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Every device we rely on, from your home appliances to our traffic control system to the device you're reading this on now, relies on the magic of electrical circuits. Electrical circuits are the foundation for all electronics and understanding their basics is not only essential to anyone learning electronics, but useful to anyone who participates in the modern world. How circuits work can seem like a mystery full of technical terms and complex concepts, but the basics can be broken down in very simple terms. So explore with us: from what circuits are and what they do to how to best learn about circuits. What is a circuit? An electrical circuit is a loop around which electricity moves to give power to the devices that make up the world around us. Imagine your friend has been helping you move, but after lifting so many heavy things, he’s out of energy. There are snacks in the kitchen to refuel, but the way there is blocked by stacks on stacks of boxes. Only by clearing a path to the kitchen and back can you bring him the energy he needs to keep performing the task. Circuits are the same thing: paths that can bring energy to the devices we want to perform various tasks. If we have a power source with a negative and positive end, connecting the two lets us make a direct path from that negative start point to the positive endpoint - allowing the electricity to flow. If circuits sound like a “circle”, that’s because that’s not far off of what they are: simple circuits circle the electricity around themselves, from one end of the power source back to the other. How do electrical circuits work? If there is a path, tiny negatively charged particles called electrons like to move from negatively charged places—places with a lot of electrons—to positively charged places without many electrons. The energy those electrons bring is called electricity. Like stacks of boxes blocking your way to the kitchen, air usually does not allow electricity through easily, so we need the two sides to be connected with a material that does let electricity through easily, which is called a conductor. Metal wires work great for that and form many circuits. What do circuits do? The fact that electrical circuits move energy around lets us bring that energy in (and out) of all the tools we need for a modern world. If you want to have a device do something, like toast your bread or load your emails, you’ll need circuits to give it the power to do so. If a circuit is complete, meaning there is an unbroken path from start to finish, electricity will flow through each part of the circuit, including any connected devices. Those devices then have the power to do what they were meant to, and so your bedside lamp turns on or your electric vehicle starts to move. It can take a lot of imagination — and centuries of human innovation — to figure out all the practical applications we can get out of circuits, but discovering those endless possibilities is the most fun part! What makes up an electrical circuit? Electrical circuits are usually comprised of three key components: A "path” made of conductive material that the electric current easily travels along, such as wire or etches in a circuit board. A "source" of electrical power that gives the circuit electrical energy, such as batteries or a wall outlet A "load”, made up of the device or devices that use that electrical power to operate such as lamps or motors attribution: Image by brgfx on Freepik What do circuit symbols mean? An essential tool in the journey to understanding circuits will be the ability to read the circuit language. We’ll start you off with the most basic - ones you’ll see in almost any circuit. The first represents a power source, like a battery. With a larger line representing the positive end (or terminal) and a smaller line representing the negative terminal, the power source is usually the start and endpoint of the electrical circuit. The second represents a resistor, something on the circuit where electricity will still flow through, but it struggles more than it would in conductors like wires. Why would we want to use a resistor if it restricts the flow of electricity and even uses up electrical energy? One of the main reasons is that a lot of materials do cool things when they resist electricity, like producing light or heat. From toasters to light bulbs, devices that heat or light up often “use” electricity by resisting it. The last we’re going to talk about for now is a switch, represented by a place in the circuit where the lines don’t connect. When the switch is “off”, the circuit is open, which means there isn’t a path for the electricity to get to where it wants to go. No power is moving through and none of the devices on the way will work. Flip the switch and the circuit closes, giving the electricity a complete path to get to where it needs to go and powering the devices again. There’s a lot more to learn about electrical circuits and the ways we understand or draw them, from voltage to alternating current versus direct current to so much more - but we believe in letting you learn with your hands as much as with your eyes, so let’s get your hands on them. attribution: Image by brgfx on Freepik How to learn