To all those commenting on earphones... The crystal earphone is much more sensitive than anything relying on a magnetic field. You are talking about microvolts driving the audio device. The extremely high impedance of the crystal allows a tiny voltage to develop across the earpiece. It's like the crystal pickup on and old record player where the tiny movements of the needle flexes a crystal to generate a small voltage. Just the opposite here, though - the voltage flexes the crystal to move the diaphragm in the earpiece. Have fun!
This makes me appreciate radio’s! It’s amazing how cheap radio’s are to buy! Compared to trying to build one!! It makes you realize in “expensive” radio is not a waste of money!!
I appreciate the simple materials. I never thought of gluing the coil to a piece of cardboard. I usually use wood but cardboard is much easier to work with. I've made many comments on how to improve, I hope you are not offended. This is extremely clever the way you made it. I hope other people get caught up in this great hobby. Thank you!
Thanks for the awesome video. I have tried your telegraph video is worked really well. It's easy to learn using your instructions. One suggestion: if you can share the science behind it. It will help in making things clear to my kid. He loved your video and made things on his own. Thanks for knowledge sharing 👍
Very creative! I've never seen anyone use paper fasteners to connect the wires before. Very, very good idea. In most cases you won't hear anything without about 20 feet of wire for the antenna. An antenna will work better outside than inside. I think this man is fairly close to a transmitter that he doesn't know about if he can hear any sound just by holding the antenna wire. If you stick a pipe or a metal rod in the ground to attach to the ground wire outside your window you will increase the volume noticeably. A speaker will not work unless you have a long antenna and are about a quarter mile away from the transmitter. And old telephone receiver from the seventies or eighties will work. I'm going to use the paper connectors. Very good idea!
@@A_youtube_channel_ You'll probably still need a long antenna. The amplifier only makes whatever is there louder. If there are very weak signals that can be heard, an amplifier will help.
I did that when I was about 12 years old and dad was surprised to hear the local radio blasting out of the mess of wires and earphones. haha true story.
Thank you for this wonderful video. It would be wonderful if, as you were doing things, you explained a little bit why you need this and that component - for example, what does the coil do, why do we need to slide those rolls, etc. Thanks again, this is very useful!
Will it work if the capacitor foil is crinkled and if the coil isn't perfect? Also which way should the diode face left or right and can you tape the antenna wire to a coat hanger to extend it and is the paperclip enough to act as an earth? And does the side the foil face matter?
I did this step by step and all I got was a light static. I used the antenna wire and connected it to a radio antenna and the ground wire I connected it to a metal piece and that’s it. No station or talking...please help
You might need to move to a different location or extend the antenna. Also make sure the aluminum foil is not touching and your diode is connected properly
You may need a different earphone. Most new magnetic headphones or earphones are 8 to 32 ohms and will not work on this radio. You need a piezo phone like the man used or a magnetic headphone 2000 to 3000 ohms
can we use copper wire and which type so schottkey diode should we use and how many number of turns should we make while wrapping the copper wire on roll?...please reply
Yes_ You can use any type of wire of any metal that wears isolation and diode is bat85 or any RF germanium diode or transistor. 80-100 turns will be enough for the medium wave, 300 for long wave. 5-20 turns for short wave. Good luck!
@@Alex-nv7cf Thanks for the explanatory note, which we missed from the video. He carried on showing how he made it, not explaining anything. That is one of its drawback. Otherwise it is good.
The ear piece cannot be any kind of headphone. The ear piece in the video has a crystal inside of it. This is necessary, the crystal is part of the circuit.
so it does not need any power? and what frequency it might catch as we don't have any control over that? I thought the foil thing would help in playing with frequencies.....
It is powered by the radio frequency power of the radio station. It is a tiny amount of energy, but energy still. BTW, the longer the antenna, and the better the ground, the more energy received and the more power to the earpiece.
Use about 50 or 60 feet of 26 to 30 gauge wire. A 1n34 germanium diode...I don't know which value schotky diodes are good for radios. If you get a magnetic headphone, you want at least 2000 to 3000 ohms. They can be purchased from Scott's Old Headphones website. The piezoelectric earphone shown wears out quickly because the new ones only have the wires glued on instead of soldered. It's good for just an experiment to see if it works, but if you want headphones that will last for years, get a pre-1960 magnetic headphone.
@@heyhunter3000 yeah, I recognized it. But the kit has a bunch of other stuff with it, which, if you dont want all the extra projects, is why it's better to just make it at home with cheap materials than buy a kit.
