David K. Quinn, Jim Thorpe, PA, 321-634-2670 DavidKQuinn@aol.comEngineer: Electronic Hardware / Embedded Firmware / Lithium BMS / Power Supply / Expert Witness Introduction: Sr. Electronic Hardware Design Engineer w/ Embedded Microcontroller Firmware Capability. Design / verification abilities: Analog, Digital, Mixed-Signal, Audio, Wireless, ADC, DAC, FPGA. Battery Management Systems: LIon, LiFePO4, LTO, Lead Acid / Gel Cells. Sensors, Power Electronics, Power Supplies, DC / DC converters, Wiring-harness design. R&D / product development experience, component obsolescence remediation, DFMEA, hands-on engineering including: Aerospace, Military. Industrial, Commercial design, Design Validation / Verification, manufacturing, and documentation. Discrete logic family characteristics well understood (74TTL, 74LSTTL, CD4000, 74HC, 74AHC, LVDS, LVT, ECL, PECL, others), including voltage requirements, timing, thresholds, mixed signal applications, etc. Legacy logic support and can provide design modernization. Also offered: Simultaneous debug of Hardware and Embedded Firmware (Assembly / C) / BMC, W/applicable emulators. Support roles offered: Project Leader, Project Manager, Engineering / Production Liaison, Purchasing, Technical Support, and Component Engineering. Experience: Production support / debug, Sch entry, CAD, PCB, BOM generation, Test fixture design. Also offered: Expert Witness and Technical Writing skills. Familiar with RoHS (Restriction of Hazardous Substances) and military exemptions.

Experience and Knowledge: Hardware Design: Digital logic (including legacy 74XX logic), Analog, ADC, DAC, R.F., Mixed-Signal, Video, PLL, DLL, DPLL. Battery Management System Design: Lithium Ion, Lithium Iron Phosphate, Lithium Titanate, Lead-Acid, Nickel Metal Hydride. I/O: Discrete, I2C, SPI, TTL-serial, Analog, Digital, Scaling, Self-diagnostic W/safety margins, TVS and ESD protection. Programming: 25+ yrs C, C++, Assy; Cooperative Multitasking / Time Dispatch / State Machines / Scripting Languages / VHDL. Embedded Hardware and Firmware: (various platforms / uCs:) OS: RIOT (Mesh Networking) and Linux, BMC, low level device drivers. Safety: Vital related design: Creepage / clearance / grounding / Fail-Safe / leakage. ex: standards such as IEC 60950. Power Supply Design: (Single Phase / Three Phase), Inverter, Battery Backup, Charger. Switching Power Supply: design (DC to DC converters / Inverters): Typically, 80-90% efficient, Familiar: Mil-Std704 / Mil-Std1275D. Discrete / Semiconductor Design: Discrete component level, IGBTs, BJTs, MOSFETs, JFETs. Analog Design: Low Noise Analog, Op-Amps, Mixed Signal, Audio (including Class-D), ASIC and Power Supply, (including PCB layout). Digital Design: Logic families include 74HC, 74HCT, LVT, CD4000, LVC, LVX, TTL, LSTTL, ECL, LVECL. Output Loading, Input

Loading (capacitive), Logic voltage thresholds, Setup and hold timing employed in clocked systems, RAMs, D-Flip-Flops, registers, etc. High Power Peripheral Drivers: Solenoids, PLC, Brushless DC Motor drive, Flow Controllers, Flow Sensors, Pumps, Proportional Valves. Motor Control Servo-Loop applications: Actuators using Wheatstone Bridge, Load-Cells, Resolution tracking resolver to digital converter for

