Electrical Engineer Design

Leonardo H. Lee

Address: ***** ****** ***** *****, *******, Texas 77071 Cell: 713-***-**** E-mail: ********@*******.***

OBJECTIVE

To apply extensive experience Electrical Engineer position. Utilize strong technical, troubleshooting, hands-on, repairing, team/project management, organizational, communication, and interpersonal relation skills, in a challenging, creative and stable environment.

WORK EXPERIENCE

Hardware Engineer, Internash Global Services, LLC. Houston, TX March 2017- Present

Perform Failure Analysis on Dell mobile device batteries, determined defective components and root cause. Managed a technical team for failure analysis processing to completed more than RMA 500 units from ODM of Dell and HP per month

Test BMU of Dell and HP portable device batteries with programmed Texas Instrument EV2300 over SMBus protocol and circuit analysis

Designed and build automatic test bundles and fixtures

PCB circuit analysis and created debugging procedures to find out failure components

Apple J30, J31, J90, D1 D2 and DELL E7 E8 Motherboards debugging, troubleshooting and failure analysis include subsystem, USB bus, Ethernet system, PCIE, power systems of CPU, RMA, Southbridge, etc.

Troubleshoot and repair production line equipment promptly to minimize production line down time for smooth operation

Equipment calibration and preventive maintenance and maintained all the corresponding documentations

Created and improved three manufacturing processes, flowcharts, two procedures and two corresponding documentations

Developing and improving manufacturing software to improve throughput by 5% and yield by 8%

Provided weekly report, conference call, technical presentation, problems solving and application supported to customer

Project/Team management, onsite trouble troubleshooting

Product Technician, HTC America Inc., Houston, TX May 2008 - May 2010

Repaired and Tested more than 30 product units with less than 5% failure rate per day

Motherboard/sub-board testing and repair

RESEARCH AND DESIGN PROJECTS

Battery Charging/Discharging System (Nov 2017 - Present) Designing TI MSP430 controlled device can automatically charge/discharge Dell batteries by reading relative state of charge and other design specs info from Battery Gas Gauge IC over SMBus protocol. Device automatically switch to charging mod and generate corresponded charging voltage send charging command into Gauge IC if RSOC under 20%, stop charging until RSOC met 25%. Device automatically switch to discharging mod, MCU controls active load transistors to maintain discharging current at 0.5C, stop discharging until RSOC met 28%

BMU Power Consumption Automatic Testing Bundle (May 2017) Designed and builded ARM FPGA based device can automatically read blocks from certain address of BMU of Dell batteries over SMBus protocol to define and generate corresponding voltage to test power consumption of each terminals of BMU. Automatically send SMBus commands into Battery Gas Gauge IC to open/close charging/discharging MOSFET and sleeping mode (under low clock rate) to measure power consumption at each mode. Collect measured data and store data into computer over RS-232 protocol for further battery failure analysis purpose

Conway’s Game of Life (Fall 2016) Using 2 or more buttons on the FPGA board, in order to seed the game with a value read from ROM, this will start to display pixels in a certain pattern on the LCD screen based on the initial seed. Then the pixels will evolve into different shapes based on the rules of the game. RAM was utilized because information about each pixel will have to be stored

Encrypted ID Verification System (Fall 2016) Design a secure FPGA-based password verification system with token and acknowledge that could apply to either ID verification or encrypted hardware communication

Electric Guitar Amplifier (Spring 2016): Designed and builded a prototype small signal linear amplifier system on PCB boards with OPA and BJT with power supply system. Simulation schematic in NI Multisim. Soldering all components on PCB boards and assembly into metal plate chassis. The power supply system takes 110VAC power from wall outlet to support 15VDC (15watts) and 35VDC (100watts) to preamp system and 2nd stage high-power amplifier system. Receives 0.1mWatt signal which frequency range at 5Hz - 20 kHz from electric guitar and output 100 watts signal drives 4x12 speaker cabinet with overdrive, equalizer and loopback functions

8 bit Memory Circuit (Fall 2015): Designed and builded a prototype transistors level memory circuit with 8 bit capacity able to read/write by 4 bit addressing via MOSFETs

Image Processing Tool-MatLab Programming (Fall 2013): designed and written MatLab image processing code prompted the user to edit the image

Sum-Bot Test Plan (Fall 2013): NI LabVIEW programming for robot with color sensors and ultrasonic sensors, let the self-searching objectives in a color marked area and push these objectives out of this area

SKILLS

Signal processing filter design, Small/Large Signal amplifier design, BiCMOS applications. Automatic Control system design, EM Waveguide design, Three Phase complex power Design, Circuit board soldering, PCB fabrication, Circuit system or electrical device Simulation via NI Multisim, NI DAQ, Microcontroller Programming, Altera / Actel FPGA Verilog HDL and digital logic design, SMB, I2C, RS-232

Application of Multimeter and Oscilloscope to diagnose and analysis circuit, Application of curve tracer to analysis transistors obtain input current-voltage characteristics

Programming Languages: C/C++, Assembly Language, MatLab coding, Image Processing via MatLab

PCB tools: NI Ultiboard, AutoTRAX, Altium circuit studio

Application Software: Cadence Virtuoso, Allegro, NI Multisim, Altera Modelsim, MatLab, NI LabVIEW, LTspice, MS Visual Studio, MS Office,

Setup WAN, LAN, VLAN, WLAN, VPN, VoIP, TCP/IP model, IP subnet mask addressing for Cisco devices

Fluent Chinese Mandarin

EDUCATION

Bachelor of Science, Electrical Engineering

University of Houston, Houston TX Aug 2013 – May 2017

Relevant Courses: EE Capstone Senior Design II, Power Electronics, Analog CMOS Electronics, VLSI Design, Advanced Digital Logic Design, Physical Principles of Solid State Devices, State-Space Control Systems, Automatic Control Systems, Microcontroller, Analog Electronics, Digital Electronics, Electronics, Digital Logic Design, Intro to three-phase complex power, Programming Applications in Electrical & Computer Engineering, Applied EM Waves, Signal & System Analysis etc.

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