HardLabs

Lighthouse Base

mwuerms·lighthouse_hardware·kicad/lighthouse_base/lighthouse_base.kicad_pcb

Lighthouse Base PCB layout, top view — open source STM32 board by mwuerms

About the Lighthouse Base PCB

Lighthouse Base is an open source STM32 PCB design by mwuerms, published on GitHub under the MIT license. It is a 4-layer board measuring 90 × 66.3 mm, with 45 components from 37 distinct parts.

Its main chip is the STM32L412RBTx, from the STM32 family. Other key parts include the R-78E5.0-1.0, TPS61176RTER, SHTC3-TR-10KS, MCP111T-xxxE_TT and RV-3028-C7. By type, the board carries 14 capacitors, 13 resistors, 6 ICs, 5 diodes, 2 connectors and 2 battery holders.

It belongs with the sensors designs in this gallery.

From the project

+ lighthouse + buoy: hand sender, ble advertising

+ lighthouse + buoy: hand sender, ble advertising

- RF-MCU: nRF52840: NINA-B302-00B Module (ublox) - SWDIO connector (50 mil header) - RTC (optional): i2c + backup battery CV - sound module: DFPlayer mini - display 1: display time - display 2: lighting, simulate sunrise - Buttons - Sensors - ambient light sensor (ALS) - VEML7700-TR - TMD37253M much more than ALS, also proximity and color sensor - also maybe VEML3235, VEML6035 - rh sensor - SHT40-AD1B-R2 - p sensor - DPS368XTSA1 - microphone, maybe implement a "do I snore" functionality - CMM-4030DT-26354-TR

Lighthouse Base, from the project README
From the project README

Main components on the Lighthouse Base

R-78E5.0-1.0TPS61176RTERSHTC3-TR-10KSMCP111T-xxxE_TTSTM32L412RBTxRV-3028-C7

Lighthouse Base bill of materials (BOM)

45 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
R-78E5.0-1.0
U1
1
TPS61176RTER
MCP73831-2-OT
U2
1
SHTC3-TR-10KS
TLV75533PDBV
U3
1
MCP111T-xxxE_TT
U4
1
STM32L412RBTx
U5
1
RV-3028-C7
U7
1
DMP3099L
Q1
1
9HT11-32.768KDZB-T
Y1
1
Barrel_Jack_Switch
J1
1
USB_C_Receptacle_USB2.0_14P
J2
1
Battery_Cell
BT1
1
Keystone 3002
BT2
1
~
SW1
2
KT-1206Y
B130-13-F
D1, D3
1
KT-1206Y
DF2S16FS
D2
1
KT-1206Y
PRTR5V0U2X
D4
1
KT-1206Y
PMEG4002EJ
D5
1
CL10B104KA8NNNC
10uF
C1
3
CL21B103KBANNNC
10uF
C2, C5, C7
1
0603B512K500NT
10uF
C3
Show 17 more
QtyPartRefs
1
CL21B105KAFNFNE
10uF
C4
1
CL10B104KA8NNNC
10nF
C6
3
CL10B104KA8NNNC
100nF
C8, C9, C10
1
CL21B105KAFNFNE
100nF
C11
1
100nF
C14
2
12.5pF
C15, C16
1
0603WAJ0135T5E
1M
R1
1
0603WAF5102T5E
10k
R2
1
0603WAF1004T5E
22R
R3
1
0603WAF6802T5E
22R
R4
1
0603WAF1004T5E
5k1
R5
1
5k1
R6
1
0603WAF1004T5E
1M
R11
1
0603WAF2002T5E
1M
R12
2
4k7
R13, R14
1
10k
R15
2
1k
R16, R17

Lighthouse Base design files

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

Lighthouse Base: common questions

What microcontroller does the Lighthouse Base use?

The Lighthouse Base is built around the STM32L412RBTx, from the STM32 family.

How big is the Lighthouse Base PCB?

The Lighthouse Base measures 90 × 66.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Lighthouse Base?

45 components, from 37 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 Lighthouse Base design files?

From the mwuerms/lighthouse_hardware 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 Lighthouse Base design in my own project?

Yes, under the terms of its MIT license, which mwuerms chose for the repository.

Can I test firmware for the Lighthouse Base 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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