220 Ohm Resistor
Popular choice for LED current limiting in 5V circuits
3-Band Configuration
3-band: Red-Red-Brown
4-Band Configuration
4-band: Red-Red-Brown-Gold (±5%)
5-Band Configuration
5-band: Red-Red-Black-Brown-Brown (±1%)
6-Band Configuration
6-band: Red-Red-Black-Brown-Brown-Brown (±1%, 100ppm/°C)
LED Current Limiting
Perfect for limiting current in 5V LED circuits to ~20mA
Base Resistors
Controls base current in small-signal transistor circuits
Voltage Dividers
Creates specific voltage ratios in analog circuits
Pull-up Resistors
Weak pull-up for digital inputs in low-power applications
The 220 ohm resistor is perhaps most famous for its role in LED circuits, particularly in 5V systems. It provides the perfect current limiting for standard LEDs, ensuring they operate within safe parameters while providing adequate brightness. Beyond LED applications, it's also used in base resistor circuits for transistors and various voltage divider configurations.
💡 Pro Tips
- •Perfect for standard LED current limiting
- •Calculate LED current: (Vsupply - Vled) / R
- •Most common resistor in LED projects
- •Good starting point for transistor base resistors
Why Choose 220Ω Resistors?
Key Benefits
- ✓Standard E12 series value for universal compatibility
- ✓Available in multiple tolerance and power ratings
- ✓Cost-effective and widely available
- ✓Suitable for both hobbyist and professional applications
Technical Advantages
- •Stable performance across temperature ranges
- •Low noise characteristics for sensitive circuits
- •Multiple package sizes available
- •Compatible with automated assembly processes