ESD EXPERIMENT III
Design and implement Transducer interface using Wheatstone bridge.
The Wheatstone Bridge was
originally developed by Charles Wheatstone to measure unknown resistance values
and as a means of calibrating measuring instruments, voltmeters, ammeters, etc,
by the use of a long resistive slide wire.
Although today digital multimeters provide the simplest
way to measure
a resistance. The Wheatstone
Bridge can still be used to measure very low values of resistances down in
the milli-Ohms range.
The Wheatstone bridge (or resistance bridge) circuit can be used in a
number of applications and today, with modern operational amplifiers we can use
the Wheatstone Bridge Circuit to
interface various transducers and sensors to these amplifier circuits.
The Wheatstone Bridge circuit is nothing more than two
simple series-parallel arrangements of resistances connected between a voltage
supply terminal and ground producing zero voltage difference between the two
parallel branches when balanced. A Wheatstone bridge circuit has two input
terminals and two output terminals consisting of four resistors configured in a
diamond-like arrangement as shown.
Figure
3.1: Wheatstone Bridge
When balanced, the Wheatstone bridge can be analysed simply as two series strings in parallel.
Refer following video for detail explanation😃👇:
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