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Pick Resistors for Arduino & LEDs

Identify the resistor you need for LED current limiting and pull-ups.

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1 kΩ
±5% tolerance
Range: 950 Ω – 1.05 kΩ

Digit 1

Digit 2

Multiplier

Tolerance

💡 Read bands from the end with the tolerance band (often gold or silver) on the right. 4-band resistors use two significant digits; 5- and 6-band use three for tighter precision.

Arduino tips

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A typical LED current-limiting resistor is 220Ω-330Ω (red-red-brown or orange-orange-brown).

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Pull-up/pull-down resistors for buttons are usually 10kΩ (brown-black-orange).

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Found a loose resistor in your kit? Match its bands here to know exactly what it is before soldering.

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Per què usar la nostra?

✓Completament gratuït — sense costos ocults, mai
✓No cal compte, correu electrònic ni inici de sessió
✓Els fitxers no surten mai del teu dispositiu
✓Sense cap límit de mida de fitxer
✓Sense marques d'aigua en cap sortida

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🎛️

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🔬

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🌡️

Decode 6-Band Resistors

Read precision resistors that also specify a tempe

🎓

Learn the Resistor Color Code

Practice reading bands and check your answers whil

Preguntes freqüents

Back to Resistor Color Code Calculator