HI. I'm planning to construct this ICL based ammeter : http://electronics-diy.com/ICL7107_digital_ammeter.php where it is stated that "the 0.01 Ohm resistor should be made out of 1.5mm thick / 5cm long copper wire". I think this is an error since someone needs much much longer 1.5mm thick copper wire to get 0.01 ohm . Don't you?

 

hi Eddy.
Looks wrong to me too.
Look at this table link.
https://www.engineeringtoolbox.com/copper-aluminum-conductor-resistance-d_1877.html

E

 

Hello,

The site states 1.5 mm instead of 1.5 mm².
The area will be around 1.77 mm².
https://www.convert-me.com/en/convert/wire_gauge/?u=wirediametermm&v=1.5

Bertus

 

hi,
There is only a small difference between 1.5mm thick and 1.5mm Sqr
https://www.engineeringtoolbox.com/wire-square-mm-diameter-d_1874.html

E

 

So in both cases the statement seems to be wrong. Is there a way to home make a 0.01 ohm shunt resistor or should i buy one (very hard to find in my country). Thanks again.

 

hi,
I would suggest eBay as a source.
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=0.01+Ohm+resistor&_sacat=0
E

 

Thanks a lot.