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Let's begin by learning about: Electricity, Voltage and Resistance
Electricity is the movement of electrons. The movement of electrons create charge. A circuit is a closed loop that allows charge to move from one place to another. When we build circuits, we control this charge and use it to operate that we harness to light a lightbulb, operate a radio, phone, and other items dependent on electricity to work.
Voltage is the difference in charge between two points.
Current is the rate at which charge is flowing.
Resistance is a material's tendency to resist the flow of charge (current).
Georg Ohm was a Bavarian scientist who studied electricity. Ohm's law describes the relationship between current, voltage, and resistance. The amount of steady current through a large number of materials is directly proportional to the potential difference, or voltage, across the materials. Ohm's law is expressed mathematically as V/I = R See this video that explains Ohm's Law.
Resource: SparkFun provides a tutorial that further explains voltage, current, reistance and Ohm's Law.
This introductory video will help you learn the difference between open/closed circuits, and how a switch changes the flow of the electric current.
In this second video, the teacher uses simulation software to show how electrons flow through both circuit types: series and parallel electrical circuits.
What is a circuit diagram? A circuit diagram (also known as an electrical diagram, elementary diagram, or electronic schematic) is a simplified graphical representation of an electrical circuit. ... The diagram does not show the physical arrangement of components.
Parallel Circuit Diagram
Parallel Circuit Diagram
This image on the far left shows the circuit arrangement using wires, two light bulbs, a switch and a power source (in this case it is a battery). The schematic diagram to the left uses the symbols for the light bulbs and a switch and the power source. Look below for other symbols that can be used when creating your circuit diagrams.
Creating a Circuit Diagram
Creating a Circuit Diagram
Use these charts when creating diagrams of circuits
Is there a computer program that can be used to help one create a circuit diagram? Yes! visit https://www.circuit-diagram.org/
Multimeter
Multimeter
When preparing your project for competition, you will be asked to use this multimeter to measure voltage, amperage, and resistance. This instrument measures the electric potential difference between two points in an electric circuit (voltage) and the current in the circuit (amperage). Electric currents are measured in amperes (A). Resistance is an electrical quantity that measures how the device or material reduces the electric current flow through it. The resistance is measured in units of ohms (Ω). Visit the KidWind video library to learn more about how to use multimeters.
Learn more about circuits from Tinkercad: Tinkercad Circuits!
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