about electronics or electrical circuits: Explanations are nice, but the best and most engaging way to really understand circuits is to play around them. EIM Technology provides numerous kits and accompanying guides to walk you through not just how to assemble basic circuits, but the principles at play in each one. With step by step instructions, these projects work great for all skill levels, from beginner to advanced, and most excitingly, will show you that you’re learning when the lights turn on or the motors start to move. What electrical circuits can do is a lot of fun, so make learning about them fun too! We have carefully designed an experimental learning kit, including manual and tools, to coach you from introductory to intermediate level familiarity with electrical circuits: Basic Electric Circuits At the end of a long day of moving things, you and your friend have finished all the snacks and are exhausted. “Maybe one day, someone will invent a robot that does this for us,” your friend jokes. With your budding journey into the world of circuits and how to use them to power all sorts of useful tools, you think maybe that person could be you. Continue that journey with our other posts on different types of circuits, transistors, and resistance Or make that journey an engaging, self guided exploration with kits that suit any level. Happy learning! Check our collections: For electronics learning kit >> DIY Learning Kits For Electronics testing >> Instruments & Testing Tools For Sensor Modules / Hardware Modules >> Accessories & Boards

What is Ohm's Law? Ohm's Law, a cornerstone in the field of electronics, establishes the crucial relationship between voltage, current, and resistance within an electrical circuit. This principle, encapsulated in the equation V = I x R holds as much importance to electronics students as Einstein's Relativity theory does to physicists. In the simplest of terms, Ohm's Law posits that the voltage (V) is the product of the current (I) and the resistance (R). This can also be expressed as volts equals amps multiplied by ohms, or V = A x Ω This principle has been named after its proposer, the celebrated German physicist Georg Ohm (1789-1854). Ohm's Law elucidates the fundamental quantities in play within circuits: voltage, current, and resistance. Importance of Ohm's Law in understanding electrical circuits Ohm's Law plays an indispensable role in understanding electrical circuits. It establishes the basic relationship among the three primary electrical properties: voltage, current, and resistance. This understanding is fundamental to the analysis, design, and troubleshooting of any electrical circuit. In essence, Ohm's Law is a fundamental tool in the electrical and electronics field. It provides a solid foundation for understanding how electricity works and how to safely and efficiently manipulate it in practical applications. Ohms Law Calculation: Mathematical equation and its components - voltage, current, and resistance Ohm's Law is an essential mathematical principle in the field of electrical and electronic engineering. It is represented as V= I x R To understand the formula further, here's a breakdown of these components: 1. V (Voltage): This is the force that propels the electric charge through a circuit. It's the energy per unit charge and is measured in volts (V). 2. I (Current): Current refers to the flow of electric charge, or put simply, the rate at which charge is moving. It is measured in amperes or amps (A). 3. R (Resistance): This property opposes or resists the flow of electrical current in a circuit. It is measured in ohms (Ω). The relationship between voltage, current, and resistance Ohm's Law describes the relationship between voltage, current, and resistance in an electric circuit: the current is directly proportional to the voltage and inversely proportional to the resistance, assuming a constant temperature. This means that if the voltage increases, the current increases, and if the resistance increases, the current decreases. The figure below is referred to as the Ohm’s Law Triangle and it is used to visualize the mathematical relationship between the three. Here's how to read the triangle: 1. If you want to find voltage (V), you cover up V in the triangle, leaving you with I (current) next to R (resistance). This tells you that voltage is equal to current multiplied by resistance V = I x R 2. If you want to find the current (I), you cover up I, leaving you with E over R. This tells you that current is equal to voltage divided by resistance I = V/R 3. If you want to find resistance (R), you cover up R, leaving you with E over I. This tells you that resistance is equal to voltage divided by current R = V/I Practical applications of Ohm's Law Ohm's Law has numerous practical applications, such as: 1. Analysis and Design: Ohm's Law is used to design electronic circuits and systems by helping engineers or technicians determine the correct values for voltage, current, or resistance needed in a circuit to achieve their desired output. This is vital in the design of different devices such as resistors, capacitors, transistors, and integrated circuits, among others. 