First attempt, a DIY shunt resistor

[Teno]

Hello there!

Firt try at creating a simple shunt resistor.

Beside using some specific wire, just made one using common materials.



I'm happy, it works!





Is 1mv per 100mA.

Now I wnat to buid another one.

Wich material should I use?

Cheers from Argentina!

https://otroblogdemarcelo.wordpress.com/2019/09/21/shunt/

[joeqsmith]

I have no idea what your "common" materials are but you may want to consider something more stable than copper.   

https://www.quora.com/Why-are-alloys-like-constantan-and-manganin-used-for-making-standard-resistors

Here is a link where I was attempting to make my own.
https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/msg1168820/#msg1168820

[MagicSmoker]

A proper shunt resistor will be made of manganin (or, less commonly, constantan) because these alloys have relatively high bulk resistivity and a near-zero temperature coefficient of resistance, but you can get decent results with stainless steel. The tempco of stainless steel isn't zero, but it's much lower than mild steel and doesn't corrode/rust.

For example, a 1mm diameter 316SS wire that is 10.61cm long will have a resistance of 0.100 Ohms (bulk resistivity of 74 microOhms-cm).

[Teno]

I have no idea what your "common" materials are but you may want to consider something more stable than copper.   

https://www.quora.com/Why-are-alloys-like-constantan-and-manganin-used-for-making-standard-resistors

Here is a link where I was attempting to make my own.
https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/msg1168820/#msg1168820

Common= stainless steel wire

Cannot have access to any suitable material other than kanthal, bring any to Argentina is quite hard