4 layers50 × 22.9 mm
4 layers18 × 51.3 mm
ATesp32
SreeniEadara/ATesp32esp32s3 board that has an identical footprint and similar pinout to the ATmega32.
- Size
- 18 × 51.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 51
- Nets
- 97
- Pads
- 266
- Tracks, vias
- 319, 181
- Pours
- 27
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 Nov 2024
- Updated
- 7 Jan 2025
Overview
ATesp32 is an open-source printed circuit board by SreeniEadara, from the SreeniEadara/ATesp32 repository on GitHub. It is a 4-layer board of 18 × 51.3 mm with 51 parts on 97 nets, routed with 319 tracks and 181 vias.
It is built around the ESP32-S3FH4R2, AP2112K-3.3 and NSR0320MW2, with the DMP2045U among its other parts. Its parts include 15 capacitors, 14 resistors, 5 ICs, 5 diodes and 2 connectors. It belongs with the ESP32 boards of this library.
Main components
4
ESP32-S3FH4R2
QFN-56(7x7)-104.5dBm -40℃~+85℃ 2.4GHz 21dBm 340mA 3V~3.6V 88mA Bluetooth5.0 LX7 Chip UART、SDIO、SPI、I2C、JTAG QFN-56(7x7) WiFi Modules ROHSEspressif SystemsWiFi Modules
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
NSR0320MW2
SOD-323-55℃~+125℃ 1 Independent 1A 20V 500mV@900mA 50uA@15V 5A SOD-323 Schottky Diodes ROHSonsemiSchottky Diodes
DMP2045U
SOT-23-55℃~+150℃ 1 P-Channel 1.7W 190pF 1V 20V 4.1A 7.8nC@4.5V 740pF 75mΩ@2.5V P-Channel SOT-23 MOSFETs ROHSTECH PUBLICMOSFETs
README
README.mdATesp32
This is an ATmega32A replacement that uses the ESP32-S3. Why? Because I bought ATmega32-based keyboard PCBs (the Discipline), love it and want to add wireless capabilities (BLE) and native USB.
I've made efforts to maintain the same number of GPIO, but there will be many differences you would encounter if trying to use this as an ATmega32A replacement. These would include logic levels, availability of analog pins, clock, etc.
Thank you to Adafruit for making the Feather and QtPy boards for the ESP32-S3! I heavily referenced these in this design. https://github.com/adafruit/Adafruit-Feather-ESP32-S3-PCB https://github.com/adafruit/Adafruit-QT-Py-ESP32-S3-PCB/tree/main
Call me an Adafruit shill if you will, but you can support open hardware by purchasing from them.
Parts
51| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C5, C6, C7, C10, C15 |
| 5 | 10uF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C13, C14, C17 |
| 5 | 5.1K | Resistor_SMD:R_0402_1005Metric | R5, R6, R7, R14, R15 |
| 3 | 100K | Resistor_SMD:R_0402_1005Metric | R2, R4, R8 |
| 3 | 10K | Resistor_SMD:R_0402_1005Metric | R1, R3, R13 |
| 3 | LED_Small | LED_SMD:LED_0402_1005Metric | D2, D5, D6 |
| 2 | 16pF | Capacitor_SMD:C_0402_1005Metric | C11, C12 |
| 2 | NSR0320 | Diode_SMD:D_SOD-323 | D1, D4 |
| 2 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP7, JP8 |
| 2 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4, JP6 |
| 1 | 1.2pF | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 1pF | Capacitor_SMD:C_0402_1005Metric | C8 |
| 1 | 2.7nH | Inductor_SMD:L_0402_1005Metric | L2 |
| 1 | 20K | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | 40 MHz | Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | Y1 |
| 1 | 47K | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 499 | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | Antenna_Chip | RF_Antenna:Johanson_2450AT18x100 | AE1 |
| 1 | BOOT | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | SW2 |
| 1 | CP2102N-Axx-xQFN24 | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U5 |
| 1 | DMP2045U | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ESP32-S3FH4R2 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP4x4mm | U1 |
| 1 | HEADER | Package_DIP:DIP-40_W15.24mm | U2 |
| 1 | JST PH | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J2 |
| 1 | MCP73832T-2 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | RESET | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | SW1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
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Questions
How big is the ATesp32 PCB?
It measures 18 × 51.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the ATesp32 use?
51 parts, built around the ESP32-S3FH4R2, AP2112K-3.3, NSR0320MW2 and DMP2045U. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the ATesp32 KiCad files?
From the SreeniEadara/ATesp32 repository on GitHub, at the commit this page was made from: the board is ATesp32.kicad_pcb and its schematic ATesp32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ATesp32 design in my own project?
Its repository states no licence, so its author keeps all rights: ask SreeniEadara before reusing the design.