Where is the tuner? ... Isn't there supposed to be a tuner rod to slide on the coil? How is the paper clip a ground? What is it grounded to? I think you are missing some pieces.
What Stuff? You surely succeed in that. I wanted to know if you are able to check if I entered the giveaway, I think I did it all well but could you please confirm it?
i was disappointed when i saw the commercial diode that could of been made out of household items or at least just use an led we all have them laying around
How do I tune the signal? In the kit that you got the parts from it says to side it up and down to tune it but that does nothing so am stuck on cristian radio lol But it's still kind of cool as it doesn't need an external energy source to produce sound
@@WhatStuff Did it catch any signal from any station? You have not shown it. We would have been benefitted if you showed it. Otherwise what is the use of so much toil in making it?
He is making us foool, big fool, he did not use any kind of electronical components, so how can it work, one of main thing of all, he did not use bettery
@@chrisakarazor9612 Can I use one of the receiver of old telephone set? My elder brother used to make one crystal radio with that. Will that work, if it be so I will try to get one and make a crystal radio. I am old enough (80 years now) and still curious to make one.
What kind of Schottky diode and earphones? My Schottky diode looks a bit different than yours, so I would like to know what kind you have used so I could buy that if needed. Is any generic earphone good or are there any specifications you recommend? Soon I will build mine.
Thank you for the video. I felt I will ask some questions, but here in YT I find the video-makers ask viewwes to comment and agree to reply. But I see the fate of the following comments and no reply on the part of the maker. So I refrained from doing anything. any question asking.
It gets the power (microvolts) from the radio transmitter. AM stations use 10,000 watts upwards of RF power. The germanium diode works either way round as it turns the AC radio waves into DC to feed the high output crystal earpiece.
Repent and trust in Jesus. we deserve Hell for our sins. For example lying, lusing, saying God's name as a cuss word and stealing our just some examples of sin which we can all admit to doing at least one of those. For our sin we deserve death and Hell, but there is a way out. Repent anf trust in Jesus and you will be saved. Repentence is turning from sin. So repent and trust in Jesus. He will save you from Hell, and instead give you eternal life in Heaven. John 3:16 Romans 3:23😊❤😊❤
You don't need a power source, the radio waves are turned into soundwaves. But you need a crystal earphone for this because you need a very sensitive speaker.
I appreciated your going through all of that, but it was anticlimactic for you not to test it. I mean, isn’t that really the reason why we watched your video? Geesh.
You really don't have a clue what you are doing do you? But thanks for the effort. No, not any speaker or earphone will work if you aren't using an amplifier - only a high impedance earphone and no they are not "cheap". You need a much better "ground" and "antenna" unless you are practically on top of the radio station. But it was nice of you to try and it is a very simple example.
My Dad made them in the 40s.... He used the bed springs as an antenna and the water pipes as a ground.... We thought he was a magician....
40 years back me too made this radio
He was a magician.
Back then people were more creative than they are today
How old are you
@@jestusfernandez8327 doesnt seem like it from your grammar
To all those commenting on earphones... The crystal earphone is much more sensitive than anything relying on a magnetic field. You are talking about microvolts driving the audio device. The extremely high impedance of the crystal allows a tiny voltage to develop across the earpiece. It's like the crystal pickup on and old record player where the tiny movements of the needle flexes a crystal to generate a small voltage. Just the opposite here, though - the voltage flexes the crystal to move the diaphragm in the earpiece. Have fun!
Use a razor blade and a pin for the diode and then the radio could be made completely from junk
This makes me appreciate radio’s!
It’s amazing how cheap radio’s are to buy!
Compared to trying to build one!!
It makes you realize in “expensive” radio is not a waste of money!!
Sir u should have given a demo also whether it worked or not.
Thanks for telling how it's made
Your way u described is really good. Have a good day.
I appreciate the simple materials. I never thought of gluing the coil to a piece of cardboard. I usually use wood but cardboard is much easier to work with. I've made many comments on how to improve, I hope you are not offended.
This is extremely clever the way you made it. I hope other people get caught up in this great hobby.
Thank you!
Next, I will build a boat out of popsicle sticks, but I’m not going to show you if it actually floats.
Next I’m gonna make a car made out of apple slices but I’m not gonna show you if it worms
Thanks for the awesome video. I have tried your telegraph video is worked really well.
It's easy to learn using your instructions.
One suggestion: if you can share the science behind it. It will help in making things clear to my kid. He loved your video and made things on his own.
