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Making an electric pencil for engraving


Everyone knows that graphite is installed in the pencil, which transmits current well. This property can be used to create an electric pencil, thanks to which it is possible to easily engrave on knives and other conductive surfaces.

We recommend starting production by watching the author’s video



So we need:
- an ordinary pencil;
- a piece of wire;
- a piece of wire with a crocodile at the end;
- a piece of wire with a plug;
- a bulb with a cartridge;
- latex gloves;
- any surface on which we will apply the drawing.


The author draws a picture on a stainless knife, but as we said above, any conductive material can be used. Let's turn to turning an ordinary pencil into an electric one. To do this, at the end of the pencil you need to connect the wire to graphite. To do this, remove the eraser and drill it in the center with a thin drill.

Then we pass the wire through the drilled eraser, having previously exposed the tip of the wire.

It is also necessary to sharpen the pencil a little in the area where the wire is connected, so that the latter touches better with graphite.

Putting the pencil back by installing the eraser with the wire in its place.


The main work is done. Now you can take care of the correct connection of the electric pencil. The wire that comes from the pencil is connected to one terminal of the bulb.

We connect one wire coming from the plug to the second output of the bulb.

A wire on which there is a crocodile is connected to the second wire from the plug.

The pencil works as follows. To apply the picture, you need to connect the crocodile to the item that will be engraved, be sure to wear rubber gloves and connect the plug to the power source. In order not to spoil the surface, you can apply the future drawing with an ordinary pencil.


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33 commentary
To put a knot - not fate, probably. shok
Did you forget the cosine phi? Bugaga. boss
Eh, KorolevJan correctly said!
Dmitry, not 220v, but 230v (like in Europe). So in order to transfer power to a teapot of 1.5 kW at 230 V, a current of 6.5 A is needed. And at U = 12 V it is already necessary 125 A. And for such a large current, what wire is needed? Only copper 25 squares (mm2). And thinner and aluminum will be heated instead of a teapot with water ... And this is a loss. You pay on the counter, but you don’t boil water yes
And there is an iron, a washer, etc.
It was good 220v. It was worse in the Americas - 120v and the wires are correspondingly thicker.
Ha, I also have such an article.
and I’m interested in something else, why are so health-conscious states that supply voltage to apartments as much as 220V with a life-threatening current?
Why can’t you give 12V or 50 at least .... the truth then you have to install boost converters in different equipment ... Well, or fundamentally change the principle of operation of the equipment, the same electric kettle ...

But it all awaits us apparently in the distant future ... As old people, we will remember that we lived near death ...))
Quote: Guest Denis
Without this, you are 99% likely to be electrocuted.
The probability of death here, of course, is much less than that indicated by you, but the probability of even 1% cannot be considered acceptable.
Guest Denis
I would like to correct you, not "very dangerous", but deadly, and household gloves will not save you. There must be at least TESTED DIELECTRIC GLOVES and a SEPARATE TRANSFORMER. Without this, you are 99% likely to be electrocuted.
It’s not necessary to reduce everything to black and white only, the world is bright and multicolored.
I support! Sometimes, when you need to come up with something, I recall that I have already seen something similar, it seems "Imdmyself.com", i.e. notion starts from scratch.
A very long time ago I read from one English inventor the expression: "think with your hands."
Quote: Cyril 517
Is direct or alternating current needed? Yes, and what power?

Not direct, but permanent. ;)
The author has a variable, but he does not regulate it, which is bad. In addition, the photo shows the left hand without a glove, and this very dangerous!
It is much better to take a constant voltage source with adjustable voltage and current and select a mode for metal and pencil. I once, about 20 years ago, made inscriptions using a laboratory source with parameters of about 30 V to 2 A. And you can connect the wire to the stylus just by making an incision at the top of the pencil so that it reaches the stylus, and then wind the wire. If you need to make a lot of inscriptions, it is probably better to adapt the car pen and solder the wire to the collet tube.
And thanks to this lesson, I was able to go to this site!) And let’s taken from YouTube ... there’s so much information on the Internet now that sometimes you’re looking, looking, but you won’t find the right one ..
And anyway ... Why do you, (as I mentioned) so painfully have a topic of your leadership? You are building a sort of Guru out of yourself, who gives everyone marks. (But who needs them, after all! You just tell me that YOURS are wrong!). After all, as I also mentioned, some people here simply do not have experience! At 25, I also made many mistakes that I see here. So instead of immediately attacking a person and accusing him of stupidity, simply point out these errors without any emotional coloring. And then constantly about the "Aikyu", "Kings in the head", etc.That is, if a person does not know something, or made a mistake - he is already stupid !! And you yourself - have you always done everything correctly?

