Thanks to LED lighting, nowadays we are able to use smartphones with very well-lit screens, LED monitors and TVs, Blu-ray players, as well as many other technological marvels which are part of our everyday lives. The LED light bulbs use around 80% less electrical energy compared to all other types…
LED flood lights are extremely popular, convenient and easy to use source of light which can be used in many spaces and areas such as parks, stadiums, playgrounds, home yards, commercial and public buildings and more. They are very popular light solution also because they can provide large quantities of bright…
The installation of electrical sockets is seemingly easy task, but it has its peculiarities, which if ignored, may cause failure or even an accident. Very often the electrical socket has a scheme printed on a small piece of paper that begins with the words: „The installation must be carried out…
Graetz circuit is a two half-period rectifier. It is used for rectifying alternating voltage when consumer with constant voltage has to be powered. It consists of four diodes connected in series by two. If you mentally divide the diodes in two pairs D1 – D3 and D2 and D4, the…
Two-way switches are used when we need to switch on and off a lamp from two places. This switch is also called switch „scheme 6“, unlike the ordinary light switch, which is called key „scheme 1“. Examples of the use of two-way switches are hallways, stairs or bedrooms – you…
There is hardly a product in our daily lives with such a variety of shapes, sizes and functions. Computer speakers have undergone a great evolution since their creation and from a simple tool for sound recording computer configurations they became a design challenge with unique colors, patterns and power. They…
We know many types of technical sprays and lubricants that are used daily in households, industry, aviation and shipbuilding. Without being exhaustive, we will list the most used and popular worldwide technical sprays and lubricants. To be most useful, we will start with the problem and then identify the most…
How are thermometers invented? Like most inventions, the thermometer wasn’t invented in a day and by just one person. It is assumed that the first attempts to connect the warming of a body with a fluid, which increases its volume in a cylindrical container, was made by the ancient Greek…
Equipment required: Router – it may have a built-in switch and/or Wi-Fi, a switch (commutator), Wi-Fi (access point / hotspot) FTP or UTP cable, RJ-45 connectors. We will discuss a case, in which we want to give Internet access to a few neighbors and share the bill. The Internet supplier…
Car batteries, even when they are not used, they self-discharge over time. Car batteries have a standard level of natural self-discharge and it says that battery discharge, without having a consumer connected to it, should not exceed 1% per day. This self-discharge is due to several chemical and physical reasons,…