angular motor position tracking, Medical Pumps. PLC programing, control and interface (24VDC interface knowledge). Wiring Integrity: IPC 620 / EWIS (Electrical Wiring Interconnection System) / Wiring Harness / Cable Design / NASA 8739.4 Signal Integrity: Balanced / Differential Signaling, Impedance Matching, High Speed Digital Signaling, Terminations., additional. Programmable Logic: CPLDs, FPGAs and ASICs with on-board mixed signal. Communications: Bluetooth, SPI, I2C, RS-232, RS-422, RS-485, USB, LVDS, FSK, HART, Ethernet, CAN, SerDes, Infrared, ARINC. Microcontrollers: ARM, Microchip PIC, MSP430, 8051, 8052, Z80, 68xx, 68xxx, 6502, X86, 8748, 8749, TMS320; including emulators. Sensors: Mems, GPS, Current, PIR, Infrared, Thermal, Pressure, Altitude, Proximity, Wheatstone Bridge – Voltage (many I2C). Schematic Capture / CAD / PCB: Altium, Allegro, Mentor Graphics, PADs, Kicad, Orcad, Sunstone: (Analog, Digital, Strip-line). EMI / EMC compliance: RF: FCC Part-15 (A&B), Mil-Std-461, Miniature transmitter design, Microwave (during military). Telephony and Modem: FCC part-68 (POTS / DAA), TVS (ESD, Transient Voltage and Standard Lightning protection). Solar Power technology: Familiarity gained through research and strong interest. Component Engineering: Work closely with suppliers and manufacturers (CEMs / BOMs), qualify samples. Documentation: Expert Witness, Technical writing skills, Failure Analysis, BOMs, CAD, Production, Tech. Support and Purchasing. Laboratory Equipment: Familiar with standard equipment: Oscilloscopes, Meters, Spectrum Analyzers, Logic Analyzers, DVMs, etc. Military Document Guidelines: DO-254, DSCC-Military part numbers, Mil-Std 1547 (component derating) and MIL-STD-704E. RF Military: Microwave (5 Ghz), Tropospheric Scatter (2.4Ghz), Transmitters, Receivers, Telemetry equipment, filters, mixers, LNAs, PLLs. RF Commercial: FM/AM trans, FM Stereo, RF Design understanding, Oscrs, tuned wavelength antennas. Wireless Radio (ISM) Communications: Transmitter / Receiver Designs: 433Mhz – 915Mhz, up to 2.4Ghz. PWM LED Driver Design: VASI (Visual Approach Slope Indicator) using LEDs. MEMs devices: Accelerometers, Gyroscopes and Geomagnetic Sensors / SPI interface. Support Software: (Labview, Spice, Quartus, Pspice, Matlab, Simulink, LTSpice, MS Suite: (Word, Excel, Visio, Outlook, P-Point, Excel).

Experience: Private Contract, OEI - (May2016 – October2016, North East, MD) Sr. Design Engineer (Consultant)Analog / Digital Circuit Design, Firmware, SMBus, PCB/PWB, CAD were required on design of medical training equipment. I2C sensor boards were controlled via MSP430F5529 Microcontroller. I designed all slave circuits, wrote all embedded firmware (C). I2C slave devices include: LTC2473 (16 Bit ADC), PCA9501 I2C Expander, I2C Honeywell pressure sensors, LCD2004A I2C Display. PLC motor control for medical pump. Review and oversight of all system design decisions.

Consultant Textron Systems: (Jul2015 – Jan2016, Cockeysville, MD) Sr. Design Engineer (Consultant)Audio system control board design using (PIC Microcontroller), revised older design from CD4000 logic family. Diagnostics of military radio and audio sound system design remediation. 30 Mhz - 500 Mhz (SINCGARS). Produced customer presentations.

