Antibacterial Cold Plasma Generator – 100 kHz · 40 kV Variable High-Voltage High-Frequency System

Fully Designed, Built & Controlled with Embedded ATmega328 + Real-Time Condition Monitoring
2021

Supervisor: Dr. Borna Beigzadeh – Head of Biomechatronics and Cognitive Engineering Lab (BACE), Iran University of Science and Technology
Student & Lead Designer: Ali Bagheri (B.Sc. MechE & CompE)

Project Highlights

• Variable output: 100 kHz – 40 kV cold atmospheric plasma generator
• Full custom power electronics chain: Function generator → Pre-driver → MOSFET bridge → Ferrite transformer → HV output
• Embedded real-time monitoring: Temperature (MOSFET + transformer), arc detection, over-current protection
• Safety-first design: Isolated feedback, soft-start, automatic shutdown
• All circuits designed, PCB routed, wound ferrite transformer, assembled and tested by me

System Block Diagram

Hardware Gallery

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Key Technical Areas Covered

• High-frequency high-voltage power electronics
• Ferrite transformer design & winding
• Full-bridge MOSFET driver with dead-time control
• Analog & digital signal conditioning
• Embedded C programming (ATmega328P – Arduino core)
• PCB design (KiCad)
• Safety & EMI considerations

Outcome

Stable, repeatable cold plasma jet successfully generated and used in preliminary biomedical tests at BACE Lab.

Author & Contact

Ali Bagheri
B.Sc. Mechanical Engineering & Computer Engineering – IUST 2025
Email: [email protected]
GitHub: @aibgr
LinkedIn: Ali-Bagheri

If you find this project useful or inspiring, please give it a STAR
Schematics and firmware will be released after related publications.

One of my earliest full-stack hardware projects – still one of my favorites!