HardLabs

POE

reportingsjr·rfidBoard·hardware/POE/POE.kicad_pcb

POE PCB layout, top view — open source STM32 board by reportingsjr

About the POE PCB

POE is an open source STM32 PCB design by reportingsjr, published on GitHub under the CERN-OHL-1.2 license. It is a 4-layer board measuring 100 × 50 mm, with 123 components from 85 distinct parts.

Its main chip is the STM32F100RC, from the STM32 family. Other key parts include the LTC4267-3, ENC28J60, PS2811, MCP16301 and TPS61175. By type, the board carries 39 capacitors, 37 resistors, 17 diodes, 11 connectors, 6 ICs and 4 transistors.

It belongs with the rf & radio designs in this gallery.

From the project

RFID/NFC board with ethernet+PoE with numerous I/Os.

General ========= This repository has the source for a PCB that uses Power over Ethernet (PoE) to power an STM32F103 microcontroller. It has a 10mbit ethernet MAC/PHY and 3.3V (.6A, 2W) and 12V (.5A, 6W) supplies fed from a 5V (1.8A, 9W) power rail. This gives this board the capability to provide power and control for quite a few different peripherals. The first use of the circuit boards and software in this repository is to provide a lower cost and more versatile RFID based entry method for a local hackerspace, Hive13.

Main components on the POE

LTC4267-3ENC28J60PS2811MCP16301TPS61175STM32F100RC

POE bill of materials (BOM)

123 components, 85 distinct parts.

QtyPartRefs
1
LTC4267-3
U1
1
ENC28J60
U2
1
PS2811
U3
1
MCP16301
U4
1
TPS61175
U5
1
STM32F100RC
U6
1
SI3440DV, NFET
Q1
1
MMBTA42
Q2
1
2N7002
Q3
1
MOSFET_N
Q4
1
0813-1X1T-57-F
J1
1
SWD
J2
1
MCU Port B
J3
1
MCU Port C
J4
1
PoE-
P1
1
PoE+
P2
1
GND
P3
1
+5V
P4
1
+12V
P5
1
+3V3
P6
Show 65 more
QtyPartRefs
1
12V_Switch
P7
1
P***
1PIN
1
25MHz OSC
G1
1
24MHz OSC
G2
1
reset
SW1
1
PA1134
T1
1
SMB540
D1
1
SMAJ58A
D2
3
BAS516
D3, D4, D7
1
1N5237B, 8.2V
D5
2
CDNBS04-B08200
D6, D9
1
TLV431
D8
2
LED
D10, D11
1
5V LED
D12
1
1N5189
D13
1
1N4148
D14
1
MBRA340T3G
D15
1
12V LED
D16
1
3V3 LED
D17
1
3.3uH
L1
1
choke
L2
1
10uH
L3
1
15uH
L4
1
0.1uF, 100V, X7R
C1
1
1uF, 100V
C2
1
68pF, 200V
C3
1
4.7uF, 10V
C4
1
4.7uF, 100v
C5
1
470pF
C6
1
27nF
C7
1
2.8nF, 250VAC, YCAP
C8
1
220uF, 6.3v
C9
2
10nF
C10, C11
3
1uF
C12, C31, C37
1
33nF
C13
2
100uF, 6.3V, X5R
C14, C15
2
10uF
C16, C18
4
10uF
C17, C22, C24, C25
13
100nF
C19, C26, C27, C28, C29, C30, C32, C33 +5
1
47nF
C20
1
180nF
C21
1
22uF
C23
4
10k
R1, R26, R29, R36
2
220K
R2, R3
2
0.250R
R4, R400
2
4.7K
R5, R34
1
510R
R6
1
100R, 1/8W
R7
1
100k
R8
1
6.8k
R9
1
10R
R10
3
1k
R11, R17, R20
1
47k
R12
1
100k, 1%
R13
1
33.2k
R14
4
49R9
R15, R16, R18, R19
2
470R
R21, R35
2
2.8k
R22, R30
1
226k
R23
1
1.4k
R24
1
31.2k
R25
1
143k
R27
1
16.2k
R28
1
2.32k
R31
2
24.9
R32, R33

POE design files

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

POE: common questions

What microcontroller does the POE use?

The POE is built around the STM32F100RC, from the STM32 family.

How big is the POE PCB?

The POE measures 100 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the POE?

123 components, from 85 distinct parts. The full bill of materials is listed on this page.

Where can I download the POE design files?

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

Can I use the POE design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which reportingsjr chose for the repository.

Can I test firmware for the POE 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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