HardLabs

Carbentra

hicancan·carbentra-smart-plug·electronics/carbentra.kicad_pcb

Carbentra PCB layout, top view — open source ESP32 board by hicancan

About the Carbentra PCB

Carbentra is an open source ESP32 PCB design by hicancan, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 72 × 68 mm, with 33 components from 25 distinct parts.

Its main chip is the ESP32-C3-WROOM-02U-N4, from the ESP32 family. Other key parts include the AP63203WU-7 and TMP102AIDRLR. By type, the board carries 11 resistors, 7 capacitors, 5 connectors, 3 ICs, 1 transistor and 1 relay.

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

From the project

CARBENTRA smart plug: AIoT edge device for campus energy orchestration

Editable KiCad 9 schematic and two-layer 72×68 mm PCB; upstream-symbol-derived pin geometry; 33 placed electrical components plus 4 mounting holes (37 footprints); real net assignments; fully connected isolated low-voltage routing (digital connectivity only); true KiCad ERC/DRC reports; BOM candidate sources; board/package STEP, FreeCAD and OBJ; regenerated PDF/SVG review drawings. This is a development source release with FABRICATION HOLD, not a finished appliance circuit or a safe prototype to energize.

Main components on the Carbentra

ESP32-C3-WROOM-02U-N4AP63203WU-7TMP102AIDRLR

Carbentra bill of materials (BOM)

33 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3-WROOM-02U-N4
U1
1
AP63203WU-7
U2
1
TMP102AIDRLR
U3
1
AO3400A
Q1
1
LINE IN - terminal HOLD
J1
1
SWITCHED OUT - HOLD
J2
1
ISOLATED METER PORT
J3
1
DEBUG - MAINS DISCONNECTED
J4
1
FUSED AUXILIARY INPUT
J5
1
RT314005 / 5V
K1
1
IRM-03-5
PS1
1
LOCAL BUTTON
SW1
1
STATUS LED GREEN
LED1
1
SS14
D1
1
3.9uH
L1
1
10uF 16V
C1
1
100nF 16V
C2
2
22uF 10V
C3, C4
2
100nF 10V
C5, C7
1
1uF 10V
C6
Show 5 more
QtyPartRefs
1
100R
R1
1
100k
R2
6
10k
R3, R4, R5, R6, R9, R10
2
4.7k
R7, R8
1
1k
R11

Carbentra design files

The KiCad project lives in the hicancan/carbentra-smart-plug repository on GitHub; these links point at the commit this page was built from.

Carbentra: common questions

What microcontroller does the Carbentra use?

The Carbentra is built around the ESP32-C3-WROOM-02U-N4, from the ESP32 family.

How big is the Carbentra PCB?

The Carbentra measures 72 × 68 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Carbentra?

33 components, from 25 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 Carbentra design files?

From the hicancan/carbentra-smart-plug 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 Carbentra design in my own project?

Yes, under the terms of its AGPL-3.0 license, which hicancan chose for the repository.

Can I test firmware for the Carbentra 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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