So when are we going to see the jdh style obsessive build of a computer using only wires and razor blades?

@KO6BXL1

Жыл бұрын

for the transistors he's gonna make his own doped silicon crystals

@jorgesaxon3781

Жыл бұрын

*Ben eater

@anon_y_mousse

Жыл бұрын

@@jorgesaxon3781 Nah, Ben Eater would make it on a breadboard and use a 6502. Whereas jdh would make it out of garbage and chewing gum with wires sticking everywhere.

@star80doessdastuff

Жыл бұрын

jdh moment

@Bleepbleepblorbus

5 ай бұрын

Tf is jdh?

I did the razor blade version back when I was a kid, the article called it a foxhole radio. It used a pencil lead to connect to the razor blade, with the explanation there being that the junction between the steel and graphite provided the diode. (They even recommended an older, rusty blade - heating it like you did would have been a good plan too). I don't know where I got the earpiece, but it needs to be a very sensitive one - normal cheap headphones won't work. But yeah, it was amazing to hear a radio station come through.

@tomclanys

Жыл бұрын

I think you need a piezo earpiece in your radio, so that it's very sensitive to voltage

@PunakiviAddikti

Жыл бұрын

​@@tomclanys That's correct. These earpieces were most commonly used in hearing aid devices and had a 3.5mm jack.

This was really cool to see! Never knew something like this would work without batteries.

Looks like you will need to make another version in 5 years again 😄

@3DSage

Жыл бұрын

I could design a portable enclosed version :)

@modernidiotism9865

Жыл бұрын

@@3DSage for a lesser confusing wiring standard use the european version measured in surface area mm2

@555-xd1fo

Жыл бұрын

​@@3DSagethis is a great project but is so strange 😊

@3DSage

Жыл бұрын

@@555-xd1fo It's ok to be strange sometimes :)

@davidboss2160

Жыл бұрын

@@3DSage is it possible to make a FM radio similar to this?

i have read that this kind of radio was used by soldiers during wars

@3DSage

Жыл бұрын

Very true. They would diy build their own with spare parts.

It's a shame there's so few AM radio frequencies even being used these days. Even FM is slowly being taken over by mobile phone carriers and WiFi. HAM radio recently lost a huge chunk of available frequencies to them, because the government decided to just "take" them and hand them over for 6G mobile phone usage.

@anon_y_mousse

Жыл бұрын

This is definitely one of the negatives of government regulation. They act unilaterally and you have no choice. I'm not sure if there's a solution to that because with no regulation we'd have signals overlapping everywhere, and now we have all these restrictions which make things harder for the little guy and punish them if they step out of bounds.

The heck with your radio, I want that box

@3DSage

Жыл бұрын

It is a nice box! Reminds me of a Zelda treasure box. :)

So happy to see this! Keep up the good work man, your content is awesome.

@3DSage

Жыл бұрын

Keystone Science!! Long time no see! I hope you are doing well. I'm glad you saw my updated video and thanks for the comment.

I need more of these videos!Keep going!

The working of gauge actually make sense once you understand it- it's how far a wire of that gauge and a specific weight (a pound, I think) will stretch without changing it's thickness. It probably became common because it could be measured fairly early in stsndardization.

Wow! Interested Project... Good Luck!

Good video, but when you showed the importance of the diode, you just opened the circuit. No wonder there was no sound. You should have bridged the diode with another wire to show how it would sound without a diode!

@3DSage

Жыл бұрын

I noticed that when editing the video but replacing with a normal wire would cause the same effect. Removing the diode also is to prove the sounds are coming from the printed radio.

Can you make a box for this to be concealed in to cover the wires? And then you could put a diagram of which station is which.

This was great (uh... except your "wiper" was driving me crazy!) Hope to see more.

Nice sense of humor touch!

