PrettySmallRobot
About the PrettySmallRobot PCB
PrettySmallRobot is an open source ESP32 PCB design by wattnotions, published on GitHub. It is a 4-layer board measuring 26 × 29 mm, with 51 components from 28 distinct parts.
Its main chip is the ESP32-S2, from the ESP32 family. Other key parts include the DRV8837, MCP73831-2ACI_MC and AP2112K-3.3. By type, the board carries 24 capacitors, 8 resistors, 5 ICs, 4 connectors, 4 diodes and 2 inductors.
Main components on the PrettySmallRobot
PrettySmallRobot bill of materials (BOM)
51 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | DRV8837 | WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm | U1, U2 |
| 1 | MCP73831-2ACI_MC | SON50P200X300X100-9N | U3 |
| 1 | ESP32-S2 | QFN-56-1EP_7x7mm_P0.4mm_EP5.6x5.6mm | U4 |
| 1 | AP2112K-3.3 | SOT-23-5 | U6 |
| 1 | 12pF/40MHz | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | TYPE-C-31-M-12 | HRO_TYPE-C-31-M-12 | J1 |
| 3 | Conn_01x02 | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J8, J9, J10 |
| 1 | Antenna | C_1206_3216Metric | AE1 |
| 2 | SW_Push | SW_SPST_B3U-1000P | BOOT1, RST1 |
| 1 | LED | LED_0402_1005Metric | D1 |
| 2 | D_Schottky | D_SOD-323 | D2, D3 |
| 1 | USR_LED | LED_0402_1005Metric | D4 |
| 1 | 2nH | L_0402_1005Metric | L1 |
| 1 | 1.8nH | L_0402_1005Metric | L2 |
| 1 | 10uF | C_0603_1608Metric | C1 |
| 9 | 0.1uF | C_0402_1005Metric | C2, C3, C5, C6, C7, C8, C9, C10 +1 |
| 7 | 1uF | C_0402_1005Metric | C4, C16, C19, C20, C22, C23, C24 |
| 2 | 4.7uF | C_0402_1005Metric | C12, C21 |
| 1 | 3.9pF | C_0402_1005Metric | C13 |
| 2 | 12pF | C_0402_1005Metric | C14, C15 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1.8pF | C_0402_1005Metric | C17 |
| 1 | 100pF | C_0402_1005Metric | C18 |
| 2 | 5.1k | R_0402_1005Metric | R1, R2 |
| 1 | 0R | R_0402_1005Metric | R3 |
| 1 | 470R | R_0402_1005Metric | R5 |
| 1 | 2k | R_0402_1005Metric | R6 |
| 2 | 10k | R_0402_1005Metric | R7, R9 |
| 1 | 1K | R_0402_1005Metric | R10 |
PrettySmallRobot design files
The KiCad project lives in the wattnotions/PrettySmallRobot repository on GitHub; these links point at the commit this page was built from.
PrettySmallRobot: common questions
What microcontroller does the PrettySmallRobot use?
The PrettySmallRobot is built around the ESP32-S2, from the ESP32 family.
How big is the PrettySmallRobot PCB?
The PrettySmallRobot measures 26 × 29 mm, has 4 copper layers and is 1.6062 mm thick.
How many components are on the PrettySmallRobot?
51 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the PrettySmallRobot design files?
From the wattnotions/PrettySmallRobot repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the PrettySmallRobot design in my own project?
The repository has no license, so all rights stay with wattnotions. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the PrettySmallRobot 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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