Components
What are electronic components?
An electronic component is a physical entity in an electronic system used to affect movement of electrons. Electronic components have a number of electronic terminals or leads which connect to other electronic components over a wire to create an electronic circuit.
What is a Circuit?
An electronic circuit is a complete course of conductors through which current can travel. Circuits provide a path for the current to flow. To be a circuit, the path must start and end at the same point. In other words, a circuit must form a loop.
Coin Cell
Coin cells are single cells that are used to power small portable electronic devices such as wristwatches, pocket calculators, artificial cardiac pacemakers, implantable cardiac defibrillators, automobile keyless entry transmitters, and hearing aids.
9V Battery
It is a common size of the battery that was introduced for the early transistor radios. This type is commonly used in walkie-talkies, clocks and smoke detectors.
Jumper Wires
Jumper wires are simply wires that have connector pins at each end, allowing them to be used to connect two points to each other without soldering. Jumper wires are typically used with breadboards and other prototyping tools in order to make it easy to change a circuit as needed. Jumper wires typically come in three versions: male to male, male to female and female to female.
Male to Male
Jumper Wire
Male to Female
Jumper Wire
Female to Female
Jumper Wire
Diode
A diode is defined as a two-terminal electronic component that only conducts current in one direction (so long as it is operated within a specified voltage level). An ideal diode will have zero resistance in one direction, and infinite resistance in the reverse direction.
Capacitor
A capacitor is a device that stores electrical energy in an electric field. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance. The standard unit of capacitance is called the farad, which is abbreviated F.
LED (Light Emitting Diode)
A light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material.
Resistor
Resistor is an electrical component that reduces the electric current. The resistor's ability to reduce the current is called resistance and is measured in units of ohms (symbol: Ω). The resistor's resistance limits the flow of electrons through a circuit. Resistors come in a variety of shapes and sizes.
Resistor Colour Code Chart
The following colour code chart is used to calculate the value of resistance of a resistor. All resistors follow a colour coded pattern as shown in the adjacent image.
How to Calculate Resistance of a Resistor?
Resistance = 1st band value (first digit) 2nd band value (second digit) multiplied by multiplier value of 3rd band.
= 1st band 2nd band x 3rd band (Multiplier)
= 22 x 10 Ω (ohms)
= 220 Ω (ohms)
Assessment
All teachers must mandatorily answer the following questions to complete the course. Kindly fill out all the form given below.
DID YOU KNOW
9-volt batteries can be dangerous. The positive and negative posts are close together. If a metal object touches the two posts of a 9-volt battery, it can cause a short circuit. This can make enough heat to start a fire.
Capacitors discharge very slowly, but many can store a charge for years.
The smallest size resistor is the 0201 package which measures a tiny 0.6mm x 0.30mm.
Things you can do
Find out the different types of batteries available and find out the reason behind the codes given to the different batteries.
Try to make a battery using a potato.