HardLabs

LED Badge

mjbella·LED_Badge

LED Badge PCB layout, top view — open source STM32 board by mjbella

About the LED Badge PCB

LED Badge is an open source STM32 PCB design by mjbella, published on GitHub. It is a 4-layer board measuring 165.1 × 76.2 mm, with 400 components from 27 distinct parts.

Its main chip is the STM32F407VGTx, from the STM32 family. Other key parts include the 74AHCT1G125, S-8252_(SOT23), MPU-6000, L7805 and MTCH105. By type, the board carries 200 diodes, 107 resistors, 68 capacitors, 11 connectors, 8 ICs and 2 transistors.

It belongs with the wearables and displays & leds designs in this gallery.

From the project

RGB LED Badge Prototype

This is a pcb badge with an MCU and tightly packed RGB LEDs (APA102).

Main components on the LED Badge

74AHCT1G125S-8252_(SOT23)MPU-6000L7805MTCH105STM32F407VGTxAZ1117-3.3

LED Badge bill of materials (BOM)

400 components, 27 distinct parts.

QtyPartRefs
2
74AHCT1G125
U1, U2
1
S-8252_(SOT23)
U3
1
MPU-6000
U4
1
L7805
U5
1
MTCH105
U6
1
STM32F407VGTx
U7
1
AZ1117-3.3
U8
2
Q_NMOS_GDS
Q1, Q2
1
Crystal
Y1
2
Conn_01x06
J21, J24
1
USB_OTG
J22
2
Conn_01x02
J23, J25
1
GS3
J28
5
TEST_1P
J29, J30, J31, J32, J33
1
POT
RV1
1
SW_Push
SW1
200
APA102
D1, D2, D3, D4, D5, D6, D7, D8 +192
1
Ferrite_Bead
L1
34
C
C1, C2, C3, C4, C5, C6, C7, C8 +26
28
C
C35, C36, C38, C39, C41, C42, C43, C44 +20
Show 7 more
QtyPartRefs
2
6.8p
C55, C57
2
CP
C58, C61
2
CP
C64, C67
7
R_Small
R1, R2, R6, R7, R8, R9, R15
1
10k
R3
96
R
R4, R5, R10, R11, R12, R13, R14, R16 +88
3
0
R28, R33, R59

LED Badge design files

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

LED Badge: common questions

What microcontroller does the LED Badge use?

The LED Badge is built around the STM32F407VGTx, from the STM32 family.

How big is the LED Badge PCB?

The LED Badge measures 165.1 × 76.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the LED Badge?

400 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the LED Badge design files?

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

Can I use the LED Badge design in my own project?

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

Can I test firmware for the LED Badge 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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