Schlagwort: Uno

  • Researchers develop a simple logger for greenhouse gas flows

    Researchers develop a simple logger for greenhouse gas flows

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    Researchers develop a simple logger for greenhouse gas flows

    Arduino Team — July 28th, 2020

    Researchers at Linköping University in Sweden have developed an Arduino-based logger to measure levels of methane and carbon dioxide in greenhouse environments. The device also implements a DHT22 temperature and humidity sensor, data from which can be correlated with gas readings. Figures are stored on an SD card using an Adafruit data logging shield.

    Importantly, the team’s study outlines a procedure for calibrating the methane sensor module at atmospheric concentrations, much lower than its normal use. The entire unit can be made for around €200, or about $235 USD. While an inexpensive method for monitoring CO2 has been available for some time, this fills in the need for a low-cost methane sensor that could be used for distributed measurements.

    More information on the greenhouse gas logger can be found in the researchers’ paper.

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    Website: LINK

  • This ‘crazy’ spectrum analyzer visualizes tunes with four Arduinos and 504 LEDs

    This ‘crazy’ spectrum analyzer visualizes tunes with four Arduinos and 504 LEDs

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    This ‘crazy’ spectrum analyzer visualizes tunes with four Arduinos and 504 LEDs

    Arduino Team — July 26th, 2020

    Spectrum analyzers are a great way to visualize music, and “TUENHIDIY” came up with an interesting take on this device using not one, but four Arduino Unos.

    Each board receives the same sound input via a 3.5mm audio jack, and separately processes it to break out the left and right channels, as well as upper and lower frequency ranges using fast Fourier transforms, or FFTs.

    36 different bands are shown on four LoL Shields, with each 9×14 Charliexplexed LED matrix attached to an Uno, for a total of up to 504 individual points of light. Everything is put together on an acrylic plate, and powered by a portable USB battery.

    TUENHIDIY is quick to note that it’s a “crazy project,” but as seen in the video below, it looks like a lot of fun!

    [youtube https://www.youtube.com/watch?v=uB-a2VwH_34?feature=oembed&w=500&h=281]

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  • This Arduino-powered machine folds your shirts at the push of a button

    This Arduino-powered machine folds your shirts at the push of a button

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    This Arduino-powered machine folds your shirts at the push of a button

    Arduino Team — July 21st, 2020

    Inspired by an old FlipFold TV ad, YouTuber Ty Palowski decided to make his own automated shirt folding machine.

    Palowski’s device is made in four folding sections, which lie flat to accept the unfolded piece of laundry. When the shirt is properly placed, a capacitive touch sensor starts the process, which is controlled via an Arduino and motor drivers.

    Two motors bring in the sides sequentially, then a third motor flips the bottom up. Activation is based simply on timing, with no sensor feedback. As seen at the end of the video, the project does save folding time and it works even better once Palowski gets some practice with it!

    [youtube https://www.youtube.com/watch?v=rhWaHSUVGco?feature=oembed&w=500&h=281]

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    Website: LINK

  • Creating a convenient calculator for unit conversions

    Creating a convenient calculator for unit conversions

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    Creating a convenient calculator for unit conversions

    Arduino Team — July 19th, 2020

    Whether you work in meters, feet, inches, or kilometers — or any number of other units corresponding to properties that you need to convey — conversions are a fact of life when making things. While this could mean pulling up a Google tab or flipping open a Machinery’s Handbook and doing a few hand calculations, neither is particularly convenient for shop use.

    As an alternative, Kaleb Clark over at element14 came up with a dedicated desktop conversion calculator using an Arduino Uno and Cherry MX switches in a matrix arrangement as the main input method. A rotary encoder is also implemented to swap between functions and output is via a 4×20 LCD screen.

    Although the device still needs a bit of programming work to be called “complete,” it’s currently able to handle an impressive variety of conversions.

    [youtube https://www.youtube.com/watch?v=eqpzVRJ7RbY?feature=oembed&w=500&h=281]

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  • A 7-foot-tall 7-segment display

    A 7-foot-tall 7-segment display

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    Seven-segment displays are normally diminutive items, able to show info from a clock or other device, in a size that’s easily tucked away when not needed. Jegatheesan Soundarapandian’s single-digit display, however, is just the opposite standing at nearly seven feet tall.

