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will help you find quick solutions to electronic design problems.

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Last Updated:   Saturday, August 23, 2008 04:27 PM

Featured Circuit of the Week

Poor Man's Timer
Often during testing of certain equipment and components, you would like to keep track of the elapsed time in hours, minutes and seconds. There are some nice commercial digital timers and counters available for just this sort of application.  However, although it may not be as accurate, there is a cheaper way to go.  I’m sure many of you have some old wrist watches or battery powered dial faced alarm clocks collecting dust in some drawer. 

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Hot Links to Check Out!

Counterfeit Products more than a Nuisance!
Hobby Corner  has hobby circuits -- check it out. 
Electronics Resources  includes links to components,  manufactures, distributors, journals, newsgroups, and much, much more
Circuit Solutions Dave Johnson shares solutions to tricky electronic design problems. 
Discovered New Products List accumulated by Dave of new electronic components and products. 
Dave's Circuits Special section with circuits designed by David A. Johnson, P.E.
Component Resource Section is a directory of electronic component manufactures, useful links, and much more

Featured Circuit Last Week

Poor Man’s Digital Counter Using
Commercial Pedometer
  NEW
There are many occasions when you may want to count something electronically.  Perhaps it is car traffic on a street or items moving down an assembly line.  It might be the number of times a machine is activated or maybe you want to count the number of people entering doorway.  Commercial counting modules do exist but if you want to use something cheaper, you can modify a pedometer to do much the same thing....

All Circuits of the Week

 
 Dave is available for consulting projects - give him a call
Suggested Tool Kit List for Electronics work bench
Discover Circuits' Book Corner   collections of books to buy -- including circuit collections,  circuit design, electro-optics and much more

 Dave's other websites to visit: 

Imagineeringezine - recource materials for inventors, hobbyists, scientists & engineers

Discover Solar Energy - Portal for Renewable Energy Resources

Consulting Engineering Services from conception to production

collection of resources for inventors,
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resource portal for information
regarding renewable, alternative
or sustainable energy
Dave Johnson & Associates -
consulting services  for new products from conception to production or improving the
cost & performance of
existing products

David A. Johnson, P.E. is an electronics engineer with over 30 years practical experience in the areas of analog & digital design, fiber optics and RFID.  Electronics is his vocation, hobby and passion.  He is a published author with articles and designs in EDN, Electric Design, Midnight Engineering and Popular Electronics.   Throughout his career, Dave's imaginative approach to design has resulted in applying new technologies in creative and cost saving ways. 

October 23, 2003
Remembering Bob the Beagle
Beagle Photo Album,
featuring Betty Sue & Billy Bob



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