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Contact Info:
Tell Engineering
2840 Woodcrest Dr.
St. Paul MN
55112
____________________
Text only: 763-226-6531
Email: Larry@tellengineering.com
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Profile
Overview: Retired
Senior Software and Electronic engineer with extensive
management experience. Hands on design and management
experience in electronics, PCB Layout, data acquisition,
embedded real time software, firmware, drivers and
electronics. Experienced in applications including aerospace,
video, switchgear, and rotating machines.
Certifications:|
National
Instruments Certified Software Developer, LabWindows\CVI
(September 2007)
National Instruments Certified Professional Instructor, LabWindows\CVI (October 2007)
Computer
competencies: C,
C++, VxWorks, National Instruments Labwindows/CVI,
National Instruments Lookout, Embedded processor C++, C and
assembly language, ODBII, Rolling Codes, Manchester encoding,
DeviceNet (CAN Bus), LabView,
Visual Basic, Visual C++, MS Office, Basic, DOS.
Education:
BSEE
University of Minnesota, 1969
Several classes, seminars etc. including a recent U of M class
on micromachines
Patents:
Two patents for transfer switches and bypass switches, patent
for encoding data in video content, patent for Ice Thickness
measurement instrument.
Experience:
Consultant,
Sept 1998 to Present
Current projects and Activities
Pellet grill control with 7 in color LCD and
PID control of grill temperature.
Atmel SAM
(ARM core) processor
Completed
projects (partial list)
Environmental sensor module
(PIC16F18345).
Production line glue control (PIC32MX795)
Convert medical product to PIC32MZ from PIC32MX
M2M solution for large industrial machine (PIC32,
Janus-Telit modem, Sprint M2M
service)
Emergency Warning Siren control
ODBII
& RTCC additions to Vehicle Monitor
Wireless
Interpreter, PIC32 with Bluetooth and cell phone
Modbus TCP Product development
Toxic gas monitor, PIC18F, 4-20 mA & USB, I2C to
peripherals.
Support and maintain and upgrade Spindle (machine tool) error
motion analysis software in Labwindows
CVI. Product includes extensive use of IEEE 1451.4 TEDS.
Ice Thickness instrument based on PIC18F with USB to PC
program to collect and report data.
Marine engine test monitor software.
Added Cellular modem and Smart Card Reader to a medical
product for a local firm. Wrote all using Microchip PIC
processors (completed December 2005).
Software to Measure and Analyze large electric motor Torque
and related performance during design and production test.
Additions to Firmware for Heavy Equipment joystick controller
using Atmel processors (completed April 2005).
Firmware for companion product to Ammonia Leak Detector
(Microchip Processor).
Development of several software packages for precision
machining analysis for High Precision Machining company.
Software for Large Electric Generator monitoring equipment
(Lookout and LabWindows CVI).
Hardware design and firmware design and code for industrial
ammonia leak detector with digital display and 4-20 mA outputs
using Atmel microporcessor (Atmel
processor).
Hardware design and firmware design and code for DeviceNet
temperature sensor (Microchip processor).
Wrote all software (C and C++) for two instruments for machine
tool monitoring, utilizing an Intel StrongARM
embedded processor running Wind River VxWorks and Zinc for
VxWorks GUI developer.
First product was awarded “Best of Sensors Expo” award at Fall
2001 Sensors Expo.
Added international support to machine tool instrument GUI,
including support for Asian languages.
Upgraded instrument test software in Labwindows
CVI for military equipment manufacturer.
Designed a Generator Test Panel and wrote test software for a
generator manufacturer.
Wrote several instrument test programs in Labwindows
CVI for avionics instrument manufacturer.
Upgraded video monitor controller to use Flash memory
microcontroller. Two projects for different monitor models.
Developed computer program in Labwindows/CVI
(ANSI C) to monitor machine tools. Acquire 5 position signals,
12 temperatures and one encoder or index pulse. Data presented
in real time in several graphical and digital formats as
selected by the user. Analyses include FFTs, least squares
fits and synchronous calculations defined in machine tool
standards. This project includes 15000 lines of C code and an
eight chapter, 98 page manual included in the program as a
windows help file.
Dotronix,1998
to 1999
SR.
Project Engineer
Designed embedded processors into industrial video monitors.
Processors respond to Infrared remote controls and adjust
monitor performance. Three models completed in 14 months.
First model in production since July 1998. Second entered
production in April 1999. This model includes A/D to measure
the beam current in the picture tube, D/A to control 14
functions, Real time clock with battery backup, Temperature
measurement chip, and serial EEPROM with on- screen display of
all parameters, menus etc. All peripheral chips connected by
I2C (high speed serial protocol).
Central
Engineering Company,
1983
to 1998
Sr.
V.P. Engineering, 1986 to 1998
Responsible for all engineering departments (approximately 50
engineers) including Electrical, Mechanical, Computer, and
Architectural. During last 15 months, added responsibility for
Project Management department (four people). For several weeks
chaired management team during medical absence of company
president. Member of advisory board. Member of several
negotiating teams. Lead negotiating team on key 6
million dollar project during president's absence.
Lead and managed design of several new test cells and test
cell refurbishments including:
New B777 and growth engine test bed for Rolls Royce, currently
largest test cell in the world. This cell includes capability
for operating the engine in full reverse.
New B777 test cell for GE (GEAES), similar in size to RR test
bed.
Modified test cell for United Air Lines to allow testing of
B777 engines.
Lead and/or managed several new product developments
including:
Vibration monitoring instrument based on DSP.
VXI Tachometer instrument
Family of new thrust stands.
Conversion of computer data acquisition system to Unix.
Conversion of computer data acquisition system to X-terminals.
Conversion of computer data acquisition system to VXI
Developed airflow prediction and modeling, and measurement
techniques including complex program with full documentation
with references to basic physics, equation derivation, and
dimensional analysis of all equations.
Developed program to analyze torsional vibration of gearbox
test stand.
Onan
corp.,
(now Cummins Power Generation)1968
to 1983
Manager
of Component Design
Managed three design groups for Generators, Switchgear, and
Controls.
Electrical
Design Engineer
Lead several design projects including:
Development of new Switchgear and controls for large
generating systems of multiple diesel driven generators.
Development of several voltage regulator/excitation systems
for generators.
Development of family of transfer switches.
Development of microcomputer based
transfer switch control.
Updated
March 19, 2025
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