Thanks for knowledge sharing 👍
Why you don't let us hear a sound , unfinished work.
Very creative! I've never seen anyone use paper fasteners to connect the wires before. Very, very good idea.
In most cases you won't hear anything without about 20 feet of wire for the antenna. An antenna will work better outside than inside. I think this man is fairly close to a transmitter that he doesn't know about if he can hear any sound just by holding the antenna wire.
If you stick a pipe or a metal rod in the ground to attach to the ground wire outside your window you will increase the volume noticeably.
A speaker will not work unless you have a long antenna and are about a quarter mile away from the transmitter.
And old telephone receiver from the seventies or eighties will work.
I'm going to use the paper connectors. Very good idea!
He didnt even make it its from a kit and it doesnt work
Can you just connect to an amplifier so it works at any distance?
@@A_youtube_channel_
You'll probably still need a long antenna. The amplifier only makes whatever is there louder.
If there are very weak signals that can be heard, an amplifier will help.
I did that when I was about 12 years old and dad was surprised to hear the local radio blasting out of the mess of wires and earphones. haha true story.
Your tape dispenser prowess was amazing.
This works perfectly. You can use gang candencer for best tuning. This is very simple and good I have made many time for children.
Thank you for this wonderful video. It would be wonderful if, as you were doing things, you explained a little bit why you need this and that component - for example, what does the coil do, why do we need to slide those rolls, etc. Thanks again, this is very useful!
The ScienceWiz kit comes with a book that explains how this radio works! I will post a scan if I remember
@@zzoinks Please post for the benefit of all those who are interested.
Will it work if the capacitor foil is crinkled and if the coil isn't perfect? Also which way should the diode face left or right and can you tape the antenna wire to a coat hanger to extend it and is the paperclip enough to act as an earth? And does the side the foil face matter?
Coat hanger probably won't work for an antenna unless you can see the transmitter from your house. You will probably need about 20 feet of wire
Doesn't matter which way it faces. Foil can be wrinkled.
The best ground is a rod or pipe just outside your window
I did this step by step and all I got was a light static. I used the antenna wire and connected it to a radio antenna and the ground wire I connected it to a metal piece and that’s it. No station or talking...please help
You might need to move to a different location or extend the antenna. Also make sure the aluminum foil is not touching and your diode is connected properly
You need about 20 feet of antenna wire and a rod or pipe in the ground for the ground. How far are you from an AM radio station?
You may need a different earphone.
Most new magnetic headphones or earphones are 8 to 32 ohms and will not work on this radio. You need a piezo phone like the man used or a magnetic headphone 2000 to 3000 ohms
What was that thing that you kept at the middle of the pins
A schotky diode, but a 1n34 germanium is easier to get
I did a flat version of the variable capacitor on my channel.
It is much easier than what you did.
Sick dude I’m also pretty sure I bought your inventions kit.
"This needs to be grounded to work". Yes it does, so how did you "hear voices"?
He did not give any!
can we use copper wire and which type so schottkey diode should we use and how many number of turns should we make while wrapping the copper wire on roll?...please reply
Yes_ You can use any type of wire of any metal that wears isolation and diode is bat85 or any RF germanium diode or transistor. 80-100 turns will be enough for the medium wave, 300 for long wave. 5-20 turns for short wave. Good luck!
Use 26 to 30 gauge wire
@@Alex-nv7cf Thanks for the explanatory note, which we missed from the video. He carried on showing how he made it, not explaining anything. That is one of its drawback. Otherwise it is good.
Is the aluminum pipe is the variable capacitor? Genius. I like it.
Does it works? without power?
Yes, it's powered by the very tiny amount of energy in the radiob waves
The ear piece cannot be any kind of headphone. The ear piece in the video has a crystal inside of it. This is necessary, the crystal is part of the circuit.
A high impedance dynamic headphone will work. At 3:59 he is putting a diode in the circuit.
Awesome! I will try this at home
so it does not need any power? and what frequency it might catch as we don't have any control over that? I thought the foil thing would help in playing with frequencies.....
Yes, the foil capacitor changes the frequencies
It is powered by the radio frequency power of the radio station. It is a tiny amount of energy, but energy still. BTW, the longer the antenna, and the better the ground, the more energy received and the more power to the earpiece.
The thing is i really am using this for a science fair project...
Could we have exact measurements on these materials?
Use about 50 or 60 feet of 26 to 30 gauge wire. A 1n34 germanium diode...I don't know which value schotky diodes are good for radios.
