HardLabs

Plc board

denorath-sys·gridnet·hardware/pcb/plc-board/plc-board.kicad_pcb

Plc board layout, top view — open source ESP32 board by denorath-sys

About the Plc board

Plc board is an open source ESP32 PCB design by denorath-sys, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 100 × 80 mm, with 62 components from 43 distinct parts.

Its main chip is the ESP32-C3-MINI-1, from the ESP32 family. Other key parts include the HLK-5M05, AMS1117-3.3, ST7580 and MT3608. By type, the board carries 20 resistors, 17 capacitors, 8 diodes, 5 ICs, 5 inductors and 4 connectors.

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

From the project

Open hardware powerline mesh communication terminal

GRIDNET — PLC/Power Board KiCad Schematic + PCB REV 0.6 (Board 1, the PLC Adapter's own PCB — see "Board 1 is the PLC Adapter's PCB" below.)

What changed in REV 0.6 ------------------------

The stackup is a rule now, not a sentence. STACKUP in buildpcb.py` is written into the board's design settings: 1.6mm FR-4, four layers, 1oz outer copper (0.5oz inner, which does not matter here — the inner layers carry only planes and every current-carrying trace, the 1.0mm mains nets included, is on an outer layer), 0.2mm minimum track and clearance, 0.6mm vias on 0.3mm drills, 0.15mm annular ring…

Main components on the Plc board

HLK-5M05ESP32-C3-MINI-1AMS1117-3.3ST7580MT3608

Plc board bill of materials (BOM)

62 components, 43 distinct parts.

QtyPartRefs
1
HLK-5M05
U1
1
ESP32-C3-MINI-1
U2
1
AMS1117-3.3
U3
1
ST7580
U4
1
MT3608
U5
1
8MHz
Y1
1
MAINS_L_N
J1
1
ESP32_UART0_PROGRAMMING
J2
1
ST7580_JTAG_DEBUG
J3
1
TERMINAL_5V_IN
J4
1
S20K275
RV1
1
750510231
T1
1
P6KE250CA
D1
1
LED (green)
D2
1
LED (amber)
D3
1
LED (blue)
D4
4
SS34
D5, D6, D7, D8
2
FB
FB1, FB2
1
22uH
L1
1
150uH
L2
Show 23 more
QtyPartRefs
1
12uH
L3
1
220uF
C1
5
100nF
C2, C3, C4, C5, C11
1
1uF
C6
1
1F 5.5V
C7
2
22uF
C8, C9
1
100uF
C10
1
1nF C0G
C12
2
68pF C0G
C13, C14
1
12nF
C15
1
10uF/50V X5R
C16
1
150nF X1
C17
2
1k
R1, R2
1
330R
R3
6
10k
R4, R5, R6, R7, R8, R19
3
5.1k
R9, R10, R16
1
10R
R11
1
19.1k
R12
2
1k
R13, R15
1
270R
R14
1
22k
R17
1
33k
R18
1
150R
R20

Plc board design files

The KiCad project lives in the denorath-sys/gridnet repository on GitHub; these links point at the commit this page was built from.

Plc board: common questions

What microcontroller does the Plc board use?

The Plc board is built around the ESP32-C3-MINI-1, from the ESP32 family.

How big is the Plc board?

The Plc board measures 100 × 80 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Plc board?

62 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the Plc board design files?

From the denorath-sys/gridnet repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Plc board design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which denorath-sys chose for the repository.

Can I test firmware for the Plc board 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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