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Resistors
Welcome to our selection of vintage and hard-to-find electronic parts. Among our extensive collection, you will find our high-quality resistors. An essential component in many electronic devices, a resistor is designed to reduce the amount of current flowing through a circuit and distribute the voltage to the various components of the circuit.
When restoring or repairing older electronics, it can be difficult to find the exact resistor you need. That's where we come in. We have an extensive collection of resistors of all shapes and sizes, so you can find just the right components for your specific project.
No matter if you are a professional working on a complex repair or a hobbyist who likes to breathe new life into old equipment, we have the parts you need. And if you need advice on which resistor is best for your specific project, our expert team is here to help.
Explore our collection of resistors and find the perfect part for your vintage electronics project.
- Resistance is a fundamental component in electronics that limits or regulates the flow of electricity. It is a passive bipole that provides a specific resistance to the flow of current. This resistance is expressed in Ohm (Ω), named after the German physicist Georg Simon Ohm. The relationship between voltage, current and resistance is described by Ohm's law: V = I x R, where V is voltage, I is current and R is resistance. Resistors can be used in both direct current (DC) and alternating current (AC) circuits.
- There are several types of resistors, including fixed resistors, variable resistors, thermistors and photoresistors. Fixed resistors have a fixed resistance value, while variable resistors (such as potentiometers and rheostats) have an adjustable resistance value. Thermistors change their resistance with temperature, and photoresistors change their resistance with light levels. Resistors can also be classified based on their power ratings, tolerance, temperature coefficient, and type of construction (such as wire wound, carbon film, metal film).
- Resistors have numerous applications in electronic circuits. They can be used to regulate current, divide voltage, bias transistors, overcurrent protection circuits, and adjust signal levels. In analog electronics, resistors are used in filters, oscillators, and as load and pull-up/pull-down resistors. In digital electronics, they are used in logic gates, flip-flops, and as pull-up and pull-down resistors to prevent unwanted changes in logic states.
- Resistors are available in a wide range of values, ranging from less than one Ohm to many Megaohm. They are also available in various physical sizes, from small surface mount components to large wire-wound power resistors. The choice of a resistor depends on the required resistance value, power rating, tolerance, temperature coefficient, and other factors.
Noise in resistors
In physics and electronics, noise is a random fluctuation in an electrical signal, a characteristic inherent in all resistors. There are two types of noise associated with resistors: thermal noise and shot noise. Thermal noise, also known as Johnson-Nyquist noise, is the result of thermal movement of charge carriers within the resistive material. This type of noise depends on temperature, resistance value and bandwidth. Shot noise, also known as current shot noise, occurs when the current through the resistor is not continuous but consists of a flow of discrete electrons. This noise is proportional to the root of the current through the resistor. Although noise is often considered undesirable, it is sometimes intentionally introduced into circuits for purposes such as random number generation
