Technical Specifications
Input
220V AC, 50Hz
Controller
ESP32
Output
0–200V DC
Accuracy
±5%
Project Overview
This system enables precise control of AC-DC conversion via phase-angle modulation. The ESP32 detects zero-crossing using an optocoupler, triggers the BT136 TRIAC via MOC3021, and rectifies the output to DC. Firing angle (alpha) is adjustable via UART or IoT.
Key Features
Zero Crossing Detection
Optocoupler-based accurate phase reference
TRIAC Triggering
MOC3021 isolates and drives BT136
Full-Wave Rectification
Bridge rectifier for stable DC output
Alpha Control
UART & IoT-based firing angle tuning
IoT Monitoring
Remote control and data logging
Achievements
Achieved ±5% Voltage Regulation Accuracy
Key Learnings
Phase-Angle Modulation
Mastered TRIAC firing delay calculation for precise DC output control.
ESP32 ZCD Interfacing
Implemented interrupt-driven zero-cross detection with optocoupler isolation.
IoT Power Control
Integrated Wi-Fi for remote alpha tuning and real-time monitoring.
Target Audience
- Power electronics engineers
- IoT & embedded systems developers
- Industrial automation specialists
- R&D and academic researchers
Applications
- Battery charging systems
- DC motor speed control
- LED dimming & lighting
- Industrial process control