Control Board
About the Control Board
Control Board is an open source ESP32 PCB design by briandorey, published on GitHub under the MIT license. It is a 2-layer board measuring 50 × 35 mm, with 38 components from 31 distinct parts.
Its main chip is the ESP32-WROOM-32D, from the ESP32 family. Other key parts include the LP3878MR-ADJ and SN74AHCT1G125DBVR. By type, the board carries 9 capacitors, 5 resistors, 3 ICs, 3 connectors, 2 switches and 2 diodes.
From the project
RGB LED ring light for a microscope with an ESP32 controller
The firmware folder contains the firmware for the ESP32 module
The 3D Models folder contains design files for the plastic case.
More details about this project are on my blog at https://www.briandorey.com/post/esp32-rgb-led-microscope-ringlight
Main components on the Control Board
Control Board bill of materials (BOM)
38 components, 31 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LP3878MR-ADJ | SOIC-8EP_150mil | U1 |
| 1 | ESP32-WROOM-32D | ESP32-WROOM-32D | U2 |
| 1 | SN74AHCT1G125DBVR | SOT95P280X145-5N | U4 |
| 1 | DEBUG | Test_Pads_3_Pin | J1 |
| 1 | ROTARY ENCODER | RHDRV5W80P254_5X1_1320X250H875_AP1 | J2 |
| 1 | 694108301002 | CUI_PJ-035DH | J3 |
| 1 | SMD/RREC2.0X4.0 | Lead_1.00mm | DOUT0 |
| 2 | SMD/RREC2.0X4.0 | Lead_2.00mm | GND0, V+0 |
| 3 | SMD/RREC2.0X4.0 | Lead_1.00mm_IO16 | IO16, IO17, IO18 |
| 3 | PAD | Pad | Pad1, Pad2, Pad3 |
| 1 | RESET | EVQPT9A15 | S1 |
| 1 | BOOT | EVQPT9A15_S2 | S2 |
| 1 | 3V3 | SMD_R1.3x1.3 | TP1 |
| 1 | — | dummyfp0 | UNK_HOLE_0 |
| 1 | — | dummyfp1 | UNK_HOLE_1 |
| 1 | — | dummyfp2 | UNK_HOLE_2 |
| 1 | — | dummyfp3 | UNK_HOLE_3 |
| 1 | WiFi | DIO_0805 | D1 |
| 1 | Power | DIO_0805 | D2 |
| 1 | 100nF | CAP_0603_M | C1 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 47uF | CAP_1210_M | C2 |
| 2 | 22uF | CAP_1210_M_C3 | C3, C4 |
| 1 | 100nF | CAP_0603_M_C5 | C5 |
| 1 | 10nF | CAP_0603_M_C6 | C6 |
| 1 | 100nF | CAP_0603 | C7 |
| 1 | 100nF | CAP_0603_C8 | C8 |
| 1 | 100nF | CAP_0603_C10 | C10 |
| 1 | 2K | RES_0603 | R1 |
| 1 | 1K | RES_0603_R2 | R2 |
| 1 | 10K | RES_0603_R3 | R3 |
| 2 | 220R | RES_0603_R6 | R6, R7 |
Control Board design files
The KiCad project lives in the briandorey/ESP32-RGB-Microscope-LED-Ring-Light repository on GitHub; these links point at the commit this page was built from.
Control Board: common questions
What microcontroller does the Control Board use?
The Control Board is built around the ESP32-WROOM-32D, from the ESP32 family.
How big is the Control Board?
The Control Board measures 50 × 35 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Control Board?
38 components, from 31 distinct parts. The full bill of materials is listed on this page.
Where can I download the Control Board design files?
From the briandorey/ESP32-RGB-Microscope-LED-Ring-Light repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Control Board design in my own project?
Yes, under the terms of its MIT license, which briandorey chose for the repository.
Can I test firmware for the Control 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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