MaxESP M
About the MaxESP M PCB
MaxESP M is an open source ESP32 PCB design by EmersonEE, published on GitHub. It is a 2-layer board measuring 74 × 100 mm, with 61 components from 29 distinct parts.
Its main chip is the ESP32-38pin, from the ESP32 family. Other key parts include the LM7805CT, L7812CV, WEMOS_C3_mini and TMC2209. By type, the board carries 16 capacitors, 16 resistors, 13 connectors, 8 ICs, 6 diodes and 1 buzzer.
Main components on the MaxESP M
MaxESP M bill of materials (BOM)
61 components, 29 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-38pin | NODEMCU-ESP32S-NARROW | U1 |
| 1 | LM7805CT | TO-220-3_Vertical | U2 |
| 1 | L7812CV | TO-220-3_Vertical | U3 |
| 1 | WEMOS_C3_mini | WEMOS_C3_mini | U4 |
| 4 | TMC2209 | D_TMC2209_Or | U5, U6, U7, U8 |
| 1 | DC | BarrelJack_Horizontal | J1 |
| 1 | ON/OFF | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J2 |
| 1 | PJ-325M/3.5MM BOOMELE | Jack_3.5mm_CUI_SJ1-3535NG_Horizontal | J3 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | RJ12 | RJ12_Amphenol_54601-x06_Horizontal | J6 |
| 1 | ~ | Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J7 |
| 1 | ~ | PinHeader_1x03_P2.54mm_Vertical | J8 |
| 1 | RTC | DS3231-RTC-24C32-EEPROM-SINGLE-HEADER | J9 |
| 4 | RJ45 | RJ45_Amphenol_54602-x08_Horizontal | J10, J11, J12, J13 |
| 1 | VOL SEL | PinHeader_1x02_P2.54mm_Vertical | J14 |
| 1 | Buzzer | Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | Fuse | Fuse_5x22mm | F1 |
| 4 | SS310 | D_SMA | D1, D2, D5, D6 |
| 1 | POWER_LED | LED_0805_2012Metric_Pad1.15x1.40mm | D3 |
| 1 | STATUS_LED | LED_0805_2012Metric_Pad1.15x1.40mm | D4 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10uF | C_Elec_8x6.2 | C1 |
| 1 | 330nF | C_0805_2012Metric_Pad1.18x1.45mm | C2 |
| 8 | 100nF | C_0805_2012Metric_Pad1.18x1.45mm | C3, C4, C5, C6, C9, C10, C11, C12 |
| 2 | 100uF | C_0805_2012Metric_Pad1.18x1.45mm | C7, C8 |
| 4 | 100uF | C_Elec_8x10.2 | C13, C14, C15, C16 |
| 10 | 2.4K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R4, R5, R6, R7, R8, R9 +2 |
| 1 | 240 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 4 | 4.7K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R13, R14, R15 |
| 1 | 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16 |
MaxESP M design files
The KiCad project lives in the EmersonEE/My_KiCad repository on GitHub; these links point at the commit this page was built from.
MaxESP M: common questions
What microcontroller does the MaxESP M use?
The MaxESP M is built around the ESP32-38pin, from the ESP32 family.
How big is the MaxESP M PCB?
The MaxESP M measures 74 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MaxESP M?
61 components, from 29 distinct parts. The full bill of materials is listed on this page.
Where can I download the MaxESP M design files?
From the EmersonEE/My_KiCad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the MaxESP M design in my own project?
The repository has no license, so all rights stay with EmersonEE. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the MaxESP M 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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