2014 Media Kit

DiscoverCircuits.com, has  40,000+ electronic circuits or schematics carefully cross-referenced
into 500+categories.   As a vital resource for engineers, hobbyists, inventors & consultants,
the site's collection of information offers quick solutions to electronic design problems.

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History of Discovercircuits.com

David A. Johnson, P.E. has always been passionate about electronics.  In 1998 he created a web site ImaginneringEzine.com promoting creativity and imagineering.  The site started with information of interest to Dave and other hobbysists, scientists and engineers.  It now with over 1000 pages which include:  sections covering creativity, inventing, electronics, the consulting professions, science and technology and much more.
On April 24, 2002 he lauched DiscoverCircuits.com.  He felt that the time was right to develop a "on-stop" resource for all things relating to circuit design.  His goal was to link to as many specific circuits and resources on the Internet as possible.      
In the early months, the site featured circuits designed by Dave.  By May 19, 2002 the site linked to more than 2500 carefully categorized circuits.
We have continually surfed the Internet searching for viable links to specific electronic circuits, schematics, designs or diagrams. - Below is an accounting of the growth of links on DiscoverCircuits:
  • May 22, 2002 - now has more than 4,500 carefully categorized circuits.
  • June 18, 2002 - now has more than 6,000 carefully categorized circuits.
  • Apr 26, 2003 - now has more than 7,000 carefully categorized circuits.
  • Jan. 9, 2005 - - added 600 more circuit links, now have 8,550+ circuits.
  • Apr. 18, 2005 - added 2000 more new circuits. Now we have 11,000+ circuits.
  • Oct 23, 2005 - added another 600 links.  Now linking to 12, 000+ circuits.
  • Jan 23, 2006 - past the 13, 000 number.
  • Feb 12, 2006 - have reached over 17,000+ circuits.
  • Apr 18, 2006 - have a whopping 20,000+ circuits.
  • June 17, 2006 - have a resource with more than 23,000 circuits.
  • Aug 13, 2006 - Added another 2000 circuits links.  Now have 22,000+ links.
  • Sept 15, 2006 - Added another 2400 circuits links.  Now have 24,000+ links.
  • Oct 26, 2006 - Added another 1500 circuits.  Now have over 25,000+ circuits.
  • June 2007 - Found more circuits to add.  The count is over 25,550 circuits
  • October 2007 - Even more circuits added. Now over 26,000 circuits.


 Always looking for more circuits & material to add to the site.

In an effort to provide useful information, new sections were added regularly.  Below is a list of those new sections:
  • Dec. 9, 2004 - Discovered New Products - This new section highlights some components or products that have attracted Dave's attention. 
  • Nov. 26, 2004 - Circuit Solutions - This new section highlights a particular circuit which has solved some sticky technical problem.  Initially the circuits will come from Dave Johnson but we will post circuits from others as well.  In the section you will also find a long list of solutions on which I am currently working.  We invite you to send in your own list of problems that are in need of solutions as well any solutions of your own.

  • Nov. 20, 2004 - Key Electronic Component Manufacturers  This new section is a directory of manufacturers categorized by some key electronic components.  In time we hope to have tens of thousands of companies listed, divided into several hundred categories.

  • May 1, 2005 - Check out "The Circuit of the Week"  Each week, a circuit is highlighted on the Home Page. - This link is a collection of all the Circuits of the Week.
  • Feb 27, 2005 - added special section of the circuits designed by David A. Johnson, P.E.
  • June 21, 2005 - DC Forum is now Open
  • Aug 13, 2006 - Added new section called Hobby Corner
  • June 23, 2007 - New section called Circuit Solutions added


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