2. Troubleshooting: When a circuit isn’t working as expected, Ohm's Law can be used to identify and fix the problem. By understanding the relationship between voltage, current, and resistance, one can diagnose whether the issue lies in an excess or lack of voltage, an incorrect level of current, or an improper amount of resistance. 3. Power Calculation: Ohm's Law, in conjunction with the power law, can be used to calculate the power consumed by a device or a component in a circuit. This is essential in designing power supplies or choosing the correct components to handle the power in a circuit. 4. Safety: Understanding Ohm's Law is crucial for safety reasons. It allows one to calculate the amount of current that will flow in a circuit for a given voltage and resistance, helping to prevent electrical shocks or fires. Understanding Resistance Electrical resistance, measured in ohms (Ω), is a property that quantifies how a material opposes or hinders the flow of electrical current. Factors affecting resistance The resistance of a conductor is influenced by several factors: 1. Material: The atomic structure of different materials can either facilitate or obstruct the flow of electrons. Metals like copper and silver, which have low resistance, are good conductors, while high-resistance materials like rubber and glass are good insulators. 2. Length: The longer the conductor, the greater the resistance, as electrons encounter more opposition over a longer distance. 3. Cross-sectional Area: A larger cross-sectional area lowers resistance by providing more space for electron flow. 4. Temperature: For most materials, resistance increases with temperature. More thermal energy causes atoms to vibrate more, leading to more collisions and hindering electron flow. The effect of resistance on current and voltage Resistance directly impacts both current and voltage within a circuit, as defined by Ohm's Law (V = I x R). 1. Current: With a constant voltage, an increase in resistance leads to a decrease in current, as there is more opposition to the flow of electrons. 2. Voltage: With a constant current, an increase in resistance results in an increase in voltage, as more force is needed to push the same amount of current through the circuit. In our Electronics Learning kit - "Basic Electric Circuits" we have broken down the electric circuits concepts in a much simpler way with practical application. This comprehensive kit is designed to enhance electronics education by offering structured learning, hands-on experimentation, and critical thinking development. EIM Technology Basic Electronic Learning Kit Introduction to Simple Circuits A simple electrical circuit, or a basic circuit, primarily consists of three components: a power source (such as a battery), a load (like a light bulb or a resistor that works using the electricity), and a conductive path (wires that connect the power source to the load). The power source provides the force or voltage that makes the electric charge or current flow through the circuit. The current leaves the positive terminal of the power source, moves through the conductive path, does work at the load, like lighting a bulb, and returns to the negative terminal of the power source, thereby completing the circuit. Resistance plays a pivotal role in controlling the flow of current in a simple circuit. A resistor, which is a common load in a circuit, uses the property of resistance to limit the flow of electric current to a safe and useful level. In the context of Ohm's Law, resistance determines how much current will flow through the circuit for a given voltage. If the resistance is high, the current will be low, and vice versa. This helps in preventing overloaded or short circuits, thus ensuring the safe and efficient operation of the circuit. In a nutshell, Ohm's Law, represented by the equation V = I x R, forms the cornerstone of electrical and electronic engineering, defining the relationship between voltage (V), current (I), and resistance (R). Resistance is a property that impedes the flow of electrical current and is affected by factors such as the material, length, cross-sectional area of the conductor, and temperature. Simple circuits, comprising a power source, a load, and a conductive path, function based on these principles. The role of resistance in such circuits is crucial, as it controls the current flow to ensure safety and efficiency. For anyone studying or working in the field of electronics, understanding these concepts is of paramount importance. Ohm's Law is applied frequently to design, analyze, and troubleshoot circuits. Knowledge of resistance and how it affects current and voltage is vital in ensuring the safe and efficient operation of electronic devices. Furthermore, the principles of simple circuits serve as a foundation, aiding the understanding of more complex electronic systems. In essence, these concepts are fundamental tools that aid in the effective manipulation and control of electricity in practical applications. EIM Technology's Basic Electric Circuits Kit The Basic Electric Circuit Kit from EIM Technology is a robust educational tool that combines structured learning and hands-on experimentation. This kit includes essential electronic components, a solderless breadboard, and a comprehensive lab manual that covers everything from