I'm trying to use an Arduino to monitor the current on a welder. The max current I think I should encounter is 200 amps. Has anyone ever found a current transformer that has a high enough ratio to enable me to use with Arduino analog pins, with other circuitry in between of course? Thanks.
You might want to look into hall-effect current sensors...another option, at least.
No intermediate circuit required. Although not the range you require, if you look at the above link you'll find transducers that operate off a 5 volt supply and output a DC signal suitable for direct input to the arduino.
You do appreciate that a current transformer works on AC only, whereas a hall effect transducer can be obtained for both AC and DC.
jack
I appreciate it now. I wasn't aware of that; this would be strictly dc current. I didn't think about a hall effect. Thanks a lot.