Description:
Resistors are components that restrict the flow of electricity in a circuit, which in turn reduces voltage and current.
In other terms, a resistor limits the flow of electrical current through a circuit.
How it works:
A resistor uses up some of a circuit's current and converts it into heat. It does this by giving the electricity a longer, thinner, and slightly less conductive path to travel. Resistors are used in all kinds of circuits, from helping LEDs keep from burning out, to adjusting the frequency of a radio signal.
Resistors follow Ohm's Law, which describes the relationship between voltage (V), current (I), and resistance (R), expressed as V = IR. The resistance value of a resistor is measured in ohms (Ω).
Connect it:
A resistor has two wire leads, and should be connected in series with the device it's meant to support. Resistors are not polarized, which means you can connect them either way around and they will work the same.
Resistors can be connected in two main configurations:
Series Circuits: When connected in series, resistors are placed end-to-end, so the same current flows through each resistor. The total resistance is the sum of individual resistances.
Parallel Circuits: When connected in parallel, resistors are placed side by side. The voltage is the same across each resistor, and the total resistance is less than the smallest individual resistance.
How it is used:
Select the device to edit its name and resistance.
Current Limiting: Resistors are commonly used to limit the current flowing through LEDs, preventing them from burning out.
Voltage Dividers: Resistors can be arranged in a voltage divider configuration to create a specific voltage level from a higher voltage source. This is done by connecting two resistors in series, using the voltage across one of them as the desired output.
Get Started:
Drag the starter circuit below into your design for a working example of how to use this part.
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More About Resistor:
To add a resistor in Tinkercad, search for "resistor" in the component library, drag it onto your breadboard, and connect its terminals with wires to other components in your circuit. You can then click on the resistor to set its specific resistance value in ohms.
A resistor is a passive electronic component used to limit current, divide voltage, or dissipate power in a circuit. There are several types of resistors, each designed for specific applications. The most common types include carbon composition, metal film, wire-wound, thick film, and surface-mount resistors (SMD). Each type differs in material, tolerance, stability, and noise characteristics. Resistors are defined by several key specifications, including their resistance value, measured in ohms (Ω), which determines how much they resist the flow of current. Another important specification is the power rating, usually measured in watts (W), which indicates how much heat the resistor can safely dissipate without damage; common ratings range from 1/8W to several watts, depending on size and type. Resistors also have a tolerance, typically ranging from ±0.1% to ±10%, indicating the accuracy of the stated resistance. Working temperature ranges usually span from -55°C to +155°C or more, depending on the resistor type and quality. Additionally, maximum working voltage is specified to prevent dielectric breakdown, and temperature coefficient (in ppm/°C) tells how much resistance changes with temperature.
Recommended Websites for Learning About Resistors:
1. Website Title: Learnabout Electronics – Resistors
Website URL: https://www.learnabout-electronics.org
URL recommended for (Reason): A highly educational, beginner-friendly resource covering resistor basics, types, color codes, series/parallel circuits, and practical applications with clear visuals and explanations.
2. Website Title: SparkFun Learn – Resistors Tutorial
Website URL: https://learn.sparkfun.com/tutorials/resistors/all
URL recommended for (Reason): Great for hobbyists and makers, this tutorial explains resistor function, types, color codes, and use in real-world circuits with hands-on examples.
3. Website Title: Electronics Tutorials – Resistors
Website URL: https://www.electronics-tutorials.ws/resistor/res_1.html
URL recommended for (Reason): A solid theoretical foundation covering Ohm’s Law, resistor characteristics, and formulas—ideal for learners seeking strong academic-style explanations.
4. Website Title: EPCI Academy – Resistor Basics & Technologies
Website URL: https://epci-academy.com/courses/resistors-basics-technologies
URL recommended for (Reason): Offers professional-level content, including a full course and technical ebook on resistor technologies, materials, performance, and failure modes—ideal for engineers and advanced learners.
5. Website Title: Power4All – Complete Resistor Guide
Website URL: https://power4all.in/Resistor.php
URL recommended for (Reason): A comprehensive, all-in-one resistor guide covering fundamentals, formulas, resistor color codes, configurations, and troubleshooting tips for students and hobbyists.
6. Website Title: EEWeb – Basic Resistor Tutorial
Website URL: https://www.eeweb.com/basic-tutorial-about-resistors
URL recommended for (Reason): A concise and accessible overview of resistors, including definitions, uses, and classifications—great for quick reference or review.
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TinkerCAD Circuits Platform related Interesting Links:
TinkerCAD Circuits Reference Handbook eBook: About Page
Quickly Master Electronics with the TinkerCAD Circuits Reference Handbook
…till next post, bye-bye & take care.
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