    The project is constructed out of cardboard, with a PVC spine for extra strength. Inside, addressable LED lighting illuminates each segment under Arduino control, with an HC-05 module used to interface with an Android app. Two 18550 batteries provide power for the unit, along with a DC-DC voltage regulator to supply the strip with 5V.

    You can see it demonstrated in the clips below!

    [youtube https://www.youtube.com/watch?v=LKxuMsX9yzM?feature=oembed&w=500&h=281]

    [youtube https://www.youtube.com/watch?v=9Od_xC0A3ww?feature=oembed&w=500&h=281]

    [youtube https://www.youtube.com/watch?v=SJIlTgb6L48?feature=oembed&w=500&h=281]

    [youtube https://www.youtube.com/watch?v=AXmfMuW09lM?feature=oembed&w=500&h=281]

    Boards:Uno
    Categories:Arduino

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    Website: LINK

  • Robotic cornhole board guarantees three points every time

    Robotic cornhole board guarantees three points every time

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    Robotic cornhole board guarantees three points every time

    Arduino Team — July 8th, 2020

    You may have seen Mark Rober’s automated dartboard or Stuff Made Here’s backboard, which use advanced engineering to create apparatuses that ensure you “can’t miss.” Now that summer is in full swing, what about a robotic cornhole board?

    Michael Rechtin decided to take on this challenge using a webcam pointed at the sky for sensing and DC motors that move the board along an X/Y plane on a set of sliding drawer rails.

    When a bean bag is thrown, the camera feeds the video over to a laptop running a Processing sketch to analyze its trajectory and passes adjustment info to an Arduino. This then controls the motors for repositioning, which attempts to predict where the bag will land and guide it into the hold for three points!

    [youtube https://www.youtube.com/watch?v=FkhxhMJtkHA?feature=oembed&w=500&h=281]

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  • This robo-dog sprays poison ivy with weed killer

    This robo-dog sprays poison ivy with weed killer

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    This robo-dog sprays poison ivy with weed killer

    Arduino Team — July 1st, 2020

    Poisonous plants, like poison ivy, can really ruin your day. In an effort to combat this “green menace,” YouTuber Sciencish decided to create his own quadruped robot.

    The robotic dog is equipped with two servos per leg, for a total eight, which enable it to move its shoulders and elbows back and forth.

    An Arduino Uno controller determines leg positions via trigonometric calculation, and when in position, it dispenses weed killer via a relay and aquarium pump setup. The reservoir can also be used to hold other liquids, whether for watering duties or even to provide extra fuel to a fire.

    [youtube https://www.youtube.com/watch?v=gm-EslOemfE?feature=oembed&w=500&h=281]

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  • A tabletop bowling game with automated scoring

    A tabletop bowling game with automated scoring

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    A tabletop bowling game with automated scoring

    Arduino Team — June 24th, 2020

    Do you love to bowl? Are you still unable to do so due to the pandemic? Then this project by high school engineering teacher “lainealison” is right up your alley!

    This rig features a 5½ foot (1.68 meter) lane made of MDF, along with ball bearings used to strike miniature pins. Each pin is arranged on top of an LDR sensor, which detects whether a pin remains in place or if it has been knocked over via 10 LEDs shining from overhead.

    An Arduino Uno uses pin presence information to output game stats, automatically displaying the frame, ball and score on an I2C LCD screen.

    You can find more on the project, including code and construction details, in lainealison’s write-up.

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    Website: LINK

  • Building an Arduino-based bipedal bot

    Building an Arduino-based bipedal bot

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    Building an Arduino-based bipedal bot

    Arduino Team — June 21st, 2020

    If you’d like to build a walking biped robot, this 3D-printed design by Technovation looks like a fantastic place to start. Each leg features three servos that actuate it at the hip, knee, and ankle for a total of six degrees of freedom.

    Control is handled by an Arduino Uno board that rides on top of the legs, along with a perfboard to connect to the servos directly.

    Movements are calculated via inverse kinematics, meaning one simply has to input the x and z positions, and the Arduino calculates the proper servo angles. The bot is even able to take steps between two and 10 centimeters without falling over.

    [youtube https://www.youtube.com/watch?v=CxociTjzR4Q?feature=oembed&w=500&h=281]

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  • This ephemeral display shows messages using floating bubbles

    This ephemeral display shows messages using floating bubbles

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    This ephemeral display shows messages using floating bubbles

    Arduino Team — June 19th, 2020

    While electronics and water don’t generally mix, researchers at Ochanomizu University in Japan have come up with an ephemeral display method that uses floating clusters of bubbles to show messages on a liquid surface.

