2 replies to this topic

[blubblub]

Hello,
So I think that I’m a little over my head here. I bought the Sparkfun RGB LED Matrix controller. It requires a 5V power supply which can be provided from the netduino plus but the SPI interface description states that it requires 5V on it CS pin for “high”. The max ouput on the netduino i/o pins is 3.3V right? What’s the best way to interface with this controller? Did I mention I’m a newb
Thanks in advance!

[Fabien Royer]

Hi Blub,


You need to use a logic level converter between the SPI interface and the matrix.


Sparkfun sells one with 4 channels (http://www.sparkfun.com/products/8745) but there are many others, cheaper ones, out there.


You can see an example of a level-shifter with an LCD screen here:


http://fabienroyer.wordpress.com/2011/01/18/using-a-5-volts-serial-lcd-backpack-with-a-netduino/


Cheers,
-Fabien.

[blubblub]

Fabien, Thanks for the feedback.