fundamental circuit concepts to complex topics like Ohm's Law and resistance. This kit is fully compatible with our very own portable & rechargeable electronic lab, Lab-on-the-Go. Users can construct and test circuits, deepening their understanding of how changes in voltage, current, and resistance affect circuit behavior. The lab manual supports this practical exploration, guiding users through a range of experiments and demonstrating real-world applications of these principles. Available for purchase on EIM Technology's website, this kit provides invaluable hands-on experience, reinforcing theoretical understanding and fostering practical skills in both educational and professional settings. Check our blogs: https://www.eimtechnology.com/blogs Related blog topic: https://www.eimtechnology.com/post/electrical-circuits-what-is-a-electrical-circuit-how-do-circuits-work EIM Technology shop (Store): https://shop.eimtechnology.com/ EIM Technology Support (Technical Features of the Products): https://support.eimtechnology.com/ EIM Technology Learning Center: https://doc.eimtechnology.com/

What are Kirchhoff's Laws? Kirchhoff's Laws, named after the German physicist Gustav Kirchhoff, are fundamental principles in the field of electrical engineering that describe the relationship between current and voltage in electrical circuits. These laws, known as Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL), form the backbone of circuit analysis. Simply put, KCL states that the total current entering a junction or node in a circuit must equal the total current leaving it, while KVL states that the total voltage around any closed loop or mesh in a circuit must equal zero. Kirchhoff's Laws have wide-ranging applications in our day-to-day lives. From the functioning of the electronic devices we use daily, like our phones, to larger systems like the electrical grids that power entire cities, Kirchhoff's Laws play a key role. Understanding these laws can help us grasp how our modern world functions. Whether you're an aspiring engineer, a curious hobbyist, or simply a lifelong learner, getting familiar with Kirchhoff's Laws offers valuable insights into the world around us. Kirchhoff's Current Law (KCL) Kirchhoff's Current Law, also known as the first of Kirchhoff's Laws, states that the total current entering a junction or node in an electrical circuit must equal the total current leaving it. In simpler terms, what goes in must come out. This law is based on the principle of conservation of electric charge, which means that electric charge can neither be created nor destroyed. Currents Entering the Node = Currents Leaving the Node Let’s consider a simple example to better understand this law. In the figure below, we have a node in a circuit with three connected branches carrying the three currents I1, I2, and I3. The currents I1 and I2 are flowing into the node and I3 is flowing out. According to KCL, I1 + I2 = I3. This rule applies no matter how many currents are flowing in and out of a node. For example, we have a node below in a circuit with five branches carrying the currents I1, I2, I3, I4, and I5. The currents I1 and I3 are flowing into the node while the rest are flowing out. According to KCL, I1 + I3 = I2 + I4 + I5. In real life, KCL has various applications. It is used in designing and analyzing complex electrical circuits, such as those found in our electronic devices. For instance, engineers use KCL in determining the current distribution in multiple paths of power supply circuitry in a laptop or smartphone to ensure they function properly. One common mistake in applying KCL is forgetting that the current direction matters. We have to remember that currents flowing into the node are considered positive, and those flowing out are considered negative or vice versa, based on your initial assumption. Another mistake is not taking into account all the currents entering or leaving a node, which may lead to an incorrect analysis of the circuit. Kirchhoff's Voltage Law (KVL) Kirchhoff's Voltage Law, also known as the second of Kirchhoff's Laws, states that the sum of the voltages around any closed loop or mesh in a network is always equal to zero. This is because a circuit loop is a closed conducting path, so no energy is lost. In real-world applications, KVL is used in just about every electronic device you can think of. From designing complex circuitry in telecommunication devices to troubleshooting electrical problems in automotive systems, KVL is a powerful tool for engineers and technicians alike. For instance, in household electrical wiring, KVL can help identify whether there is a short circuit in the system. One common error when applying KVL is not keeping track of the polarity of voltages. While traveling around a circuit loop, it is essential to add voltages that rise (going from minus to plus) and subtract voltages that drop (going from plus to minus). Another mistake is not considering all the voltages in a loop, especially when the loop contains multiple elements like batteries and resistors. Comparing KCL and KVL Similarities Both Kirchhoff's Current Law and Voltage Law are fundamental principles in the field of electrical and electronic engineering and are based on the conservation laws - KCL