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2 layers17.5 × 19.6 mmGo2 pressure sensor, the printed circuit board in 3D

An add-on pressure sensor module for the unitree GO2 for foot contact detection

Size
17.5 × 19.6 mm
Copper layers
2
Thickness
1.09 mm
Parts
11
Nets
8
Pads
32
Tracks, vias
44, 22
Pours
1
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
30 Oct 2024
Updated
1 Feb 2026

Overview

Go2 pressure sensor is an open-source printed circuit board by VincidaB, from the VincidaB/go2_pressure_sensor repository on GitHub. It is a 2-layer board of 17.5 × 19.6 mm with 11 parts on 8 nets, routed with 44 tracks and 22 vias.

It is built around the LP2980-ADJDBV. Its parts include 4 capacitors, 3 resistors, 2 ICs, 1 diode and 1 connector. It belongs with the sensors and measurement boards of this library.

Main components

1

README

README.md

The pressure sensor used is the GZP6859A040KPP33Z, as a replacement for the original XGZP6869A040 (Both have a pressure range between 0-40KPa).

The tube on the GO2 EDU is 1mm ID and 3mm OD silicone tubing, but I could make it fit on the pressure sensors, so I used 1.5mm ID instead. A small piece of tape or heat shrink can be used ont the foot side to make it fit better.

The screws needed are M2 length 4mm countersunk screws, the original being Philips head. 7 screws are needed per leg, for a total of 28 screws. They fix the tubing using two small plastic brackets than can be 3D printed, the files are in the 3d_models folder (4 of each must be printed).

By removing a plastic cover on the inner part of the leg, a connector is revealed, which connects to the sensor once it has been fastened : Connector

One of the 3D printed brackets, fastened, holding the tube in place: Connector

Here is the final PCBs manufactured and assembled: Front view of the panel Back view of the panel

Parts

11
QtyValueFootprintReferences
1100nCapacitor_SMD:C_0603_1608MetricC2
110pFResistor_SMD:R_0603_1608MetricC3
11uFResistor_SMD:R_0603_1608MetricC4
14.7uFResistor_SMD:R_0603_1608MetricC1
151.1kResistor_SMD:R_0603_1608MetricR3
15kResistor_SMD:R_0603_1608MetricR1
186.6kResistor_SMD:R_0603_1608MetricR2
1Conn_01x03_SocketConnector_JST:JST_GH_BM03B-GHS-TBT_1x03-1MP_P1.25mm_VerticalJ1
1D_ZenerDiode_SMD:D_SOD-123D1
1LP2980-ADJPackage_TO_SOT_SMD:SOT-23-5U2
1XPGZP6859AEnsmasteel_librairy:XGZ6859 6pinU1

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Questions

How big is the Go2 pressure sensor PCB?

It measures 17.5 × 19.6 mm and has 2 copper layers, 1.09 mm thick.

What parts does the Go2 pressure sensor use?

11 parts, built around the LP2980-ADJDBV. 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 Go2 pressure sensor KiCad files?

From the VincidaB/go2_pressure_sensor repository on GitHub, at the commit this page was made from: the board is go2_pressure_sensor.kicad_pcb and its schematic go2_pressure_sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Go2 pressure sensor design in my own project?

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