robodatech.Color Code of Resistor
Resistor bands encode numbers. The first two bands are digits, the third is the multiplier, and the tolerance band gives allowed variation.
Working Principle
Resistor bands encode numbers. The first two bands are digits, the third is the multiplier, and the tolerance band gives allowed variation.
Step by Step
- Read bands from the end with bands closer together.
- Convert first two colors into digits.
- Use the multiplier band for zeros.
- Use tolerance to understand allowed error.
Working Simulation
Verified Learning Notes
A 4-band resistor uses first digit, second digit, multiplier, and tolerance. Gold tolerance is commonly +/-5%.
Color codes help identify LED resistors, pull-up/pull-down resistors, and voltage-divider values.
Always remove power before measuring resistance with a multimeter.
Decode a resistor by color, then verify it with a multimeter and compare the tolerance range.
Simulation Challenge
Use the working simulation above before touching wires. Change one value or command at a time, predict the result, then compare it with the diagram and the real module.
- Say what input changed.
- Predict the output.
- Run the simulator.
- Explain why the result is correct for Color Code of Resistor.
Authenticity Checklist
- Does the diagram match Arduino Nano pin names?
- Does every signal have a common ground reference?
- Is the module powered at its correct voltage?
- Does the explanation separate signal, data, power, and mechanical motion?