Component Calculators

Java is required for these applets to run. See Computers section.

Resistor Colour Calculator:

This applet can calculate the values of resistors using the standard 4 or 5 colour band system. The values are returned in ohms, k ohms and M ohms and a tolerance value is also given.

When reading resistors, you read from left to right in order - the right most band has a larger gap between itself and the rest of the bands on the left.

Notes:
With the 4 band resistor, the 4th band is selected using the last list of colours (this is the tolerance band).
Only Gold and Silver multiplier bands are supported with the five band resistor types by the 4th column.
With some calculated values the program fails to round properly - simply round a value like 1.199999999 to 1.2 to get the correct value.

You can download it here. Simply extract the zip file and run the run.aspx file.
The Java file is here.

Capacitor Calculator

This applet is more simple, just select the three numbers written on the capacitor and this applet will return the value in pico farads, nano farads and micro farads.

You can download it here. Simply extract the zip file and run the run.aspx file.
The Java file is here.

Content date Jan 2006