In this post I will talk about rare earth, fundamental elements to modern technologies.
Electronic muscle
Traditionally the actuators which move robots are electrical motors, but these aren’t the only way to move robots, an alternative are the electronic muscle, which are this post’s subject.
Arduino tutorial (Part 3)
In the third part of this tutorial, I will show how to use servomotors and new commands. This post has been updated.
Does cellphone causes cancer?
Cellphone causes cancer. Urban legend or scientific fact? It is the subject of this post.
What is plasmonics?
In this post, I will show the plasmonics. It is an emerging field that leads with plasmons, which are electron waves generated by light.
How to generate energy from garbage?
One of the greatest environmental problems today is the big quantity of garbage produced currently. It is a great idea to transform all those garbage in energy due to big demand of electrical energy. How to generate energy from waste is this post’s subject.
Introduction to artificial neural networks
In this post I will give an introduction about what artificial neural networks are, how they work and your applications.
Arduino tutorial (Part 2)
The second part of Arduino tutorial series will show how to implement digital inputs, use buttons, and analog inputs to use sensors. Click in the following button to see the first part of the tutorial and understand the introductory concepts.
Mobile communication generations
You have already heard of terms like 3G and 4G referring to wireless mobile communication. What it is mean? In this post I will explain all the four mobile telephone generations.
LCD construction
In this post I will explain how the LCD are made. Click in the following button to see the post about the working of LCD.
LCDClick hereMaterials
Here are the materials that compose the LCD.
The liquid crystal stays between two polymer layers, the LCD’s glass is coated with silicon dioxide to polarize the light and it is made of borosilicate to avoid the ions to modify the electrical field and consequently the crystal’s alignment, the silicate dioxide is to stop the passage of ions. Transparent electrodes are made with a layer of indium tin oxide and lithography (I will create a post about this process with more details).
Manufacturing mode
To make a LCD, first you have to wash, polishing and cut in the right size. The polishing is made with this process.
The glass must be cut with a diamond saw.
After that the glass is coated with silicon dioxide. The next step is to put the transparent electrodes in the glass substrate and for that you must coat it with indium tin oxide, put a photoresistive layer above and use a mask to apply the photolithography process, similar to the process of manufacture chips.
The next step is use a polymer film of polyamide to coat the substrate with electrode to align the liquid crystal with the substrate. Then the liquid crystal is finally injected between two substrates, the LCD cell should have between 5 to 25 micrometers. Finally build the electronic circuit to control the LCD.
