From 66cb74a9c83be23f57b858a4dc5b5a2697ffd896 Mon Sep 17 00:00:00 2001
From: ruben <ruben@schoonbaert.net>
Date: Wed, 2 Jul 2025 16:03:27 +0000
Subject: [PATCH] 'README.md' toevoegen

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+# WiFi-Controlled RGB Power Lamp
+
+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.
+
+---
+
+## Overview
+
+- **Microcontroller**: ESP8266 (ESP-12E)
+- **LED Drivers**: LM3404, one per color channel
+- **Current Sensors**: INA226 (I²C), one per channel
+- **Power Supply**: 24V DC input, regulated to 5V and 3.3V
+- **User Interface**: Web application hosted on ESP8266 for RGB control and power monitoring
+
+---
+
+## System Architecture
+
+
+**Block Diagram:**
+
+![Block Diagram](assets/block_diagram.png)
+
+---
+
+## Web Interface
+
+- RGB control using Vue-based color picker
+- Adjustable brightness slider (mapped to PWM)
+- Real-time current monitoring (INA226)
+- Basic animation mode (rainbow sequence)
+
+**Web UI Screenshot:**
+
+![Web UI](assets/web_ui.png)
+
+---
+
+## PCB Design
+
+- 2-layer FR4 PCB with thermal copper pours and via stitching
+- Test points for PWM, switch nodes, and sense lines
+- FFC interface for external programmer
+- Custom CH340C programming board (USB → UART)
+
+**Top View:**
+
+![PCB Top](assets/pcb_top.png)
+
+**Bottom View:**
+
+![PCB Bottom](assets/pcb_bottom.png)
+
+**3D Render:**
+
+![3D PCB Render](assets/pcb_render.png)
+
+---
+
+## Testing and Analysis
+
+### Thermal Imaging
+
+- Thermal images captured using Fluke thermal camera
+- Red LED remains coolest; green and blue require better cooling
+- Thermal deviation from calculated values due to PCB/slug bonding
+
+**Thermal Measurement Example:**
+
+![Thermal Image](assets/thermal_camera.png)
+
+### Oscilloscope Measurements
+
+- Switching ripple observed and confirmed within expected range
+- DCM ringing noted at switch nodes; no impact on operation
+
+**PWM and Switching Signals:**
+
+![Scope PWM](assets/scope_pwm.png)
+
+---
+
+## Known Issues & Improvements
+
+- **DIM Pin Fix**: Initial circuit caused full brightness during MCU boot. Fixed with pulldown resistor.
+- **I²C Line Reversal**: SDA/SCL reversed in layout; resolved via software GPIO reassignment.
+- **Thermal Solution**: Future revisions should consider external heatsink or aluminum-core PCB.
+
+---
+
+## Project Files
+
+- `/hardware/` – KiCad PCB and schematics
+- `/firmware/` – ESP8266 Arduino code
+- `/docs/` – Original PDF report
+- `/assets/` – Images and diagrams
+
+---
+
+## Full Report
+
+All design calculations, schematics, measurements, and references are available in the final report:
+
+[📄 Project_RubenSchoonbaert.pdf](docs/Project_RubenSchoonbaert.pdf)
+
+---
+