We supply power to the circuit. Through a normally closed contact, the current will flow through the coil winding and through the secondary winding of the transformer. The relay will break the contact, the power supply to the circuit will stop. The contact immediately closes - the relay coil and the transformer are energized again. The relay will open the contact again.
Category: Electronics
Test. How to check the battery? How to choose the best?
Which of them will show itself better during operation? Probably the one that costs more. And if we compare one price category? I would like to have the highest quality product for less money.
Vintage appliances. What were they
Photo of old appliances from the beginning and middle of the 20th century.
Living and dead water Homemade device
Description of the home-made scheme of the device for the preparation of living and dead water. Photo and video.
How to find out the real capacity of the battery?
The capacity that battery manufacturers write is impressive: 6000mAh, 10000mAh, 20000mAh ... In fact, the real capacity of such batteries does not exceed 3500mAh. And this is the best!!! Cheap copies rarely have a capacity of more than 1000 mAh.
How to make a DVB-T2 digital antenna
To make an antenna for receiving digital T2 format, you can use the proposed scheme. Surely many readers have already made a similar design and will confirm that it is assembled simply and quickly. And the reception quality is excellent.
How to make a night vision device with your own hands
If you really need a night vision device, a simple modification is not necessary to spend a lot of money on a factory one. If you are able to find all the items listed below and you have 1 hour of free time - try to assemble the simplest night vision device with your own hands!
Test of circuit breakers with a current of 1.45 of the nominal. Who is better?
All of us, when buying any product, are interested in how real parameters correspond to the declared characteristics.
This is especially important when we choose devices designed to protect our electrical networks.
Energy saving device. Myth or reality?
To be honest, after such information processing, the hand reached for the phone to place an order.
After all, the number of devices is limited! Suddenly I can't! Somewhere in the back of my mind, I heard the laughter of my TOE teacher. Thirst for freebies almost won over common sense. Moving away from euphoria, I began to analyze the noodles that my uncle had just hung on me from the TV screen:
How to charge a battery without a charger. Two schemes.
If we take a light bulb with a power of 100 W and turn it on without a battery, we will record a current of 0.45A. In a series circuit with a battery, the current will not exceed this value. The internal resistance of the battery is less than 1 ohm. Therefore, we can afford to neglect this value.
Heat-shrink tubing. Installation subtleties.
It would seem ... heat shrink tubing for insulating cable / wire connections is no longer something unusual.
Someone who, and electricians must definitely know how to use it. Nevertheless, the other day I watched the work of the RES brigade and realized: “The instructions are not for our brother.” They screwed up like this...
Car charger from a computer power supply
If you have an unused (but working) computer power supply, then you are almost the owner of a great car charger.