Hi Guys,
Would it be possible to be measure voltage and current with my arduino using the analog input pins? I'd like to measure a voltage between 0-9V, and a current between 0 and 30mA. The numbers aren't too extreme so would this be possible without using any other special ic's ?
The voltage divider suggestion will work to measure voltage.
For current, you would use a resistor as a shunt and measure the voltage across the resistor.