If you get a magnetic headphone, you want at least 2000 to 3000 ohms. They can be purchased from Scott's Old Headphones website.
The piezoelectric earphone shown wears out quickly because the new ones only have the wires glued on instead of soldered. It's good for just an experiment to see if it works, but if you want headphones that will last for years, get a pre-1960 magnetic headphone.
Once again someone posts another video on how to make a radio and there is no sound just like the other videos.
I like it thanks for sharing your idea for us
It’s a invention kit he copied the design of one of the homemade radio one
@@heyhunter3000 yeah, I recognized it. But the kit has a bunch of other stuff with it, which, if you dont want all the extra projects, is why it's better to just make it at home with cheap materials than buy a kit.
Can we use earphone to listing sound
Yes, of course.
Where is the tuner? ... Isn't there supposed to be a tuner rod to slide on the coil? How is the paper clip a ground? What is it grounded to? I think you are missing some pieces.
It's best if the ground is connected to a pipe or metal rod driven into the ground outside of a window.
I would use 20 feet of antenna wire
@@chrisakarazor9612 What type of antenna wire we need? Please specify.
Keep up the good work
Mickeyo Stad Thank you
What Stuff? I like your videos so much because you only need household items! and nice that you do a giveaway.
Mickeyo Stad Yes. I try to make them simple and effective
What Stuff? You surely succeed in that.
I wanted to know if you are able to check if I entered the giveaway, I think I did it all well but could you please confirm it?
you are in.
We are appreciation for teaching us.thank you.
i was disappointed when i saw the commercial diode that could of been made out of household items or at least just use an led we all have them laying around
If you use an LED you need to bias it with a 1.5 volt battery
sir pls tell whats diode name ?
How do I tune the signal? In the kit that you got the parts from it says to side it up and down to tune it but that does nothing so am stuck on cristian radio lol
But it's still kind of cool as it doesn't need an external energy source to produce sound
And also can you change where the signal comes from?
By sliding the roll up and down you are catching a signal.
@@WhatStuff Did it catch any signal from any station? You have not shown it. We would have been benefitted if you showed it. Otherwise what is the use of so much toil in making it?
So this means no dc voltage is required. I m confused 🤔
NO so far as my knowledge goes. NO electric connection. no batteries even needed.
Batteries are not required.... Ear phones "ARE" speakers
He is making us foool, big fool, he did not use any kind of electronical components, so how can it work, one of main thing of all, he did not use bettery
@@bachpankiyaadein6373 look up crystal radio's, they don't need batteries.
Stupid project, how can it possible without battery radio work,
@@bachpankiyaadein6373 there were many radios like this during war time and they really don’t require batteries whatsoever
Powered by radiowaves
Is this a AM or a FM radio?
PM
@@globalmagicnation8464 hahahaha
AM
can we use the speaker for the ear phone
No, there is not enough power to drive a speaker
@@chrisakarazor9612 Can I use one of the receiver of old telephone set? My elder brother used to make one crystal radio with that. Will that work, if it be so I will try to get one and make a crystal radio. I am old enough (80 years now) and still curious to make one.
Thank you so much
No antenna, no ground = no working.
You need antenna and ground
Does it need electricity?
No. The diode detects radio frequencies and makes the headphones move back and forth.
i like the model u make but dont like the way u elobrate
Did it need battery to run
Bashir Ahmad hmm I'm sorry you feel this way. I did show step by step instructions. No battery was used
It is powered only by the radio waves. I can hear stations 300 miles away on mine
Really? Dude..they make store bought radios now. Already built and everything! LOL.. j/k/...fun video.
does it need battery
Anubhav Mishra no batteries needed
What kind of Schottky diode and earphones? My Schottky diode looks a bit different than yours, so I would like to know what kind you have used so I could buy that if needed. Is any generic earphone good or are there any specifications you recommend? Soon I will build mine.
Use a 1N34A diode it will be more sensitive.
Can I use a 1n4007 diode
Headphones should be 1000 ohms or more for strong local stations. 2000 or more for weak or distant stations
brother i wanna ask that if we can use any speaker instead of this earphone....please reply
Speakers would not work since they would require a power source
What Stuff? If we did wanna add a power source, how would we do that?
Yes you use speaker but with amplefier
The best is a high impedance earphone. Check e-bay. Also use a 1N34A diode it is more sensitive.