For example, your so-called "dryer". After all, in fact, you built a "pus" and an "incubator for Drosophila" in one device ... Because, when constructing it, you did not know the principles of drying at all.
And what, in your opinion, in my comments I should have immediately called you "without a king in my head", etc. ??? .... Here I will give YOUR comments below that are perfect for this homemade product of yours:

"Here is another" creation "

"I advise you, before you invent a" bicycle ", study the question. Do not make people laugh.

"You did not think about it, for this you need to think at least a little."

I would never give comments in this tone (And I didn’t) ... Because I am discussing home-made products and not their authors ...

Have you come here to assert yourself?
To clarify means to make clear, not to state a fact.

From times- + clear, further from praslav. * (j) ěsnъ, from cat. among other things occurred: dr. Russian., - glory. ꙗснъ (dr. Greek. αἴθριος), ашіашніати "make clear", Russian. clear,


Value

make clear, explain, explain ◆


: winked: Well, everything is fine here (with me). What does it mean "EXPLAIN)? It means" cranks "there is an undeniable opinion and further postscripts are not important (the word itself determines everything). If you express your opinion on this matter (then you can be mistaken), and not state it as an indisputable fact ( I EXPLAIN.) Somewhere like that, for the gifted. smile
Here's the note: You deliberately took the phrase out of context: Because in the next phrase I just emphasized that I, too, could be wrong: "And an intelligent person always has the opportunity to understand for himself who is right - the author of the homemade product, or the one who saw the mistakes. (Maybe I'm wrong) ...
Do you mean you think your comments are undeniable (judging by the statement)?
And you naturally cannot be mistaken? You don’t have to argue, are you always right? DO YOU EXPLAIN?
Yes ... apparently we don’t understand ... I don’t need to argue with anyone. I'm not going to give ratings to anyone. I just say that it’s not right if I see this. I tell someone who did not notice them. Because everyone has mistakes. It’s impossible to know everything. (I also once made tiles without a vibrating table)))) Now I already know everything about tiles, but this does not give me the right to evaluate the author of that article, and, especially, to scold or mock him somehow talking about it ... I just EXPLAIN mistakes. I suggest.
And an intelligent person always has the opportunity to understand for himself who is right - the author of the homemade product, or the one who saw the mistakes. (Maybe I'm wrong) ...
Kmril. Drawings of the box can exist only for serial crossbows with the same bows. Read my article about crossbow, I told you there - the bed is made under the bow! When the bow is ready, you can understand what size bed you will have. Because the length of the guides and the type of trigger depends on the bow. And from this - all other linear dimensions ...
: winked: Valery! Rather, we cannot understand each other. Do you prefer writing your opinion when the author cannot “parry” him or explain his position? But the "smart" himself must draw conclusions from our conclusions? Like a conversation with a deaf-mute, you always have priority.
Cyril 517, I do not recommend such an installation. Firstly, it is not safe. Secondly it is "dirty" (the picture is not beautiful). Read on the internet about etching inscriptions. It is more interesting and practical. And also there are special devices operating from a conventional step-down transformer for engraving.
And can you show me the drawings of the crossbow box?
Is direct or alternating current needed? Yes, and what power?
No, I don’t think so ... But I believe that our tips are needed for those who, on the contrary, have read here wants to do something.(Although no one bothers you to follow the link and leave a comment there. For me personally, this is not necessary. I'm not there, I'm here.))))
And "trust us right away" is not required. In general, what does “believe or disbelieve” have to do with it .. Such a choice will only arise for those whom you call “without a king in your head” - stupid copyists who want to repeat but don’t understand the essence ... For a smart person, the comment will simply turn attention to what you should think about .. Because homemade products involve the manufacture of something, without having the slightest experience in it, based only on spatial thinking and ingenuity. And something may come out that you either didn’t know about, or simply didn’t think about ... And someone was already in a similar situation, albeit “on a different turn of the spiral” and indicated to you with his comment that “this could get it. Take into account! "
Do you like subscribing to dozens of sites or looking for Old on the Internet? I do not, and others too. It is much better to subscribe to one trusted site and make sure that someone posts interesting things, how others will discuss it, etc.