Nice update 👍

i remember it when i saw it 5 years ago. brought back old memories

@3DSage

Жыл бұрын

It brought back old memories for me too! I found it again and I just had to make a new video :)

@RandoniumTJ

Жыл бұрын

@@3DSage i suggest you could turn an old school rheostat into a foxhole radio... I think it would work far better ....

That's A Cool Lighter.

@FuckignRuby

Жыл бұрын

actually it's quite hot

You can make a more stable connection by making a loop every few turns. Connect a wire to any of the loops to tune the radio. It does mean there is less resolution in the tuning, but it guarantees a solid and stable connection.

Thats so cool!

The coolest part of this project for me is the diode at the end 😂

This is something I did be when I was 10 yrs old. I later became an electrical engineer and worked 46 years in the industry.

@3DSage

Жыл бұрын

wow that's phenomenal! You have so much great experience and got to see computers really evolve over the years. You are awesome! 👍

@SuperFredAZ

Жыл бұрын

@@3DSage thanks, I spent 47 years as an engineer, from early color tv to chips, retired 11 years ago. You might want to show another 10 year old how to do the radio without 3 d printing. A paper towel roll makes a good form for the coil, a small piece of scrap wood to hold everything......

Your videos are so high quality! I'm a big fan of all of your series

@3DSage

Жыл бұрын

That means a lot so thank you for the nice comment!

Especially old "Transistor Radios" rely on basically the exact same coil idea, but have their own amps included. Probably one of the few types of radio that'll survive the end of the world.

@Hellsong89

Жыл бұрын

Given that use, how one makes transmitting version of this. Its fine and dandy to listen but if no one is transmitting its really not useful. This could be good shit hit the fan communication method if it can handle EMP.

@KiraSlith

Жыл бұрын

@@Hellsong89 Well, that's the fun part, you CAN do the same in reverse, you just need the amplifier driving current from a piezoelectric surface (the same earpiece used to receive can also be used as a microphone to transmit) towards the coil instead of away and you can get an (admittedly pretty bad) transmitter. It's the same design principle that led to the "walkie talky". Yeah a hand built one will make lots of noise instead of picking up lots of noise, and as a broadcaster it'll have poor range, but you'll still be audible so it's better than nothing in a disaster. Bigger coils concentrated to a specific frequency start looking more like the modern antenna, combined with stronger amplifiers you get better range at the cost (or maybe benefit?) of spreading your bandwidth occupation.

Very interesting!

Can’t wait for the Dolby DTS version.

*@3DSage* 2:42 Try using Vinegar & Salt, then rub with some paper or similar, it almost instantly removes any oxidation on copper.

@3DSage

Жыл бұрын

Yes I mentioned that in the video and that's a great trick to use! Works great :)

@adamrak7560

Жыл бұрын

@@3DSage With copper, if you heat it up you can dip it into isopropanol. It reacts with the oxides at high temp and reduces it into copper very quickly!

@superslimanoniem4712

3 ай бұрын

​@@adamrak7560same with acetone(vapors). Just turns the oxides straight back into copper! Make sure to cool it down quickly by dipping it into the pool of liquid.

Looks pretty good. I wonder if you can add to this to make it a bit better. like having the Tuner be on two pieces of metal and having a string to move the tuner left and right.

great video should be viral

Reminds me of the "Electronic Playground" I had as a kid, my favourite project was the radio/metal detector

OK that bit about the box cuter blade was cool

Nice

the fact that you need no power to use this make this super cool

It's pretty cool that you can still use that type of radios. here in Germany they killed all the AM radio stations a couple of years ago, i still have some old AM only radios and i build my own but you only can receive some stations from italy and france maybe at night. We only still got the FM Radio but they're also trying to kill it and then i can't hear any radio at all

@3DSage

Жыл бұрын

Sorry to hear that. I didn't know about that. I have been thinking of make a 3D printed FM radio. It's a little more complicated but I can clearly show each step.

