Build days

How to take readings from the electric meter OS EMOS-2

Oct 28, 2021

Elena asks: Hello, I am renting a private house. Here is an old counter OS EMOS 2 with an hour dial and five values. There is a comma after the fou...

Bipolar transistors: device, principle of operation, switching circuits

Oct 28, 2021

The word "transistor" is made up of the words TRANSfer and resISTOR - resistance converter. It replaced lamps in the early 1950s. It is a three-lea...

The nominal value of the difavtomat is less than the nominal value of the input automaton

Oct 28, 2021

So what kind of stove will it be? If there is a line under it, then perhaps it is on it and there is a difavtomat. You either need to check with th...

The circuit breaker does not turn off at short circuit - reasons

Oct 28, 2021

Hello! With a short circuit on a "bad" outlet, nothing happens - only sparks on the wires that I short-circuit. AB does not work, the outlet is sti...

Why is it dangerous to use a transformerless power supply for low-voltage devices

Oct 28, 2021

The question is answered: Alexander MyasoedovWho said that is unacceptable? Can. But:In this case, the galvanic isolation of the device, which is p...

Types of solders for soldering, their application and purpose

Oct 28, 2021

To create a sealed, reliable connection of metal parts, soldering is most often used. The essence of the process lies in the bonding of materials w...

Everything in the office is shocked: what to do and where to look for the problem

Oct 28, 2021

Olga asks: Hello! In the office, it shocks from everything: a chair, a wall, a microwave oven, flowers... During the day, constantly, got up from t...

Calculation of the power regulator for infrared heaters

Oct 28, 2021

The question is answered: Alexander MyasoedovHello! It is necessary to add up the power, do you want from one regulator or from different ones? Are...

The light blinks when a powerful load is turned on - what to do

Oct 28, 2021

The question is answered: Alexander MyasoedovGood afternoon light blinking in all rooms? Does it blink like when the load is turned on, and then it...

Knocks out the difavtomat when the load is connected to one of the sockets

Oct 28, 2021

The question is answered: Alexander MyasoedovHello! The sockets are not connected to the 20A machines, they may already be on, but the machine will...