[Vanhackspace] Vanhackspace Digest, Vol 21, Issue 6

[Derek Anderson]

Huzzah. I had posted the code and a picture online. AtTiny26L which would
run for days or even weeks off of a button cell. Available in 5x5x1mm form
factor. The code includes super low power mode for 3uA power consumption on
average. LED consumption (and throb length/intensity) will be the main
issue.

You will need an avrisp or similar to use the code.

On Wed, Nov 11, 2009 at 1:29 PM, Derek Anderson <derek at chargedmultimedia.com
> wrote:

> 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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>>
>
>
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