What Is A Shunt Resistor, How Does It Calculate Current & How To Make One (DIY)

Element resistors, or Shunts, are produced using a solid piece of resistance material. Shunts are commonly used to measure the current output of a circuit. The voltage drop across the extremely lower resistance value can be used to calculate current flow in high current applications.

By measuring the voltage across the shunt and knowing the shunts resistance value, we then can calculate the current I = V / R

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Hi, I'm Hamed, an Electrical & Electronics Engineering Student in Leeds, UK. At the time of recording this video I am approaching my third and final year at university.

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[DaymeEdna]

You have explained the what, how and why of shunts brilliantly. I finally understand! Thank you.

[johnr]

The subject of shunts has confused me for ages....but not any more 👍Very well explained. Thank you.

[codebeat]

Good vid. The reason why the calc is a bit off is because you measure in between/halfway the wires and clips. The cables and clips you are using also have some resistance especially at a higher current. When you put the shunt at the beginning of the wires it will be more accurate and measures the current thru the whole circuit (with all the losses).

[mtrltoolman]

Thanks brother.
By the way this jumper wires affect the measuring because of the there resistance.

[mickadams]

Loving the Ohm’s Law example. The basis of all electronic understanding. Another great video Hamed.

[bones]

All the dotty professors and technophobes on utube cannot explain it better than you have. Well done.

[acestudioscouk-Ace-GACE]

Really well explained. I understand how it works now, thank-you. I've subscribed. 👍

[iquzvpn]

table for check ohm per awg no.
AWG 22 54.8 ohm /1000m

[garywashington]

The accuracy of the displays on similar power supplies may not be very accurate at all values. I suggest a 4 wire measurement where you measure the current and voltage to eliminate the influence of the power supply display accuracy. Nice work.

[jww]

just starting electronics and this was very helpful.i am advised I need a shunt resistor or resistance to get good component trace on scope.
I am trying to setup an oscilloscope with a built in waveform generator to produce visual of component curve traces.
does the component bing tested need a certain value shunt resistance, or do I have to try several resistors to see what gives best visual trace?
thanks

[leohobbleohobb]

vERY GOOD CONTENT.When you measure ohm with your fingers are in contact with multimeter probes will affect the reading where precision is needed(depend how moist your skin are)I am trying to fix my RND or Korad KA320-3005D 30V 5Amp dc bench power supply where i made a fool, s mistake and blew the reverse protection diode and the 7 wide winding .s(to avoid a short)1.2mm thick wire. Wire is not clean copper i think, cause it is stiffer than a copper wire.Do you have a tip witch type wire is used?.On EVVblog forum i can se pictures of this part in a Korad psu same as mine but no usb out.schematic show a value of 0.1 ohm 5 watt.Seems to be a strange low watt value on that psu.I have 2 identical if i need +15 zero/common and negative 15 as example.Any tip you can think of?

[michaeljoshuamanallo]

I made it with the same wire and it shows 5.2 millivolt voltage drop can I use it

[SPD]

Can I donate a ruler or a tape measure?

[dalegriffiths]

why can't you just put the multimeter in series to get the circuit current, 690mA is quite high - most multimeters will even have a micro ammeter setting won't they?