Lesson 1 (Introduction)
Makers universe is a magical place, where everyone has access to knowledge and the only actual prerequisite is the desire to create.
In the following video you may see some astonishing creations with Raspberry Pi or Arduino.
All electronic devices operation is based on how electrons move. We are all made by them, but it somehow difficult sometimes to visualize them. In the following video we can get a clue. Electrons are located on the circle in the end of the video.
In the following image(*) we can see a sketch of how they orbit around the atom kernel.
Electrons move very fast. When we managed to control their movement, we started creating all these nice electronics devices.
To push the electrons we need voltage. We get voltage from a battery. The more volts a battery has, the more powerful it can be and the stronger it can push the electrons.
Electrons need a path to move. Usually we use cables for this reason.
So, if we connect a battery on the two edges of a cable, then the electrons will begin to run. If we use this movement effectively we can do a lot of things.
For example, see below.
Electrons begin from the one battery cable, they go to the resistor, they go to the LED, they turn it on and they end up to the other battery cable, starting over again.
Resistor seems peculiar. What is it actually?
Resistor helps us to protect our circuit. Without it, electrons would travel very fast and they could burn it. So we need something to slow them down. This is what the resistor is for.
We could observe as well that electrons leave the battery, they return to it and they leave it again. We will never meet a functioning circuit without a closed loop. It is very helpful to discover these loops when we see a circuit. Thus, we will understand better its operation.
This white thing in the right? This is a breadboard.
Breadboard helps us to position our electronic elements in order to create circuits.
Let’s see the next image
Lines on breadboard are like small cables. Placing two elements on the same line is like connecting them with a cable.
Assemble the above circuit and see the LED turning on. You should use a 100 Ohm resistor.
Your journey to electronics worls has just begun!
Estimated duration: 50 minutes
(*) Image from https://pixabay.com/el/%CE%AC%CF%84%CE%BF%CE%BC%CE%BF-%CF%87%CE%B7%CE%BC%CE%B5%CE%AF%CE%B1-%CE%B5%CF%80%CE%B9%CF%83%CF%84%CE%AE%CE%BC%CE%B7-%CE%BC%CE%BF%CE%BD%CF%84%CE%AD%CE%BB%CE%BF-1674878/