If you’ve been performing painstaking hair-plug procedures on your 3D-printed troll dolls, then prepare to have your world rocked! [Chris Harrison, Gierad Laput, and Xiang “Anthony” Chen] at Carnegie Mellon University have just released a paper outlining a technique they’ve developed for 3D printing fur and hair. Will the figurine section of Thingiverse ever be the same?
The technique takes advantage of a 3D printing effect that most hobbyists actively try to avoid: stringing. Stringing is what happens when the hot end of a 3D printer moves from one point to another quickly while leaking a small amount of molten filament. This results in a thin strand of plastic between the two points, and is generally perceived as a bad thing, because it negatively affects the surface quality of the print.
To avoid this particular phenomenon, 3D printing slicers generally have options like retraction and wiping. But, instead of trying to stop the stringing, [Chris Harrison, Gierad Laput, and Xiang “Anthony” Chen] decided to embrace it. Through extensive experimentation, they figured out how to introduce stringing in a controlled manner. Instead of random strings here and there, they’re able to create strings exactly where they want them, and at specific lengths and thicknesses.
Examples of what this can be used for are shown in their video below, and include adding hair to figurines or bristles to brushes. Of course, once this technique becomes readily available to the masses, the 3D printing community is bound to find unexpected uses for it.
Continue reading “Hair Enthusiasts Rejoice! Synthetic Follicles Are Now 3D-Printable”
HowToLou is back with a rather interesting build: One hundred laser diodes for hair growth.
Before you guffaw at the idea of lasers regrowing hair lost to male pattern baldness, there’s a surprising amount of FDA documents covering the use of laser diodes and red LEDs for hair growth and an interesting study covering teeth regrowth with lasers. Yes folks, it’s a real thing, but something that will never get a double-blind study for obvious reasons.
[Lou] is building his hat with 100 laser diodes, most of which were sourced from Amazon. These diodes were implanted in a piece of foam flooring, a rather interesting solution that puts dozens of diodes in a flexible module that’s pretty good for making a wearable device.
The lasers are powered by three AA batteries, stuffed into a four-slot battery holder that was modified to accommodate a power switch. [Lou] has been wearing a nine-diode hat for a month now, and if the pictures are to be believed, he is seeing a little bit of hair growth. At the very least, it’s an interesting pseudo-medical build that seems to be producing results.
Hats like these are commercially available for about $700. [Lou] built his for about $60. We’re calling that a win even if it doesn’t end up working to [Lou]’s satisfaction. Just don’t look at the lasers with your remaining eye.
Continue reading “Using Lasers for Hair Growth”
Power for your breadboards. It’s a USB connector, a 3.3V voltage regulator, and a few pins that plug into the rails of a breadboard.
“Have you seen those ‘Portable battery chargers for smartphones?’ Well the idea of the device is based on it , but the difference here is the internet part.” That’s a direct quote from this Indiegogo campaign. It’s funny because I don’t remember losing my damn mind recently. Wait. It’s $200. Yep. Yep. Definitely lost my mind there.
Putting the Internet on a USB stick not weird enough? Hair Highways. Yep, human hair. It’s just embedding human hair into resin, cutting everything up into plates, and assembling these plates into decorative objects. As a structural material, it’s probably only as strong as the resin itself, but with enough hair set in layers perpendicular to each other, it would be the same idea as fiberglass. Only made out of hair.
Tesla is building a $30,000 car and Harley is building an electric motorcycle. The marketing line for the bike will probably be something like, “living life on your own terms, 50 miles at a time”.
PixelClock? It’s a 64×64 array of red LEDs built to be a clock, and low-resolution display. It looks blindingly bright in the video, something that’s hard to do with red LEDs.
[Katrin Baumgarten] has fourteen switches that are made to gross you out. From a button that retreats into its hole as your finger approaches, to a mysterious goo-oozing faceplate, to a hairy housing that gets aroused as your try to flip it on, the intrigue is enough to get you to try out the next creepy node in the network. There’s a clip of several different switches after the break and if that’s not enough she’s got more on her Vimeo channel.
Continue reading “That light switch is disgusting!”
Reader [unangst] pointed out to us an article in the U.K.’s Daily Mail, where a teenager from Nepal had managed to create a 9v, 18W solar panel using human hair rather than the usual semiconductors (usually crystalline-silicon). The complex silicon in solar panels are what keep the prices out of reach of developing nations, and while there are a number of new technologies that are helping bring down the cost, [Karki] managed to make his solar panel for only £23 (roughly $38). He also claims that when mass produced the price could drop substantially down to under $10 a panel, which would shatter the $1/watt sweet spot.
The melanin in hair acts as an organic-semiconductor, and while the hair does not have the longevity that silicon panels have (months rather than years), these panels can be made cheaply and serviced with little to no complex knowledge. Using melanin as an organic semiconductor seems to be a newer idea, because information seems hard to come by, but we managed to find a research paper from 2007 that explored the energy absorption attributes of melanin, as well as some good background info for the science types.
Research Paper (Warning: PDF)
So, Hack a Day readers, which one of you is going to make your home-brew solar panels first? Let us know when you do.