At the very beginning of the topic, regarding the selection of a quenching capacitor, we consider a circuit consisting of a resistor and a capacitor connected in series to a network. Let us consider from a practical point of view the question of selecting a quenching capacitor for inclusion in the AC network of a load designed for a voltage lower than the standard mains voltage.

Suppose we have a 100 W incandescent lamp designed for a voltage of 36 volts, and for some incredible reason we need to power it from a 220 volt household network. Having such a capacitor, we gain hope to get a normal glow of the lamp, we hope that at least it will not burn out. This approach, when we proceed from the effective value of the current, is acceptable for active loads, such as a lamp or heater. But what if the load is non-linear and connected through a diode bridge? Let's say you need to charge lead acid ...

The function of uninterruptible power supply (UPS, UPS - Uninterruptible power supply) for a computer is to provide for some time a continuous supply of electricity to your computer and peripheral devices in the event that the power supply for some reason has disappeared or the voltage in it has become much less than acceptable .

The problem does not apply to laptops, tablets, smartphones, because they have built-in batteries. But the computer does not have a built-in battery, so additional measures are needed. This is necessary so that you do not lose unsaved information, being in an instant without electricity (the monitor went out sharply and that’s all), so that you have the elementary opportunity to shut down normally and turn off the computer in normal mode without unnecessary stress for you in a few minutes and without risks to the equipment. How to choose an uninterruptible power supply ...

First of all, it is necessary to find out the following details: the expected temperature range of measurements, the required accuracy, whether the sensor will be located inside the medium (if not, a radiation thermometer will be needed), the conditions are assumed normal or aggressive, is the possibility of periodic dismantling of the sensor important, and finally, is it necessary graduation is in degrees or it is acceptable to receive a signal, which will then be converted into a temperature value.

These are not idle questions, answering which the consumer gets the opportunity to choose for himself a more suitable temperature sensor with which his equipment will work in the best way. Of course, one cannot simply and unequivocally answer the question of which temperature sensor is better, the choice remains to be made to the consumer, having previously familiarized himself with the features of each type of sensor ...

The life of a modern person is hard to imagine without electricity. In everyday life, many different electrical appliances and electronic devices are used that make life comfortable and allow solving various problems. At a picnic or on a camping trip, the question arises of where to get electricity in nature, because even far away from civilization, modern man cannot do without a number of electrical appliances and devices.

We will not give tips on how to get electricity from wood, fruits, natural materials, etc. - these methods will fit only as an experiment showing the presence of minimal potential. We are only interested in reliable and proven methods that will provide power to electrical appliances for the required period of time.If you need to use various gadgets in nature, photo, video and audio equipment ...

Let's look at an example of a sequence of steps to select a controller. First of all, through search engines, for example, Yandex and Google, I collect information on all charge controllers that online stores offer in the country. Of course, I draw attention to the proposals in my region. If prices including delivery in the home region are comparable to prices in other areas of the country, I take such suggestions into account. If they are "transcendental" - I do not consider at all.

In my situation, there were no such offers nearby and my choice was somewhat “facilitated”. I will not give examples of stores that fell into my field of view, so that, God forbid, not impose my subjective opinion, moreover, do not provoke you to make a mistake if, suddenly, my choice is not correct. I will say only one thing. In any case, before placing an order you should have ...

I was prompted to write today's article by the fact that from time to time the question stubbornly continues to sound: What is better to use as an alternative source of electrical energy, a wind generator, solar panels? I am sure that for those who already consider themselves to be “alternative people” with experience, a similar question “cuts the ear”.

Indeed, in order to feel the answer to it one should at least a couple of years bit by bit such coveted Watts. Seriously speaking, this is tantamount to the question: What is the best way to use a hydroelectric power station or a thermoelectric power station? Where there is a river and its flow makes it possible to use a hydroelectric power station, the choice is obvious if only because its kilowatt will be cheaper. Well, where there is no river, it remains to put a thermal power plant. Of course, each of the options is able to satisfy the fulfillment of assigned tasks under certain specific conditions ...

In this article, under the correct operation of lithium-ion batteries, we will understand the observance of such conditions in which the lithium-ion battery of a portable device can work safely, will last a long time, and the functioning of the device will remain full. It will be about lithium-ion batteries, since most modern mobile gadgets: tablets, laptops, smartphones, etc. have lithium batteries installed. And if earlier it was often possible to meet nickel-metal hydride, nickel-cadmium, today lithium is widely used.

With proper use, a lithium-ion battery will last 10-15 times longer than when used haphazardly, which will be described later in the text. Here you will find recommendations for users, compliance with which will help to keep the lithium battery efficient and capacious throughout the entire period of use ...

Often, before carrying out any excavation work, or even for the purpose of servicing a cable laid underground, it is necessary to find this cable. Agree, it will be very annoying to damage the cable laid underground, for example by hooking it with an excavator bucket or accidentally drilling it. In order to avoid such incidents, you must first obtain reliable information about the location of the cable underground, the same applies to underground communication pipelines.

If the information about the location of the cable laid underground is not reliable or insufficiently accurate, then unnecessary costs and errors are inevitable, and such errors are sometimes fraught with dire consequences for health and even for people's lives.The condition of underground cables can be assessed by route locators, but sometimes it is necessary to localize the cable underground to further conduct ...