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# PowerRGB
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This project implements a high-power RGB LED lighting system controlled via WiFi. The lamp uses three 5W LEDs, each regulated by a dedicated LM3404 LED driver and monitored by an INA226 current sensor. An ESP8266 (ESP-12E) microcontroller manages wireless control and power monitoring through a web interface.
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Designed as part of a 2024–2025 power electronics curriculum, the project emphasizes practical hardware design, power regulation, thermal analysis, and embedded software integration.
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# WiFi-Controlled RGB Power Lamp
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This repository documents the design and implementation of a WiFi-controlled RGB lamp using discrete power electronics and embedded systems. The lamp is based on 3× 5W LEDs (RGB), driven by LM3404 constant-current drivers, monitored by INA226 current sensors, and controlled by an ESP8266 microcontroller via a custom web interface.
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---
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## Overview
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- **Microcontroller**: ESP8266 (ESP-12E)
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- **LED Drivers**: LM3404, one per color channel
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- **Current Sensors**: INA226 (I²C), one per channel
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- **Power Supply**: 24V DC input, regulated to 5V and 3.3V
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- **User Interface**: Web application hosted on ESP8266 for RGB control and power monitoring
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---
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## System Architecture
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**Block Diagram:**
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---
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## Web Interface
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- RGB control using Vue-based color picker
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- Adjustable brightness slider (mapped to PWM)
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- Real-time current monitoring (INA226)
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- Basic animation mode (rainbow sequence)
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**Web UI Screenshot:**
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---
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## PCB Design
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- 2-layer FR4 PCB with thermal copper pours and via stitching
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- Test points for PWM, switch nodes, and sense lines
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- FFC interface for external programmer
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- Custom CH340C programming board (USB → UART)
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**Top View:**
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**Bottom View:**
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**3D Render:**
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---
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## Testing and Analysis
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### Thermal Imaging
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- Thermal images captured using Fluke thermal camera
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- Red LED remains coolest; green and blue require better cooling
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- Thermal deviation from calculated values due to PCB/slug bonding
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**Thermal Measurement Example:**
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### Oscilloscope Measurements
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- Switching ripple observed and confirmed within expected range
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- DCM ringing noted at switch nodes; no impact on operation
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**PWM and Switching Signals:**
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---
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## Known Issues & Improvements
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- **DIM Pin Fix**: Initial circuit caused full brightness during MCU boot. Fixed with pulldown resistor.
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- **I²C Line Reversal**: SDA/SCL reversed in layout; resolved via software GPIO reassignment.
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- **Thermal Solution**: Future revisions should consider external heatsink or aluminum-core PCB.
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---
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## Project Files
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- `/hardware/` – KiCad PCB and schematics
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- `/firmware/` – ESP8266 Arduino code
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- `/docs/` – Original PDF report
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- `/assets/` – Images and diagrams
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---
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## Full Report
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All design calculations, schematics, measurements, and references are available in the final report:
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[📄 Project_RubenSchoonbaert.pdf](docs/Project_RubenSchoonbaert.pdf)
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---
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