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2 layers23.5 × 20 mmMK4 Accelerometer, the printed circuit board in 3D

MK4 Accelerometer

MCDELTAT/MK4_Accelerometer36

Documentation and Designs for Accelerometers on the Prusa MK4 Printer

Open in PCBKitView on GitHub.kicad_pcb
Size
23.5 × 20 mm
Copper layers
2
Thickness
1.6 mm
Parts
8
Nets
12
Pads
30
Tracks, vias
66, 4
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
10 Mar 2024
Updated
25 May 2024

Overview

MK4 Accelerometer is an open-source printed circuit board by MCDELTAT, from the MCDELTAT/MK4_Accelerometer repository on GitHub. It is a 2-layer board of 23.5 × 20 mm with 8 parts on 12 nets, routed with 66 tracks and 4 vias.

Its parts include 2 capacitors, 1 resistor, 1 IC, 1 diode and 1 connector. It belongs with the sensors and measurement boards and the NXP (LPC, Kinetis, i.MX RT) boards of this library.

README

Accelerometer PCBs/v0.1/README.md

Prusa MK4 Accelerometer v0.1

🛑 This board was submitted for reference, but it won't work without a custom cable. This is because I got the pins backwards on the Click-mate connector because I had crimped my own. When trying with a stock cable from Digikey, I noticed the error. This will be fixed in the next revision. In other words: don't try to make this one.

This is the bare minimum reference circuit as provided by STMicroelectronics, with an LED for reference.

BOM:

Digikey Part NumQuantityDescription
1292-0201X104K250CT-ND10603 100nF Ceramic Capacitor
CL10A106MQ8NNNC10603 10uF Ceramic Capacitor
IN-S63AT5G10603 Green LED 525nm
RC0603FR-07120RL10603 120Ohm Resistor 1/10W
50258406701Molex Clickmate 6Pin SMT Connector
LIS2DHTR1LIS2DHTR MEMS Accelerometer

When aligning the LIS2DHTR by hand, make sure the circle is in the top right corner, matching the stars near the LGA-12 pads.

Parts

8
QtyValueFootprintReferences
2MountingHole_PadMountingHole:MountingHole_2.2mm_M2_PadH1, H2
1100nFCapacitor_SMD:C_0603_1608MetricC1
110KResistor_SMD:R_0603_1608MetricR1
110uFCapacitor_SMD:C_0603_1608MetricC2
15025840670Molex_5025840670:CON_5025840670_MOLJ1
1GREENLED_SMD:LED_0603_1608MetricD1
1LIS2DH12TRSTMicroelectronics:LGA-12_STMU1

Questions

How big is the MK4 Accelerometer PCB?

It measures 23.5 × 20 mm and has 2 copper layers, 1.6 mm thick.

What parts does the MK4 Accelerometer use?

8 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the MK4 Accelerometer KiCad files?

From the MCDELTAT/MK4_Accelerometer repository on GitHub, at the commit this page was made from: the board is Accelerometer PCBs/v0.1/MK4 Accelerometer.kicad_pcb and its schematic Accelerometer PCBs/v0.1/MK4 Accelerometer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the MK4 Accelerometer design in my own project?

Its repository states no licence, so its author keeps all rights: ask MCDELTAT before reusing the design.

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