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Poe led bar

lucysrausch·poe-led-bar

Poe led bar PCB layout, top view — open source ESP32 board by lucysrausch

About the Poe led bar PCB

Poe led bar is an open source ESP32 PCB design by lucysrausch, published on GitHub. It is a 4-layer board measuring 34 × 112 mm, with 77 components from 30 distinct parts.

Its main chip is the C380921, from the ESP32 family. Other key parts include the ESP32-WROOM, LAN8720A, SY8120B, 4104 and C8689. By type, the board carries 38 resistors, 23 capacitors, 5 ICs, 3 transistors, 3 connectors and 2 inductors.

It belongs with the iot & wireless designs in this gallery.

From the project

Hardware design files for PoE+ (802.3at Type 2) powered adressable LED bars based on ESP32 and WLED

Important! I did not have a chance to write docs for this project yet, so: The hardware is proven at this point and people have successfully ordered and used PCBs based off this repo, with one exception.

The PCB design has a minor bug with the polarity of one of the LEDs inside the ethernet jack. In rev1.0 of the PCB design, this is not only causing the LED to not work but also the entire ethernet link, because the LEDs are also used as strapping pins to configure the PHY.

Main components on the Poe led bar

ESP32-WROOMLAN8720ASY8120B4104C8689

Poe led bar bill of materials (BOM)

77 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-WROOM
U1
1
LAN8720A
U2
1
SY8120B
U3
1
4104
U5
1
C8689
CH340T(SSOP20W)
U6
2
C380921
BC817-40(SOT23)
Q1, Q3
1
Q12MHZ/20PF/10PPM/4P/3.2X2.5MM
Q12MHz/20pF/10ppm/4P/3.2x2.5mm
Q2
1
RJ45_LED_SHIELDED
RJ45_LED_Shielded
J1
2
LED
J2, J3
1
RT7402
PS1
1
TG111-MSC13LF
TR1
1
MISB-SWMM-5B-LF(USB_MICRO)
USB-UART1
1
C1002
FB
FB1
1
4U7
4u7
L2
7
100N
100n
C1, C3, C5, C15, C20, C21, C25
2
1u
C2, C4
4
C15725
100n 100V
C6, C7, C8, C9
4
10U
10u
C10, C14, C17, C18
2
C9196
1nF 2kV
C11, C12
2
4U7
4u7
C16, C19
Show 10 more
QtyPartRefs
2
27P
27p
C26, C27
5
3K3
3k3
R1, R2, R3, R4, R17
12
22
R5, R12, R13, R14, R15, R16, R18, R27 +4
4
49R9
R6, R7, R8, R9
6
10K
10k
R10, R25, R26, R28, R39, R40
4
1k
R11, R19, R41, R42
1
12K1
12k1
R20
4
75R
R21, R22, R23, R24
1
100K
100k
R29
1
22K1
22k1
R32

Poe led bar design files

The KiCad project lives in the lucysrausch/poe-led-bar repository on GitHub; these links point at the commit this page was built from.

Poe led bar: common questions

What microcontroller does the Poe led bar use?

The Poe led bar is built around the C380921, from the ESP32 family.

How big is the Poe led bar PCB?

The Poe led bar measures 34 × 112 mm, has 4 copper layers and is 4.69 mm thick.

How many components are on the Poe led bar?

77 components, from 30 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 Poe led bar design files?

From the lucysrausch/poe-led-bar 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 Poe led bar design in my own project?

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

Can I test firmware for the Poe led bar without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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