    The device, known as UTAKATA, utilizes a line of seven electrodes under Arduino Uno control that activate to form hydrogen bubbles via electrolysis. When arranged properly, these bubbles can be made to produce letters and words, which as shown in the video below, dissipate as they flow downstream in the container.

    UTAKATA follows previous work where a static configuration of bubbles was used as the output. This water output gives a much better refresh rate, along with an interesting visual effect.

    More details are available in the researchers’ paper.

    [youtube https://www.youtube.com/watch?v=2q6C9iIaIuY?feature=oembed&w=500&h=281]

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    Website: LINK

  • Arduino-based inkjet printer slowly but surely gets the job done

    Arduino-based inkjet printer slowly but surely gets the job done

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    Arduino-based inkjet printer slowly but surely gets the job done

    Arduino Team — June 16th, 2020

    As a prototype for a continuously printing art project, Norbert (AKA “HomoFaciens”) has built an inkjet printer that uses an Arduino and the mechanics of a discarded 3D printer to slowly generate black and white images. 

    The hacked together assembly mounts the Uno, associated electronics, and an HP 6602 cartridge onto a piece of hardboard, which is attached to the X-axis assembly of the former 3D printer. 

    Print height is set by manual manipulation of the Z-axis. The Arduino can then move the printer in the X/Y direction via the two steppers, and print by passing current to the cartridge’s nozzles in short bursts. 

    “The electronics consist of a computer power supply that provides 12V DC, a boost-up converter that raises this voltage to 18V, an Arduino UNO that generates the control pulses and two ULN2803 chips that convert the 5V of the GPIOs to 18V level.”

    As seen in the video below, the contraption appears to work well after some experimentation. 

    [youtube https://www.youtube.com/watch?v=DBI1H7KUqE0?feature=oembed&w=500&h=281]

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  • This Mad-Eye relies on Arduino, not magic

    This Mad-Eye relies on Arduino, not magic

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    This Mad-Eye relies on Arduino, not magic

    Arduino Team — June 14th, 2020

    In the Harry Potter series, professor Alastor Moody is known for wearing a very distinct prosthetic eyeball that moves in a “mad” manner. When Instructables member replayreb’s son decided to go to a costume party dressed as this character, he took the opportunity to make a replica for him. 

    The device is controlled by an Arduino Uno stored in a wearer’s pocket and transmits signals to the eyepiece via a 3.5mm stereo jack. A servo then actuates half of a ping pong ball decorated with an iris and pupil to create the Mad-Eye effect. 

    A potentiometer is also hooked up to the Uno, allowing the mock Moody to complement the motion of the fake eye with the one that’s exposed.

    [youtube https://www.youtube.com/watch?v=KQmenKljKtk?feature=oembed&w=500&h=281]

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  • No string attaches this tin can telephone

    No string attaches this tin can telephone

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    No string attaches this tin can telephone

    Arduino Team — June 9th, 2020

    Geoff (AKA Facio Ergo Sum) has created a new take on the classic “tin can telephone,” using an Arduino and nRF24L01 transceiver to pass audio signals instead of a physical string. 

    The build and testing process are outlined in the video below, including poking holes for an antenna and talk button, as well as hot gluing everything in place.

    More specifics can be found in Geoff’s project write-up, and along with the RF unit, it uses an Uno to run a transmission program. Batteries, a speaker, an amp, and a microphone are also implemented, enabling a pair of these cans to communicate from what appears to be well over 100 meters away.

    [youtube https://www.youtube.com/watch?v=E-2zu7KqG40?feature=oembed&w=500&h=281]

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  • Monitoring CPU usage with an Arc Reactor

    Monitoring CPU usage with an Arc Reactor

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    Monitoring CPU usage with an Arc Reactor

    Arduino Team — June 3rd, 2020

    Iron Man Arc Reactors have brought joy to makers of all ages, whether as something cool on a movie screen, as a hacked together light assembly, or even a cosplay prop created from a DIY kit. Michael Klements decided to turn one of these kits into something more, by hooking it up to act as a CPU performance monitor for his computer.

