Cafe Phin Composer turns drops of Vietnamese coffee into live-generated music. Sensors beneath the glass detect the vibration of each drop and estimate where it landed among seven positions. AI uses the timing and position to choose notes and chords while generating a song in real time. Brewing takes around five to seven minutes, enough for a track to take shape. The coffee selection also influences the musical style, and the changing drop patterns make each performance different.
The coffee spends its brewing time composing its own soundtrack. You might want to listen before taking the first sip.
Angus from Maker's Muse experimented with covering a tiny combat robot in stiff 3D-printed bristles instead of a conventional shell. The robot competes in a plastic antweight class limited to 150 grams. He printed thin strands between the body and a temporary outer support, then removed the support to expose the bristles along the sides and rear. While earlier robots had suffered broken shells, the hairy version appeared to come through combat largely intact.
Apparently one way to improve a fighting robot's defenses is to give it more hair. The lion's mane has entered the engineering department.
Maker Tucker Osman built a working Mactini, a miniature computer originally imagined in a parody of Apple's shrinking products. Its only input is a touch-sensitive pad made with conductive 3D-printing filament. Different press lengths and pauses are recognized as patterns that become letters, punctuation, or commands. The device has a small color screen, salvaged speakers, and software that can play music and video as well as accept text.
A parody of removing too many buttons has become a real computer. Typing on it sounds like performing a tiny percussion solo.
Afterglow is a homemade digital camera that locks its shutter after each photo until the user turns a winding knob. It simulates rolls of 24 exposures, with 12 and 36 also available, and requires rewinding at the end. A red-lit darkroom animation makes each photo appear to develop, while synthetic winding and shutter sounds complete the experience. The photos are actually saved to an SD card and can be transferred to a phone over Wi-Fi. Creator Nickson Kiprotich built it to bring back the ritual of film photography.
Digital photography spent decades removing the hassle of film. This camera uses electronics to lovingly put that hassle back.
A maker created an ASCII-style aquarium for a smart-home display. Fish made from characters swim across the screen, including one that shows a live sensor temperature. Home Assistant can trigger falling food that the fish chase, and users can adjust fish count and swimming speed. A Halloween mode replaces fish with pumpkins, ghosts, and other spooky icons, and a scare effect displays an image and plays a sound. The panel can also show a voice assistant's state.
A smart-home dashboard now reports the temperature through a swimming fish—and gives you virtual fish to feed.
The 'Dad Jokes of the Day' template displays a different short joke once a day on an e-paper display. Its collection currently contains 100 jokes, mostly puns and wordplay about everyday life, history, science, mathematics, animals, and more. The creator may add more jokes in the future.
A display that refreshes daily just to deliver another dad joke. A wonderfully low-stakes use of e-paper.
To beat a friend who keeps winning at badminton, Jack Saito built a motorized racket that spins rapidly to hit shuttlecocks. A single racket vibrated too violently, so he mounted a second one on the opposite side to balance the mechanism. Powered by an electric-skateboard motor and batteries carried in a backpack, it returned shots on court, but ran out of power before he could win.
Instead of practicing his swing, he engineered a spinning pair of rackets and a backpack power supply. The sporting equipment is starting to look like factory machinery.
Zach Hipps built a water-powered dot-matrix printer on the back of a Onewheel electric board. Eight solenoid valves release timed bursts of water to form letters on the pavement as the board moves. After fixing leaks and adjusting nozzle angles, he successfully printed 'KINDNESS.' Faster riding stretched the letters, so he also tuned the valve timing.
A machine built to leave graffiti, except it writes kind messages in water. The evidence disappears as soon as the pavement dries.
Inventor Kazuya Shibata built the Portable Ice Keeper, a freezer designed specifically to transport a single ice cream without melting it. He presents the creation as part of his series of barely useful inventions.
To transport one ice cream, the solution is to bring the freezer along for the ride.
Noel Friedrich created a printable worksheet and tutorial for decoding QR codes by hand. Readers copy the black-and-white modules, undo the masking pattern, and convert the data into hexadecimal digits and then text. The guide covers QR versions 1–5 in byte mode, with an estimated decoding time of 10–120 minutes.
The 'Quick Response' code becomes a slow, deliberate puzzle when you leave the scanner out of it.
Carlos Reyes built a functional version of Homer Simpson's electric hammer. The 3D-printed prototype moves the hammer back and forth automatically, after design refinements addressing friction, alignment and strength.
A lot of work went into avoiding the work of swinging a hammer.
Unnecessary Inventions created SwingStepper, a robotic swinging arm that holds a smartwatch and moves it to accumulate step counts while the wearer relaxes. The creator presents the working invention on their site.
The fitness goal gets closer while its owner stays perfectly still.
The coffee spends its brewing time composing its own soundtrack. You might want to listen before taking the first sip.