Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Circuits designed by David Johnson, P.E.
Last Updated on: Thursday, November 30, 2017 07:43 AM

List of Dave's Circuit Designs

The contents & graphics of Discovercircuits.com are copyright protected.
LINKING to Dave's circuits is permitted but DO NOT COPY any files to your WEB SITE server


 

AC Current Test Source
By: Dave Johnson

With that resistor I can easily get up to 20 Amps of current.  So far, that has been high enough for me.  The shunt resistor allows me to use my multimeter to accurately measure the AC voltage across the resistor, which is then proportional to the AC current.  In most of my tests, the AC current is a loop.  I might use the loop to calibrate a current transformer or test the voltage drop through a power supply board.  Although I donít have a shunt resistor large enough, this same method could be used to produce much higher AC current.  I have seen setups similar to mine which can produce over 1000 Amps of AC current. 

Click on Drawing Below to view PDF version of Schematic

List of Dave's Circuits
List of Circuits from DC Magazine

eMail David A. Johnson, P.E. about this circuit


DC Magazine, 2nd Quarter 2012, Page 4:  AC Current Test Source


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - November, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.