Resume of David K. Quinn Page 1 of 3 21Dec2016

David K. Quinn, Jim Thorpe, PA, 321-634-2670 DavidKQuinn@aol.comEngineer: Electronic Hardware / Embedded Firmware / Lithium BMS / Power Supply / Expert Witness

Recent Private Consulting: (Jan2014 – Jul2015, Off-Site) Sr. Design Engineer (Consultant)1. 433 Mhz ISM band wireless data transceiver design for remote sensing app. Lab design / testing Using RIOT OS. 2. LED control circuit / Lithium Ion battery charger design; emulator used: Code Composer, MSP430 USB-Debugger/FET. 3. Three channel Stepper Motor control / driver board design using MSP430 uC including schematic, PCB, firmware (C).4. Lithium Ion battery charge control circuit board design. This was an Embedded C Firmware C only design job used to interface a

SMBUS / I2C to a MSP430 subsystem / Code Composer, MSP430 USB-Debugger/FET.

Consultant Honeywell: (Sep2013 – Nov2013, Philadelphia, PA) Sr. Design Engineer (Consultant)6Ghz Micropower Impulse Radar design for a level sensing application. Additionally, performed electrical PWA environmental testing using Humiseal 1B73 Conformal Coating and Dymex 9102 sealant to provide ruggedization, able to withstand extreme humid conditions, while still functioning properly. Protocol: HART (Highway Addressable Remote Transducer) Protocol / Bell 202 FSK over a / 4-20mA current loop, Design verification.

Celestica Corp: (Oct2011-Dec2012, Manchester, NH) Sr. Design Engineer (Consultant)Consultant, Power Supply Design; (LiFePO4) Lithium Iron Phosphate fuel gauge design. Oversight and circuit design of switching power supply, including: PCB, documentation, logic revision, reliability, component derating, safety, production and EMI / EMC. Design responsibilities include LiFePO4 Battery Pack Fuel Gauge using bq78PL116 and bq3060, which also included small switching power supplies. Additionally: management of ~1KW power supply designs.

Microsun Technology: (Jun2011-Sep2011, Chicago, IL) Sr. Design Engineer (Consultant)Consultant, Military Product Design; Lithium Ion battery charger / balancing circuitry. Circuit Design, schematic entry (Eagle). PWB, PCB, CAD was performed. Reliability, component derating, safety, communication (I2C), and EMI were involved in this design. Core Components: CPU: MSP430F2131IPWR and GAS GAUGE: BQ20Z65-R1, Embedded C firmware.

ABB: (Jun2010 – Apr2011, Alamo, TN) Sr. Design Engineer (Consultant)Consultant, Product Design included data acquisition using current sensors, transmission of current readings to controller PWB for a Power Switching Control System. My responsibilities on this program included design of RS-485 differential transmission and fiber optic system, circuit design and PWB layout. This included review and oversight of all system design decisions, including cable design. Contained three phase current detection device. This included long term reliability, safety and EMI.

General Electric: (Mar2010 – Dec2010, Melbourne, FL) Sr. Design Engineer (Consultant)High level controller PWB for (Positive Train Control) Program. Responsibilities: analog and digital circuit redesign, including reliability, communications (RS-232), safety, EMI, I/O, discrete digital / analog design to production readiness. Legacy Digital discrete logic brought up to date, replacing obsolete components. Used LTSpice for circuit simulation. Legacy logic families supported and replaced, included TTL, LSTTL, CD4000, 74HC. PADs: schematic entry and PWB / PCB layout. CPU Technologies included 3 Freescale Coldfire and two 6805 for legacy product compatibility purposes. Design verification.

Yardney Technical Products Inc: (Jul2009 – Jan2010, Pawcatuck, CN) Sr. Design Engineer (Consultant)Lithion-Ion Battery M.S. - 28Volt MIL-STD-1275D Aerospace defense program. LION BMS Fuel Gauge design using optical switching to provide near zero discharge current, extending battery shelf life. Design based on TI MSP430 W/I2C. Wrote Embedded C firmware. Used LTSpice. Stress analysis to Mil-Std-1547 Component Derating Guidelines. Space design component selection.

