





1k Ohm Resistor – ¼ Watt Carbon Film Resistor
A 1k resistor is a passive electrical component with a resistance of 1,000 ohms. The "k" in 1k is an abbreviation for the prefix "kilo". High-precision 1kΩ resistor with ¼ watt power rating and ±5% tolerance – ideal for Arduino, LED circuits, voltage dividers, transistor biasing, and general DIY electronics prototyping.
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Product Description (Detailed):
Meet the workhorse of countless electronic circuits: the 1k Ohm ¼ Watt Carbon Film Resistor. This small yet indispensable passive component is a cornerstone for any electronics enthusiast, student, or professional, offering reliable performance and broad applicability. With a resistance value of 1000 Ohms (1kΩ) and a power rating of ¼ Watt (0.25W), it's perfectly suited for low-power and general-purpose circuit designs.
Carbon film resistors are renowned for their cost-effectiveness, stability, and good performance across a wide range of temperatures. They are manufactured by depositing a thin, homogeneous film of carbon onto a ceramic rod, with a helix cut into the film to precisely achieve the desired resistance value. The most common tolerance for these resistors is ±5%, easily identified by their standard four-band color code: Brown, Black, Red for the 1k Ohm value, typically followed by a Gold band for the 5% tolerance.
The 1k Ohm resistor finds its utility in a vast array of applications. It's frequently used for current limiting, protecting sensitive components like LEDs from excessive current. It's also a fundamental element in voltage divider circuits, allowing you to derive specific voltage levels from a higher source. Furthermore, it serves as a common pull-up or pull-down resistor in digital circuits, ensuring stable logic states for microcontrollers. Its compact axial-leaded design makes it ideal for breadboards, perfboards, and through-hole PCB mounting, simplifying prototyping and final assembly. Whether you're building basic LED circuits, sensor interfaces, or more complex embedded systems, the 1k Ohm ¼ Watt Carbon Film Resistor is a go-to component for its versatility, reliability, and economic value.
The 1kΩ (1000 Ohm) resistor is a versatile and essential component for all types of electronic circuits. Widely used in Arduino, ESP32, and Raspberry Pi projects, it works well in LED current limiting, voltage dividers, sensor interfaces, and transistor biasing circuits.
Its carbon film build and axial lead design ensure easy placement on breadboards, perfboards, and PCBs. The standard E12 value makes it a staple in DIY kits and educational electronics.
Key Features:
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Resistance: 1kΩ (1000 Ohms)
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Power Rating: 0.25W (¼ Watt)
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Tolerance: ±5%
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Type: Carbon Film, Axial Leaded
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Color Code: Brown – Black – Red – Gold
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Suitable for Arduino, Raspberry Pi, ESP32, sensor interfacing, and analog circuits
Technical Specifications:
Parameter | Specification |
---|---|
Resistance | 1kΩ (1000 Ohms) |
Power Rating | 0.25W (¼ Watt) |
Tolerance | ±5% |
Type | Carbon Film |
Mounting Type | Axial Through-Hole |
Color Code | Brown – Black – Red – Gold |
Operating Temperature | -55°C to +155°C |
Lead Spacing | ~7–8 mm |
How to Use:
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Place the resistor in series with LEDs to limit current.
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Use in voltage divider circuits with other resistors.
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Great for transistor base current limiting and sensor signal conditioning.
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Insert into breadboard or solder onto PCB.
Pro Tip: For 5V to LED setups, 1kΩ offers safe brightness and prevents LED burnout.
Applications:
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LED current-limiting for 3.3V/5V systems
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Pull-up/pull-down resistors in GPIO circuits
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Transistor switching and biasing
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Sensor output conditioning
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Voltage dividers for analog inputs
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Arduino and microcontroller-based circuits
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DIY electronics and academic kits
Package Includes:
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1 × 1kΩ ¼ Watt Resistor
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