Amp meter for the Arduino?

Forum 2005-2010 (read only) Hardware Interfacing
1

I'd like to be able to sense electrical current (if it matters, DC, in the 0 - 4 amp range) with the Arduino. I'm new the wonderful world of Arduinos, can anyone point me in the right direction?

And is there some main list of available sensors, etc?

Any tips at all?

Thanks for the help.

2

hi

the normal way to sense that would be to put a very low value resistor in line with the power supply.. something like .05 or .01 ohms. This involves building a circuit to amplify that small voltage drop to the 0-5V range.

The easy way is to buy a current-sense module that puts out 5V. Check the Digikey catalog, and do a little googling and you will find just what you need.

D