2 layers71.3 × 41.7 mm
2 layers27.9 × 20.3 mm
A PCB that will read a 25AA040A EEPROM using an esp32 devkitC-1
- Size
- 27.9 × 20.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 6
- Nets
- 13
- Pads
- 29
- Tracks, vias
- 43, 0
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 Mar 2025
- Updated
- 2 Apr 2025
Overview
Shield is an open-source printed circuit board by AlexBerryhill, from the AlexBerryhill/25AA040A-Reader repository on GitHub. It is a 2-layer board of 27.9 × 20.3 mm with 6 parts on 13 nets, routed with 43 tracks and 0 vias.
It is built around the ESP32-S3-DEVKITC-1-N8, 25AA040A-I/P and BSS138. Its parts include 2 resistors, 2 ICs and 1 transistor. It belongs with the ESP32 boards of this library.
Main components
3
ESP32-S3-DEVKITC-1-N8
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
25AA040A-I/P
PDIP-8-40℃~+85℃ 1,000,000 cycles 1.8V~5.5V 10MHz 200 Years 4Kbit 5ms Hardware write protection function、Built-in power-on reset (POR)、Built-in write enable latch (WEL) SPI PDIP-8 EEPROM ROHSMicrochip TechnologyEEPROM
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
README
README.md25AA040A Reader
A PCB that will read a 25AA040A EEPROM using an esp32 devkitC-1
Parts
6| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | R_US | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | 25aa040a-i/p | footprints:PDIP8_300MC_MCH | U1 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ESP32-S3-DevKitC | PCM_Espressif:ESP32-S3-DevKitC | U2 |
| 1 | LOGO | LOGO | G*** |
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Questions
How big is the Shield PCB?
It measures 27.9 × 20.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Shield use?
6 parts, built around the ESP32-S3-DEVKITC-1-N8, 25AA040A-I/P and BSS138. 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 Shield KiCad files?
From the AlexBerryhill/25AA040A-Reader repository on GitHub, at the commit this page was made from: the board is Shield/Shield.kicad_pcb and its schematic Shield/Shield.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Shield design in my own project?
Its repository states no licence, so its author keeps all rights: ask AlexBerryhill before reusing the design.