EMU LED Button PCB

Details

This PCB goes behind the eject button on each EMU lane. Four RGBW LEDs light the button up, so Happy Hare can show load and unload animations, and an SMD switch gives a crisper click than the D2F switch with magnets. It also cuts down the wiring and soldering in the button.

What it replaces

• 1 NeoPixel, 1 D2F-L switch and 4 of the 6×3 mm magnets from the base EMU BOM, per lane
• The JST-XH 5-pin header is already soldered on

Good to know

• One PCB per lane.
• In Klipper, set chain_count: 5 per lane: LEDs 1–4 are the button (exit LEDs), LED 5 is the dry box (entry LED).
• The eject button pin gets a ! (^!mmu0:EJECT_BUTTON), unlike the D2F setup.
• Run a 600 mm AWG26–28 wire from DOut to the LED IN of the dry box, then you can leave out the third WAGO.

In stock in the Netherlands, ships in 1–2 working days with no import fees.

For the EMU by DW-Tas and igiannakas. Sourced from the EMU project's licensed PCB maker. Assembly: EMU LED Button PCB manual