@Butterscotch_Beagle

4 ай бұрын

@reapiu8316 They where completely shutdown and then torn appart, the last AM Radio Station was shut down 2016 and since then there is no AM Radio anymore, we still have FM but it's just a question of time when they will also destroy them

@Butterscotch_Beagle

4 ай бұрын

@reapiu8316 This is not so easy, you can make a amatuer ham license then you can send with up to 100W or 750W with the big license but not on broadcasting bands. I don't know if it would be possible to make a private radio station for AM, it's possible for FM but there is a lot of paper stuff you need and it cost a lot of money. I build a small Shortwave Transmitter which has only very low power so it can only be received in my own appartment and not from strangers on the outside but even this is technically not legal because i don't have a license to transmit and it is on the broadcasting band

@Butterscotch_Beagle

4 ай бұрын

@reapiu8316 it's not really a government thing here it's just an econony thing because they want to sell new stuff therefore they shut down the old stations that you can't use the old radios anymore. If you make an private station that costs a lot of money so they get money from you and that's fine then Oficially they want to shut it down because it needs a lot of energy but the new DAB transmitting needs a lot more energy for the same distance, in fact shortwave is the most efficient, with a single station around 100kW in central of germany you could ged through whole germany and even further

What's neat is that it can also power an led off from the radio wave it would just be very dim. But it does work.

Next a proper enclosure to protect it from oxidation.

@sdjhgfkshfswdfhskljh3360

Жыл бұрын

Do you mean vacuum? 🙂

@3DSage

Жыл бұрын

I could make a part 3 video and build a portable design. :)

@ithaca2076

Жыл бұрын

​@@3DSage you should make a small 3d printed pcb with an option to use a battery with it :)

@juango500

Жыл бұрын

@@ithaca2076 if I had the time I would make the slider an old dial with a knob to turn it :)

Ngl with the way it sounds it would be really good for a horror game

Good video 👍👍

@3DSage

Жыл бұрын

Thank you!

Perhaps a pinpoint contact with the edge of the windings is better than the foil based wiper, as that will reduce the likelihood of creating shorted turns as you move it along.

M3 threaded rod on compliant/flexing endmounts instead of the paperclip and a screw to turn it and possibly a small ball-bearing instead of the foil....................

@3DSage

Жыл бұрын

great ideas. That would also work.

I mean this sounds really usefull if you are stranded somewhere, considering it uses no batteries.

@sdjhgfkshfswdfhskljh3360

Жыл бұрын

Small solar panels or hand crank generators are fine too. However it will be not possible to use them without transistors or vacuum tubes, which, sadly can't be made so easily as diodes.

Next up, a potato powered Walkman.

@DollyBoy_1923

Жыл бұрын

Seriously, though some kind of cassette player would be cool!😂

It's very informative

@3DSage

Жыл бұрын

Thank you! :)

@tanmaymondal69

Жыл бұрын

@@3DSage u r welcome brother and please can u make a detailed video on FM receiver

yo nice video. howd you make the visuals?

Would be cool to print a radio that perfectly fits the box in the beginning, like a laptop radio

Hi very good I made this 27 year before on 3 inch wood wounded with different pieces of wires joint together because those days I don't have long wire it works amazing with out antenna and earth. A diode 50 oham internal resistance. And 300 oham high impedance headphone. Also it convert any signals into power.

@adamrak7560

Жыл бұрын

you mean ohm? 50ohm internal resistance diode? That would extremely strange for a silicon diode. Have you used homemade oxide diode? Or germanium diode? (Schottky diode is the best for this, if you have one, it only needs about 0.2V to work, but can do with slightly less)

@rizwanmalik3659

Жыл бұрын

@@adamrak7560 dear in those days i have lot of stock of different old & new components from my father. I tested many many diode and different stuff but only one type diode work very excellent ( it look like in4148 but its colour is green and its internal resistance exact 50 oham). Headphone from airline its impedance 300 ohm . No capacitor, no earth, no antenna used. My concluded after many experiment, different wires joint together and wounded on 3 inch wood pice 1 ich diameter. It tunes automatically natural frequency that catches different frequency and convert into power and signal.

dammm now i feel old, i saw the other radio when it came out...

