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Russ Crowther | Elance
 
176985602337900
Last Sign-in: Apr 16, 2014

Russ Crowther

Russ Crowther BSEE/CS
   United States
San Jose
  |  5:28 pm Local Time

Overview

Embedded System design and development including analog and digital hardware and firmware for 8051, 80251 and PIC microcontrollers. Also power electronics and motors.

Design reviews and troubleshooting, too.

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Sep 4, 2013|Other - Engineering & Manufacturing|$2,660|Working
Sep 4, 2013|Other - Engineering & Manufacturing|$1,179|Working
Jun 13, 2013|Electrical|$1,483|Working
Apr 14, 2013|Electrical|$110|Completed
|
5.0

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Skills (4)

Tested
Embedded Systems
Analog Electronics
Electronic Design
PCB Design
PCB Design Test
My Score
avg

Service Description

Design and development of embedded systems involving USB interfaces, data logging measurement systems, test systems and power electronics. Using test equipment, analog, digital, power ICs, CPLDs, C, Microsoft Visual Studio, Visual BASIC6/C++, MFC, LabWindows/CVI, Microchip MPLAB MCC18, MPASM and Kiel 80251 assembler. Hitex DProbe and MPLAB ICD2 debuggers. OrCAD and PADS PowerLogic schematic capture. PowerPCB printed circuit layout. OrCAD PSpice and MATLAB.

Past Projects:

Major hardware and firmware development for a meteorological data logger. Designed an analog measurement subsystem that achieved 0.025% accuracy for 5.000V and 50.00mV measurement ranges, over the full -40 to +55°C temperature range. Updated 8051 firmware to utilize my new hardware with an 80251 processor and new capabilities enabled by a 256 macrocell CPLD and flash memory. Designed a power supply using multiple switchers to improve battery life.

Two different USB projects using the Communications Device Class to emulate a COM port. One with the PIC18F4550 and the other with a PIC18F2450. Wrote two Visual C++ MFC applications for one of them that detected device insertion and displayed a dialog to work with the device.

Designed and implemented 75% of two test systems for multiple MPEG2 Satellite Decoder products in a team environment. Integrated the test systems at the contract manufacturing plant. Developed software using LabWindows/CVI, and implemented test instrument drivers....

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Education

University of California at Davis
BSEE with Computer Science
-

Keywords

Hardware
Firmware
Analog
PIC
8051
My Snapshot
Elance Level
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  • 12 months
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Identity
Username
RussCrowther
Type
Individual
Member Since
September 2009
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Russ Crowther | Elance

Russ Crowther