HardLabs

PIMU

pepassaco·pIMU·Kicad/4.0.kicad_pcb

PIMU PCB layout, top view — open source AVR/Arduino board by pepassaco

About the PIMU PCB

PIMU is an open source AVR/Arduino PCB design by pepassaco, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 18 × 12.3 mm, with 13 components from 10 distinct parts.

Its main chip is the ATmega328P-MU, from the AVR/Arduino family. Other key parts include the TLV61225 and MPU-9250. By type, the board carries 7 capacitors, 3 ICs, 1 inductor and 1 resistor.

From the project

Unidad de medición inercial portatil y de pequeño tamaño

pIMU es una unidad de medición inercial (acelerómetro, giroscopio y magnetómetro) capaz de enviar los datos muestreados de forma inalámbrica.

· Consumo: 9mA (consumo optimizado en el código)

El sensor principal encargado de la recolección de datos es un MPU9250. Éste es controlado por un microcontrolador Atmega328p que, a su vez, envía los datos en bruto a un módulo NRF24L01 para su transmisión. El regulador de tensión será un TLV61225, capaz de elevar tensiones de hasta 0,7V a los 3,3V necesarios para el funcionamiento del resto de integrados.

Main components on the PIMU

TLV61225ATmega328P-MUMPU-9250

PIMU bill of materials (BOM)

13 components, 10 distinct parts.

QtyPartRefs
1
TLV61225
IC1
1
ATmega328P-MU
U1
1
MPU-9250
U2
1
Módulo NRF24L01
NRF24L01
1
4.7uH
L1
3
0.1uF
C1, C5, C7
1
4.7uF
C2
2
10uF
C3, C4
1
10nF
C6
1
10K
R1

PIMU design files

The KiCad project lives in the pepassaco/pIMU repository on GitHub; these links point at the commit this page was built from.

PIMU: common questions

What microcontroller does the PIMU use?

The PIMU is built around the ATmega328P-MU, from the AVR/Arduino family.

How big is the PIMU PCB?

The PIMU measures 18 × 12.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PIMU?

13 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the PIMU design files?

From the pepassaco/pIMU repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the PIMU design in my own project?

Yes, under the terms of its GPL-3.0 license, which pepassaco chose for the repository.

Can I test firmware for the PIMU without the hardware?

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

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