HardLabs

Apex Motherboard

Apex-Ottawa-Team·hardware·Motherboard/Motherboard.kicad_pcb

Apex Motherboard PCB layout, top view — open source STM32 board by Apex-Ottawa-Team

About the Apex Motherboard PCB

Apex Motherboard is an open source STM32 PCB design by Apex-Ottawa-Team, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 49.8 × 39 mm, with 21 components from 13 distinct parts.

Its main chip is the STM32L431RCT6, from the STM32 family. Other key parts include the MIC23050-SYML-TR. By type, the board carries 12 capacitors, 3 resistors, 2 ICs, 2 connectors and 1 inductor.

It belongs with the sensors designs in this gallery.

From the project

All the PCBs and CAD files for our Apex weather balloon module

This repository contains the hardware design files for Ottawa Skybound's weather ballon for Apex. The repository contains of multiple PCB modules designed in KiCad. The system includes a motherboard, wireless communication module, and various sensor interfaces.

LoRa Module: Wireless communication module using LoRa technology. Designed by Adam Turaj

Motherboard: Main control board for the Apex system. Designed by Adam Turaj

Apex Motherboard, from the project README
From the project README

Main components on the Apex Motherboard

STM32L431RCT6MIC23050-SYML-TR

Apex Motherboard bill of materials (BOM)

21 components, 13 distinct parts.

QtyPartRefs
1
STM32L431RCT6
STM32L431RCTx
U1
1
MIC23050-SYML-TR
MIC23050-SYML
U2
1
MSD-1-A
Micro_SD_Card
J3
1
5-146274-4
Conn_SW
J4
1
PTS645SK43SMTR92 LFS
BOOT0
BOOT0
1
MCEE1005T1R0MHN
1uH
L2
7
CL05B104KP5NNNC
0.1uF
C1, C2, C3, C4, C11, C13, C14
1
GRM155R70J105KA12D
1uF
C12
1
CL05A106MQ5NUNC
10uF
C15
2
GRM155R60J475ME47D
4.7uF
C16, C18
1
GRM1555C1H561JA01D
560pF
C17
1
RC0402JR-0710KL
10k
R1
2
RC0402JR-07560RL
560R
R2, R3

Apex Motherboard design files

The KiCad project lives in the Apex-Ottawa-Team/hardware repository on GitHub; these links point at the commit this page was built from.

Apex Motherboard: common questions

What microcontroller does the Apex Motherboard use?

The Apex Motherboard is built around the STM32L431RCT6, from the STM32 family.

How big is the Apex Motherboard PCB?

The Apex Motherboard measures 49.8 × 39 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Apex Motherboard?

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

Where can I download the Apex Motherboard design files?

From the Apex-Ottawa-Team/hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Apex Motherboard design in my own project?

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

Can I test firmware for the Apex Motherboard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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