BRD3
About the BRD3 PCB
BRD3 is an open source ESP32 PCB design by mFulmini, published on GitHub. It is a 2-layer board measuring 90 × 70 mm, with 18 components from 17 distinct parts.
Its main chip is the SEEED ESP32-C3, from the ESP32 family. Other key parts include the DHT22. By type, the board carries 4 connectors, 3 resistors, 2 diodes, 2 capacitors, 1 IC and 1 transistor.
From the project
Tutaj znajduje się część pracy inżynierskiej w postaci oprogramowań jednostek brzegowych, rysunków, schematów elektrycznych oraz poglądowych zrzutów ekranu. This section presents a part of the engineering thesis, comprising edge unit software, technical drawings, electrical schematics, and illustrative screenshots.
Main components on the BRD3
BRD3 bill of materials (BOM)
18 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DHT22 | PinSocket_1x04_P2.54mm_Vertical | U1 |
| 1 | BC547 | TO-92_Inline | Q3 |
| 1 | SEEED ESP32-C3 | PinSocket_1x07_P2.54mm_Vertical | J1 |
| 1 | Conn_01x07_MountingPin | PinSocket_1x07_P2.54mm_Vertical | J4 |
| 2 | ARK-500 | TerminalBlock_MaiXu_MX126-5.0-02P_1x02_P5.00mm | J6, J10 |
| 1 | 47uF | CP_Radial_D5.0mm_P2.00mm | C_Polarised1 |
| 1 | Fuse | Fuseholder_Cylinder-5x20mm_Schurter_FAB_0031-355x_Horizontal_Closed | F1 |
| 1 | HLS8L-DC5V-S-C RELAY-HLS8L-DC5V-S-C_5P-19X15MM_ | REY5-19.0X15.0X15.0MM | K1 |
| 1 | HLK-PM01 | Converter_ACDC_Hi-Link_HLK-PMxx | PS1 |
| 1 | Varistor | RV_Disc_D9mm_W3.6mm_P5mm | RV1 |
| 1 | LED | LED_D5.0mm | D1 |
| 1 | 1N4007 | D_DO-41_SOD81_P10.16mm_Horizontal | D2 |
| 1 | 100 uF | CP_Radial_D5.0mm_P2.00mm | C1 |
| 1 | 100nF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C3 |
| 1 | 200 | R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R1 |
| 1 | 4,7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R2 |
| 1 | 1k | R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R3 |
BRD3 design files
The KiCad project lives in the mFulmini/engineer repository on GitHub; these links point at the commit this page was built from.
- LayoutModul3/BRD3.kicad_pcb
BRD3: common questions
What microcontroller does the BRD3 use?
The BRD3 is built around the SEEED ESP32-C3, from the ESP32 family.
How big is the BRD3 PCB?
The BRD3 measures 90 × 70 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the BRD3?
18 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the BRD3 design files?
From the mFulmini/engineer repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the BRD3 design in my own project?
The repository has no license, so all rights stay with mFulmini. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the BRD3 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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