Mount Adafruit NeoPixel Sticks on the V0 Y-rail Extrusions

• Add controllable RGB(W) LEDs to your V0
• No heatset inserts required
• Compatible with NeoPixel Sticks from Adafruit
• Large cavity inside the body makes wire management easier
• Light guides prevent LEDs from blinding you
• Designed with Timmit99's V0 Umbilical in mind (not required)

Inspired by the mod from JNP

BOM

• Printed parts
• (2) Adafruit NeoPixel Stick
• (8) M2×6 flat head - to mount covers
• (4) M2×8 SHCS/BHCS - to mount the PCBs
• (4) M3×6 SHCS/BHCS - to mount the assemblies to the Y-rail extrusions
• (4) M3 nuts - to mount the assemblies to the Y-rail extrusions
• (2) JST-XH connector plug, 4-position - to allow for easy disconnection (optional)
• 22awg wire

Assembly

• Solder wires of appropriate length onto the back of each PCB (VDC, GND, DIN, and DOUT)
• If using JST-XH as disconnects, solder the other ends of the wires to 4-position (male) connectors - the connector should fit inside the body cavity once assembled
• Mount the PCBs inside the printed bodies using M2×8s
• Don't install the printed covers at this stage

Installation

• Insert 2× M3 nuts on the bottom side of each Y-rail extrusion - requires partial frame disassembly if already assembled
• For the wire path, you have two choices:
  • Drill 1/4" holes in the midpanel where the printed bodies comes into contact with the midpanel and route the wires through that
  • Route the wires through the opening on the "top" of the printed body, through the slot of the extrusion, and over the midpanel
• Install the printed and assembled body to the Y-rail extrusions using 2× M3×6s and the previously inserted M3 nuts
• Route wires and fold excess wire inside the body cavity (see wiring below)
• Install the printed covers using 4× M2×6 flatheads (SHCS/BHCS might also work - check clearance with the gantry )

Wiring

• If using Timmit99's V0 Umbilical frame PCB, connect the pixel strips to Strip1 and Strip 2.
  • Pay attention to pin ordering!
• If connecting directly to a compatible controller, you have to chain the data signal between the left and right assemblies
  • Choose either the left or right assembly to be the first in the chain
  • The Controller's neopixel data output pin will connect to the DIN of that "first" assembly
  • The DOUT of the "first" assembly must connect to the DIN of the "second" assembly
  • VDC and GND of both assemblies must be connected to the Controller's neopixel VDC and GND pins
• Some Controller boards (e.g. SKR) require a capacitor and resistor - SKR Neopixel Breakout Board link1 link2

Klipper Config

• Create a "neopixel" section in printer.cfg and give it a name
• Refer to your Controller documentation to find the pin name that controls the neopixel data signal
• Example:

  [neopixel lights]
  pin: PA8
  chain_count: 16
  color_order: GRB
  

• Refer to Klipper for more information