on the conservation of charge and KVL on the conservation of energy. Both laws are used for circuit analysis to find unknown currents and voltages, and both apply to any type of circuit - DC, AC, linear, non-linear, simple, or complex. Differences While both laws have similarities, they focus on different aspects of electrical circuits. KCL deals with the current flowing into and out of a junction in a circuit. It is based on the principle that the amount of current entering a node must equal the amount leaving it. On the other hand, KVL deals with the voltage around a closed loop in a circuit. It states that the total voltage supplied in a loop must equal the total voltage drop across the loop. When to Use KCL or KVL The decision to use KCL or KVL depends on the specifics of the problem at hand. KCL is often useful for analyzing current in parallel circuits and at junction points in complex networks. KVL, on the other hand, is commonly used for voltage analysis in series circuits and closed loops. In many cases, both laws are used together to solve complex circuit problems. These laws are especially powerful when used in conjunction with Ohm's Law, allowing for a comprehensive analysis of electric circuits. Key Takeaways Understanding Kirchhoff's Laws, specifically Kirchhoff's Current Law and Kirchhoff's Voltage Law is essential for anyone interested in the field of electrical engineering or simply seeking to understand the electrical world around us. Kirchhoff's Current Law teaches us that currents in a circuit are always conserved at any node or junction, providing a vital rule for analyzing current flow through complex networks. On the other hand, Kirchhoff's Voltage Law ensures that the total voltage in a closed loop remains constant, offering a powerful tool for voltage analysis in various circuits. The importance of these laws lies not only in their academic and theoretical value but also in their wide-ranging real-world applications. From designing electronic devices to troubleshooting electrical systems, these fundamental laws of physics are at the heart of our electrified world. Remember, while these laws might seem challenging at first, with practice and patience, anyone can master the art of circuit analysis using Kirchhoff's Laws. EIM Technology's Basic Electrical Circuit Kit At EIM Technology, we understand that learning about electrical circuits can be a daunting task. That's why we've developed our "Basic Electric Circuits" Electronics Learning Kit. This comprehensive kit simplifies the complex concepts of electric circuits and presents them in an engaging and practical way. One of the key features of our kit is the easy-to-understand explanation of Kirchoff's laws, accompanied by hands-on exercises that allow learners to apply these laws in real time, thereby providing a complete understanding of these fundamental principles. Our goal is to make learning about electric circuits accessible and enjoyable for everyone. The "Basic Electric Circuits" Electronics Learning Kit is available for purchase on our website: https://shop.eimtechnology.com/collections/all-products/products/basic-electric-circuits Dive into the electrifying world of circuits with EIM Technology and simplify your learning journey! References Recommended Books and Articles https://ieeexplore.ieee.org/abstract/document/4909474 Useful Online Resources for Learning and Practice https://byjus.com/physics/kirchhoffs-law/

FAQs (Frequently Asked Questions) Welcome to our FAQ page, where we address common questions and provide helpful information about our products and services. We understand that you may have queries regarding orders, shipping, warranties, returns, and more. What are electronic building kits for adults? Electronic building kits for adults are educational and recreational packages that include electronic components, circuit boards, and instructions to build various electronic projects. These kits are designed to help learners of all ages explore electronics, programming, and circuit design in a hands-on and enjoyable way. EIM Technology offers an extensive collection of Project Based Learning Electronics Kits, Electronic Equipment, Laboratory Tools, Electronic Devices, Electronic Tutorials, and more. Find our products on our store page. What types of projects can I build? Our electronic building kits offer a wide range of project possibilities, including home automation systems, weather stations, LED displays, synthesizers, electronic games, wireless communication devices, and more. Different kits can be upgraded and used together. The projects vary depending on the type of kit you choose. For example, our Smart Greenhouse Learning Kit guides learners through the following electronics concepts and sub-projects: # Fundamentals of the Greenhouse effect # Analog sensors circuitry # Basic thermodynamics # Motor control circuits # Op-amp and 555 timer basics You can find the full range of available projects on our products page. Do your products come with warranty? Yes. Our products come with warranty. The warranty period ranges from one to two years depending on the product. For any other warranty or customer service questions, reach out to us via our website chat/form or write us at info@eimtechnology.com.

