Resistor and Capacitor Codes
Most electronic components are so small that printing the actual values, ratings and
tolerances on the individual component is nearly impossible. Therefore, codes were invented
early in electronic history and printed on the components to describe what they were. Many
of these codes are still in use today.
Below I've listed some of the more common codes that you are likely to come across while
building this project.
How to Identify Power Ratings and Resistor Value Color Codes.
This project uses different types of resistors. The diagrams below will assist you in locating
and identifying resistor values, tolerances and ratings for the various circuit requirements for
your project.
Resistor Power Ratings
Not only are resistors graded by their values but also by their power ratings. Power ratings
are determined by how much heat (power) can be safely dissipated by the resistor. Higher
ratings are usually indicated by larger sizes.
Below are photos and descriptions of the various resistors used in this project.
A
Appendix A
Carbon Composition 1/2W
Carbon Film 1/2W
Metalized Film 1/2W
Carbon Film 1W
Metal Oxide 1W
Metal Oxide 2W
Metal Oxide 3W
26 TubeDepot.com
