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Objective: Master the flow of electricity and learn to build circuits on a breadboard.


1. The Big Three: Voltage, Current, and Resistance

Presentation:

SC_02_Electricity a general Introduction by Infinite Engineers

Before touching the hardware, students must understand how electricity moves. Think of it like water flowing through a pipe:

  • Voltage ($V$): The “pressure” pushing the electricity.
  • Current ($I$): The actual “flow” of electricity.
  • Resistance ($R$): The “narrowing” of the pipe that slows the flow down.

2. Component Identification

Show the students the following items from their kits:

  • LED (Light Emitting Diode): The “light bulb.” Remember: The long leg is Positive ($+$) and the short leg is Negative ($-$).
  • Resistor: Used to protect the LED from too much current. We will use the 1K Ohm resistor.
  • Buzzer: Converts electricity into sound.
  • Push Button/Switch: A “bridge” that completes or breaks the circuit.

3. Breadboard Anatomy

Presentation:

SC_03_Circuit without wires by Infinite Engineers

A breadboard allows us to build circuits without permanent soldering.

  • Power Rails: The long vertical lines on the sides (usually marked $+$ and $-$) are connected all the way down.
  • Terminal Strips: The horizontal rows in the middle are connected in groups of five.

4. Hands-on Experiment: The Manual LED Circuit

Students will build their very first physical circuit.

Step-by-Step Instructions:

  1. Power: Connect the 9V battery to the power rails of the breadboard using a battery snapper.
  2. The Switch: Place the 4-pin switch across the middle divider of the breadboard.
  3. The Protection: Connect one leg of the 1K resistor to the positive rail and the other leg to the switch.
  4. The LED: Connect the long leg (Anode) of the LED to the switch and the short leg (Cathode) to the negative rail.
  5. Test: Press the button. The LED should glow!

5. Troubleshooting Tips for Students

  • Polarity: If the LED doesn’t light up, try flipping it around. LEDs only work in one direction.
  • Loose Wires: Ensure the jumper wires are pushed firmly into the breadboard holes.
  • Battery Check: Ensure the battery snapper is tightly clipped to the battery.

Required Materials for this Session

MaterialQuantity
Breadboard 1
9V Battery & Snapper 1 each
LED (Assorted) 1
1K Ohm Resistor 1
4-pin Switch 1
Jumper Wires (M to M) 3-4