Just wanted to run this by everyone before I get started building it. I want to create a node that is basically a temperature display. I am planning on using this chip to drive the display. Are there any pitfalls to adding this to the SPI bus?
http://www.hobbyengineering.com/specs/MAX7219.pdf (http://www.hobbyengineering.com/specs/MAX7219.pdf)
Using Pin D7 (7) for CS pin.
Thanks,
Mab
You should be fine. This chip also has a history of Arduino documentation: http://playground.arduino.cc/Main/MAX72XXHardware
You can use any free pin as CS. Just be sure to 'manage' your CS pins.
Personally I prefer I2C devices whenever very high speed comm. is not a concern. It's just easier and you can have a whole bunch of devices using only two pins.
Good luck with the project. Please post about the result :)
Lars