Instructables

How to make a bulb?

Actually I know how to make a bulb, but the problem is that I don't have any tungsten for the filament. Can you tell me any other alternatives for my bulb?

tanyutsharma9 months ago
You could use doubled up steel wool. It is available in almost every grocery shop, even though it won't last long , it will glow bright.
caarntedd10 months ago
I saw a TV show where a guy made his own lightbulb from scratch. When it didn't work as good as he wanted, he replaced the filament with a mechanical pencil "lead" to see what would happen, and it lit up very well.
iceng caarntedd9 months ago
Impressive, do you know if it was hard lead like a 4H or soft lead 1/2H ?
caarntedd iceng9 months ago
I don't know. I don't remember the name of the program (if you want to research it) but each episode he scratch built (most of the components of) some item such as a lawnmower or a toaster, then tested it. They worked poorly and cost thousands of dollars to make, but it was interesting to see him make his own glass, copper (from a solution retrieved from the bottom of a mine), plastic, steel, aluminium etc.
The man's name is Thomas Thwaites. He scratch built a toaster and subsequently wrote a book called "The Toaster Project". I think the TV series may also be called The Toaster Project.
iceng10 months ago
Why don't liberate a filament from an incandescent bulb and use that !
rickharris iceng10 months ago
ever practical :-)
rickharris10 months ago
Charred cotton thread
Charred bamboo strip
Any old thin wire
New materials:

A sliver of carbon fibre
Pencil lead
Practically anything that will conduct electricity

You won't get a result as good as a commercial lamp though.
Carbon fibre would be a great way to do it - but the OP should bear in mind the carbon filament bulbs were only powered to a bright red, not white heat.
Even in Eddistone's days they used arc lamps or Lime light for a white light.

There is a lot of information on line about the history of bulb making.