Gönül Demir

Focused on professional development, technical research, and independent engineering work in electronics R&D.

• • Undertook advanced EMC/EMI training through Fresu Electronics’ EMC/EMI Design Course, taught by Dario Fresu, covering practical EMC design, signal and power integrity, PCB return paths, common- and differential-mode noise, PDN design, filtering, and shielding.
• • Developed and documented independent engineering projects, including a 1–30 MHz, 1.3 kW solid-state SP2T RF switch.
• • Strengthened my English communication skills and studied German to A1 level.
• • Published technical articles on sensor systems, optoelectronics, EMC/EMI, analog electronics, and practical hardware design.
• • Built an engineering portfolio documenting projects, design approaches, technical studies, and engineering notes.

Designed the optical arrangement and electronic hardware of a new beam smoke detector from the ground up. Demonstrated a detection range of over 100 m in prototype testing. Reduced bill-of-materials cost by 10% through changes to optical and electronic component selection.

Elevator Door Detection System

Designed the control board, optical arrangement, and power board for the FNC DD series elevator door detector.

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Encoder & Sensor Electronics

Designed and verified electronic hardware for optical and magnetic encoders used in industrial and military applications, including schematic capture and PCB layout.

Developed both hardware and embedded software for diffuse photoelectric sensors. Also developed electronic hardware for time-of-flight (ToF) distance sensors and MEMS-based tilt measurement systems.

Production & Field Support

Supported product introduction into production and investigated manufacturing and field failures. Visited customer sites to diagnose problems under actual operating conditions. Designed test equipment and fixtures to improve the speed, accuracy, and repeatability of production testing.

Detector Design

Designed the electronic hardware for all six models in a beam smoke detector family. For the separate transmitter–receiver models, developed the electronics around an existing optical and mechanical design. For the reflector-based models, designed both the optical arrangement and electronic hardware from the ground up.

Also designed the electronic hardware and developed the initial prototypes of flame detectors.

Testing & Certification

Prepared technical documentation, developed test procedures, and conducted tests for both products I designed and other products in the company’s portfolio. Contributed to successful beam smoke detector certification through BRE/LPCB, TSE, and certification bodies in Bulgaria.

Played an active role in establishing the in-house EMC testing facility and designed dedicated test equipment and fixtures as needed.

Production & Product Improvement

Investigated manufacturing and field failures in products that had been in serial production for years. Contributed to design and process improvements that reduced the manufacturing-related failure rate from 7% to 2% and shortened test times by 15%.

Developed motor-speed measurement circuits and motor-driver boards for the company’s early textile machinery. As the project’s sole electronics engineer, handled hardware design, embedded software, and electronic assembly.

Investigated board failures during high-speed, high-power motor operation, gaining practical experience in electromagnetic interference and its effects on circuit reliability.

Sourced electronic components from suppliers in East Asia and handled technical correspondence with suppliers and customers. A motor-driver development project for a customer provided hands-on electronic design experience and prompted my transition into R&D.