2 layers63.2 × 27.7 mm
ESPCameleonV2
Alan-GIRAUDON/ESPCameleonV2
ESPCameleonV2 is an ESP32 Camera PCB. It resolve the biggest issues of its first version, ESP32Cameleon. This board allow video capture and streaming through WiFi or USB.
47 partsMIT
2 layers64.4 × 38.9 mm
ESPCameleon
Alan-GIRAUDON/ESPCameleonESPCameleon is an ESP32 Camera PCB. It takes most of its design from the AI Thinker ESP32-Cam and adapt it to use the ESP32-S2-MINI-2-N4R2. This board allow video capture and streaming through WiFi or USB.
- Size
- 64.4 × 38.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 56
- Pads
- 210
- Tracks, vias
- 581, 172
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 Nov 2024
- Updated
- 4 Dec 2024
Overview
ESPCameleon is an open-source printed circuit board by Alan-GIRAUDON, from the Alan-GIRAUDON/ESPCameleon repository on GitHub, published under the MIT licence. It is a 2-layer board of 64.4 × 38.9 mm with 45 parts on 56 nets, routed with 581 tracks and 172 vias.
It is built around the AMS1117-3.3, XC6206P122MR and XC6206P282MR, with the MDD2301 among its other parts. Its parts include 14 capacitors, 9 resistors, 4 ICs, 4 connectors and 3 diodes. It belongs with the ESP32 boards of this library.
Main components
4
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
XC6206P122MR
SOT-23SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
XC6206P282MR
SOT-23-3L-40℃~+85℃ 1 150mV@(100mA) 1uA 2.8V 200mA 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsMDD2301
SOT-23-50℃~+150℃ 1 P-Channel 20V 3.8A 330pF 33mΩ@4.5V 45pF 50pF 700mV 800pC 900mW SOT-23 MOSFETs ROHSMDDMOSFETs
README
README.mdESPCameleon
Summary of the project
ESPCameleon is an ESP32 Camera PCB. It takes most of its design from the AI Thinker ESP32-Cam and adapt it to use the ESP32-S2-MINI-2-N4R2. This board allow video capture and streaming through WiFi or USB.
Schematics
Features
- Micro-USB connector to directly program and power the board
- LDO converters, 3V3 for the ESP32, SD card and LED's, 1V2 and 2V8 for the camera
- RESET button to reset the ESP32 and BOOT button to activate the ESP32 USB boot mode
- FPC connector 24 pins for the camera (tested OV2640, should support OV5640 despite voltage difference)
- Micro-SD card reader to store videos
- White and yellow LED's for debugging and status indicating, red power LED
- Pin header to expose the ESP32 UART interface, some GPIOS, the 3V3 rails and GND
PCB caracteristics
The PCB is a two layer board with single-sided assembly, the thinnest trace is 0.1562 mm and the vias have a 0.7 mm diameter ring and a 0.3 mm hole. The USB traces are as short and as thick as possible to be as close as possible to the 90 $\Omega$ impedance of the JLCPCB two-layer board stackup.
Board results :
Programming
The board can be "easily" programmed with both ESP-IDF and Arduino IDE but the later is much faster to get working.
For the arduino IDE, you just need to download the ESP32 boards configurations. Select board "ESP32S2 Dev module", enable "USB CDC on boot", "upload mode" as "internal USB". For the camera webserver example (File->Example->ESP32->Camera->CameraWebServer), you should set "PSRAM" as "enabled", enter your Wifi credentials and update the camera_pins.h to match the board (an example is given in my CameraWebServer2 repository).
An example of streaming through the USB port is available in the USBCameraStreaming repository. It contains an Arduino script to send JPEG images via USB and a Basic Flutter android app to receive and display the video stream.
Current Issues and TO DO list
- There are traces and ground pours around the ESP32 antenna which interfere with Wifi communication (reduce range and sensibility to noise). The traces should be moved and the copper pours removed. An even better way, is to put the antenna outside of the PCB (see https://cdn.sparkfun.com/assets/5/2/8/9/4/esp32-s2_hardware_design_guidelines.pdf#page=15)
- The buttons are bulky, they could be changed or even replaced by a plated hole
- An external PSRAM could allow for a better image quality and allow to switch to an ESP32S2 without PSRAM included (cheaper and in Economic assembly for JLCPCB)
- The Micro-USB connector could be replaced with a more modern USB-C
Most of those issues are addressed in the ESP32CamelonV2 repository.
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10u | Capacitor_SMD:C_0402_1005Metric | C2, C4, C6, C7, C8, C10 |
| 5 | 1k | Resistor_SMD:R_0402_1005Metric | R2, R4, R6, R7, R9 |
| 4 | 100n | Capacitor_SMD:C_0402_1005Metric | C3, C9, C11, C13 |
| 4 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R3, R5, R8 |
| 4 | LOGO | LOGO | G***, G***, G***, G*** |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C1, C14 |
| 2 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1, SW2 |
| 1 | 100u | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B | C5 |
| 1 | 15p | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J5 |
| 1 | Conn_01x26 | ESPCameleon:AFC01_S24FCA_00 | J3 |
| 1 | ESP32_S2_MINI_2_N4R2 | ESPCameleon:ESP32-S2-MINI-2 | U4 |
| 1 | LEDR | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | LEDW | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | LEDY | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | MDD2301 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Micro_SD_Card | ESPCameleon:GCT_MEM2075-00-140-01-A | J2 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_XKB_U254-051T-4BH83-F1S | J1 |
| 1 | XC6206P122MR | Package_TO_SOT_SMD:SOT-23-3 | U3 |
| 1 | XC6206P282MR | Package_TO_SOT_SMD:SOT-23-3 | U1 |
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Questions
How big is the ESPCameleon PCB?
It measures 64.4 × 38.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ESPCameleon use?
45 parts, built around the AMS1117-3.3, XC6206P122MR, XC6206P282MR and MDD2301. 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 ESPCameleon KiCad files?
From the Alan-GIRAUDON/ESPCameleon repository on GitHub, at the commit this page was made from: the board is ESPCameleon.kicad_pcb and its schematic ESPCameleon.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESPCameleon design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).