1 M ohm Resistor
The 1MΩ (1,000,000 Ohm) Resistor is a precision 1/4W metal film resistor with a tight 1% tolerance, ideal for DIY electronics, Arduino projects, and prototyping. This very high-value resistor is essential for op-amp input bias, RC timing networks with long delays, capacitive touch sensing, multimeter input dividers, and FET gate biasing. With excellent stability, low noise, and reliable long-term performance, it's a fundamental component for hobbyists, students, and engineers working on high-impedance circuits.
المقاومة 1 ميجا أوم (1,000,000 أوم) هي مقاومة دقيقة من نوع Metal Film بقدرة 1/4 واط وتفاوت 1%، مثالية لـ مشاريع الإلكترونيات DIY ومشاريع Arduino والنماذج الأولية. تُعدّ هذه المقاومة عالية القيمة جداً ضرورية لـ تحييز مداخل مضخمات الإشارة، ودوائر التوقيت RC ذات التأخير الطويل، واستشعار اللمس السعوي، ومقسّمات الجهد للأجهزة القياس، وتحييز ترانزستورات FET. تتميز بثبات ممتاز وضوضاء منخفضة وأداء موثوق طويل الأمد، وهي مكوّن أساسي للهواة والطلاب والمهندسين العاملين على الدوائر عالية الممانعة.
The 1 Megaohm (1MΩ) Resistor is a high-quality 1/4 Watt metal film resistor designed to deliver accurate and stable resistance in a wide variety of electronic circuits. With a precise 1% tolerance, it ensures consistent and predictable performance, especially in high-impedance and precision-sensitive applications. Metal film resistors are preferred over carbon film types because they offer lower noise, superior thermal stability, and higher long-term accuracy, all of which are critical when working at very high resistance values.
The 1 megaohm (1MΩ) value is widely used wherever extremely low current flow and very high input impedance are required. Common applications include op-amp input bias and feedback networks, JFET/MOSFET gate biasing, RC timing circuits with very long time constants, input voltage dividers in digital multimeters and oscilloscope probes, and capacitive touch sensors built around microcontrollers like Arduino (using the CapacitiveSensor library). It's also a popular pull-down resistor for floating analog pins and high-impedance audio inputs in instrumentation circuits.
Manufactured in a standard axial-lead through-hole package, this resistor easily integrates with breadboards, perfboards, and printed circuit boards (PCBs), making it ideal for both rapid prototyping and permanent installations. It is fully compatible with all popular development platforms, including Arduino, Raspberry Pi, ESP32, ESP8266, STM32, and PIC microcontrollers.
Specifications
- Resistance Value: 1 MΩ (1,000,000 Ohm)
- Power Rating: 1/4 Watt (0.25W)
- Tolerance: ±1% (Precision Grade)
- Resistor Type: Metal Film
- Mounting Style: Through-Hole (Axial Lead)
- Lead Material: Tinned Copper
- Compliance: RoHS Compliant
- Operating Temperature Range: Typically -55°C to +155°C (standard for metal film)
Applications
- Capacitive Touch Sensors — Arduino-based touch interfaces using CapacitiveSensor library
- Op-Amp Input Bias & Feedback — high-input-impedance amplifier circuits
- JFET / MOSFET Gate Biasing — high-impedance input stages
- Long-Duration RC Timing Circuits — extended delays with 555 timer ICs
- Multimeter & Oscilloscope Input Dividers — high-impedance test equipment
- High-Impedance Voltage Dividers — measuring high voltages with minimal loading
- Pull-Down Resistors for Floating Analog Pins — preventing noise pickup
- Audio Preamplifier Input Bias — high-impedance microphone and instrument inputs
- Filter Networks — passive RC filters with very low cutoff frequencies
- Oscillator Circuits — very low-frequency oscillators and signal generators
- Charge Sensing Circuits — electrostatic and electrometer designs
- Sensor Interfacing — biasing extremely high-impedance sensors
- Arduino & Microcontroller Projects — prototyping and learning kits
- Educational Electronics — schools, universities, and STEM labs
- General-Purpose Electronics — repair, modification, and DIY builds