Model Railroad System
2.2.2
Overall User Manaual
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The Resistor Calculator program aids in calculating dropping resistors for LEDs and low-voltage lamps commonly used on model railroads. It implements Ohm's Law, shown in the equations below to perform the calculation and then finds the nearest stock value and also displays the color bands for typical carbon resistors.
The calculator takes three input values, the supply voltage ( ), the voltage across the load (
) (LED or lamp) and the load current (
) the LED or lamp operates at. These values are entered along with the units they are in. Then the calculate button is pushed and the results are displayed. The results can also be saved to a text file, which can be printed or otherwise referred to later.
The main GUI screen of the Resistor Calculator program is shown here: