This is an old revision of the document!
Optional, not fitted in camp version
|LED||Port||Location||Color / Type|
|RGB801-808||P8_0||6 on Antenna and 2 in the lower area of the PCB||RGB / WS2812B|
These are RGB LEDs with their own microcontroller, so all LEDs can be programmed individually. They are daisy chained, first the two in the lower area of the PCB and then six on the antenna on the top. So if you don't want to add all LEDs, or want to start with only one first, you have to follow the order “middle left, middle right, antenna from right to left” or bridge the data pins of the unused LED pads.
Important note Due to a fn0rd in the layout the transistors intended to control power of the LEDs can't be used as intended. The transistor pads have not been populated. There are several ways of getting the LEDs to work:
The last option has the disadvantage that the blue LED will be a bit dimmer but it is the easiest option and the LEDs are quite bright already.
There are spaces for capacitors which are recommended, but the LEDs usually work fine without.
Do not bridge all three pads of each transistor as this will create a short!
Example with only two LEDs at the antenna, then the bridges at the lower part of the board aren't needed but you need to add bridges for transporting the signal (ignore the yellow arrows): https://twitter.com/michaelossmann/status/629779084801781760
Sorry for that, but wouldn't it be boring otherwise?
If you have a close look at an LED, you'll notice one corner is marked by having a bit cut off. In the photo below, the pads where this corner needs to be are marked in red:
All LEDs are on the same data line, if they are not all soldered on, the data line is interrupted. You can either solder on all LEDs or bridge the data line. The image below shows where the data line goes, red lines are on the PCB, green lines are usually closed by LEDs. If you are not filling all LED spots, you have to fill the missing connections with wire.
Switch off your badge, press the joystick to the left (in the direction of DARC). Select TESTAPP, and then ws2812b.
How should the test pattern look like?
The 2 lower LEDs should be yellow, the one at the tip of the antenna should be green and the other 5 LEDs on the antenna blue.
Have a look at How to properly solder the LED's to see how to get a bit more brightness out of your LEDs.