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4.7 kohm Resistor 1/4 Watt | Carbon Film Resistor for Arduino & Robotics Projects
Disclaimer: This resistor is rated for 1/4 watt (0.25W) maximum power dissipation. Exceeding this rating may cause overheating or damage. Verify your circuit's power requirements before use.
4.7 kohm resistor 1/4 watt
The 4.7kΩ (4700 Ohms) resistor is one of the most frequently used components in electronics. It is a "bread-and-butter" value typically used for pull-up/pull-down resistors, current limiting for low-power LEDs, and as a biasing component in transistor circuits. Built with carbon film technology, this 1/4 watt resistor offers stable performance, low noise, and ±5% tolerance. Its axial leads are breadboard-friendly, making it a staple for any electronics workbench, from beginner kits to advanced robotics projects.
Specifications
- Resistance Value: 4.7 kΩ (4700 Ohms)
- Power Rating: 1/4 watt (0.25W)
- Tolerance: ±5% (standard E24 series)
- Technology: Carbon film (high stability, low noise)
- Temperature Coefficient: ~250-450 ppm/°C (typical)
- Maximum Operating Voltage: 250V (depending on lead spacing)
- Lead Type: Axial, tinned copper (breadboard friendly)
- Body Color: Light blue or beige with color bands (yellow, violet, red, gold)
- Dimensions: Body length ~6-7mm, diameter ~2-2.5mm; lead length ~25-28mm
Applications
- Pull-up resistors for I2C communication (e.g., SDA/SCL lines with Arduino/ESP32)
- Pull-down resistors on digital input pins to prevent floating states
- Transistor base biasing (e.g., controlling relays or motors with BJTs)
- Current limiting for low-power LEDs (when used with 9V–12V supplies)
- RC timing circuits (combined with capacitors for delays or filters)
- Voltage dividers for sensor signal conditioning
- Robotics projects – button debouncing and logic level interfacing
Package Includes
- 1 x 4.7 kohm resistor (1/4 watt, carbon film, ±5%)
Final note: Always read the color code to confirm the value before soldering: Yellow (4), Violet (7), Red (×100), Gold (±5%). For high-current or high-frequency applications, consider using metal film resistors for tighter tolerance and lower noise. When using multiple resistors in a circuit, keep leads short to minimize parasitic inductance.
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