How to make a light bulb Experiment (homemade light bulb)
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- How to make a light bulb Experiment (homemade light bulb)
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Mason jar
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D batteries
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How to make a light bulb Experiment
Your not going to be able to read a book with this light, but pretty awesome just making light. The way it works is the electrons from the battery flow through the alligator clips and pencil lead, which is actually graphite, creating a closed circuit. Just like Simple circuits we did a while back. The graphite or filament becomes so hot it glows and fills the Mason jar with smoke.
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#HowtomakealightbulbExperiment #lightbulbexperiment #lightbulbwithlead
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the graphite became so hot as its glows red, oxygen in jar will start reacting with the hot graphite to form co2,which cause the graphite became smaller and smaller and eventually "disappear"
Morning Hoi Sing Law, thank you for that explanation. Thanks Ken
How to let it last longer?
Hi Stanamarenko, Only thing I think would make it last longer would be to use less batteries, but I haven’t tried that before and not sure if you use less batteries if it would still work. If you try less batteries let me know the results. Thanks Ken
@@KidsFunScience thanks i will try
I'm going to make a lightbulb like this one. A good idea is to attach into the jar a little round piece of paper with a tip on the top coated with vegetable oil and let the flame compsume all the oxygen in the jar. Remember also to insulate the lid with hot glue where the conductors come out. Obviously to prevent a short circuit one of the two wires if not coated but just plain copper or aluminum then will need to be insulated toward the hole near the lid. It will work very well!
I have never seen this type of experiment before... love it! Great for teaching about circuits and movement of electrons... wow... the thicker one smoked up big time... thanks Ken!
this is a fun experiment thanks
Loved the video, man !!! Im 44 and into 'prepping' and i found this to be an EXCELLENT experiment to learn. Thanks !!! You may have just saved a life in a not to distant future !!! Im curious about using different types of filament. What would work the best ? How long could those batteries power such a device ? I have alot of solar batter banks for phone charging. Im gonna experiment with them and see what i can produce lol.
Hi Luke, Great questions, but I have not tried it before with different filaments nor have I ran it long to see how long the batteries would last. I think I would have to keep replacing the lead many times before the batteries went out. lol. If you experiment with it, please come back and post results as I'm now curious. thanks Ken
Imagine Thomas Alva Edison seeing this video!
i was making a science project for school, i already knew how to make a lightbulb but i needed confirmation that it works, Thx so much!
Good Morning @FellowRobloxian186, I'm glad this helped and hope your project was successful. thanks Ken
@@KidsFunScience thank you! I tried but i think the battery was to small and i didnt have any alligator clips.
@@FellowRobloxian186ok let me know if you try again so I can help you to get it to work. Thanks
why isn’t it working for me.. can you help me?
Good Morning Emily, Sorry its not working for you. Please email me at elementarysciencenight@gmail.com send me pictures of what your trying and a description so I can help you to get this working. Thanks Ken
Vaccum the oxygen by lightning a candle inside the Mason jar.
Helped me in physics... THX!
I wouldn't call it a super battery, because I have A DC POWER SUPPLY
It was more of a joke as I had multiple batteries taped together. Thanks
@@KidsFunScience ok :)
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why did you choose that many batteries?
My friend showed me with this many, so that is what I have always used. How many do you use? Thx
Just buy a 9V battery instead of 6 D batterys😂
Your right AA, AAA, C, and D batteries are all 1.5 volts. But they differ considerably in the amount of current and time they can produce. A bigger battery can produce more power over time.
A 9V battery is just that - 9 volts. But it has a lower current throughput. This lower current won’t let it work even though it’s 9 volts.
Oh ok😮 Sorry😅
I tried it but the led never lighted up
Email me a short video and I will see if I can help you get it to work
the gas smells really bad so cover the jar up if your trying this :D
Thank you I've been stressed out because I couldn't really understand how this worked thank you!!!
I think the homemade light bulb would work much better if you put a resistor
Good Morning Ender Bean The DoucheTuber & GachiTrainzzz, I agree, but in this experiment I just wanted to see if I could get it to work. Thanks Ken
😄😄😄😄, amazing, i did learn a crucial fact there brother, i salute you for that inspired short heavenly video, 😇😇
Thank you,This is for my school project
Good Morning Anne from California, Your welcome and thanks for watching thx Ken
Presumably this would work with strips of carbon filament?