Opto Technology, Inc: (Sep2008 – Mar2009, Off-Site) Sr. Design Engineer (Consultant)Microcontroller based High Powered LED Driver / Power Supply design using PIC2431 including Embedded C firmware. Intersema MS5541C uC Emulation sensor project was completed. Consulted with NASA on a Lithium Iron Phosphate project.

BAE Systems: Jun2007 – Sep2008 (Johnson City, NY) Sr. Design Engineer (Consultant)Battery Powered Hybrid Drive Program Design Support. Responsibilities: troubleshooting complex Analog and Digital circuit design interface controlled by a Freescale MPC5554 MPU. Designs included support of single phase and three phase power drivers and inverters. Battery management / Chargers / Power supplies. Responsible for revising designs and resolving production / logic design problems; DO-254 design verification. RS-232 and CAN Bus used. MATLAB used. Supported cable / harness design provided diagnostic support using Assembly language programming application.

SESI Inc: (Mar2007 – Jun2007, Columbia, MD) Sr. Design Engineer (Consultant)Short term assignment; Team leader for a small Microcontroller design project. Project based on TI MSP430 Microcontroller using SPI interface for new control board design. Hardware (Digital / Analog / Embedded C Firmware / BMC) designs implemented on this project, which was completed in ~9 weeks. Based on Ultraviolet Biological Trigger Lidar (UBTL).

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David K. Quinn, Jim Thorpe, PA, 321-634-2670 DavidKQuinn@aol.comEngineer: Electronic Hardware / Embedded Firmware / Lithium BMS / Power Supply / Expert Witness

Goodrich Corp: (Mar2006 – Mar2007, Cedar Knolls, NJ) Sr. Design Engineer (Contractor)Design Support, 787 aircraft braking system design team. Responsibilities: Implemented Load-Cell circuitry using AD7731 device. System integration, provide Load-Cell design, used SPI interface for DSP / Actuator Feedback. Supported 28Volt Power Supply (Compliant to MIL-STD-1275D), Mother Board. Production Liaison for P.S. modules. ARINC bus standards used for avionics equipment interface. Work compliant to EWIS (Enhanced Wiring Integrity System).

NASA subcontract: (Jan2006 - Feb2006, Off-site) Sr. Design Engineer (Contractor)NASA Lithium Ion Battery Charger Design Verification: Project involved the design confirmation / testing of a NASA related Lithium Ion Battery Charge subsystem. Verified abrupt charger disconnect, measured critical components compliant to specs. Numerous tests were performed: Including battery charge / discharge / cycles. Cell voltage matching.

General Dynamics: (Sep2005 – Jan2006, Cedar Knolls, NJ) Sr. Design Engineer (Contractor)Project Leader: Redesign / Product support of classified Mil. Spec. turret program on light armored vehicles. Nature of work was Microcontroller, DSP, and Power Supply controller. Also, lead team on debug effort of gyroscope problem.

Avanex: (Mar2005 – Jul2005, Painted Post, NY) Sr. Design Engineer (Contractor)Production Tester Design, Project Leader: ‘Supported design of a production tester from concept to completion. CPUs: Microchip PIC18F8722 / USB 2.0 Co-Processor: Microchip PIC18F2455. Circuit types employed: 50W Adj. National Semi LM3485 based Switching Power Supply controlled by I2C from CPU interface, USB 2.0 Compliant Port, Two High-speed (230K) RS-232 ports. I/O protected by TVS devices, Embedded C Firmware for PWB DFT / BMC, debug and diagnostics. Technologies Employed: High Speed CMOS Logic, Analog, Mixed-signal & Switching Power Supply. Schematic Entry: Orcad 10.3 / CAD / PCB: Pads. Spice: LTspice. Separate FPGA / VHDL project, used Quartus. Supportive role - cable / harness spec. Project completed Jul2005.

