derek Anderson]

I actually built a small jewelry sized throbber with a small atmel chip and
a solarbotics cell. With careful circuit design you can get pretty low power
out of a MCU. Certainly a LOT lower than a 55x series timer. Nicer fade
effects too ;) There are rechargeable button cells out there...

On Wed, Nov 11, 2009 at 1:23 PM, Sandra K <newtmedia at gmail.com> wrote:

> Hi all! Newbie lurker here.
>
> > 2) "Produce the light at the object"
> > Here the problem is that of size and weight - the circuitry has to be
> small (a 556 SMD with Rs and Cs is about 1cc in volume) and the battery has
> to be small enough to not be visible but powerful enough to last 'long
> enough'.
> >
> > I'd favour the LM3909 (lovely chip, very low component count, but hard to
> find) for long battery life and/or a surface mount 555 (or 556 at a push)
> for funkier effects - the triggers of the CMOS version would be sensitive
> enough for a tiny microphone to act as a trigger - scope for interaction
> there.
> >
> > Drive with two coin cells, job done.
> >
> > -JamesG
>
> Just wanted to mention it'd be awesome to have a workshop on LED
> jewelry. I have construction and design skills, but incorporating
> light in a non-bulky, interesting way is the challenge.
>
> Also, light boxes were mentioned and I thought of the therapeutic kind
> as well as photography boxes. A workshop to learn to make them low
> cost could be popular in Vancouver, where a lot of people have
> seasonal affective disorder and would like to try light therapy but
> can't afford $200 lamps. Is anyone with the skills interested in
> teaching that?
>
> http://www.day-lights.com/canadaindex.html
>
> Cheers,
> Sandra
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