Passive Component Supplier
Passive components are the building blocks of electronic circuits. They provide voltage regulation, current regulation and noise filtering.
PassivEye focuses on the passive components sector of the electronics industry. Author Dennis M. Zogbi produces off-the-shelf market research reports through his wholly owned company Paumanok Publications, Inc as well as single client consulting and on-site presentations.
Resistors
Resistors are passive electrical components that limit or regulate the flow of electric current in circuits. dimmer They have two terminals that allow them to be connected to wires or other components in a circuit. They are often color coded to make it easier to read the resistance value. The most common resistors have a 3-digit or 4-digit code printed on them that represents the resistance value in ohms.
It is important to note that the amount of power dissipated by a resistor is not necessarily equal to its voltage drop. Over time, excessive power dissipation can raise the temperature of a resistor to the point where it can damage adjacent components or even catch fire. It is therefore essential to select a resistor with a sufficient power rating for its application.
It is also worth noting that resistors can be used to create a fixed voltage, which can help prevent the possibility of damage or overheating due to high-energy pulses. By connecting two resistors in series, it is possible to achieve a fixed voltage between the source and ground.
Capacitors
Capacitors are passive electronic components that store electrical energy on two closely spaced metal plates separated by an insulator. The amount of electric charge stored is known as the capacitor’s capacitance value.
When a voltage is applied to the plates of a capacitor electrons gather on one plate and repel away from the other, this creates an electric field with an attractive force between the plates. Once the side where the electrons gather can’t hold any more electrons it will stop letting new ones in, at this point the capacitor is fully charged.
The voltage that the capacitor is able to withstand is called its working voltage (WV) and it is important to not apply more than this as this can damage the dielectric material. Capacitors have a variety of working voltage ranges to suit a wide range of circuit applications.
Compared to other electrical components Capacitors have relatively low losses and are considered to be very efficient when used in the correct applications and under the right conditions. Capacitors require very little maintenance and will last for a long time if they are kept protected from water, oil and dust.
Inductors
Inductors are passive electrical components that store energy in magnetic field. Like capacitors they store energy in the form of electric fields but they also store energy as magnetic flux. They can be made in many different ways, but the most common is a wire coil, sometimes with or without a core. Inductors are marked with an L on electronic schematics.
When an inductor current changes, the time-varying magnetic field generates a self-induced electromotive force (emf) across its conductors. This emf has a polarity that opposes the change in current that caused it, so it resists the flow of current through the inductor.
Surface mount inductors are constructed by winding lengths of wire around a bobbin or other core and then enclosing the coil in special housing forms. These inductors are more compact and less bulky than other types of inductors. They offer a low thermal loading, high reliability, and reduced thickness. They can also be printed with a copper foil pattern for added electromagnetic interference (EMI) shielding. These inductors are often used for DC power supply circuits.
Transducers
Transducers are electronic devices that convert energy from a physical form into an electrical signal. They are a fundamental component of many projects including sensors, microphones, loudspeakers, thermometers and even antennas. They convert the forces of temperature, pressure and vibrations into an electrical output signal.
This electrical output is much easier to handle, transmit and process for measurement purposes. The signals are also less prone to mechanical errors due to the elimination of friction. Additionally, the Motor Controller power required to control the electrical systems is very minimal, making them compact and portable.
There are several types of transducers, classified into resistive, capacitive and inductive. Resistive transducers derive the energy needed for their energy change from an external power source, while inductive and capacitive transducers generate their own energy by interacting with the surrounding material. Common examples of resistive transducers include a strain gauge and a thermistor. Other common examples of transducers are accelerometer sensors (used in mobile phones for screen rotations) and oxygen sensors. Other commonly used sensors include position and speed sensors, and pressure sensors.
Sensors
Sensors are a key component in modern engineering, providing information that allows systems to react appropriately. This article explores the fundamental principles and diverse types of sensors, examining their many applications across industries.
Sensor technologies are used in many fields to improve our lives – they’re found in elevator buttons that detect your touch, and lamps that dim or brighten as you approach them (tactile sensors). They are also critical for industrial automation, allowing for control of processes that would be difficult to operate manually.
There are several factors to consider when selecting a sensor, including its range, accuracy, sensitivity and response time. The range refers to the maximum and minimum values that a sensor can measure. The accuracy is determined by comparing the sensor output to its calibration curve under static conditions. Sensitivity describes how much the sensor responds to changes in the physical quantity it’s designed to measure. Drift is the difference between repeated measurements over time and can be caused by slow changes in the sensor’s environment. Noise is any random variation in the sensor output that does not relate to the measured property.
