Multiple Adafruit shields on one Arduino board
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Multiple Adafruit shields on one Arduino board

by Lasereyesurgery on Wed Feb 19, 2014 7:38 am

Hi,

I'm trying to scope out if what I want to do is possible before I purchase all of the components necessary so any advice is greatly appreciated.

I have an Arduino mega 2560. I'd like to connect and control 4 x LED 5 x 8 matrices and 4 x TFT LCD displays.

Firstly it seems possible to connect all the pins from the boards to the Mega. Could I share the clock (to sync them) and reset pins for the displays?

I guess my major concern is whether they can all be powered from one board, even with an external power supply?
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Re: Multiple Adafruit shields on one Arduino board

by adafruit_support_rick on Wed Feb 19, 2014 11:53 am

You mean you want four of these?
http://www.adafruit.com/products/1430
That is not a problem. You will need to use an external power supply

Which TFT displays are you interested in?
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Re: Multiple Adafruit shields on one Arduino board

by Lasereyesurgery on Wed Feb 19, 2014 12:11 pm

adafruit_support_rick wrote:
Which TFT displays are you interested in?

Preferably the 2.2" one, but I'd rather go for stability over screen size if that's a factor?

I'll also need a WiFi shield to control the LEDs and the screens. Nothing too CPU heavy is going on, just loading bitmaps from the SD cards in sync.
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Re: Multiple Adafruit shields on one Arduino board

by adafruit_support_rick on Wed Feb 19, 2014 12:26 pm

Yeah, technically, those ought to work as well.

You will want to use soft SPI for the displays if you're going to use the CC3000 Wifi, since it doesn't always play well with other SPI devices.
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Re: Multiple Adafruit shields on one Arduino board

by Lasereyesurgery on Wed Feb 19, 2014 12:51 pm

adafruit_support_rick wrote:
You will want to use soft SPI for the displays if you're going to use the CC3000 Wifi, since it doesn't always play well with other SPI devices.


OK, Excellent.

Thanks for the help!
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