Do you ever look at some of the most classic and world-changing inventions and think, “Darn, I totally could have invented that if I was born 100 years ago!”. Sometimes its a lot of fun to try to recreate these inventions making use of period-accurate materials — like this jar-based carbon filament light bulb!
The project is made out of simple household materials that you probably already have. A jar, some pencil lead, a clothes hanger, some nuts and bolts, a bit of silicone, piano wire and a bit of JB weld. The only thing you might not have is some compressed CO2 — unless you have a kitchen fire extinguisher, a paintball gun, or one of those home-made pop carbonation machines… Alternatively you can just buy some dry ice and let it sublimate in the bottle before you seal the bulb.
No fancy tools are needed (except for an air nozzle for filling the bulb), and it’s not too difficult to construct. The trickiest part is probably drilling small holes through the screw, but if you choose nice brass screws it’ll be quite easy to do.
Once it’s all assembled, plug it into a car battery and enjoy your inefficient 1-lumen light bulb! Still — pretty fun experiment!