Photovoltaic panels aren’t the only way to produce electrical energy from Sun. In this post will be shown the thermal solar energy.
Introduction to machine vision
How machines and robots see? This post’s subject is an introduction to machine vision. It is very used in industrial machines and robots.
News: New dwarf planet discovered
A new dwarf planet has been discovered beyond Pluto’s orbit, it name is Goblin.
Jet fighter generations
This post subject are all jet fighter generations, your features and electronic systems used. This term appear in 1990.
Antennas (Part 2)
This is the second part of antennas. Will be shown other parameters and some types of antennas.
Bypass and ladder for fishes in dams
The ladder for fishes is a construction which reduces environmental impact caused by hydro power plants and it is this post’s subject.
Voltage multiplier circuits
In this post will be shown how it is possible to produce high voltages only with diodes and capacitors. These circuits are the voltage multipliers.
News: first train moved by hydrogen
The first train moved by hydrogen is ready and enters in operation in Germany.
Basic concepts of alternate current (AC)
Meeting requests, the subject is about basic concepts of AC. Has been already mentioned AC in the post about electromagnetism, this post will go deeper.
50 and 60 Hz, what is the difference?
Why some countries adopt 60 Hz electrical energy and others 50 Hz and what is the difference between the two frequencies? It is this post’s subject.

