What are shunt & jumper resistors used for in circuits?

what are shunt resistors used for in circuits?

What are jumper resistors used for in circuits?

can i do see them in circuit but don't know how to use them if you're designing a circuit board

Shunt resistors are often used to measure current. They are precise resistors with a small value, so they can be reliably used for calculations.

For example, if you know a shunt resistor has a value of 1ohm, then when you force a current across it and read the voltage, that voltage will be equal to the current through the resistor.

Re: What are shunt & jumper resistors used for in circuits?

yes i have seen those

What others have u seen?

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I have seen those bare wire jumps that look like staples on PCBs , but i have no idea why a designer or circuit would need those and used for


What resistor value can I use in parallel with any resistor value thats on a PCB that can be like a break or open resistor ? would it be a 10Meg or what value please? that can be used with any resistor value in parallel?

Re: What are shunt & jumper resistors used for in circuits?

well thats the primary purpose I have seen them used for, but really anything requiring a small but precise voltage could use them.

I am using a shunt resistor right now in a current driver I just built. I use the .47 ohm shunt resistor to provide a feedback voltage to an opamp, without dissipating much power in the resistor. Since I am trying to get a lot of power from my circuit, the shunt resistor is ideal, because my 1.5A drive does not dissipate much power in a resistor with that small of a value.

Op amp circuits commonly have them, like mine mentioned above.

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walters said:

yes i have seen those

What others have u seen?

- - - Updated - - -

I have seen those bare wire jumps that look like staples on PCBs , but i have no idea why a designer or circuit would need those and used for


What resistor value can I use in parallel with any resistor value thats on a PCB that can be like a break or open resistor ? would it be a 10Meg or what value please? that can be used with any resistor value in parallel?

Click to expand...

The "staples" are lengths of wire with a very small but known resistance. You will almost always find one in a multimeter, because they are most commonly used to measure current without putting much load on the circuit.

Any resistor in parallel with another resistor will have a total value no greater than the smallest of the two resistors. A calculation for resistors is:
1/A = 1/R1 + 1/R2

given this, if you have a 100 ohm resistor in parallel with a 100k ohm resistor, the resistance will be just less than 100 ohms. if you have a 100 ohm resistor in parallel with a 10 ohm resistor, the resistance will be just less than 10 ohms.