Resume of David A.
David A. Johnson, PE -
6601 County Road 6410 Lubbock, TX 79416-9717
806-368-7747 (as of June 2011) Central Time Zone
- 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 250+ page e-zine of useful information on general science, technology,
creativity, science experiments, inventing and electro optics.
- 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 battery.
- 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 existing products.
- 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 Trident missile.
- 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