Similarly, news resources, where it is easier and easier to subscribe to one resource and read news than to climb numerous.

The whole point of such resources and journalism is to CONVENIENTLY provide information to the consumer. And this resource successfully copes with this task.

In addition to changing the structure of texts (on some resources they are not readable at all), some also rewrite articles in general from other languages.
Valery, do you really think that someone who finds an interesting article (for him) on the site (of another) will “explode” to look for our site? In order to know our opinion about this? And even if he finds it, he will believe us right away? Are we all "experts" here ?!
: winked:

Dmitrij! Why do you always “think” for me, what I have been thinking about all my life, what kind of genius am I (if you understand anything at all in genius)? I don’t have cars, then ideas? Young or what?
You see, it’s a little different here .... Those who are “with the king” will never watch and do the same. They will look, and, perhaps, will notice some idea, some decision .... And they will make their own. But, given the important points, peeped at someone else's experience. Indeed, you must admit, when you implement any thought-out project a thousand times, at the final stage some "rake" that has stepped out comes out ... Here are some of these "rakes" and you can look at someone else's experience ...
And who is "without a king", he stupidly copies !!! Interrogating exact sizes. (Sometimes it comes to the point of absurdity! I was asked to draw a drawing of a crossbow lodge with the exact dimensions ... Or, maybe you remember, they asked me what size self-tapping screws should be used when assembling THIS wooden structure ....)
So, they are stupidly copying. But you yourself saw how many “pearls” are sometimes exhibited by people who have something “cheers, it turned out !!!” . So we indicate in the comments on these points, so that those who cannot analyze, copying, do not repeat them !!!! For this, and comments, but not for the author .... The author, perhaps, this bathhouse itself has collapsed, and the screed cracked and froze. Therefore, he himself understood everything ..... Or didn’t understand, but explains it with bad "fake" materials, as they like ....
So that’s the point that we’re not just “duplicating”, but discussing and supplementing, directing in the right direction, advising how best, etc. This is a normal discussion. Otherwise, the dialogue will not work, everyone will just say “wow!”, “Cool!”, “Class!” etc. And this is no longer interesting: winked:

Every idea has an author, you certainly should know, he will find his idea here, and here such valuable advice - that’s good smile
I said that I am against these sites (where the author himself suggests). I mean, why are we duplicating them here, and most importantly discussing with foam at the mouth? To whom do we prove and what? Those who do not have a "king" or an author (who does not even "hear")? So such (without a king), as a rule, are stubborn and will still do their own thing, while always being confident in their rightness.
To the deeds, you there probably have been thinking all your life how to attach a magnet to a screwdriver or make a dog a booth. Oh great genius! Yes, and whining about any of its mediocrity that ideas are stolen from you. : wink:

And the author +, homemade cool, at least developing for amateur craftsmen. But a 220V source is dangerous, it is better to use 6-12V from some kind of converter. But if not ... you can, but be careful.
This is not the most nonsense, more delusional are eliminated. There are few truly unique ideas - there are also worthy authors, some are too lazy, others are afraid to "burn" the idea, etc.

Yes, it’s allowed to add from other sites, but what's wrong with that? they were also made by people.

In your judgment, does it make sense from such sites? Who with his hands and the “king in his head” will come up with everything himself? You are wrong - not all of them are “ingenious,” many people need an idea (albeit delusional) to push off from it and come up with their own. It is they who need such sites.
: winked: If you read a little higher ... "", then I want to ask, but can any nonsense be published here? We collect here from all sites, discuss ?! Like peas against a wall, who needs it? To the author, is he not? Whoever decides to repeat this, so he will figure it out (if with the "king" in his head). And if without, then speaking is useless. This is generally about everything, and not specifically about this "engraver."

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