The Sci Guys: Science at Home - SE1 - EP12: Homemade Light Bulb - Graphite Light Bulb
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- Опубликовано: 11 сен 2024
- Welcome to the twelfth episode of The Sci Guys. In this episode we will be investigating an experiment involving circuits and we will be making a homemade light bulb using graphite and batteries. We will show you how you can explore this topic at home with a bunch of simple household items.
Help support us to do more experiments by becoming a patron on patreon: / thesciguys
Equipment and Ingredients:
8 x D Cell Batteries
2 x Alligator Clips
Graphite Mechanical Pencil Refills
Shot Glass
Mason Jar or Large Glass
Electrical Tape
Goggles
Heavy Gloves
Lab Coat or Apron
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I have to say this is my favourite one yet! Not sure if I ever will need to make a homemade light bulb but good to know I now know how!
I am glad you like the videos and that you learned something from them. If people keep sharing our videos then we will continue to grow. It just takes time.
I know this is an old video, but will still use this for my classroom... its a pity that kids these days aren,t into science like before.
At higher temperatures, the substance becomes brighter and its colour changes from red towards white and finally blue. Lower colour temperatures (2,700-3,000 K) are called warm colours (yellowish white through red).
So depending on the colour and how bright the light of your graphite is, will determine its approximate temperature.
To learn more search incandescence and color temperature on Wikipedia.
It was fun to do and a little frustrating. If the graphite has imperfections it can pop and break before you get to see it glow and you have to try a new piece.
The longest we were able to keep it on was between 5 and 10 seconds depending on the piece of graphite. Through trial and error you may be able to find a way to make it last longer but I would not rely on it for a black out. If you turn off all the lights before you do this experiment you can see how bright it glows, and how beautiful it looks.
All your videos are excellent. Well done SciGuys!
Another reason to adore Canada! :)
Your question relates back to incandescence. In practice, virtually all solid substances start to glow around 798 K (525 °C), with a very dull red colour, when no chemical reactions take place that produce light as a result of an exothermic process. This limit is called the Draper point. The incandescence does not vanish below that temperature, but it is too weak in the visible spectrum to be perceivable.
I feel smarter after watching these videos lol .. great videos keep it up hope you guys get bigger
The temperature gets so high because of the flow of electricity through the carbon molecules. It produces light because when the circuit is complete electricity flows and the energy from the electricity is absorbed by the carbon molecules, it puts them into a higher energy level. Molecules do not like staying in higher energy levels and want to release the extra energy so they can return to more stable lower energy levels. They release this energy in the form of light and heat.
How long can you keep the "light" on? May be good if there was ever a power outage? :P
Thanks you for this experiments ❤️❤️🇹🇭
Cool
Will the pencil lead melt?
If you like you can make another experiment like this but use Carbon Dioxide and Helium. It will make the lamp last longer and I think it will be very interesting. I am doing my science fair project on this, and I watched this video and it really helped me get some extra information.
Thanks!!
Dear Adam,
Lets try this with a car battery and thicker lead.
Love,
Jeff
Just out, Episode 12 of our science at home series. In this episode we make a home made light bulb with mechanical pencil lead and batteries. Making the light bulb was an enlightening experience.
Check it out, share it with your friends, and let us know what you think.
ruclips.net/video/xre81ZuqyEg/видео.html
Very awesome!
I have a question, if you don't mind. I see a lot of these videos using pencil lead. I guess this is because pencil lead is a common household item. If you use a piece of tungsten - say a tungsten ring - between the clips, would it still work? Would it last longer?
yes, but the shape of the coil also needs to be taken into account, which is usually thinner than a strand of hair even then modern ones are double coiled meaning rolled up into a coil but even have little pieces inside the coils be coils, this will achieve tripple the light than a tungsten of the same thickness in only a single coil
can we use 9 volt batteries instead of d batteries?
I dont know what did I do wrong I connected graphite to power station with crocodile clips (the one you can get own voltage and amps) and graphite isn't even getting warmer (electricity I used is 10-30 volts and 1-5 amps) is the problem in power station?
Is it possible to do this using a 9V battery? What size lead you using?
what is the reason why does temperature becomes high?
why does pencil lead emits light when you have complete circuit?
is it necessary to use the same wire u guys used
what specific temperature does pencil lead emits light?
tnx...
Approximate for how much time till one piece of our grephite will glow
Plzzz Answer this
Please sir
Can we do it with normal coil wire except alligator clips?
+shobhit rathi Do you mean instead of alligator clips? We used alligator clips to make it easier to clip and unclip.
Can we do it any other size of battery like AA or something..?
+shobhit rathi As long as you are using the battery chain produces the same amount of energy at the same rate as what we made, then it should work.
Wanna make it last longer? put the shot glass mounting inside the jar. Now light up a candle and cover with a jar cap. Let it extinguish due to lack of oxygen and let cool so that CO2 falls securely to the bottom. Now very very gently remove the cap and the candle with tongs. put the cap back on...again veeeeeeery gently. now it should last longer.
also why have you stopped uploading:(
Hi, I need help. Me and my friends tried this. We first used 4 D Batts, It didn't worked. Then 5 D Batts, it worked. But then when we used 8 D Batts (using the same batteries) it didn't light up so bright like in your video and the other vids we saw.
What was wrong? Is it the batteries bc we've been using the same batteries during trial and error?
Thank you so much.
Aubrey Dc There are a lot of factors that could effect the brightness in this experiment. What thickness of pencil lead did you use? The thicker the lead the more energy it can hold. We found this experiment to be finicky. It can take a little bit of time for the lead to get brighter, if there are any gaps or cracks in the lead it may not conduct as well and may not get as bright.We had to try a lot of pieces of lead to get this experiment to work really well.
The Sci Guys Thank you for giving attention to my question, but I have another one. Our school requires innovation/s in the experiment we'll do. Can we use charcoal instead of lead? Will it still light up?
Thanks.
Aubrey Dc I think I have seen it work with charcoal. The amount of time it takes to glow or the amount of batteries you need to use may change depending on the thickness of the charcoal.
What type of battery do u use? how many volt?thanls
Nathan s 9volt batteries and bunch of them. We describe in the video how many and how to test if it too much or too little.
That would be a good light source if the power went off
Maybe you should follow Edison's lead and put the whole mess into a vacuum before hitting the on switch.
Richard Hill Well we simplified this experiment down so it was quicker and easier to do at home for the age group we are targeting. It would be fun to revisit later and place it in a vacuum.
Those are one ugly carbon molecules