    His handy desktop device runs a Python script on the monitored PC, which passes along CPU information over serial to an Arduino Uno. The Uno pulses the Arc Reactor in proportion to the computer load using a transistor, with higher frequency pulses indicating a heavily loaded CPU and lower frequencies for lower CPU usage. An OLED display is also implemented for numerical feedback, and everything is housed in a nice 3D-printed stand.

    [youtube https://www.youtube.com/watch?v=KsSESewvJc0?feature=oembed&w=500&h=281]

    More details, including files and code, are available in Klements’ blog post. 

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    Website: LINK

  • Meet TELEBOT, the terrifying telepresence robot

    Meet TELEBOT, the terrifying telepresence robot

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    Meet TELEBOT, the terrifying telepresence robot

    Arduino Team — June 1st, 2020

    The Internet has been perhaps more important than ever to keep us connected these days. Available technology, however, apparently wasn’t good enough for brothers Hunter and Josh Irving, who built their own telepresence robot using parts on-hand during their own two-person hackathon.

    The robot they came up with, dubbed TELEBOT, features a partially 3D-printed face along with a set of chattering teeth and eyes recycled from an antique doll. An Arduino Uno is used to take audio signals from remote “guests” via a standard 3.5mm cable, simulating their facial expressions with servos that drive TELEBOT’s mouth and LED-lit eyes. 

    The duo also made TELEBOT’s “body” out of an adjustable lamp for manual movement. And, as an added bonus, the device is capable of glowing in the dark and can be customized with a wizard, cowboy or top hat. 

    While it might not be the most comforting robot you’ve ever seen, it looks like a fun build! 

    [youtube https://www.youtube.com/watch?v=XXLaeMre5Ac?feature=oembed&w=500&h=281]

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  • GoodBoy is a robot dog that runs on Arduino

    GoodBoy is a robot dog that runs on Arduino

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    GoodBoy is a robot dog that runs on Arduino

    Arduino Team — May 27th, 2020

    Daniel Hingston wanted to build a four-legged walking robot for several years, and with current coronavirus restrictions he finally got his chance. His 3D-printed robodog, dubbed “GoodBoy,” is reminiscent of a miniature version of Boston Dynamics’ Spot, which helped inspire the project. 

    It’s extremely clean, with wiring integrated into the legs mid-print. Two micro servos per leg move it in a forward direction, controlled by an Arduino Uno.

    Obstacle avoidance is provided by a pair of ultrasonic sensor “eyes,” allowing it to stop when something is in its path. An LDR sensor is also implemented, which when covered by its human minder commands it to present its paw for shaking.

    Be sure to check out a short demo of GoodBoy below! 

    [youtube https://www.youtube.com/watch?v=uE5hZhkQkwI?feature=oembed&w=500&h=281]

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  • This cycling game is controlled by a real bike

    This cycling game is controlled by a real bike

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    This cycling game is controlled by a real bike

    Arduino Team — May 26th, 2020

    What is one to do when stuck indoors due to bad weather or other circumstances, without the ability to ride your beloved bicycle? If you’re game designer Jelle Vermandere, you build your own cycling simulator as seen in the clip below. 

    Vermandere not only created a computer simulation in Unity, but a custom Arduino Uno rig that allows him to use his actual bike as the controller.

    The game features procedurally-generated maps, along with competitors using Vermandere’s own likeness scanned in as the model. When the racing begins, wheel speeds are sensed via a magnetic window sensor and steering is handled by a LEGO potentiometer rig. 

    The game (without its unique interface) is playable now on your browser, while code is available on GitHub.

    [youtube https://www.youtube.com/watch?v=95HjdLhC9jU?feature=oembed&w=500&h=281]

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  • AirTouch: Pneumatic sensing for 3D prints

    AirTouch: Pneumatic sensing for 3D prints

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    AirTouch: Pneumatic sensing for 3D prints

    Arduino Team — May 22nd, 2020

    3D printing allows us to make a wide variety of shapes, but adding interactive features generally means somehow strapping various electronics to them. The AirTouch project, however, presents an alternative option by enabling a fabricated object to sense up to a dozen different touch points with no components or complex calibration necessary. 

    Instead compressed air is pumped into the 3D-printed item, which escapes via up to 12 tiny holes. As each hole is touched, a barometric sensor picks up the pressure response, which is then interpreted by an Arduino Uno board as user input. 

