DiscoverCircuits.com, has 30,000+ 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 or post your
design.
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
I designed a circuit similar to this one years ago to accurately measure the air
temperature inside a building 1000s of feet from a control room. The circuit
uses a very robust current loop method. It uses a highly accurate
semiconductor temperature sensor and an equally accurate voltage reference. The
circuit includes a diode bridge, so it is polarity independent. By using the
component values indicated, the circuit should not require calibration. It
has a range from –40F to +120F and an accuracy of +/- one degree F.
Click on Drawing Below to view PDF version of Schematic
