You can see that it tends to precess in the same rotational direction as the fans themselves I would like someday to try a similar build using counter-rotating fans to cancel the net torque, but it will have to use bare motors rather than all-in-one case fans, because case fans all turn the same direction and are not, to my knowledge, ever available in the opposite handedness.
On a fully-charged 150mAH NiMH 9V, it will float for about 5 minutes. Here is some heretofore unpublished video of the finished prototype in action. The 5V fans that I used in the final build ( Sunon #MB50100V2-000U-A99) are exactly the same part used in the littleBits Fan Bit (though they are deliberately overdriven at 9V). There was a lengthy prototyping process in which I tried to produce a workable styrofoam-plate hovercraft using littleBits components when it became clear that the single 5V case fan bundled with their Premium Kit was not going to be able to lift its own weight, I pushed forward anyway, adding fans and stripping away other components as needed until I got to a reliable power-to-weight ratio. It was inspired by the well-known “Kelvin” hovercraft activity developed for primary-school STEM educators.
Flickery flame kit series#
This project actually started as one of six ideas I sent to littleBits when I began negotiating to develop projects for their Explorer Series kits in late 2014. Of course I knew for months in advance that this was coming, but what I did not know, until I actually received my copy of the March 2015 print issue, was that I also got a coverline. Posted in By-lines, Electronics, Print | Tagged EMSL, halloween, PopSci Styrofoam Plate Hovercraft: My Debut in Popular Science
Here’s Popular Science Projects Editor Sophie Bushwick building the project on camera: Their online store remains the best place to buy candle-flicker and other specialty LEDs in the known universe, as well as tons of other cool open-source electronics you can’t get anywhere else. My breadboard is really just a simple mash-up of their dark detecting jack-o’-lantern and solderless flickery flame designs.
I’m indebted to Lenore and Windell at Evil Mad Scientist Laboratories for the two circuits on which the electronics are based. It carves easily with a special tool which is somewhere between a paring knife and a fine-tooth hacksaw. There is, however, a high quality brand of carve-able fake pumpkin, called a Funkin, which is apparently the industry standard for this sort of thing. Fun fact: Halloween magazine content has to be in bed in the summer, when nobody is selling pumpkins. Besides designing the circuit, writing the copy, and building the solder-free breadboard-based device shown in the photo, I also carved the pumpkin.
It opens the “Manual” section of the October 2015 issue. Also a very good option for gifting, Safety Comes First:- Our flameless flickering candles are operated by batteries, there is no danger of fire, glow to any room safely, even in the presence of small children and pets.This piece marks my third by-line in Popular Science. It can be used for home decor, dinner table, wedding decors and parties. These LED candles are modern and create romantic mood to any surrounding. Each set includes a small battery box with ON/Flash/OFF button., Modern And Romantic:- Fire candles are old now. Realistic:- These LED Pillar candles resemble perfectly to live flame candles, Moving wick technology replicates the flame shape and function as original, The Package Contains:- Set of 4 Flameless Flickering Pillar Dripping Wax Design Candle with Stand - Battery Operated (Battery Not Included for the safe product shipping, Long Working Time:- 2 AAA new batteries operated (not included) the Fairy lights will provide lighting for 30 hours.
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