Master classes:
Reliable laboratory power supply
I have an adjustable power supply. Only voltage is regulated; accordingly, there is no current adjustment. For some purposes it is enough. I decided to assemble a unit with adjustable current and voltage. Laboratory power supply, then LBP, very
Super fast microwave chips
Suddenly I wanted crunchy chips, but didn’t I want to go to the store? I bet I'll make chips faster than you go to the store to buy some? Do not believe? I'll make super fast chips in the microwave in less than 10 minutes!
How to make a night vision device
Hello! This composition is on my table. And what do you think is all this for? Yes, yes, I decided to assemble a night vision device. Say to watch owls at night. It seems to me very interesting.
The easiest tool for sharpening knives at 30 degrees
I continue to sharpen the knife. I already showed my homemade device to make descents (tapering surfaces of the blade). At the same time he made a polishing disc, stitching several discs together so as not to diverge. Next was the task of sharpening
100 Watt do-it-yourself lamp
Powerful over bright LED light sources have now become popular and available. The advantages of LEDs are that their service life is much longer - up to 20,000 hours, and not for 1,000 hours like ordinary incandescent lamps. Also led modules
LED acoustic flasher
On the Internet there are many different schemes of LED flashing lights - simple, complex, with and without microcircuits. But now you won’t surprise anyone with an ordinary flashing LED, so there is a need to assemble something more advanced. For example,
Powerful linear voltage regulator
To power various electronic devices and do-it-yourself circuits, you need such a power source, the output voltage of which can be regulated over a wide range. With its help, you can observe how the circuit behaves with one or another
New handle for an old knife
Today I will tell you how to make a new handle for an old knife, if the native handle fell apart. I had a pair of shoe knives, one of which had a cracked handle and split into two halves.
How to eliminate the runout of a cartridge in a screwdriver
Sometimes there is a problem of the runout of the cartridge in a screwdriver or drill. The tool was presented or it was bought a long time ago, the defect was not noticed on time, there is no check and no claim can be made. And working with such a screwdriver is very difficult or impossible. I AM
Flush Detector
Quite often, residents of apartment buildings need to fix a picture, a hanger, a shelf, or some other piece of furniture on the wall of an apartment. To do this, mark a point on the wall and drill a small hole
The shield of the Vikings and Slavs do it yourself
Hello, ladies and gentlemen, today we’ll talk about a round shield that was used by both our ancestors - the Slavs and the northern Scandinavian warriors known to the whole world - the Vikings. I want to say right away that this is not a reconstruction, i.e. way to create
Simple 12V LED tube lamp
Probably, many faced a problem when you choose to spend the night in nature, and it’s dark around, because the light from the fire is not enough for a modern person to feel comfortable. For these purposes, you can make LED
Battery trash desulfator
Hello! It is quite possible to make the simplest desulphator of old and unnecessary things in about 15 minutes, unless of course you know what and what to do. Any normal radio amateur, for any, has a lot of all kinds of electronic trash. And if you scratch on
How to make a hole in hardened steel without drilling
In such a simple way, you can make not only a round hole in red-hot steel, but also a hole of any other shape in without too much effort. The chemical method will help you out and facilitate the task. The method does not require expensive chemicals, all
How to make a flying ball
A flying balloon is perfect for any holiday event. Typically, purchased flying balls are filled with light volatile gas such as helium. At home, it is almost impossible to get such gas without special equipment. But helium is not
The most reliable relay for turn signals
As you know, all modern cars are equipped with direction indicators, which are a light or LED flashing on the left or right side of the body. Sometimes a standard electromechanical relay fails, and get a powerful
Block Masonry
A homemade device was invented to simplify the laying of cinder blocks. In the absence of experience, it is quite difficult to maintain the same seam line in thickness. Therefore, we constantly had to remove cinder blocks, toss or level the solution layer. FROM
DIY waterproofing the foundation
Building your own home is not easy. Especially if you are not a professional, do not own complete knowledge, do not wield tools so cleverly. And the first time you build a house. I think there are many such entry-level masters. But not
Homemade hydroelectric power station from an old washing machine
I was always attracted by getting free energy from natural resources. And somehow, I had the idea to create a simple mini-power plant that would generate electricity from a passing water stream. It all started with an idea
DIY do-it-yourself tripod
One of the benefits of outdoor recreation is cooking on an open fire, which makes ear, kulesh and even plain tea seem incredibly tasty. But it is not always possible to find suitable stones to build a semblance of a hearth. Therefore take light
Bill pig
We are all accustomed to piggy banks in the form of pigs, in which they scrupulously stack money. If you want to accumulate a certain amount for the purchase of the thing you need, then the piggy bank will certainly help. But you have to wait. In the same lesson proposed
How to quickly make a self-locking nut
A self-locking nut is a very useful thing, especially when you need to fix a unit or assembly that is subjected to dynamic loads. A simple connection under the influence of vibration will quickly weaken and begin to unscrew, which is fraught
How to choose a search magnet and what to do with it?
Today, search magnets have become a very popular topic. Such “fishing” attracts not only boys and scrap metal seekers, but also quite respectable and wealthy people. Why is this happening? There is a boy in every man, but traditional
Connecting a three-phase motor according to the star and delta circuit
The conductive windings of the electric motor are displayed in a junction box. The findings of the windings form two parallel rows, each with a marking from the letter C and the numbers from 1 to 6. This is done in order to mark the beginning and end of all three windings.