This Pixel Kit Will Let You Play Tetris With Jellyfish DNA

Cell Free Technology
Cell Free Technology

Forget playing Tetris on your phone. Now you can play it with jellyfish DNA. Bixels is a DIY game kit that lets you code your own games using synthetic biology, lighting up a digital display with the help of DNA.

Its 8-by-8 pixel grid is programmed to turn on with the help of the same protein that makes jellyfish glow, called green fluorescent protein (GFP). But you can program it to do more than just passively shine. You can use your phone and the associated app to excite Bixels' fluorescent proteins and make them glow at different frequencies, producing red, blue, and green colors. Essentially, you can program it like you would any computer, but instead of electronics powering the system, it's DNA.

Two blue boxes hold Bixel pixel grids.

Researchers use green fluorescent protein all the time in lab experiments as an imaging agent to illuminate biological processes for study. With Bixels, all you need is a little programming to turn the colorful lights (tubes filled with GFP) into custom images or interactive games like Tetris or Snake. You can also use it to develop your own scientific experiments. (For experiment ideas, Bixels' creator, the Irish company Cell-Free Technology, suggests the curricula from BioBuilder.)

A screenshot shows a user assembling a Bixel kit on video.

A pixel kit is housed in a cardboard box that looks like a Game Boy.

Bixels is designed to be used by people with all levels of scientific knowledge, helping make the world of biotechnology more accessible to the public. Eventually, Cell-Free Technology wants to create a bio-computer even more advanced than Bixels. "Our ultimate goal is to build a personal bio-computer which, unlike current wearable devices, truly interacts with our bodies," co-founder Helene Steiner said in a press release.

Bixels - Play tetris with DNA from Cell-Free Technology on Vimeo.

You can buy your own Bixel kit on Kickstarter for roughly $118. It's expected to ship in May 2018.

All images courtesy Cell-Free Technology

The Reason Why Your Car’s Turn Signal Makes a Clicking Sound

Zmaj88, iStock / Getty Images Plus
Zmaj88, iStock / Getty Images Plus

The clicking of a turn signal ranks among the least-annoying sounds a car can make. Along with the flashing bulb behind the arrow in your car's dashboard, the gentle, rhythmic tick tick tick-ing tones are a sign that your blinker is working properly when you switch it on. Even as technology has progressed, this feature has remained a constant throughout generations of vehicles—or at least that's how it appears to drivers. According to Jalopnik, there's one thing that has changed, though: the actual source of that familiar sound.

The flashing turn signals began appearing in automobiles in the late 1930s when Buick made them standard in some models. Traditionally, the clicking sound is made via heat. Drivers would switch on their blinker, and the electricity would heat up a bimetallic spring in the car, causing it to bend until it made contact with a small strip of metal. When these two components connected, a current would pass through them and power the electric turn signal lights. The bimetallic spring quickly cooled down and returned to its original form, turning off the light, before the whole process started again to create a new flash. As the spring bent back and forth, it created a clicking sound.

The next evolution of turn signals used a similar trick, but instead of moving a spring due to heat, it sent the electronic pulse to an electromagnet via a chip. When activated, the electromagnet pulled up a metal armature and disconnected the current powering the light (or the opposite, depending on the relay setup). Without the pulse from the chip, the electromagnet turned off and the armature returned to old position and bridged the circuit providing power to the bulbs. As was the case with the thermal spring, the relay clicked every time it moved.

Up until recently, this was how most car turn signals functioned, but things have changed as cars have become more computerized. Many car manufactured today rely on computer commands to activate their turn signals, skipping processes that once produced the distinctive clicks. But the clicking sounds are something people grew up with, and drivers might be unsettled if they heard nothing after activating their blinkers. That's why the mechanical sound still exists in the computer era—even though in many modern cars, it's actually just being broadcast through the vehicle's audio system.

For a visual of how electronic flasher signal systems work in cars, check out the video below.

[h/t Jalopnik]

Sony Is Celebrating the Walkman’s 40th Birthday With a Retrospective Exhibition in Tokyo

Joost J. Bakker, Wikimedia Commons // CC BY 2.0
Joost J. Bakker, Wikimedia Commons // CC BY 2.0

Before the dawn of CD players, mp3 players, and iTunes, cassette tape players dominated the music scene. The Walkman was the most prolific among them, and as designboom reports, Sony is hosting a retrospective to celebrate the 40th anniversary of the gadget's debut.

The Walkman first appeared in stores in Japan on July 1, 1979—just a few months after Sony cofounder Masaru Ibuka (who had already retired at that point) asked Sony executives to create a lightweight cassette player that would allow him to listen to music on long flights. The product was an instant hit, helping make cassette tapes more popular than vinyl and introducing many consumers to portable, personal devices for the first time.

Four decades later, the Walkman is no longer the hottest music technology on the market, but its impact on the industry is undeniable. Sony's new exhibit, titled "#009 WALKMAN IN THE PARK 40 Years Since the Day the Music Walked," explores that legacy. At Ginza Sony Park in Tokyo's Ginza district, visitors can experience the exhibit in two parts. The first is "My Story, My Walkman," which features the stories of 40 celebrities whose lives were changed by the Walkman. The second section is a "Walkman Wall" where about 230 models of the Walkman, from the original cassette players to CD and MP3 players, are on display.

The exhibit opened on July 1, the Walkman's anniversary, and will continue through September 1. Anyone can explore the Tokyo retrospective for free from 10 a.m. to 8 p.m.

[h/t designboom]

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