what purities of sodium iodide and hydrogen peroxide are required to replicate the bogfoam prank from brainiac?

Helo , i would like to know, what purities or quantities are required to replicate the bogfoam prank from brainiac, in which dr. bunhead puts hydrogen peroxide in the water resevoure and sodium iodide in the bowl, then flushes the toilet and the whole room fills with foam, i need to know how much and how pure, please, a and also if the foam is bruoght up by soap, and if not is the foam toxic

Question by oldmanbeefjerky 8 years ago


Brainiac's: Cool Things in Slow Motion including exploding a balloon filled with gas

The following video shows a few things that we have seen and take for granted, only in slow motion. Some are real eye-openers...

Topic by Goodhart 10 years ago  |  last reply 8 years ago


what are the specs to making a fog ball cannon from a rubbish bin, fog machine rubber band and garbage bag? Answered

hey, a while ago in high school out teacher was showing uss tuff to do with the transferance of energy and stuff like that, what he brought into class one day was a rubbish bin, with a hole cut out bottom, and on the lid, there was a rubbish bag(the big black ones) , on top with a rubber band taped to it. basicaly the way it worked was, the band is taped to the bag,m when you pull the band back, you pull back the bag also, which pucks in air into the hole in the bottom of the bin,but at this time the hole is actually the top of the cannon, as thats where the air enters and comes out. now when the air is being sucked into the bin, our teacher also had a hose from a fog machine attached to it, which made the bin suck up air, now when he let the band go when the bin was full of air, a ball of air shot out, and the fog remained inside that air ball so we could see where the ball went, which was around 20 meters, anyway, the fog ball could nock over polystyrene cups from 20 meters. i want to know exactly how to build one of these as i cant really remember how they look like as i have forgotton, i was reminded of these once when i saw one being used on rollercaoster, in the minishow, elliot and the surfing scientist.

Question by oldmanbeefjerky 8 years ago  |  last reply 8 years ago


BUG...Android Nexus 7

Hi since instructables started using CAPTCHA i can no longer post comments on my android ,Nexus 7  device it does not show the CAPTCHA at all i love the moblie version of Instructables so would really love if the brainiacs behind the mobile verion could fix it  :)

Topic by Dustin Bess 6 years ago  |  last reply 6 years ago


AC motor speed controller for stereo turntable

Hello Brainiacs, I am wondering about salvaging a electric fan speed controller for my Vintage (1980's) Stereo turntable. I purchased a table from Europe and it ran on 50Hz 240v. But once I rewired the unit for 110v 60Hz it still ran too fast. It is a synchronous 24 pole motor driving a small pulley and belt system. I was told a speed controller would fix the issue by varying the voltage. True? Or if someone could come up with a schematic! ??? Any suggestions? 

Topic by bullit224 5 years ago  |  last reply 5 years ago


Lighthouse pulsing light

Hi all - I am building a wooden model lighthouse, it will stand 5 feet tall and become my driveway landmark. I have been searching for a good light circuit, a non-LED version, preferably using 120v AC. I would like the light to just do a slow flash or pulse and haven't found a circuit anywhere. I did find one SCR simple circuit using a high rated capacitor, but I am looking for more options. I have a coloured halogen which should do the job well enough. So have any of you brainiacs come across any circuits close to this description - thank you for reading / responding. Bill

Topic by bstacy37 2 years ago  |  last reply 2 years ago


Need to make very loooong lasting battery operated Mini LED light for backlit painting

For some of you brainiacs Im sure this will seem like an incredibly easy project but for me, Not my area do expertise in the least. I need to make a simple machine for part of an art project. I need to have two small LED lights placed one each on the tip of two  clock hands . I need the lit clock hands to be battery operated ( looong as possible) and flattish ( maybe an inch in depth at most for entire piece) so it can hide behind a painting. Would like it to  operate lit up and moving in clockwise circle nonstop day and night for at least a year . Any ideas?  What # volt? How to make simple clock ( besides just buying a kit? It only needs a very long hour hand with bulbs on each end ( say 12 oclock and 6 oclock) Where to get small ( 1/8 to 1/4" diameter)  long lasting LED bulbs? As I said before, I am an absolute amateur here!  Thank you. Maggie 

Topic by Memtobin 5 years ago