Hi A. Jay, I have never tried it before with carbon filament, so I'm not sure, but if you try it will you let me know? thanks Ken
wow very wellm explained !Kids need to watch these kind of channels !Big big big like !
thank you
I use this for flexing on my friends at school hehe
Does this experiment always work? I would like to ask
Morning Euclid, It does for me. You need to make sure you have new batteries and the right size lead and it should work. If you try and can not get it to work, let me know and I will try to help you get it to work. thanks Ken
The jar needs to be sealed to create a vacuum to stop the oxygen getting in and burning out the lead.
My dad and sister did this, but they took it up a notch.
They bought a lab beaker with a rubber stopper, a supply of helium gas for party balloons, and used nichrome wire (the kind you find in classic 2-slot toaster or a hair dryer) hooked to an industrial AC rheostat to control AC voltage output.
Rather than burning the nichrome wire, using helium, nitrogen, or any inert gas you can get from a welding, laboratory, or party supply store will force the standard atmospheric air out of the body of your lightbulb, forcing the oxygen out.
The AC rheostat, while more dangerous than using direct current with batteries, gives you better variable voltage control with the higher current you need to produce a bright enough light. Different thicknesses of nichrome wire will determine how much current the circuit will draw, while voltage determines how long the element will light versus burning up and failing from thermal stress (exactly what happens to a normal incandescent bulb over thousands of cycles).
You could try the same thing with a DC voltage divider for better safety, but you’d need some pretty hefty resistors if your element is fairly thick tungsten, nichrome, or some high enough carbon content for a resistivity where the bulk of your watts are burned up as light and heat instead of passing through the conductor and causing a short.
WOW they did take it up a notch. Thank you for sharing. Do they have a link to it? thanks Ken
Interesting But didn't you put in a resistor to regulate the flow of current.
Good Morning Robert, lol no I forgot the resistor to regulate the flow. I will have to add it next time. Thanks Ken
Hello, what substitutes can be used in the place of lead to increase duration?
Good Morning @JeromeKJB, great question and I’m not sure. If you find out please let me know. Thanks
I'm going to make a lightbulb like this one. A good idea is to attach into the jar a little round piece of paper with a tip on the top coated with vegetable oil and let the flame compsume all the oxygen in the jar. Remember also to insulate the lid with hot glue where the conductors come out. Obviously to prevent a short circuit one of the two wires if not coated but just plain copper or aluminum then will need to be insulated toward the hole near the lid. It will work very well!
Good Morning Gyrofrank, Thank you for the tips as I will give these a try next time I try it. thanks Ken
@@KidsFunScience You're welcome 😊
What if you do multiple small pieces of Graphite stacked but not touching each other? Perhaps that would increase the life without sacrificing much lumens?
Hi Vinny, That is a great idea. I will have to give it a try. Only thing I might need more batteries to power up more pieces of lead. It takes about 45 seconds with 5 D batteries. Thanks for the idea. Ken
@@KidsFunScience Also, you should either vacuum seal the chamber or use an Inert gas (Helium is probably easiest to find)
Maybe u could put a candle in the bulb to burn away all the oxygen so the filament doesn't burn out
Good idea. I will try that next time. If you try please let me know your results. Thx
This didn’t work for me I’m using it for a science fair what am I doing wrong?
Hi Lily, sorry it didn’t work. Can you send me a short video so I can see what your doing? Also are you batteries new? Thanks elementrysciencenight @ @gmail.com thanks
Thank you for the great vid. What diameter lead is best?
Good Morning Bill, I used Graphite From Mechanical Pencil (I used .5mm)
@@KidsFunScience Thank you for your help. I look forward to your future vids.
@@billbrown994 your welcome and I hope to be back on track posting a new experiment every week. thanks Ken
Where can I get those wires? What are they called? I’m hoping to purchase on Amazon for my son to build
Good Morning Noah's Family, They are called Alligator clips. Here they are
amzn.to/3bGIvOa thanks for watching? Let me know how it goes? thanks Ken
Had a blast watching this video (and I’m almost 50)
Good Morning @stormbytes, Same here everytime I do this experiment I have just as much fun as the students I do it with and I'm 60. Thanks Ken
How many batterys would you need for 1 minute of light
I think the lead will burn out before the minute is up. As all my times of trying this the lead gets too hot and breaks. If you can get it to last for a minute please let me know. Thanks
Hello does this work with socket voltage instead but inside a vacuum? Will it burn?
