HardLabs

LuxMeter

legend9ama·LuxMeterPCB·LuxMeter/LuxMeter.kicad_pcb

LuxMeter PCB layout, top view — open source STM32 board by legend9ama

About the LuxMeter PCB

LuxMeter is an open source STM32 PCB design by legend9ama, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 40 × 50 mm, with 36 components from 23 distinct parts.

Its main chip is the C89040, from the STM32 family. Other key parts include the C78960, C632000 and C150772. By type, the board carries 13 resistors, 8 capacitors, 5 connectors, 4 ICs, 3 diodes and 2 switches.

It belongs with the displays & leds, power & battery and sensors designs in this gallery.

From the project

LuxMeter started as a PCB design assignment for my Fundamentals of Electronics course.

LuxMeter started as a PCB design assignment for my Fundamentals of Electronics course.

The requirement was just to submit the layout files, but I decided to go all the way. I ordered the PCBAs and wrote the firmware.

This repository contains the hardware design files (KiCad), schematics, and manufacturing data.

The full schematic design is available in the LuxMeter/ folder.

LuxMeter, from the project README
From the project README

Main components on the LuxMeter

C78960C632000C150772C89040

LuxMeter bill of materials (BOM)

36 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C78960
BH1750FVI-TR
U1
1
C632000
MCP1700T-3302E_MB
U2
1
C150772
MCP73831-2ACI_MC
U3
1
C89040
STM32F030F4P6
U4
1
C8545
2N7002
Q1
1
C456012
USB_C_Receptacle_PowerOnly_6P
J1
1
C585350
104031-0811
J2
1
SWD
J3
1
OLED
J4
1
Battery
J5
2
C318884
TS-1187A-B-A-B
S1, S2
2
C2297
LED
D1, D2
1
C2286
LED
D3
3
C19666
4.7μF
C1, C2, C4
1
C15849
1μF
C3
4
C14663
0.1μF
C5, C6, C7, C8
1
C21190
1kOhm
R1
2
C23186
5.1kOhm
R2, R3
3
C25804
10kOhm
R4, R6, R11
1
C23212
6.8kOhm
R5
Show 3 more
QtyPartRefs
2
C23138
330 Ohm
R7, R8
2
C25803
100kOhm
R9, R10
2
C23162
4.7kOhm
R12, R13

LuxMeter design files

The KiCad project lives in the legend9ama/LuxMeterPCB repository on GitHub; these links point at the commit this page was built from.

LuxMeter: common questions

What microcontroller does the LuxMeter use?

The LuxMeter is built around the C89040, from the STM32 family.

How big is the LuxMeter PCB?

The LuxMeter measures 40 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LuxMeter?

36 components, from 23 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 LuxMeter design files?

From the legend9ama/LuxMeterPCB 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 LuxMeter design in my own project?

Yes, under the terms of its GPL-3.0 license, which legend9ama chose for the repository.

Can I test firmware for the LuxMeter 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.

Similar boards