⭐Electric Current Flow
⭐Electric Current Flow
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What will we learn here? (click me)
What will we learn here? (click me)
When it comes to electronics, understanding how current flows is very important to build circuits that work!
If you wire wrongly, sometimes things may go wrong 💥 (but hey, that's part of the fun 😁)
Today, we will learn:
How Electric Current Flows ⚡
Where are the + and - terminals on Arduino ➕ ➖
Lighting up 1 Blue LED with 3.3V coin battery, wires and crocodile clips 🐊
What do we need for this Tutorial?
1 Arduino Uno board and USB cable
2 M-M Jumper wires
3 Blue 5mm LEDs
2 Crocodile clips
3.3V Coin battery
DC motor (optional)
Try this #1: Coin battery and LED
Try this #1: Coin battery and LED
Challenge 1: How do you light up the Blue LED with coin battery?
3.3V Coin Battery
Blue LED
💡 Click for answer (try by yourself first!)
💡 Click for answer (try by yourself first!)
You have to put the LED's short leg on the negative(-) side, and long leg on the positive(+) side of the coin battery: https://photos.app.goo.gl/A7aypB7Hq2LkTgRGA
Try this #2: Light up the LED with Arduino
Try this #2: Light up the LED with Arduino
Arduino Uno, connected to your Laptop
x2 20cm M-M Wire
x2 Crocodile Clip
x1 Blue LED
Challenge 2:
Using above materials + these 2 Arduino pins (3.3V, GND) try to light up the Blue LED.
💡 Click for answer (no cheating, try by yourself first!)
💡 Click for answer (no cheating, try by yourself first!)
Picture answer here: [pic coming soon, left my croc clips in office!]
- Ok, what's going on? What is current? ⚡
I am sure you have done the above experiment in primary school. See any relation?
You surely can guess what happens when you take off a wire from the circuit.
The light bulb stops working because the circuit is broken.
But if the circuit is complete, conventional current can flow from + to -, powering the light bulb along the way in the circuit.
Image credit: https://xaktly.com/Resistance.html
Imagine electric current ⚡ being like water current 🌊
Current is the Rate of Flow of Electricity.
🌊 You can imagine electric current flow to be similar like water current flow.
Electric current flows through conductive material (eg: metal wire, carbon, salt water, you google it)
For now just remember: Conventional Current Flows from Positive Terminal (+) to Negative Terminal (-).
2. How does current flow in Arduino circuit? ⚡
2. How does current flow in Arduino circuit? ⚡
Image credit: https://kayky.weebly.com/light-bulb.html
Conventional current flows from + to -
Batteries always have ➕ and ➖ symbol.
Challenge: Can you guess where is the Positive (+) and Negative (-) Terminal for electricity on your Uno?
Answer as in image! Just remember that GND/ Ground is negative (-), And the rest are usually positive.
So, what are the keypoints that we have learnt today 😉?
Extra challenge: Can you turn on your DC motor (use 5V pin)?
With that, we will learn more about circuits in the next tutorial, Breadboards!
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