THE THERMOCHROMIC DISPLAY YOU DIDN’T KNOW YOU NEEDED

We love unique ways of displaying data here at Hackaday, and this ingenious thermochromic display created by [Moritz v. Sivers] more than fits the bill. Using sheets of color changing liquid crystals and careful temperature control of the plates they’re mounted on, he’s built a giant seven-segment display that can colorfully (albeit somewhat slowly) show the current temperature and humidity. The sheets of t ...

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SUNTRACKER OPTIMIZES SOLAR PANELS WHILE VISUALIZING SUN’S PATH

If you have solar panels, you want soak up as much sunshine as you can to get your money’s worth. If you don’t have space for a lot of panels, the next best thing is repositioning the panels to catch the most rays. For his entry into the Hackaday Prize, [Frank] built a gorgeous solar tracker prototype to both validate his theories and to serve as a learning platform. A solar tracker’s purpose is — you guess ...

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3.5A Unipolar Stepper Motor Driver

Compact Unipolar stepper motor driver can drive unipolar motor up to 3.5A and supply range 10 To 50V DC. This compact board is based on STK672-440BN IC from ON semiconductor. The STK672-440BN is a hybrid IC for use as a unipolar, 2-phase stepper motor driver with PWM current control with Micro-stepping. Note: This Board can work with motor supply up to 36V DC, for 50V DC Supply Remove IC U2 LM317, and provi ...

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FeatherWing DC motor and stepper add-on board

Adafruit is now offering an assembled DC Motor + Stepper FeatherWing add-on board priced at $21.50 enabling you to use 2 x bi-polar stepper motors or 4 x brushed DC motors (or 1 stepper and 2 DC motors) with the companies FeatherWing range of controllers. Since the FeatherWing only uses the I2C (SDA & SCL pins), it works with any and all Feather boards currently available. Motor FeatherWing specificatio ...

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AN EXOSKELETON ARM FOR A HACKER ON A BUDGET

Whether it is motivated by a dream of superhuman strength courtesy of a mech suit or of mobility for those with impaired muscle function, the powered exoskeleton exerts a curious fascination among engineers. The idea of a machine-augmented human body achieving great things is thwarted though by the difficulty of the task, actuators and power sources small enough to be worn comfortably represent a significan ...

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FAIL OF THE WEEK: THE ARDUINO WALKIE THAT WON’T TALKIE

There’s something seriously wrong with the Arduino walkie-talkie that [GreatScott!] built. The idea is simple: build a wireless intercom so a group of motor scooter riders can talk in real-time. Yes, such products exist commercially, but that’s no fun at all. With a little ingenuity and a well-stocked parts bin, such a device should be easy to build on the cheap, right? Apparently not. [GreatScott!] went wi ...

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PERSISTANCE OF VISION ON AN OLD FAN

Persistance of vision is a fun feature of the human visual system, which allows us to blink a bunch of spinning LEDs at the right time to spell out messages that appear to hang in the air. [TN_Inventor] took a stab at his own POV build, using an old desk fan as a base. The initial build relied on a rotor made of MDF and some very old-school LEDs. The rotor was heavy and unbalanced, causing issues for the mo ...

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MAKING INSTANT RAMEN A BIT MORE INSTANT

Instant ramen, the favoured repast of the impecunious would-be tech genius! It’s cheap, of dubious nutritional value, and it only takes a minute to cook. But what if you are in the creative Zone to the extent that five minutes to boil water is too much? For that you need an automatic ramen cooker, which is what [Mayermakes] has created from an upcycled electric filter coffee maker. A filter coffee maker is ...

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Global Ultrasonic Range Finder Market Key Players 2019 – Arduino, DFRobot, MaxBotix, Robot Electronics, Saic Motor

The Global Ultrasonic Range Finder Market research report provides an effective industry outlook, future trends and dynamics for market growth rate, market size, trading and key players of the industry’s information with forecast. The market has been forecasted based on revenue (US$ Mn) and volume (in thousand units) from 2019 to 2023. The report provides key information regarding market size, market share, ...

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THIS ARDUINO IS FEEDING THE FISHES

Fish are easy to keep as pets, requiring little more than regular feeding to keep them happy in the short-to-medium term. If you’re going on holiday, it can be nice to know that your pets are being taken care of, but finding someone to take on the chore can be hard. [Trevor_DIY] doesn’t need to worry about that, however – he’s built an automatic feeder to handle the job. The build uses an Arduino Uno as the ...

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AUTOMATIC CUT-OFF SAW TAKES THE TEDIUM OUT OF A TWENTY-MINUTE JOB

For [Turbo Conquering Mega Eagle], the question was simple: Do I spend 20 minutes slaving away in front of a bandsaw to cut a bunch of short brass rods into even shorter pieces of brass rod? Or do I spend days designing and building an automatic cutoff saw to do the same job? The answer is obvious. It’s only at the end of the video below that [TCME] reveals the need for these brass bits: they’re for rivetin ...

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TRICK SHOT BOT FLINGS BALLS INTO WINE GLASS EVERY TIME

We’ve heard of beer pong, but we’re not sure we’ve heard of wine pong. And certainly never wine pong automated with a ping pong ball throwing robot like this one. There’s not a huge amount of detail available in the video below, and no build log per se. But [Electron Dust] has a few shots in the video that explain what’s going on, as well as a brief description in a reddit thread about the de ...

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