Power Resistor Calculator Program Ver 1.00

© copyright Circle Software 2005

This program will calculate the required resistance, in Ohms, and the power rating of the resistor needed to drop the Nominal voltage across it. The power will be rounded up to the nearest Watt and the resistance will be rounded up to one decimal place. (This can be used to determine if a Wallwart will have the voltage needed at a given current value. NOTE: This is an itterative process, it is very rare that the first resistor value will drop the desired voltage at the desired current. Also, there may be NO "good" match for the given Wallwart. Either the Voltage or current won't match when the other does.)

Nominal Voltage: (volts):             Current desired (mA):  

Resistor Value


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