IMU-Stick

Merlin2LmmL·IMU-Stick·hardware/PCB/IMU.kicad_pcb

About the IMU-Stick PCB

IMU-Stick is an open source RP2040/RP2350 PCB design by Merlin2LmmL, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 32.5 × 16.5 mm, with 27 components from 13 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the ICM-42688P-HXY, W25Q128JVS and NCP1117-3.3_SOT223. By type, the board carries 17 capacitors, 4 ICs, 4 resistors, 1 connector and 1 switch.

It belongs with the sensors and robotics & motion designs in this gallery.

From the project

A USB Stick shaped IMU sensor that transmits motion data to the device plugged into

Also Note, that I purposely added a clutch powered way to open and close the Case. I plan on maybe gluing the top and bottom part of the case together, if they end up not having enough clutching power, because there is no real need in opening the case.

Another way would be to use a simple python script to read out the data like so:

And using that same principle you can also publish the data onto a ROS2 topich, which is the way that I'm going to use it.

IMU-Stick, from the project README — From the project README

Main components on the IMU-Stick

RP2040 ICM-42688P-HXY W25Q128JVS NCP1117-3.3_SOT223

IMU-Stick bill of materials (BOM)

27 components, 13 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	ICM-42688P-HXY HXY MOSFET(华轩阳电子)	LGA-14_L3.0-W2.5-P0.50-TL	U2
1	W25Q128JVS	SOIC-8_5.3x5.3mm_P1.27mm	U4
1	NCP1117-3.3_SOT223	SOT-223-3_TabPin2	U5
1	USB_A	USB_A_CNCTech_1001-011-01101_Horizontal	J1
1	SW_Push	SW_Push_SPST_NO_Alps_SKRK	SW1
2	100NF 100nF	C_0402_1005Metric	C2, C3
2	10UF 10uF	C_0805_2012Metric	C9, C10
11	0.1UF 0.1uF	C_0402_1005Metric	C11, C13, C14, C15, C16, C17, C18, C19 +3
2	10UF 10uF	C_0603_1608Metric	C12, C23
2	27R	R_0402_1005Metric	R9, R19
1	1k	R_0402_1005Metric	R12
1	10K 10k	R_0402_1005Metric	R13

IMU-Stick design files

The KiCad project lives in the Merlin2LmmL/IMU-Stick repository on GitHub; these links point at the commit this page was built from.

IMU-Stick: common questions

What microcontroller does the IMU-Stick use?

The IMU-Stick is built around the RP2040, from the RP2040/RP2350 family.

How big is the IMU-Stick PCB?

The IMU-Stick measures 32.5 × 16.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the IMU-Stick?

27 components, from 13 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the IMU-Stick design files?

From the Merlin2LmmL/IMU-Stick repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the IMU-Stick design in my own project?

Yes, under the terms of its Apache-2.0 license, which Merlin2LmmL chose for the repository.

Can I test firmware for the IMU-Stick without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.