A 2000 ohm or higher headphone is best. An old telephone receiver from the Seventies or eighties would work
I pick up more sound of my bog roll holder 🤣 you didnt say polarity of diode still who cares
Thank you for that matter
Thank you for the video. I felt I will ask some questions, but here in YT I find the video-makers ask viewwes to comment and agree to reply. But I see the fate of the following comments and no reply on the part of the maker. So I refrained from doing anything. any question asking.
This is fm reciever?
No. Just for AM
what size wire is best
See the reply made by Alex, 26 to 30 gauge, if I understood rightly your query. And it needs 90 to 100 turns. You measure it then.
I did it and my radio doesn’t work what do you think I did wrong. Please answer
Andre Klingler
It's worst fuck off .this s not human doing .
hey bro can we use copper wire......please reply☺☺🙂🙂😮
Yes with enamel insulation would work the best
@@WhatStuff A sigh of relief. Only reply on your part!!!
The “your phone in quit looks a lot like a tiny light!? I’m confused!!
Whould a 1N4001 diode work?
Pretty much any small diode will work.
is this radio clash
Am or fm?
AM only
Circuit diagram pl
I can't put a picture on here, but Google Crystal radio schematic. The most common one that comes up is the one he is using
It worked
Very good!
so wheres the battery😠
It doesn’t need batteries
It gets the power (microvolts) from the radio transmitter. AM stations use 10,000 watts upwards of RF power. The germanium diode works either way round as it turns the AC radio waves into DC to feed the high output crystal earpiece.
I made this model out of wood witrh feet and everything
Never heard the radio play
Probably need longer antenna 20 feet or more. Maybe a better ground
You do not set the battery yet
It doesn’t require batteries
HOW TF DO I WRAP THE WIRE AROUND THE TOILET PAPER ROLL IT JUST KEEPS COMING OFF UUUUUUUUGGGGGGGGGG
good
Fm or am radio?
nice
Repent and trust in Jesus. we deserve Hell for our sins. For example lying, lusing, saying God's name as a cuss word and stealing our just some examples of sin which we can all admit to doing at least one of those. For our sin we deserve death and Hell, but there is a way out. Repent anf trust in Jesus and you will be saved. Repentence is turning from sin. So repent and trust in Jesus. He will save you from Hell, and instead give you eternal life in Heaven.
John 3:16
Romans 3:23😊❤😊❤
Not a schoksy diode you what a geranium diode
1N5711 diodes can be made to work
Haw to the connection of electricty
You don't connect it to electricity.
It doesn't require electricity.
It's powered by the tiny amount of power in the radio waves
where is baltary
Powered by the radio waves
Why do people ask such foolish question? Maximum number of viewers are obsessed with battery!
Doesn't work. Also, this is a "ScienceWiz" kit from hobby lobby if anyone is interested. Other things in the kit work, just not this at all.
I mean, it clearly works in the video?
You forget to add power source,. 😂
You don't need a power source, the radio waves are turned into soundwaves. But you need a crystal earphone for this because you need a very sensitive speaker.
U need an amplifier sound system.
Or a piezoelectric earphone
You could use magnetic phone over 2000 ohms
@@chrisakarazor9612 How about a mobile earphone? Will it work?
question is: Do you kno de wey
This really work or not
Pratyush Tripathi it works
What Stuff? Is it low in volume bro it's not loud
Yes you can adjust with headset
What Stuff? Do you think it can be improved
Yes. More wire for a stronger signal and build in a bigger scale.
Bro this really work or not.because i made for my project.please answer my question??
If done correctly, it will work. Feel free to share if you have luck with it :)
HOW YOU GOT 205 THUMBS UP IS BEYOND ME
Probably a lot of things are beyond you....
How!?!
High people Isaac walker
can you make a crystal diode from scratch
Yes, you can use a piece or iron pyrites also called "fool's gold" touch it with a copper wire until you hear a station
I appreciated your going through all of that, but it was anticlimactic for you not to test it. I mean, isn’t that really the reason why we watched your video? Geesh.
There is no power source it is fake
No. Not fake. Powered by radio waves
This does not even work
imagine if it starts working but it plays copyrighted music
Zero explanation of how it works, I'm disappointed.
Powered by the tiny amount of power in the radio waves
🤔😃👐👍!
ohne Worte. DTdkf.!
Macgyver ha ha ha ha Ha ha Ha ha .
You really don't have a clue what you are doing do you? But thanks for the effort. No, not any speaker or earphone will work if you aren't using an amplifier - only a high impedance earphone and no they are not "cheap". You need a much better "ground" and "antenna" unless you are practically on top of the radio station. But it was nice of you to try and it is a very simple example.