measuring voltage and current

is it possible to measure both voltage and current with an arduino, not at the same time that is…i want to measure from 1.5 to 24 volts DC and 0 to 1000 ma…would i need an external adc or voltage divider to do it

Yes it is possible. To measure currentnyou measure the voltage across a current sensing resistor in line with what younwantnto measure. Or if it is a big current you can use a current sensing transducer, like a hall effect one.

Google "ammeter shunt" "voltmeter multiplier"