10pcs 1k ohms 4 band resistor 1/2 watt

🔹 10PCS 1k Ohm (1kΩ) Carbon Film Resistor – 1/2 Watt, 4-Band

A versatile and essential through-hole resistor pack for current limiting, voltage division, pull-up/pull-down circuits, and general use in electronic projects. The 1k ohm value is one of the most commonly used resistances in prototyping and circuit design.

✅ Specifications:

• Resistance: 1,000 Ohms (1kΩ)

• Tolerance: ±5% (Indicated by Gold 4th band)

• Power Rating: 1/2 Watt (0.5W)

• Type: Carbon Film (General Purpose)

• Band Code: 4-Band

  • 1st Band: Brown (1)

  • 2nd Band: Black (0)

  • 3rd Band: Red (Multiplier x 100)

  • 4th Band: Gold (±5%)

• Package: Axial Leads

• Lead Spacing: Standard ~10mm (0.4″)

• Operating Temperature: -55°C to +155°C

• Quantity: 10 pieces

⚙️ Key Features:

• Universal Value: The 1kΩ resistor is a fundamental component found in nearly every electronics project, perfect for LED current limiting, Arduino I/O, and signal conditioning.

• Clear 4-Band Coding: Easy-to-read color bands (Brown, Black, Red, Gold) for quick identification and verification.

• Reliable Carbon Film Construction: Provides stable performance for general-purpose applications at a low cost.

• Adequate Power Rating: The 1/2W rating handles more power than common 1/4W resistors, offering a margin of safety for many circuits.

• Breadboard & PCB Friendly: Long axial leads make it easy to insert into breadboards, perfboards, or PCBs.

📦 Typical Applications:

• LED Current Limiting: Most common use—protects LEDs when connected to 3.3V, 5V, or 12V sources.

• Pull-Up / Pull-Down Resistors: For microcontroller GPIO pins (Arduino, Raspberry Pi), button inputs, and I2C buses.

• Voltage Dividers: Creating reference voltages or scaling sensor outputs.

• General Circuit Biasing & Signal Attenuation: In audio circuits, transistor biasing networks, and op-amp feedback loops.

• DIY Electronics & Repairs: Essential for prototyping, hobbyist kits, and fixing consumer electronics.

🔧 Usage & Calculations:

• Ohm’s Law (for sizing):

  • Max Current: I=P/R=0.5/1000≈0.022AI=P/R​=0.5/1000​≈0.022A or 22mA.

  • Max Voltage: V=P×R=0.5×1000≈22.4VV=P×R​=0.5×1000​≈22.4V.

• For a 5V LED Circuit: R=(Vsupply−VLED)/ILEDR=(Vsupply​−VLED​)/ILED​. With a typical 2V LED at 20mA: $(5-2)/0.02=150\Omega$. A 1kΩ resistor would provide a safer, dimmer current of ~3mA.

• Reading the Bands: Remember the mnemonic: Black Brown Roy Great Britain Very Good Wine (0-9 for bands 1-3).

⚠️ Important Considerations:

• Power Dissipation: Ensure your circuit does not exceed 0.5W of power dissipation through the resistor (P=I2RP=I2R or P=V2/RP=V2/R). For high-power applications, use a higher wattage resistor.

• Heat: A resistor operating near its full power rating will get hot. Provide adequate ventilation.

• Tolerance: The actual resistance can vary between 950Ω to 1050Ω. For precision circuits, measure with a multimeter.