Chairbot
About the Chairbot PCB
Chairbot is an open source ESP32 PCB design by bullestock, published on GitHub. It is a 2-layer board measuring 66.9 × 100 mm, with 30 components from 17 distinct parts.
Its main chip is the ESP32mini, from the ESP32 family. Other key parts include the PCM5102A module, 74HCT244, buck-converter, Motor_driver and PCA9515. By type, the board carries 8 capacitors, 7 ICs, 7 resistors, 4 connectors, 2 diodes and 1 transistor.
Main components on the Chairbot
Chairbot bill of materials (BOM)
30 components, 17 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32mini | ESP32mini | U1 |
| 1 | PCM5102A module | PCM5102A module | U2 |
| 1 | 74HCT244 | TSSOP-20_4.4x6.5mm_P0.65mm | U3 |
| 1 | buck-converter | buck-converter | U4 |
| 2 | Motor_driver | PinSocket_2x04_P2.54mm_Horizontal | U6, U7 |
| 1 | PCA9515 | TSSOP-8_3x3mm_P0.65mm | U8 |
| 1 | ZXMN4A06G | SOT-223-3_TabPin2 | Q1 |
| 2 | Conn_01x02 | JST_XH_B02B-XH-A_1x02_P2.50mm_Vertical | J1, J3 |
| 1 | Conn_01x05 | JST_XH_B05B-XH-A_1x05_P2.50mm_Vertical | J2 |
| 1 | Micro_SD_Card_Det1 | J_SD_Card-micro_dual | J6 |
| 1 | GND | TestPoint_Loop_D1.80mm_Drill1.0mm_Beaded | TP1 |
| 2 | SS34 | D_SMB | D1, D2 |
| 6 | 100n | C_0603_1608Metric | C1, C2, C6, C7, C10, C11 |
| 2 | 10u | C_0805_2012Metric | C4, C9 |
| 2 | 1K | R_0603_1608Metric | R1, R4 |
| 4 | 10K | R_0603_1608Metric | R2, R3, R6, R7 |
| 1 | 2K2 | R_0603_1608Metric | R5 |
Chairbot design files
The KiCad project lives in the bullestock/chairbot repository on GitHub; these links point at the commit this page was built from.
Chairbot: common questions
What microcontroller does the Chairbot use?
The Chairbot is built around the ESP32mini, from the ESP32 family.
How big is the Chairbot PCB?
The Chairbot measures 66.9 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Chairbot?
30 components, from 17 distinct parts. The full bill of materials is listed on this page.
Where can I download the Chairbot design files?
From the bullestock/chairbot repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Chairbot design in my own project?
The repository has no license, so all rights stay with bullestock. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Chairbot 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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