HardLabs

Grow light

GeoffreyKassis·led_grow_light·MAIN_BOARD/grow-light.kicad_pcb

Grow light PCB layout, top view — open source STM32 board by GeoffreyKassis

About the Grow light PCB

Grow light is an open source STM32 PCB design by GeoffreyKassis, published on GitHub. It is a 4-layer board measuring 50 × 50 mm, with 69 components from 32 distinct parts.

Its main chip is the STM8S003F3P6TR, from the STM32 family. Other key parts include the HUSB238_XXXDD, USBLC6-2SC6, TPS61165DRV and HT7533. By type, the board carries 18 capacitors, 18 resistors, 8 ICs, 8 diodes, 4 connectors and 4 inductors.

From the project

USB-C PD grow light in two assemblies: an FR-4 controller (MAINBOARD/) and a one-layer aluminum LED panel (LEDBOARD/), joined by an 8-wire 2×4 IDC harness. Schematic connectivity and the as-drawn BOM come from KiCad (MAINBOARD/production/, LEDBOARD/production/). This file records

USB-C PD grow light in two assemblies: an FR-4 controller (MAINBOARD/) and a one-layer aluminum LED panel (LEDBOARD/), joined by an 8-wire 2×4 IDC harness. Schematic connectivity and the as-drawn BOM come from KiCad (MAINBOARD/production/, LEDBOARD/production/). This file records why parts and numbers are what they are.

USB-C is the only power inlet. An HUSB238 PD sink negotiates the contract over I2C. An STM8S003F3 requests 9 V or 12 V (never 20 V) and PWM-dims four TPS61165 boost channels from PC6. Each channel drives one isolated LED string: four 4000 K whites plus one 660 nm red in…

Main components on the Grow light

HUSB238_XXXDDSTM8S003F3P6TRUSBLC6-2SC6TPS61165DRVHT7533

Grow light bill of materials (BOM)

69 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
HUSB238_XXXDD
HUSB238_xxxDD
U1
1
STM8S003F3P6TR
STMicroelectronics
U2
1
USBLC6-2SC6
U3
4
TPS61165DRV
U4, U5, U11, U12
1
HT7533
Holtek Semicon
U7
1
AO3401A
Alpha & Omega Semicon
Q1
1
CONN_02X04_ODD_EVEN
Conn_02x04_Odd_Even
J1
1
C2927039
Connector, USB-TYPE-C-16P
J2
1
PROG
J3
1
UART
J4
1
3A/24V
F1
2
C318884
Tactile Button, 160gf
XKB Connectivity
S1, S2
5
TestPoint
TP_3v3, TP_GND1, TP_PWM1, TP_VBUS1, TP_Vin1
1
C84256
Red
Foshan NationStar Optoelectronics
D5
1
C2297
Green
Hubei KENTO Elec
D6
4
B16WS
hongjiacheng
D7, D10, D11, D12
1
BZX84C10
hongjiacheng
D8
1
SMAJ15A
hongjiacheng
D9
4
22U
22u
L1, L2, L3, L4
6
1UF
1uF
Samsung Electro-Mechanics
C1, C8, C9, C10, C11, C16
Show 12 more
QtyPartRefs
4
4.7UF
4.7uF
Samsung Electro-Mechanics
C2, C3, C4, C5
2
10UF
10uF
Samsung Electro-Mechanics
C6, C7
2
100NF
100nF
YAGEO
C17, C18
4
220NF
220nF
Samsung Electro-Mechanics
C19, C20, C21, C22
1
10Ω
UNI-ROYAL(Uniroyal Elec)
R1
1
5.1kΩ
UNI-ROYAL(Uniroyal Elec)
R3
4
820M
820m
R4, R5, R6, R7
1
470Ω
UNI-ROYAL(Uniroyal Elec)
R8
2
4.7kΩ
UNI-ROYAL(Uniroyal Elec)
R9, R10
1
49.9kΩ
UNI-ROYAL(Uniroyal Elec)
R11
2
1kΩ
UNI-ROYAL(Uniroyal Elec)
R16, R17
6
10kΩ
UNI-ROYAL(Uniroyal Elec)
R18, R19, R20, R21, R22, R23

Grow light design files

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

Grow light: common questions

What microcontroller does the Grow light use?

The Grow light is built around the STM8S003F3P6TR, from the STM32 family.

How big is the Grow light PCB?

The Grow light measures 50 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Grow light?

69 components, from 32 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 Grow light design files?

From the GeoffreyKassis/led_grow_light 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 Grow light design in my own project?

The repository has no license, so all rights stay with GeoffreyKassis. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Grow light 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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