[Noisebridge-discuss] Connecting 128 EL-Wires to an Arduino

[davidfine]

Seems likely that you could plug 2 such sheilds into an arduino. Or if 
it really uses all the IO pins on a standard arduino, you could use the 
arduino mega. Just modify the example code to address different pins, 
route some wires to the second shield if to source power if the pins 
don't line up right, sounds do-able.
--D

On 7/22/10 6:51 AM, Jonathan Foote wrote:
> Gregg,
>
> Garrett over at macetech.com makes expander shields that give you 64
> pins of I/O.
>
> macetech.com/store/index.php?main_page=product_info&products_id=23
>
> You may be able to gang 2 of them or just use his design for inspiration.
>
>
> On 7/20/10, Gregg Tavares<nbridge at greggman.com>  wrote:
>    
>> Hello Noisebrige,
>>
>> My name is Gregg Tavares. I'm new to the list. I hope can contribute more
>> than I take.
>>
>> I'm mostly a software engineer, not hardware so I'm looking for advice.
>>
>> I'm planning to build a el-wire display with 128 individually addressable
>> el-wires.  (yea, I know it's a ton of work)
>>
>> My current plan is an Arduino connected to 8 MCP23018 16-bit I/O expander
>> chips
>> <http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en537375>connected
>> in series with
>> 2 of these El Escudo boards
>> <http://www.sparkfun.com/commerce/product_info.php?products_id=9259>on each
>> of those along with these ifw-3294 power
>> inverters<http://www.coolight.com/product-p/ifw-3294.htm>
>>
>> It seems fairly straight forward. I'll take it a step at a time. If can get
>> 1 MCP23018 working with 2 El Escudo boards and 16 el-wires then it should be
>> pretty easy to chain in more of that combination to expand the number of
>> wires.
>>
>> The question I was hoping to ask is is there a better way? Should be looking
>> at different solutions? One big power inverter to power all the el-wires?
>> Some chip I'm unaware of that handle's more outputs?
>>
>> I'm grateful for any insight or advice you might have.
>>
>> thank you
>>
>> -gregg tavares
>>
>>      
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