Intro

• Who

  • @Daniel Puratich owning the altium grind here and arch

• What

  • Start from LED Board Rev 3 and only make the following changes

  • Neopixel should be on a different pin

    • it can be on any of the following: PA8, PA9, PA10, PA5, PA3, PA2, PA1. These correspond to TIM1, TIM2 CH1-4 respectively. Whichever is easiest layout wise

      • PA5 was selected as it was the closest to the old pin

  • Switch to brighter Neopixels

    • See here

  • Fix the layout concerns

    • there’s a few minor comments in the last one

    • high level layout placement concept should remain, we like it.

  • schem styling

    • there’s a few minor comments in the last one

• Testing in meantime on rev 3

  • CAN circuit should work, does AP_PERIPH communicate with Pixhawk?

  • photoshoot should be done with constant color, firmware and wiring

  • Boards don’t smash when mounted on Pegasus 2 from flight vibration

• Timeline

  • Nov 1 midterm board order

  • Assembled into next term

• Where

  • altium link

  • github link

Engineering

Open

LED Options

These two were selected as the primary candidates for the board as they’re commonly used and more powerful that the current implementation. They’re larger than the LEDs used in rev 3, however, the extra space is available. The need for extra power was needed as the LEDs in rev 3 weren’t bright enough. Ultimately, the SKC6812-RV was selected as the LED for this revision as it’s brighter than the WS2812B and costs a bit less.

The WS2812B operating at full power has an average brightness of 1285 mcd. While under the same conditions the SKC6812-RV has an average brightness of 1735 mcd. Furthermore, as the LEDs are the same size, the perceived brightness will be the same.

SKC6812-RV (1655)

https://www.digikey.ca/en/products/detail/adafruit-industries-llc/1655/5154679

WS2812B (COM-16347)

https://www.digikey.ca/en/products/detail/sparkfun-electronics/COM-16347/11630204