Basic Wheatstone Bridge Circuit
A Wheatstone Bridge can be used to precisely measure very small resistance values.
The Wheatstone Bridge consists of four resistive arms forming two voltage-dividers and a dc voltage source.
The four resistors are configured in a diamond-like arrangement as shown. This is typical of how the Wheatstone Bridge is drawn.
The output, Vout, is taken across the terminals A and B.
Frequently, one of the bridge resistors is adjustable, like RV shown here in the circuit.
The Wheatstone Bridge consists of four resistive arms forming two voltage-dividers and a dc voltage source.
The four resistors are configured in a diamond-like arrangement as shown. This is typical of how the Wheatstone Bridge is drawn.
The output, Vout, is taken across the terminals A and B.
Frequently, one of the bridge resistors is adjustable, like RV shown here in the circuit.
The Wheatstone Bridge can be operated in a balanced or unbalanced condition, depending on the type of application.
The Wheatstone Bridge can be viewed more simply as two
voltage-dividers connected between a power supply, Vs, and with Vout measured across the terminals
A and B.