[dorkbotpdx-blabber] Red LEDs and little Li cells

[Ar Keys]

What time frame did you see the LED Matrix in action?

Early last year I built and brought in a project that used a signage
type 8x8 matrix - of square red LEDs - in an Altoids tin. It scrolls
text, runs Langton's ant, binary clock etc - if that brings up any
associations. It runs off of 2 AAs.

Later Ward used a matrix of the same type to build a work of art and
posted it with the title: Txtzyme Sparkles on LED Matrix

Let me know if you want details about the part and how to drive it. I
do remember the pinout order is all jumbled up from what would be
expected for rows and columns.



- Arthur


On Fri, Mar 9, 2012 at 9:40 AM, Doug Ausmus <dausmus at gmail.com> wrote:
> Are you referring to the square LED Matrix display with red LEDs in an 8x8
> array?
>
>
> On Thu, Mar 8, 2012 at 12:26 PM, Monty Goodson <montyg at bittybot.com> wrote:
>>
>> The battery sounds like a LiPoly, such as this:
>> http://www.sparkfun.com/products/731
>> They are secondary cells.
>>
>> Monty
>>
>>
>>
>> On Mar 8, 2012, at 12:13 PM, Aaron Burt wrote:
>>
>> > I am sad that I cannot recall the name of the fellow who showed me his
>> > cool
>> > low-power LED graphical display using signage LEDs.  Because now, I
>> > would
>> > like to make an extra-bright tail/brake light for my scooter, and I'm
>> > thinking that bright, wide-angle red LEDs would be ideal.
>> >
>> > Before I go pick out random things from Mouser for the next grouporder,
>> > any
>> > specific suggestions?
>> >
>> > Also, someone showed me a small coin-sized lithium primary(?) cell that
>> > was
>> > in a pouch rather than a metal case.  Anyone recall a source for those?
>> >
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