# Matrix project for drivers P and L plates

**URL:** <https://forum.core-electronics.com.au/t/matrix-project-for-drivers-p-and-l-plates/3227>\
**Category:** Uncategorized\
**Created:** [9 August 2018 01:38 UTC](https://forum.core-electronics.com.au/t/matrix-project-for-drivers-p-and-l-plates/3227 "2018-08-09T01:38:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Steven67879](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@Steven67879](https://forum.core-electronics.com.au/u/Steven67879)\
**Post date:** [9 August 2018 01:38 UTC](https://forum.core-electronics.com.au/t/matrix-project-for-drivers-p-and-l-plates/3227/1 "2018-08-09T01:38:30Z")

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I have a student doing his HSC and has come up with this idea for a digital “P” plate for young drivers. Basically, we have been using an Arduino Uno with a 8 x 8 duinotech shield with an LED Matrix. There seems to be a real conflict of information on the net about getting these items working together so we are just ready to start again.

What I saw on your site is

Gravity: Flexible 16x16 RGB LED Matrix which would save us the problems of trying to daisy chain separate 8 x 8 units together. Happy to stick with Arduino, or take your advise if you feel raspberry Pi would be better, but we need to create a red P on a white background, then with a dial switch, change it to a green P with white background and finally be able to change it back to a black L with yellow background. We have created a prototype for the code, but now need the hardware to make it a reality.

Any help or advise would be much appreciated.

Thanks,  
Steven

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**Author:** ![Clinton](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/clinton/32/1515_2.png) [@Clinton](https://forum.core-electronics.com.au/u/Clinton)\
**Post date:** [9 August 2018 05:21 UTC](https://forum.core-electronics.com.au/t/matrix-project-for-drivers-p-and-l-plates/3227/2 "2018-08-09T05:21:59Z")

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Hi Steven

Are you able to include the prototype code so that we can have a look? I have not used the Gravity board but I think @Stephen has done some stuff with the ws2812 the chip the [Gravity 16x16](https://core-electronics.com.au/gravity-flexible-16x16-rgb-led-matrix-39226.html) is built on.

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**Author:** ![Stephen](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/stephen/32/1599_2.png) [@Stephen](https://forum.core-electronics.com.au/u/Stephen)\
**Post date:** [9 August 2018 06:00 UTC](https://forum.core-electronics.com.au/t/matrix-project-for-drivers-p-and-l-plates/3227/3 "2018-08-09T06:00:47Z")

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Hey Steven,

I recommend using the NeoMatrix library for Arduino. Check out this tutorial on using NeoMatrix: [https://learn.adafruit.com/adafruit-neopixel-uberguide/neomatrix-library](https://learn.adafruit.com/adafruit-neopixel-uberguide/neomatrix-library)