Arduino Racing Display

This is a little hobbie electronics project I threw together and forms part of the Java SimConsole and GearIndicator on my GitHub page.

Using the DFRobot 8 Character 7 Segment SPI Module and 2x NeoPixel Stick - 8x RGB LED and an Arduino Uno, this device acts as a HUD for displaying the current car revs, speed, etc. To reduce current required, the 8 character 7 segement is multiplex to only allow 1 LED per character to display at once.

Protocol

Set pixel brightness

• 1|<u_int8>

eg: 1|10 sets brightness to 10

Set pixel colour by index

• 2|<u_int8>=<u_int8>,<u_int8>,<u_int8>

eg: 2|4=255,0,0 sets pixel at index 2 to the colour red

Display pixels based on an integer

• 3|<u_int16>

eg: 3|49155 which will display the 2 outside pixels on either side as 49155 = 1100000000000011

Display text on segment display

• 4|<char[8]>

eg: 4|hellowor will display hellowor on the LED display

Update gear indicator

• 5|<u_int8>

eg: 5|3 will set the gear indicator to display 3

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Prototyping some ideas

First iteration

Updated for a better location