LIGHT EMITTING DIODES
To identify the anode and cathode, pay close attention to the legs of the LED. The shorter leg usually represents the cathode. However, it is better to look out for the flat spot of the LED. The leg closer to the flat spot represents the cathode.
This component is useful in providing indication for your project. For example, lighting up when a successful connection is made between Xbees.
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ResistorsResistors are passive components which have no polarity (no anode or cathode differentiation). This electrical resistance is measured in ohms and can be calculated using Ohm's Law.
Resistors can be fixed or variable. Fixed resistors
The resistance of these resistors can be determined using the colour coding or a multimeter.
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Capacitors
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Inductor
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Useful platforms
The above just provides a basic overview of the common components you will come across. It is encouraged for you to read more to further your understanding.
Additionally, here are some useful platforms to help you in designing or testing your circuit.
Additionally, here are some useful platforms to help you in designing or testing your circuit.
Fritzing
This platform is particularly useful if you have components such as the Arduino and various sensors. An advantage to this platform is the large library available online. If a component (e.g. BYJ48 motor) is unavailable in the existing library, you may search for it online and have it included in your library! Additionally it has a breadboard/schematic/PCB view which would help you visualize and consider how you will intend to adjust the layout of your components. |
DoCircuits
This platform allows you to build and test run the circuit you have created. It is useful in helping you deepen your understanding on circuitry and components. Also, there is a work flow panel on the right to help guide you in building your circuit. Do remember that your Ammeter (measures current) should be in series while the Voltmeter (measures voltage) should be in parallel. |
Graphical Resistor Calculator
If you would like to double check your resistance value (without using a multimeter although it would be more accurate), try using this site. |
USEFUL LINKS
The links below were referenced in creating the summary above, do refer to them for further details.
- Light emitting diodes (LED)
https://en.wikipedia.org/wiki/Light-emitting_diode - Resistors
https://learn.sparkfun.com/tutorials/resistors - Ohm's Law
http://www.physicsclassroom.com/class/circuits/Lesson-3/Ohm-s-Law - Capacitors
https://learn.sparkfun.com/tutorials/capacitors - Inductors
http://electronics.howstuffworks.com/inductor.htm