Smart Humidity Sensor Design
1:44
Using Knowledge Base Tool.
- Add core parts: ESP32 module, Humidity sensor I2C, DC barrel jack, 3.3V buck regulator.
- Add passives: 100nF capacitor, 1uF capacitor, 10uF capacitor per IC, 4.7k resistor for SDA/SCL pull-ups, ESP32 boot/config resistors, and Test point pads for programming.
- Wire nets: 5 V to regulator to 3.3 V rails; I2C (SDA/SCL with pull-ups); sensor power; ESP32 EN/IO0 for boot/program.
- Layout: place ESP32 at board edge with antenna keep-out; auto-place/route; run checks.
Started implementing a plan
#Goal
- Design a smart humidity sensor board that integrates an ESP32 module for WiFi/Bluetooth connectivity and an I2C humidity sensor, powered by a 5 V DC barrel jack with an onboard 3.3 V buck regulator. The design must include all necessary passives such as decoupling capacitors (100 nF, 1 µF, 10 µF per IC), I2C pull-ups (4.7 kΩ), ESP32 boot and programming configuration components, and maintain an antenna keep-out area near the board edge.
#Implementation plan
1. Core Components and Power Subsystem
1. Add the ESP32 WiFi/Bluetooth module.
2. Add a generic I2C humidity sensor.
3. Insert a 5 V DC barrel jack for power input.
4. Include a 3.3 V buck regulator to create the 3.3 V rail for the ESP32 and sensor.
2. Supporting Components
1. Add decoupling capacitors (100 nF, 1 µF, and 10 µF) at each IC power pin.
2. Place I2C pull-ups (4.7 kΩ resistors) on the SDA and SCL lines.
3. Include boot/config resistors and dedicated programming test pads for the ESP32 module.
3. Connectivity and Schematic Wiring
1. Connect the 5 V barrel jack to the input of the 3.3 V regulator.
2. Route the regulated 3.3 V rail to both the ESP32 and humidity sensor.
3. Wire the I2C bus by connecting the sensor SDA and SCL lines to the ESP32 along with the pull-ups.
4. Connect the ESP32 EN and IO0 lines appropriately for boot and programming modes.
4. PCB Layout and Routing
1. Place all components using Auto-Layout, ensuring that the ESP32 module is near the edge for an unobstructed antenna keep-out zone.
2. Route all nets using Auto-Routing, maintaining proper clearances and following PCB best practices.
3. Run design rule checks and manufacturability verification.
#Success criteria
- The schematic includes all active and passive components with proper interconnections, complying with the required voltages and digital communication protocols.
- The PCB layout is complete with all parts placed, a clear antenna keep-out area established, and all nets routed according to best practices.
- The design meets power integrity and signal integrity requirements for reliable operation of WiFi/Bluetooth and I2C communications.
Working...
111d 21:29:47
Started: Change the project description to: "Smart humidity sensor board integrating an ESP32 WiFi/Bluetooth module and I2C humidity sensor, powered by a 5 V DC barrel jack with an onboard 3.3 V buck regulator. Includes per-IC decoupling capacitors (100 nF, 1 µF, 10 µF), 4.7 kΩ I2C pull-ups, ESP32 boot/config resistors and programming test points, and an antenna keep-out area at the board edge. #IoT #HumiditySensor #ESP32 #PowerManagement"
Stopping: undefined
Updated project description
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Updated project description
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Reviews
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