The electromagnetic spectrum… ISSS JUST A NAMEEEE

1:48 its funny to see that the diode example with the LED because LED stands for Light Emiting Diode, which is funny because the LED is also a diode

My one criticism with this video is that you're effectively saying (0:48) "oscillates back and forth", which to me suggests frequency modulation, i.e. faster and slower along the time axis. When you're talking about amplitude modulation, I think it's far more intuitive to say oscillates up and down. You're not technically wrong, and it's more about what people associate with the description of a "back and forth" movement, and whether people picture that as being along the time axis or perpendicular to that. It's even possible most people here will disagree with me, but I felt that could have been put better.

Very good video, thanks! Where did you get your spring tabs from, please?

@3DSage

Жыл бұрын

search Amazon for 5x9mm springs. The Exact product I bought is: "BronaGrand 150pcs Antiqued Brass Silver Crimp Fasteners Leather Cord Ends Caps Necklace Clasp Jewelry Parts 9x5mm"

@eebaker699

Жыл бұрын

@@3DSage excellent, thank you very much for this information and an amazing project!😁

I just found your Chanel from the original video

You should make a version 3 with a built in amp

you should try to make a transceiver but use a dummy load antenna so no fcc problems

Just use a scotch bright pad. The kind for scrubbing pots.

I just realized that’s the headphone that they used is the danks pod reviewed headphone

Now make an AM transmitter.

@navysealscopypasta9

Жыл бұрын

Using Arduino works well

@mumblety

Жыл бұрын

@@navysealscopypasta9 Really? I might have to try that!

Hey, i'm gonna try that soon but i have some questions: 1. What are the dimensions of the 3d printed parts? [I currently don't have my laptop with me so i can't try if the pieces would fir in my 3d printer in the slicer software]. 2. Are there cheaper options for the audio thing? I'm trying to make it on a budget and 30€ for a earpiece seems a bit expensive, would it also work with a speaker? Or how could i connect an aux cable to the radio?

thanks i can now create a radio after an apocalypse

@MyAramil

Жыл бұрын

Id suggest making one before the apocalypses

5:57 “Did you know you can get your prescriptions for less at your local pharmacy”

@XiaoPichu

Жыл бұрын

*KZread sponsor* XD

Part 2 yeah

A future iteration might include a screw to fine tune the foil.

Does it matter what diode you use? I have black diodes that I use for full bridge rectifier, will theese work?

You don’t even need diode. Take a piece of blade from office box cutter knife or from safe razor and heat if with fire. The goal is to make the metal change its color right about in the middle of the piece. This border with weird color in the middle will have semiconductive layer that will act as a diode. Yes, it’s harder to catch the waves, but it’s possible.

@3DSage

Жыл бұрын

Yes I show that at the end of the video. It works!

thatll only work back when youonly had one radio station in the country . now those things will recieve every available station atthesame time.😮

Wow when you joined youtube i was only a few months old

hey, so is one turn of the wire one hert? or hurt i dont know how to say it - sorry

the first thing i said when i saw it was “eeeeeewwwwwwuhhhhwww …unless it’s supposed to look like that”

Gościu użył dźwięku z bloku ekipy lol

Will the piezo be louder if there is more/thicker copper wire wrapped around the 3D printed plasic part? ps: the first thing what I felt while watching was exitement. The video quality is great, I would love to see more interesting small projects.

