I am new to this field..I have just worked on micro-controllers in the college..
I want to use an Arduino board to measure DC voltage range 0 to 24v, current range 0 to 220 A, temperature range 0 to 250 degree Celsius.
It is easy to find sensors to measure small voltages and currents but i am unable to find sensors that can be connected to measure such huge voltages and currents..This will be used to measure power and temperature of an electromechanical power generator..Please suggest some ideas..
Well I hope you're not new to electricity, since that is some hefty power and you'll need to know what you're doing on the power side, never mind the micros.
You can measure 0-24 volts simply by using a resistive voltage divider on analog in. One consisting of a 9Kohm and 1Kohm resistor will divide the input voltage by 10.
Yes with those current levels you must avoid wearing metal jewelry such as a metal
watch strap - horrific burns have been the result of not heeding this advice. Steel rapidly
becomes orange hot with that sort of current.
Also eye-protection from any sparks is a good idea.
The good news is 24V is pretty safe from an electrocution point-of-view.
Keep sensitive circuitry well away from high-current conductors, they will induce
significant noise voltages onto nearby circuitry by electromagnetic induction.