Hi Sean dale villaflor, Not sure as I have not tried it with a socket voltage. If you try it please let me know your results. thx Ken
Maybe if you had more batteries the thicker lead would have worked
Good Morning donaldstrickland8093, Good point. I will have to try this next time I do it. Thank you for the suggestion. Thanks Ken
Thank you for this video Ken, I will include this experiment in our next science fair :)
Good Morning Matthew, Your welcome. This is one of my favorite experiments. Wish you best of luck at your science fair. thx Ken
Im using 0.7 mm pencil lead and 6 d cells but it's not working it is just producing smoke.can you please tell what changes should i make?
Hi , are the batteries new? Can you email me a short video showing me. Thx
I also have the same issue
This is so hard😮😮😮😮😮
What size of Pencil lead should I use? Does 75mm lead work?
Good Morning Marwin, I use pencil lead (0.5 mm thick) thanks Ken
how did it easily light up? I’m really trying my best but mine won’t work
Hi Laneta, Sorry your light is not lighting up. Maybe I can help you get it to work. If you would email me what materials you are using, send some pictures or short video to elementarysciencenight @ gmail.com I can see what you might be missing. thanks Ken
Love how educational your videos are keep them coming
thank you very much
how can I change this experiment to make it better. variables
Hi @beatrizvicens1928, Well I have always heard to use double A batteries instead of 9 volt batteries. Also if you had a stronger battery you might be able to use thicker lead to stay brighter longer. That is the only thing I can think of. Let me know if you try it another way and the results? thx Ken
Would a larger piece of lead take longer to blow? if so why?
Good Morning Ba Bo Ba, Great question as I don't know as I have only tried one size. I would assume the batteries would not support a larger piece, you might have to use a larger battery or more batteries. If you try a larger piece please let me know your results thanks Ken
What if we do tungsten filament would it do the same?
Good Morning Anukala, I have never tried tungsten filament before so I don't know if it will work. If you try it please let me know your results. thanks Ken
its not working for me :(((
Good Morning drymonday, I'm sorry to hear that its not working. Let me see if I can help you make it work. What size lead are you using? How many D batteries are you using? If you could send me a email at elementarysciencenight @gmail.com with pictures that would help me. Thanks Ken
Use Nichrome wire and vacuum the oxygen out of the mason jar by lightning a candle indise.
What will happen if you don't put the mason jar over the led?
Good Morning Emma, No it would not work. Think of an incandescent bulb, it has glass around it. The glass enclosure provides the sealed vacuum environment needed for the filament to glow for an extended period. It prevents oxygen in the air from reaching the hot filament.Without the glass bulb, the filament would overheat and oxidize in a matter or moments. Glass is the only material that can sustain the intense heat required for an incandescent bulb to operate. thanks for watching. Thx Ken
@@KidsFunScience Alright, thanks
This can work with 0.2mm nichrome wire?
Good Morning daine ramos quitco, I didn't know that, very cool thank you for sharing.
what is that red and black wire?
Good morning itz._.chocopanda, they are alligator clips. 0:22. Thx Ken
I loved it!!! Thank you for this video!!
Good Morning Sara, I’m glad you love it as it’s one of my favorite experiments. Thanks Ken
Use tungsten or nichrome next time :)
Thank you I will
Cómo logras que la luz sea blanca
Good Morning Bryan, I don't understand your question? thanks Ken
Hello I have a question it is ok if i dont use alligator clips? I will use wire only? And one more question will it work if i connect it in 250V? Tyanks good video
Morning SUMMONER PAUL, I have not tried it before without alligator clips, but it should work. I have only used D batteries, so using 250V might be to strong. I believe a single D battery is about 1.5V and I used 6 or 8 so only about 9/11V in my experiment. Be careful, as with the D batteries it heats up and batteries do get warm. Thanks Ken
@@KidsFunScience thanks. I use 9V battery but it not worked. Any ideas?
