Dan W. Profile

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$50 USD / hour

reno,

united states

$50 USD / hour

It's currently 12:29 AM here

Joined March 13, 2012

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Dan W.

@Dogbert256

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(0 reviews)

0.0

$50 USD / hour

reno,

united states

$50 USD / hour

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Electrical Engineer

Elite, motivated Electrical Engineer with a very broad range of education and experience in the field of electronics. Design of virtually any type of analog and/or digital circuitry, including processor based designs, high accuracy data acquisition, and instrumentation and control electronics. Specifications development, component selection, BOM, documentation, and technical writing. Schematic capture, PCB layout, and rapid prototyping. PCB fabrication using Advanced Circuits, Inc. ([login to view URL]). SMT soldering and assembly. Small production runs courtesy of Vital Systems, Inc. ([login to view URL]). Embedded programming in Assembler and C. High level programming and data analysis using Matlab. Long term project support available. Specializing in designs to meet harsh industrial environmental requirements, manufacturability and testability targets, with the goal of high reliability and reasonable cost. Summary of Services Processor based embedded systems design and development; Analog and digital electronics design; Power supply circuit design; CMOS digital integrated circuit design; Professional PCB layout and fabrication; Firmware development (Assembler and C); High level programming (Matlab and other languages); Relevant Experience and Research Areas Applied Numerical Methods; System Identification; Embedded Microcontroller Systems; Digital Signal Processing; Fault Tolerant Design; CMOS Digital IC Design; Adaptive Control; Neural Networks; Summary of Qualifications BSEE, MEEE, University of Idaho; Post graduate GPA = 3.96 / 4.00; Registered EIT in Idaho and California; Additional Information Member US Chess Federation (highest rating = Expert). Previous member of Boise Chess Club; winner 1992, 1994, 1995 Boise Chess Club Championship; winner 1991, 1994 Boise Open Chess Tournament.

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Portfolio

Design, PCB layout, and fabrication of a high efficiency H-Bridge used in a thermoelectric heater/cooler application.

H-Bridge was capable of operating at thermoelectric loads up to 50 VDC at 3 Amps (150 watts), with total device power dissipation of approximately 1/3 watt (99.7% operating efficiency at this load). Design used NMOS power transistors for both the high and low side of the H-Bridge.

PCB layout was 6 layers with dimensions 2.55" x .85". 100 H-Bridges were manufactured and epoxy potted into 2.69" x 1" x .725" potting shells, with a 12 pin SIP lead electrical interface.

Electronics design detected every possible overcurrent condition, and also monitored device temperature. Upon detection of a fault (overcurrent and/or overtemperature), the H-Bridge would automatically shut down and signal an error condition to an embedded processor. The H-Bridge could be restarted, but only upon removal of the fault condition.

H-Bridge (System Diagram and PCB Layout)

Electronics design, PCB layout, and fabrication of a single board computer based on Freescale MCF5232 ColdFire embedded processor, including custom 2 MHz PWM buck regulator, high quality NOR Flash memory, SRAM, peripherals including UART, SPI, GPIO, and eTPU.

Component footprints were chosen to be QFP and PLCC instead of BGA because at the time Freescale Semiconductor had a patent dispute with Tessera Technologies and their uBGA package processors were not available.

Layers: 8
Dimensions: 3" x 2"

Single Board Computer (Front and Back View)

Electronics design, PCB layout, and fabrication of a Pulse-Flow Meter. Instrument uses an array of sensors to measure water flow rate and direction within Florida groundwater wells in real time.

Dozens of these specialized scientific instruments have been fabricated for Rapid Creek Research by Zero Defects, Inc. in Boise, Idaho.

Web site: http://rcresearch.com/L31N_GW/index.php

(Photos courtesy of Rapid Creek Research)

Pulse-Flow Meter (Internal and External View)

H-Bridge (System Diagram and PCB Layout)

Single Board Computer (Front and Back View)

Pulse-Flow Meter (Internal and External View)

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Experience

Electron Volt Research and Development (Sole Proprietorship)

Feb 2012 - May 2012 (3 months, 1 day)

550 W. Plumb Ln, Ste B #254, Reno, NV 89509. Primarily involved in electronics design, component selection, PSPICE analysis, schematics, BOM, PCB layout, documentation, purchasing, fabrication, and test/validation of electronic products for clients. Specializing in designs to meet harsh industrial environmental requirements, manufacturability and testability targets, with the goal of high reliability and reasonable cost.

Sustainable Energy Solutions

Oct 2010 - Jan 2012 (1 year, 3 months)

620 S. 18th Street, Sparks, NV 89431. Embedded electronics development for a local renewable energy start-up company, including specifications development, electronics design, component selection, PSPICE analysis, signal integrity, schematics, BOM, PCB layout, documentation, purchasing, fabrication, test/validation, and firmware development.