Conexant: (Jan2005 – Mar2005, Red Bank, NJ) Sr. Design Engineer Contractor)Power Supply Design / Mixed signal, Schematic Entry, Component Selection: This was a short term (9 week) contract job requiring Schematic entry using Orcad. Also responsible for power supply and mixed signal design, including general component selection. Technologies Employed: High Speed discrete CMOS Logic, Analog, Mixed-Signal, Lead-Acid charger & Switching Power Supply. Schematic Entry: Orcad 10.2.

The following employment records are from various contract and full-time positions held from 1995 through 2005:

General Dynamics - Redesign of Military Transmitter / Audio Unit: R.F. Control, TVS protected I/O. Corrected noise pick-up issues. Quinn Embedded Design: Custom Design of Infrared Detector, 2004.Custom Design of Flow Control Gas Mixing Unit: Microprocessor Design of Flow Control / Flow Sensing. Closed Loop Control of gas regulation, Mixing system, Pressure sensors, Pressure controllers, Proportional Valves, DC Motors.Unitec Electronics Inc - Custom Circuitry Design: Designed circuitry used to control bill acceptors and coin hoppers. Microcontroller, Analog, Digital, Mixed Signal, Power Supply, Inverters, Lead-Acid Battery Charger. Schematic Capture (Orcad), Laboratory testing, Documentation including, BOMs, schematics, and wiring harness diagrams. Component qualification, component documentation for Engineering and Production. Also wrote Embedded C Firmware for PWB DFT, debug and diagnostics.Mars Electronics International: Circuit Design / Component Engineering, Schematic capture: Mentor Graphics. Responsibilities: Power supply, Motor control, Infrared sensing circuitry design. Worked closely with purchasing and outside manufacturer's representatives in order to qualify and acquire components in time for projects. Design of bill acceptor circuitry, based on 8051 CPU and T.I. TMS320 DSP. PLC support / Ladder logic.Analog Devices Inc: Modem design: Based on the AD1803 / AD1804 chipset operating via AC-97. Supported customer’s designs with audio CODECs that operated under the AC-97 standard and supported features such as SPDIF and TOSLINK. Infrared of New Jersey Inc - Sr. Design Engineer / Manager: Electronic Design; Hardware and Firmware designed for infrared sensors and communications adaptors. Used: SPI, High speed A-D conversion, RS-485 networking, Infrared networking, high gain low drift amplifier techniques used for low level infrared sensing. Employed Medium density FPGAs / VHDL in designs. PADs Power Logic used for Schematic entry. Oversaw PCB layout (for low noise and safety compliance). Wrote Embedded Firmware "C", debugged with Microchip PICs, MPLab and Ice-2000 emulator. Helped in implementation of ISO-9001. Hardware revised from older legacy logic.U.S. Robotics / 3Com Inc - Sr. Design Engineer: Designed Analog (56K / V.90) and ISDN (fractional T1) RS-232 Modems. Supervised Off-Site Compliance and Certification testing of Modems: Verified products’ compliance and safety certifications to UL 1950, TUV EN60950 / IEC950, FCC part-15 and FCC part-68. Designed ISDN Modem with ringing SLIC. Cardinal Technologies Inc - Sr. Design Engineer: Sr. Design Engineer, Hardware design of (33K/V.34) Analog Modems. Boca Research Inc - Sr. Design Engineer: U.S. and International POTs 33K / V.34 Modem Design. Products met FCC Part 15-B & 68. Modem DAAs contained TVSs, ESD and lighting protection. Wrote Embedded Firmware "C" on several uC platforms.

Military: Air Force: Staff Sergeant, specialized in electronics, digital logic, analog, maintenance and repair of R.F. equipment including: Tropospheric Scatter and Microwave Transmitters and Receivers, power supplies and associated telemetry equipment. Held a Secret Security Clearance, and Honorably discharged in 1975.

Education: Nova University – (BSEE) Electronics Engineering / Computer Programming. Keesler Tech. - Military degree (Assc.) Advanced Electronics. St Andrews High School, Charleston, SC – Graduated.

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