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M2K PCB with cable

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The M2K PCB combines a very low weight (9.0 grams with lens and wheel; the main PCB with lens is just 5.8 grams), high performance (8,000 hertz capable MCU; zero debouncing lag for all switches) and an open-source firmware (which is pre-installed on the PCB).
Included in the price: the M2K cable, also known as the best non-Paracord gaming mouse cable (very flexible and yet very robust).
In short: the only thing that is missing when you order the M2K PCB with cable is a mouse shell.
PCB specs:
  • PCB itself: 1.0 mm FR4 with 4 layers and ENIG finish
  • Modularity: Wheel encoder and middle mouse button switch sit on a separate PCB that can be connected to the main PCB with a so-called Board-to-Board connector (Molex SlimStack)
  • Switches: D2F-01F
  • Encoder: Alps EC10E1220501
  • MCU: STM32F7 series (216 MHz Cortex-M7 core)
  • Firmware: open-source (more information about the M2K firmware here; GitHub link to the M2K firmware here)
  • Sensor: PixArt 3360
  • Encoder: Alps EC10E1220501
  • Two SMT spacers for T4 Torx screws (those two screws are included)
  • Cable receptacle: Molex Pico-Lock (pairs with Molex 5040510401 which in turn pairs with Molex 5040520298). Color code for the cable: the black conductor (ground) should be inserted into the Molex receptacle so that it is the one closest to the sensor, followed by yellow (D+), white (D-) and red (5V).
  • Wheel: Ceramic coated PC
  • Lens is included
  • Picture of broken out MCU pins (for modding purposes)
  • Picture of broken out pins for the wheel and middle mouse button (for modding purposes)
  • M2K PCB 3D file
  • PixArt in the 3360 datasheet recommends a «Distance from Lens Reference Plane to Tracking Surface» of at least 2.2 mm, 2.6 mm at most with the typical value being 2.4 mm. See this drawing.

Cable specs:

  • Producer of the raw cable: Tensility (link to the datasheet)
  • Diameter: 2.5 mm
  • Weight per meter: 8.8 grams
  • Cable has a USB A plug on the one end and is crimped on the other end (crimps used: Molex 5040520298; no worries: the plug, Molex 5040510401, is also included)
M2K PCB with cable