# BTEC HND Level 3 Unit 19: Electronic Devices and Circuits assignments answers

As electronic devices become increasingly commonplace, understanding how they work is becoming more important. This assignment will explore the basic concepts of electronic circuits and devices, providing a foundation for further study. Whether you’re interested in learning about electronics for personal or professional reasons, we hope you find this information useful!

As electronic devices get smaller and smaller, the amount of current that can flow through them also gets smaller. This is why you need a higher voltage to run a computer chip than you do to run a light bulb.

Atoms are the basic building blocks of all matter. In an electronic device, some of the atoms are replaced by electrons that flow freely through the device. The number of electrons in an atom can be changed by adding or removing energy. When energy is added, it causes the electron to move from one atom to another; this is what happens when electricity flows through a wire.

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The voltage on a battery is a measure of how much energy is available to push electrons through a device. The more volts on a battery, the more energy it has.

Current is the flow of electrons through a device. The amount of current flowing through a device is measured in amperes or amps.

A resistor is a device that limits the amount of current that can flow through it. Resistors are used in electronic circuits to control the amount of power that is delivered to a device.

A capacitor is a device that stores energy in the form of an electrical field. When electricity flows through a capacitor, it causes the electrons to move back and forth between the two plates. This movement of electrons creates an electrical field that stores energy.

An inductor is a device that stores energy in the form of a magnetic field. When electricity flows through an inductor, it creates a magnetic field that stores energy.

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## Assignment Task 1: Explore the safe operation and applications of analog devices and circuits that form the building blocks of commercial circuits.

Analog devices and circuits are the basic building blocks of most commercial electronic circuits. While digital devices and circuits are becoming more prevalent, analog devices and circuits still have a number of advantages that make them an important part of electronic design.

Analog devices are those that function by continuously varying some property, such as voltage or current, in response to a varying input signal. This is in contrast to digital devices, which use discrete values (either zero or one) to represent information. Because they can represent a wide range of input signals, analog devices can be used to create circuits with a greater dynamic range than is possible with digital circuits.

Circuits built from analog components also tend to be less susceptible to noise and interference than digital circuits. This is because the output of an analog circuit is still a close approximation of the input signal, even if the signal is distorted by noise or interference. Digital circuits, on the other hand, can be completely corrupted by a small amount of noise or interference.

Analog devices and circuits are also more tolerant of mismatches between components than digital devices are. This is because the output of an analog circuit is still a close approximation of the input signal, even if the components are not perfectly matched. Digital circuits, on the other hand, can be completely corrupted by a small mismatch between components.

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## Assignment Task 2: Explore the safe operation and applications of digital logic devices and circuits that form the building blocks of commercial circuits.

Digital logic devices are the basic building blocks of all digital circuits. A digital circuit is a network of interconnected logic gates that performs a specific task, such as decoding a digital signal or controlling the flow of data through a computer.

Logic gates are usually designed to operate on two input signals, but some gates can also be used with more than two inputs. The most common type of logic gate is the AND gate, which produces an output signal that is high only if both input signals are high. The OR gate produces an output signal that is high if either or both input signals are high, and the NOT gate simply inverts the state of an input signal.

Digital logic devices can be divided into two categories: combinational logic and sequential logic. Combinational logic gates are connected in such a way that the output of one gate is the input to the next gate. Sequential logic gates are connected in such a way that the output of one gate is used to control the next gate.

Digital circuits are typically designed to operate with a fixed supply voltage. However, some circuits can be designed to operate with a variable supply voltage. In most cases, the maximum voltage that can be safely applied to a digital circuit is limited by the maximum safe operating voltage of the logic gates used in the circuit.

Digital circuits are typically more reliable than analog circuits. This is because digital signals are immune to noise and interference, whereas analog signals are susceptible to noise and interference. Additionally, digital circuits are typically smaller and faster than analog circuits.

## Assignment Task 3: Review the development of analog and digital electronic circuits and reflect on own performance.

Electronic circuits can be classified as analog or digital, depending on the type of signal they process. Analog circuits process continuous, varying signals, while digital circuits process discrete, binary signals.

Analog circuits have been in use for longer than digital circuits and are still used in many applications today. However, digital circuits are becoming more prevalent due to their advantages in terms of speed, reliability, and efficiency.

I have had some experience with both types of circuits, and I would say that analog circuits are a bit more challenging to work with but can be more rewarding once you understand them. Digital circuits are generally easier to work with but can sometimes be a bit too predictable.

Overall, I think both types of circuits have their place in electronics, and it’s important to know how to use both of them.

Analog devices and circuits are also more tolerant of mismatches between components than digital devices are. This is because the output of an analog circuit is still a close approximation of the input signal, even if the components are not perfectly matched. Digital circuits, on the other hand, can be completely corrupted by a small mismatch between components.

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