Nathan Rhoades Email & Phone Number

Taunton, Ma, Us

Taunton, Ma, Us

Milford, Ma, Us

Lead electrical design engineer for latest generation sample manager module for high end liquid chromatography machines.

Electrical Engineering design & consultation, IP holding.

Pocasset, Ma, Us

Lead electrical design engineer for R&D and other supporting enterprises at Hydroid. Responsible for conceptualizing and executing custom PCB solutions for marine robotics, including control electronics, satellite communications, global positioning, power electronics and extremely low current monitoring applications. This particular industry requires rapid prototyping and very efficient time-to-release designs.• Design and development for dual out-runner contra-rotating permanent magnet synchronous motor (PMSM) propeller drive and field-oriented control (FOC) electronics for REMUS 100 and MUUV autonomous underwater vehicle (AUVs) automatic roll control.• Designed emergency warning electronics for sending SMS messages containing GPS location data during critically low battery events or compromised missions.• Designed compact power filter for legacy motor drive to reduce PWM noise from leaking into acoustic transducers, solving customer noise and thermal issues.• Design and development for REMUS 300 modular AUVs including NiMH alternate battery solution, battery current and voltage protection, communication stream control, scuttle actuation and auxiliary power support.• Designed drop-in-replacement analog to digital depth sensor interface board and firmware.• Designed solid state charge/discharge lithium-ion battery conditioning board with over-current protection.• Designed various other sensor, probe, illumination, and power conditioning boards for usage in entire range of AUV products.• Designed all electronic chassis vehicle cabling and wire harnesses for REMUS 100.• Routinely performs technical transfers of electronics from Woods Hole Oceanographic Institution (WHOI) to Hydroid and improved designs for manufacturability.• Role also includes testing and production support, maintaining engineering documentation and redlines, releasing designs through ECN processes, troubleshooting and any other issues that requires electrical technical support.

North Falmouth, Ma, Us

• Research and integration of high performance MEMS-based Attitude and Heading Reference Systems (AHRS) into existing product line of underwater acoustic transponders, including circuit board design for carrier boards.• Circuit board re-design and population for handheld testing device for deep-water acoustic releases.• Integration of acoustic-release testing device into a low-cost communication module for use from ship-deck.• Hand-population of prototype and production-released circuit boards, including many fine-pitched QFNs and 0402-sized SMT components. J-STD-001 coursework completed.• Responsible for factory acceptance testing, diagnosis of failures, customer action requests, and maintenance / design upgrades of test equipment.• Coordinated a series of oceanographic field tests and surveys off the shore of Cape Cod Bay.

Newport, R.I., Us

• Developed hardware and software to automate testing of extremely high dynamic range HF/VHF/UHF digital wideband receivers.• Designed and developed real-time spectrum analyzer software capable of interfacing to vendor-specific digital IF streams for standardized testing and benchmarking of tuner-digitizers and radio receivers.• Designed and built custom analog and RF circuits, including locked-in pulse generator for GPS signal alignment, super-heterodyne test bench for digital phase noise detection, and TTL pin-diode switch drivers.• Helped design and develop a novel ultra-wideband receiver capable of capturing the entire HF band while maintaining more than 135dB of spurious-free dynamic range.• Contributed to development of an autonomous platform for testing U.S. submarine omnidirectional antennas.• Designed and developed database and recursive tracking algorithm for predicting inventory and projected cost of submarine antenna builds.• Occasional travel to host technical presentations for customers.

Dartmouth, Massachusetts, Us

Thesis: Microfluidic Sensor Capable of Detecting Fluid Temperature and Flow Rate SimultaneouslyAbstractThree different microfluidic sensors are fabricated from bulk Barium Strontium Titanate (BST) and are shown to be responsive to both fluid inlet temperature and flow rate. The sensors’ target application is in a high throughput and very accurate Point-of-Care (POC) platform.Simulation and empirical data give evidence that reducing the size of the sensors down to the thin-film scale may yield sensitivity higher than any other sensor found in current literature. A specialized test bench with the capability of full automation is constructed to provide the means of capturing enough data to make conclusive claims. Improvements in the sensor acquisition circuitry are discussed, as well as the inclusion of a Digital Lock-In Amplifier (DLA). Because a DLA is capable of measuring phase, the complex impedance of the sensor can be acquired. The reactance may be more responsive to flow rate, temperature, or even other physical properties not yet investigated.

Msee, Microelectronics And Solid State Devices

Bsee, Electrical Engineering