@@KidsFunScience it only heats up
Nice vid, but i would like to know how this works on a atomic level too
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❤
Can we use any kind of battery or is it important to use the ones u used
Good Morning BLINK ONCE, I have only use Duracell but I think you should be able to use any kind. Just make sure they are new. Let me know how it goes. thanks Ken
@@KidsFunScience 😊 thank you!
Is it needed to put a match inside to create a vacuum?
Good Morning Bill, I have not used a match but it might help. If you try please let me know how it turns out? thanks Ken
Ok. I will let you know.
that was awesome! thankyou!
Hi Owens Daniel, thank you as it’s one of my favorite experiments. Thanks Ken
you could've just used a 9volt battery...
Morning glutenfree atlas, No a 9volt does not have enough electrons from a 9 voly battery flow through the alligator clips and pencil lead (graphite). The graphite or filament needs to get so hot it glows and fills the Mason jar with smoke. A 9volt can not make the graphite glow and is why I need so many D batteries. thanks Ken
@@KidsFunScience so the internal resistance of the 9 volt doesnt allow enough current?
I have not been able to get a9 volt to work with lead. Now 9 volts work with Christmas lights. See my Simple circuits experiment. th-cam.com/video/-0-9NFUYHkg/w-d-xo.html thanks
It doesn't work
Morning Iahna, Sorry to hear, but I would like to try to help you get it to work. Can you email me a short video on what you are doing? My email is in the about on my channel. What type of batteries? Are they old or new? Type of lead? thanks Ken
I'm just curious
Good Morning Junpei, Same here, I think science does that to all of us. : ) thanks for watching
Cool idea
Good Morning Village Science Factory, thank you as I do this at my Science Night LIVE shows at the elementary schools. thanks Ken
Hey, i just want to ask whats the volt of one battery
Hi LuckyKun, Standard D batteries offer a voltage of 1.5 volts.
Thanks for teling me
Can we use smaller batteries, like the AA or AAA batteries
Good Morning LuckyKun, I have not tried, but would assume you would need same number of batteries to make it work. AAA would be pretty long, where D batteries a little shorter. If you try let me know how it turns out. Thanks Ken
@@KidsFunScience yeah, ok sure
Give a way of eliminate oxygen from lamp and it can hold for more time.
4:02 - Thick graphite drains so much power than this batteries can handle, try a car battery instead, remember that a pencil graphite drains about 20 amps, imagine this graphite one!
Good morning dschannel1171, thank you. Next time I will give it a try. Thanks Ken
welldone
Morning Naeem, thank you as this is one of my favorite experiments. Thanks Ken
What size led did you ise
Use
5 mm lead
You need to remove the oxygen in the jar...
Or use inert gas.
You can do that but lighting a candle inside.
@@rayblanco4477 Interesting, but you won't be able to achieve a strong vacuum because the candle will go out pretty quickly.
@@Vinnay94 wouldn’t that be desirable since it basically indicates there’s no oxygen to react with
@@awsom97 There's still gonna be some oxygen, just not enough to keep the flame going, but will still burn out the filament rather quickly. Incandescent Lightbulbs are evacuated quite a lot.
Basically just a short circuit without any control, not very convincing
Elementary school science. Not electrical school.
@@KidsFunScience make's it quite dangerous don't you think? 😅
When I did it the lead just beaks
Good Morning Bernice,
Sorry to hear that it keeps breaking. I will try to help you get this to work. What size lead are you using? Thanks Ken
0.5 and 0.7
Whats the hypothesis
My hypothesis was when I touch the wires to the batteries that are connected to the pencil lead the light bulb would light up. Thanks Ken
Hi may I use this for my grad project?
Good Morning Athena, Yes you can use it for your project. Let me know if you have any questions and how it turns out? thanks : )
@@KidsFunScience Anything I can substitute the lead for?
Yeet A 37 you literally use pencil graphite
@@TylerStrandlie r u trying to make me sound stupid
THIS ISNT SO NICE ..... VERY BAD
Why
Except, the smoke from the lead is also cancer causing..
imagine thinking pencils have lead...
It’s graphite but still the smoke is harmful