    The system has been tested on a variety of interactive figures, from a model rabbit to a bar graph. A short demo can be seen below, while the project’s research paper is found here.

    [youtube https://www.youtube.com/watch?v=ZI7U3BA6GrQ?feature=oembed&w=500&h=281]

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  • Create your own crack the code game with an Arduino-controlled safe

    Create your own crack the code game with an Arduino-controlled safe

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    Create your own crack the code game with an Arduino-controlled safe

    Arduino Team — May 22nd, 2020

    Michael Klements’ laser-cut, Arduino-controlled “safe” may not be the most secure model that you can find, but it certainly makes for a very entertaining puzzle. 

    Users can place whatever “treasure” they want hidden inside, shut the door, and press a rotary encoder button to lock it via a micro servo. They then must decipher a randomly generated four-digit code to get it open again.

    Number guesses are input using the encoder dial on the front, which are displayed by a small OLED I2C screen. Green and red LEDs provide feedback as to how many digits are correct and if they’re in the right position, eventually letting users figure out where everything goes by a process of elimination.

    [youtube https://www.youtube.com/watch?v=33jPNMU3N5Q?feature=oembed&w=500&h=281]

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  • mechDOG, a 12-servo robotic pup

    mechDOG, a 12-servo robotic pup

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    mechDOG, a 12-servo robotic pup

    Arduino Team — May 18th, 2020

    Mech-Dickel Robotics has designed a beautiful quadruped robot dubbed mechDOG, which utilizes a dozen servos for motion. This gives each leg three degrees of freedom, allowing the cat-sized beast to travel a meter in 8.46 seconds. While it won’t break any speed records, creating a walking motion on this sort of unstable platform is an impressive feat in itself.

    mechDOG is controlled by an Arduino Uno, while a Lynxmotion Smart Servo Adapter Board interfaces with the servos themselves. The device is remote-controlled via an RF unit, though it does have a pair of ultrasonic sensors that presumably could be used for obstacle avoidance. 

    You can check it out in action in the videos below, looking sharp in its yellow-finished aluminum sheet metal chassis.

    [youtube https://www.youtube.com/watch?v=i-wuqwJ5QNY?feature=oembed&w=500&h=281]

    [youtube https://www.youtube.com/watch?v=_6UpOW29lDs?feature=oembed&w=500&h=281]

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  • BiTipText enables text entry across two index finger-worn keyboards

    BiTipText enables text entry across two index finger-worn keyboards

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    BiTipText enables text entry across two index finger-worn keyboards

    Arduino Team — May 5th, 2020

    Typing with your thumbs on a smartphone has become an everyday activity for many, but what if you could enter text by simply tapping on your index fingers? With BiTipText, that may soon be a reality. 

    The researchers’ prototype consists of an interactive skin overlay made out of flexible PCB material, allowing an Arduino Uno and MPR121 sensor chip to read capacitive signals from both digits. 

    In testing, users were able to enter text at over 23 WPM, with a 0.03% uncorrected error rate. Notably, the two-handed implementation means that software can determine not only the position of presses, but the sequence of left/right inputs to help with word interpretation.

    More details on the bimanual text input method can be found in the team’s paper here.

    [youtube https://www.youtube.com/watch?v=FzUTmGzAHQw?feature=oembed&w=500&h=281]

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  • WraPr is a spool-based system for creating and modifying 3D objects

    WraPr is a spool-based system for creating and modifying 3D objects

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    WraPr is a spool-based system for creating and modifying 3D objects

    Arduino Team — April 24th, 2020

    When you purchase a spool of thread or wire, you expect it to be relatively uniform, spun in place with automated machinery that has been developed over hundreds of years. Researchers from MIT’s Media Lab, however, have come up with what could be the next step in this type of equipment’s development. Known as “WraPr,” the system presents a novel fabrication method for creating new or augmenting existing 3D objects with soft materials.   

    The device uses a pair of Arduino Uno boards to control the deposition of the thread, yarn, wire, or other string-like filament on a spool, allowing it to produce non-uniform shapes that would otherwise be impractical. Design is assisted by a RealSense D415 depth camera, enabling a user to draw these shapes freeform, trace existing items, or even make coils for electric applications.

    More details on WraPr can be found in the team’s paper here. 

    [youtube https://www.youtube.com/watch?v=Uyk5sPql6Cg?feature=oembed&w=500&h=281]

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