@3DSage

Жыл бұрын

Yes and and it's best to have a long antenna. Thank you! I like making these little projects and I have several more in mind :)

@Wtfinc

Жыл бұрын

Your sink is absolutely the worst kind. Im amazed there is a signal because that faucet is likely not connected to the copper pipe work, usually plastic pipes. Downspouts with the paint removed where the hookup is, flagpole, the valve underneath sinks where it actually connects to the copper, hot water heater, my favorite might be the ground wire in a plug. Its the mouth of the plug. Tuning ur antenna to the proper length is key tho. Longer is not better. It should be half the wavelength. For am of 50khz u can try a 1/16 wave antenna at 1200ft or 374meters. And will work for 100, 150, and 200khz bands. Surely you could divide it again if need be. If ur antenna at any length is a bit out from what u want to receive, it might cancel that particular frequency if its a fee hairs off as to reflect and invert the wave within the antenna. Radio is so cool

5:57 "did you know you can get your prescriptions for less at your local pharmacy?" out of everything how do i hear that

Hold up, why have I never heard of double sided tape appliers? I only ever saw that mechanism being used in erasers XD Also, I can't find any here in Europe, what was the brand you used? (I could only find the 3M one, but with 50$ shipping : P)

@3DSage

Жыл бұрын

Search for Scotch roll on double sided tape. Or just roll on double sided tape. I think these roll on are kind of new. They are so helpful for many project so I hope you find it!

You should do a FM 3D printed radio as they are much more common

@swatidurge8981

Жыл бұрын

FM or frequency modulation is much better and newer and in more quantity than AM (which is power consuming and old )

@swatidurge8981

Жыл бұрын

AM is less used than FM

@3DSage

Жыл бұрын

That is a good idea!

How would you modify this project to recieve FM? since it's more common in other countries than AM.

@poyrikkanal

Жыл бұрын

Cant

Could you make an fm raidio

@DollyBoy_1923

Жыл бұрын

That would be cool!

W video

Hype

how about a walkie-talkie in that style?

@3DSage

Жыл бұрын

Great minds think alike! 😉

So hear me out. What if we use a bolt on that slider part. You can turn the bolt for fine tuning of the station rather than being really careful

we can’t let them kill am radio!

5:59 "And here you can see exaclty how importnat this diode is" *proceeds to open the circuit instead of showing what happens if you'd used a wire

How long are wire you use?

Make one that auto tunes and scans

Does any diode work?

It's basically a crystal radio.

could you make a transistor-amplified version?

@kensmith5694

4 ай бұрын

Yes but doing that means it them needs a battery.

ataching adiode to a LED ( light emitting diode) is very redundant.... you could just flip the LED to make the same point.

Hello 3dsage I've tried something with that before but I couldn't buy that particular diode so if you have a link for that diode could you send it to me Regards Tobias pennings

@user-mw7dq9oh8q

Жыл бұрын

лампа и есть свето диод

part to yay

I got a question can a regular piezoelectric buzzer works as an earpiece

@rizwanmalik3659

Жыл бұрын

Yes regular piezo disc work but higher inductor use parallel to piezo.

@Unbekannter_Mann

Жыл бұрын

@@rizwanmalik3659 thanks for the info

how do you know how thick your wire needs to be ?

@MyAramil

Жыл бұрын

I would wager that the thinner( to a point) the better as it allows you to have more coils.

use a germanium signal diode

4:42 idk last generation humour

What is the diode type you used?

@3DSage

5 ай бұрын

Germanium diode. It needs to be because of the low current levels.

@kensmith5694

3 ай бұрын

@@3DSage I found a workable alternative diode that you can get more easily kzread.info/dash/bejne/Z61rq5mAj8SZgdI.html The 1N5711 works if you put a 2K loading resistor across the earphone.

now do it for tv

@pizzazif

Жыл бұрын

jk it probably doesnt work the same way

Could these types if devices be turned into a generator?

@1x1boop28

Жыл бұрын

Like catching the radio waves and converting them into power?

@Kidozy

Жыл бұрын

@@1x1boop28 yea

@Coastal_Cruzer

Жыл бұрын

Wouldn't be a generator, but a collector. However it would be very very inefficient and ineffective

6:20 ? FTW? Diode from razor blade?

Background noise not loud enough as I could decipher a few sentences, thank you.

Lembra do Minecraft do gba?poderia fazer uma versão Snes?

That should be a prison radio😂