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Our Mission Our mission is to empower aspiring electronics enthusiasts with comprehensive and accessible learning solutions that are tailored to facilitate understanding and skill development, even for those with limited technical experience and resources. We’re committed to providing quality products and engaging learning contents. We believe the most effective learning comes from your own hands-on experience. About EIM Technology EIM Technology is an edtech company that specializes in making the world of electronics and technology engaging and accessible for beginners at the start of their journey. Our hands-on kits, tutorials, and resources are intuitively designed for ease of understanding, providing a welcoming entry point into complex subjects. Aspiring hobbyists and makers, both teens and adults, will find our materials tailored to their needs, ensuring that their first steps of learning are pleasant and supported. With a focus on practical knowledge and skills development, we maintain a dynamic support community and regularly update open-source materials, positioning ourselves as a trusted partner to empower future generations of engineers and tech visionaries. Why choose EIM Technology? For aspiring electronics enthusiasts and students seeking a practical and engaging way to learn, EIM Technology presents comprehensive learning kits tailored for beginners at all levels. Move beyond the confines of purely theoretical online courses or disjointed hardware tinkering. Our electronics-focused kits are thoughtfully designed to blend essential theoretical knowledge with immediate hands-on experimentation. This tangible approach to learning is not only beginner-friendly but also endorsed by a diverse community of learners, esteemed technology instructors, and certified engineers. Our Value At EIM Technology, we believe that learning electronics and technology is not a privilege, but a fundamental right that should be accessible to all. Our business is built upon this principle, aiming to dismantle the barriers that impede eager beginners from engaging in this field. The value we offer is encapsulated in the accessibility, affordability, and comprehensiveness of our solutions. We understand that for novices, the world of electronics can be daunting, riddled with high costs, complex information, and a steep learning curve. It is our mission to simplify this journey, offering a clear pathway through which beginners can embark on their learning experience with confidence. By providing cost-effective, user-friendly, and all-encompassing learning kits, we empower individuals to start their venture into electronics with the tools they need and the support they deserve. Our dedication to creating an inclusive learning environment extends beyond mere products; it is about nurturing a culture where every aspiring learner has the opportunity to become a creator, innovator, and contributor in the field of technology. EIM Technology stands as a beacon for those who wish to start their journey in electronics, ensuring that every step taken is a step towards democratizing technology education and enabling the explorers of today to become the problem-solvers of tomorrow. Our Story I'm Daniel Cao, the founder of EIM. As I'm writing this, we're closing in on the end of 2023. Time flies, but I can still clearly remember the rush of excitement and the overwhelming sense of achievement that our small team felt five years ago when we saw the first pre-orders roll in for our very first crowdfunding campaign for our first baby product MEGO. Believe it or not, this was already 14 months after we had made the decision to form a startup team (with my peers Terrence and David in research lab), during which time we had virtually no income. This rented factory corner, where we worked, lived and toiled, was where our dreams began to take physical shape. Amidst the buzz of machinery and the smell of solder, our first prototypes were born, each component meticulously placed by hopeful, determined hands. My partners and myself were all from technical backgrounds. Honestly, we didn't start with a clear-cut outlook or a sounding business plan. The inception of EIM Technology was purely driven by our passion for technology and education, and a simple yet sloppy goal: to develop some user-friendly products to facilitate research work, and if possible, sell to those folks in our neighbor labs or departments. In fact, the genesis of this idea was rooted in the practical challenges of my thesis research, which often involved lugging around heavy and cumbersome instruments to various labs in chemistry, biology, and health science. These labs typically lacked specialized electronic equipment, though occasionally, they might need just a basic power supply or some simple sensor circuitry to gather preliminary data. Leveraging my expertise, I made a compact, pocket-sized portable power supply (the version-0.1 of MEGO) and some electronic modules, which I brought to these labs instead of relying on expensive, million-dollar apparatus. I realized these minimalist designs sparked considerable admiration among my peer researchers, who expressed a keen interest in acquiring some foundational tech skills. This was an eye-opener for me. By hosting a couple of club evenets and workshops, I realized a broader interest in electronics existed outside the technical sphere, hindered by a lack of knowledge and high equipment costs. As someone who has been a student, engineer, and educator, along with a great team that shared the same zeal, I believed that our experience could genuinely help those who wanted to understand electronics. Consequently, our focus shifted to creating user-friendly, cost-effective devices, simplifying electronics for a wider audience. Our new mission bore fruit with the creation of MEGO , Zoolark , and Lab-On-The-Go , alongside a knowledge platform with a list of project-based tutorials and learning kits tailored to foster hands-on experience and understanding in the field. Contact Unit 180-6660 Garybar Rd, Richmond, BC, V6W 1H9 +1 (778) 297-6888 info@eimtechnology.com