Web DiscoverCircuits.com

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

DiscoverCircuits.com, has 28,000+ 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 material posted by the designer. 
Please let us if you would like us to link to your design.
HOME Schematics Discover Forum Hobby Corner Dave's Circuits Electronic Resources Book Corner Contact Info

DiscoverCircuits.com  --   Dave's Circuits
Circuits designed by David Johnson, P.E.

Find Dave's Circuits by Category
Last Updated on:  06/17/2009 03:29:30 PM

AC/AC Converters    AC to AC Power Supplies 
AC to DC Converters   Inverters 

The contents & graphics of Discovercircuits.com are copyrighted.
LINKING to Dave's circuits is permitted
but DO NOT COPY this data to your WEB SITE server.

Click on Drawing Below to view PDF version of Schematic
4 – 20ma Current Loop Tester
This circuit injects an adjustable current through a wire loop.  Using a digital current meter, the current can be adjusted from near zero to over 24 milliamps.

Circuit 4 - 20MA Current Loop Tester designed by Dave Johnson, P.E. (Nov 2, 2004)

Constant Current / Current Sink

Master Schematic Category List - David A. Johnson, P.E.
 
HOME Schematics Discover Forum Hobby Corner Dave's Circuits Electronic Resources Book Corner Contact Info

 Linking is welcomed but COPYING any content or graphics to your web site is expressly prohibited.

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