Roy Stevens

Hudson, Ohio, United States Contact Info
13K followers 500+ connections

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About

I am owner and co-founder of a premier custom electronics design and manufacturing…

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Activity

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Experience & Education

  • Henway Technologies, Ltd

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Projects

  • Portfolio of Projects

    - Present

    You can see some of Henway's work at https://www.henwaytech.com/portfolio

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  • Nuclear power plant data logger

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  • Designed a circuit to behave like a thermocouple to "fake out" $500k 3D printing machines for the aerospace industry (complete with LCD screen and intuitive user control and data logging) (small signal, precision, open loop analog design)

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  • ‘Learn electronics’ development boards for a client’s Kickstarter campaign

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  • 16 channel relay I/O controller with flammable gas sensor, accelerometers, and Bluetooth control for high power water jets (industrial, high reliability)

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  • 20 input ADC input / DAC output controller with better than 1% accuracy over temp range (PLC controller for Robotics/automation industry)

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  • Automatic “follow me” temperature voting system for large office complexes (wifi, Bluetooth)

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  • Automotive diagnostic port learning/expansion platform (DB2 port access)

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  • Automotive sump pump motor controller for extracting water samples from deep wells in landfills (high power closed loop motor controller, dry well detection, locked rotor detection, intuitive HMI)

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  • Baby formula dispenser (vibrating motor control and HMI)

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  • Battery powered printed ink force sensor readout device for athletes and aiding doctors in wrapping casts (printed electronics)

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  • Bluetooth telemetry bridge to convert Bluetooth signal from a tablet to a high powered radio for the drone industry (high power RF modules, Bluetooth)

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  • Cellular Alert/Data logger for oil temperature and relative humidity inside power grid transformers

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  • Cellular credit card machines

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  • Control panels for misc. applications (dials, switches, LEDs)

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  • Dead reckoning and collision detection data logger for oil pipelines (Bluetooth, low power, creative power on/off circuitry)

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  • Deep sea fishing reel line counter, motor driver, and auto-stop feature (Bluetooth interface)

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  • Emergency 2-way communication radio for nursing home patients (microphone and speaker, wifi)

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  • Energy management toolbox (IR sensors, air flow sensors, pressure sensor, energy usage monitor, total harmonic distortion sensor/data logger)

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  • Exercise bike for physical therapy patients (Wheatstone bridge front end, force sensors, HMI)

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  • Hand held AC motor driver for automotive paint mixing machines (AC/DC isolation & safety)

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  • Internet security / password dongles (wearables)

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  • Many circuit designs for assisting in the development/testing/debugging/quality assurance of design projects

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  • Many SMT assembly and electromechanical assembly jobs

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  • Motor controller and sensor supervisor for roll-your-own cigarette machines (integrating new functionality into an existing system with minimal changes)

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  • Nuclear power plant event supervisor

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  • Pressure sock data logger for athletes (small size, wearable, synchronizing two Bluetooth radios with one smartphone app)

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  • Remote alarm for HVAC systems in old/abandoned buildings (interfacing to an off-the-shelf cellular modem)

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  • RF muscle wire controller for steerable parachutes (military, closed loop control) - Wireless virtual reality gloves (9-DOF sensor array, Bluetooth, battery management)

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  • singing/dancing electronic greeting card design

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  • Smart Police cruiser light bar (complex edge case scenarios, encryption, difficult to test)

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  • StarShower Christmas decorations (high power LEDs, stepper motor, buttons and switches)

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  • Tennis racket tension measurement device (consumer device)

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  • Toy (2x) (motor control, safe battery charging)

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  • Wireless stethoscope for highly contagious patients (Bluetooth audio, low power)

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  • Wireless tail lights for truck/trailers (DB2 port access, cheap RF radio)

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