Lior Elazary KK6BWA

...because this life is yours. Some of it was given to you, the rest you make yourself.

  • Increase font size
  • Default font size
  • Decrease font size

Introduction to microcontrollers and electronics

E-mail Print PDF

Introduction to microcontrollers and electronics


Basic Electronics


Electricity is the movement of electrons. Electrons create charge, which we can harness to do work. Your light-bulb, your stereo, your phone, etc., are all harnessing the movement of the electrons in order to do work. They all operate using the same basic power source: the movement of electrons.

There are three basic principles to electricity

  • Voltage is the difference in charge between two points. (The pressure)
  • Current is the rate at which charge is flowing.  (Flow)
  • Resistance is a material’s tendency to resist the flow of charge (current).


Basic Electrical Components

Battery - converts chemical energy into electricity

Resistors - Resists the flow of electricity

Capacitors - Stores electrons in an electric field

Inductors - Stores electrons in a magnetic field

Diodes - Only allows electrons to flow in one direction


Ohm's Law


Using Ohm's law to check the max current in the circuit.

LED specs: -2V and 20mA or 0.02A Max


Building the Circuit



Resistors in parallel and series



Using a microcontroller

Using a microcontroller to control an LED


Using a microcontroller to control a speaker



Connecting the 8x8 LED matrix



Last Updated on Saturday, 25 October 2014 14:38