Matthew Stephan Email & Phone Number

Oviedo, FL, US

Fairfax, VA, US

Independent contractor - Electrical/Electronics Engineering

Part of a design team working on new technology in the industrial, medical, commercial and military space. Click on the link to see our capabilities. To learn more about our company please visit www.neotech.com.http://www.neotech.com/locations/naperville-il/

Northbrook, IL, US

• Bluetooth LE hardware and firmware design using C.
• Low power hardware design for use with coin cell batteries.
• ECG system analog front end hardware analysis and re-design.
• Hardware design for microcontroller-based Wi-Fi accessory.
• Hardware design for microcontroller-based AC and DC motor control boards.
• Test fixture hardware and software design using LabVIEW.

• Worked closely with the R&D team to develop hardware and systems used to monitor and control chemistry in cooling, boiling and clean-in-place systems.
• Lead hardware engineer for next generation industrial controller.
• Provided project management activities for assigned projects and new systems.
• Primary point of contact for manufacturing and regulatory approvals of released designs.
• Analyzed and re-designed photosensor amplifier circuitry.
• Analyzed electrode conductivity sensor circuitry and made recommendations for improvements to hardware and software detection algorithms.

Oak Brook, Illinois, US

• Lead hardware engineer for a new platform of AC and DC motor garage door openers.
• Lead hardware engineer for a wireless telephone interface unit.
• Lead hardware and firmware engineer for a motion sensing garage door opener control panel.
• Part of a team tasked with the ground-up re-design of wireless intercom products.
• Participated in the development of proprietary rolling code algorithms and encryption.
• Developed firmware in C for Atmel ATmega microcontrollers.

• Lead software engineer for a CAN bus steering angle sensor module using C.
• Lead software engineer for a LIN bus switch module using C.
• Lead software engineer for a temperature/humidity sensor module using Assembly.
• Developed firmware in assembly for Microchip PIC12F and PIC18F microcontrollers.
• Developed firmware in C for Microchip PIC16F microcontrollers.
• Developed firmware in C for Freescale MC68HC08 microcontrollers.

Oak Brook, Illinois, US

• Lead hardware engineer for a new DC motor gate opener logic board platform.
• Researched various techniques in speed control of single phase and 3-phase AC induction motors.
• Researched the use of solar power for gate opener operation in remote locations.
• Created an in-house conducted emissions test station. Set up and characterized the test equipment and obtained test results in close agreement with outside certified test labs.
• Provided guidance and training to junior level engineers.

Oak Brook, Illinois, US

• Led a team of 3 engineers in the ground-up re-design of hardware and firmware for newly acquired gate opener products. Served as the Marketing liaison to generate requirements. Responsible for firmware development.
• Lead hardware engineer for an external, garage door opener battery back-up accessory. Created and documented the firmware design for hand-off to a software engineer.
• Provided engineering support for new business acquisitions. Analyzed acquired products in detail and analyzed the manufacturing of those products for integration into the Chamberlain design and manufacturing.
• Worked with outside engineering firm in the development of superheterodyne receiver modules.

Oak Brook, Illinois, US

• Designed hardware and firmware in Assembly to control sub-fractional DC motors in garage door openers for the US and European markets.
• Led an effort to solve poor radio performance issues in the presence of DC motor brush noise. Implemented hardware solutions which led to improved range performance.
• Assisted with the development, simulation and tuning of a PID controller for DC motor garage door openers.
• Used a dynamometer to benchmark various motor types. Tuned the PID controller to generate accurate torque/speed curves that were later used for software development. Debugged various hardware issues that prevented the.

Oak Brook, Illinois, US

• Designed hardware for remote controlled, battery powered locks.
• Designed firmware in Assembly for plug-in radio modules.
• Designed analog hardware for automotive anti-theft accessory.
• Designed hardware to detect vibration using a piezoelectric transducer.
• Designed transmitter and receiver circuitry for OOK devices (key FOBs).
• Optimized receiver circuitry performance using impedance matching techniques, vector network analyzers and Smith charts.