John Ruthroff Email & Phone Number

Watford, Hertfordshire, Gb

Novi, Michigan, Us

Managed all aspects of electrical circuit development, Interfacing with customer to establish design criteria, collaborating with design team, developing circuits, supervising technicians on building prototypes, designing test stations, releasing to production, and following up on customer issues. • Generated $1M in annual sales by developing non-contact torque sensing probe for Case-New Holland using flux-gate technology. Interfaced with Mechanical and Production Engineers, ensuring continuity. Created schematic, BOM and Gerber files. Built and implemented software algorithms to process signals into real time torque measurements. Designed automatic microprocessor-based probe calibration system. • Generated $280M in sales / 15M units by creating Front Axle Disconnect Actuator (FAD) control circuit, using non-contact Hall sensing for Chrysler and General Motors. Physical circuit variations were generated. • Drove actuator design to work in environments of -40°c to 150°C and high vibrations. • Functioned as Lead Electrical Engineer on Integrated Park Module for Ford meeting Functional Safety requirements. The electronics board uses an integrated H-bridge DC Motor Driver including thermal shutoff and current protection with 1st generation unit in production and 2nd generation unit in developm • Opened company to new market by supporting Engineering team on successful Development of CAN based Turbo Charger Actuator for Honeywell. Constructed 3-phase Brushless Motor based rotary actuator, using a microprocessor and dedicated Mosfet driver IC. Worked with team to create in-house brushless motor capability. • Designed Actuator for high temperature and high vibration Commercial Truck use. • Created software algorithm for sinewave drive of Brushless Motor & software to improve output position control. • Verified product performance by building test set including software (C and Visual Basic).

Solved standing problems allowing in-house design team to move forward. Collaborated on development of an arc fault detection product for aviation sector. Utilized multi-layer flex circuit using DSP processor. Solved a lightning strike failure problem allowing team to continue development. Generated arc fault library of waveforms for testing.

Developed the electronic circuits for moisture analyzer capable of measuring moisture in Parts Per Billion. Circuits included 2 heater controllers with total power rating of 350 watts, 24 bit A / D multiplexed front end for low level signal measuring using differential techniques and a Motorola Mcore processor section.

Master Of Science - Ms, Electrical And Electronics Engineering

Bachelor Of Engineering - Be, Electrical And Electronics Engineering