Credentials & Capabilities of
Dave Johnson, P.E.
Last Updated on:
Saturday, October 04, 2008 03:15:02 AM
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SUMMARY OF MANAGERIAL QUALIFICATIONS: 30+ years of project management experience, leading by example.
Extensive experience in managing & supervising engineers,
technicians, CAD operators, assembly workers and subcontractors.
Has been responsible for generating product
definitions and specifications; estimating project
cost and managing project budget.
|SUMMARY OF TECHNICAL QUALIFICATIONS: 30+ years of electronic circuit design and new product development.
Areas of expertise include analog circuit design, electro optics, optical
communications, optical sensors, switch mode and linear power supplies, amplifiers,
instrumentation sensors, signal generators, signal processors and control systems. Have personally designed, built and tested thousands of circuits.
Professional Engineer, #174-25, 1980
Holds eight patents with
one more patents pending.
University of Idaho, Bachelor of Science Degree,
Chief designer of a new RFID card reader that cost
about one half the reader it replaced. Developed
a very low power radio frequency identification (RFID) card reading
system. The system was used as a replacement to hotel room door lock
Received US patent #6,476,708.
- Helped develop a wireless method to monitor the air pressure and
temperature inside an automobile tire. The system used a custom radio
frequency identification (RFID) circuit. A special antenna allowed an
external magnetic excitation field to power the RFID circuit and retrieve
the tire data.
Received US patent #7,019,711 and one Brazilian
Helped develop a complete video interactive
archery/firearm shooting range system. System projected moving targets
onto a fabric screen using a computer, laser disk player and video
projector. Reflector tipped arrows and an infrared CCD camera determined
where the arrows hit the target. Also developed a similar shooting range
system that used infrared laser equipped pistols, rifles and shotguns.
Systems launched laser light pulses at screen targets instead of arrows.
500+ installations now installed and operating. Wrote detailed
descriptions for a patent application on the techniques used.
US patent #5,566,951.
Conducted research and designed circuits to detect,
count and size air bubbles in blood using ultrasound techniques. Bubbles
with volumes less than 1 nanoliter were detectable. Circuit used in a
kidney dialysis machine. Designed and built a portable battery powered
bubble monitor used by the company's sales force to show potential buyers
the bubble-free nature of the disposable dialysis machine tubing sets.
Wrote circuit descriptions for a patent application on the bubble detector
US patent #5,394,732, Japan patent #2823513
and European patent..
Developed a product that monitored the resistance of a
domestic earth ground connection. The circuit also measured the earth
ground current and the voltage with respect to the power line neutral
wire. System was used in conjunction with a transient voltage suppression
Developed a system to monitor the concentration of a
soap/water mixture used in carwash soap dispensing systems. The method
used an optical technique to maintain the desired soap concentration.
Wrote a description of the electronic circuit used in the monitor. Over
3,000 systems were installed. One patent pending.
- Published many articles and circuits in EDN, Electronic Design, Popular Electronics and
Midnight Engineering magazines. Produced an extensive 10MB Internet web site that promotes
consulting engineering services. The site also has a
350+ page e-zine of useful
information on general science, technology, creativity, science experiments, inventing and
- Developed several families of touch activated AC and DC electronic switches. Switches
were mostly used to control lights, doors and intercoms in jail cells. Switches had to
survive severe abuse without requiring replacement. Designed and developed a complete jail
door control and monitoring system for Colorado Arapahoe County jail as well as several
other jails in Texas, Florida, New York and California. Sent the line of products through
CSA, CKC and UL safety testing programs. Developed another line of very low power DC
capacitance proximity switches. One switch operates up to 5 years on a single 1.5v button
- Designed, built and successfully demonstrated an optical through the air communications
link with a range of 6 miles. Also demonstrated the feasibility of using clouds as large
light pulse reflectors. In addition, conducted tests on atmospheric attenuation of light
pulses under various weather conditions. Proposed methods for a 40 mile telemetry link
using a xenon flash light source. Proposed uses for nitrogen spark light sources. Uses
included optical radar and long range distance measurements. Proposed a wide area optical
information broadcasting system that would cover an entire metropolitan area with high
speed data services.
- Designed and developed several new consumer products, including cordless telephones,
combustible gas detectors, smoke detectors, backup alarms, anti-carjacking alarms, coin
operated panorama telescopes and motion intrusion alarms. The motion alarm worked on the
basis of monitoring the disturbance of the earth's natural electric field. Wrote patent
papers on the intrusion alarm system.
- Solved a large number of engineering, industrial and medical instrumentation problems
for a variety of companies. Designed and built many custom test stations and fixtures.
Advised many companies on ways to reduce manufacturing cost and improve quality.
Led brainstorm sessions to produce new product ideas and new applications for
- Constructed many special test stations and special instruments for explosive devices,
including initiator testers for Ford and GM airbags. Designed and constructed explosive
flash detector/timer monitors. Monitors measured and tested the delay between primer
impact and actual explosion. Designed and constructed a laser welder process controller.
Controller used an optical fiber probe to monitor and count laser light flashes during
welding. Designed a computer controlled test station to test components used on the
- Evaluated a special color NTSC video enhancement circuit for use in consumer TVs for a
large cable company. Designed and built a prototype circuit to test picture improvements.
Wrote detailed report of findings. Also designed and built several custom video signal
test generators that were used in medial camera applications.
David A. Johnson, P.E. is consulting electronics engineer with
a broad spectrum of experience that includes product research, design and development;
electronic circuit design; design, building and testing prototypes; electro-optics; and
custom test instruments. Doing business for more than 30 years as David Johnson &
Associates, Dave has established himself as an electronics engineer who can provide a
variety of services. His proficiency is based on "hands-on" experience in
general engineering, electronics and electro-optics.
|Mr. Johnson is licensed by the State of
Colorado as a Professional Engineer; he is a graduate of University of Idaho and is a
member of IEEE. Holds six patents and has four more pending.
He remains well-informed of
the latest scientific and engineering advancements through independent studies. Dave is a
published author with articles and designs in EDN, Electric Design, Midnight
Engineering and Popular Electronics.