modified 6 years ago

Low Resistance Meter

00:54:39

Detects very small resistance changes in the blue resistor and converts it to voltage.

Emitter resistor sets the sensitivity; eg at 1k ohm, the range is about 0.001 to 0.02 ohms.  Higher emitter resistor values increase the range up to 0.2 ohms. 

Could work as a rough temp sensor; use a little loop of fine wire as a probe and heat will affect the resistance dramatically. The differential amplifier allows long wires to be attached to the probe being measured; any noise that affects both wires will not be amplified.

published 11 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.