This drink machine pours, slices, and dispenses mint!
Arduino Team — April 18th, 2019
Automated cocktail machines can be fun projects, but this device by CamdenS5 takes things to a whole new level. Not only can it pour liquids from multiple bottles, but it chops limes, dispenses sugar and mint, and even features a refrigerated compartment to keep ingredients at the appropriate temperature.
An Arduino Mega along with an Uno are employed for control, while user interface is provided by an Android tablet affixed to the front of the assembly.
There’s a lot going on mechanically inside, including a linear actuator for chopping, and augers that dole out mint/sugar as needed.
Details on the build are available here, with code/files ready for download, and an interactive Fusion 360 model that you can manipulate in your browser.
Keytars may have had their moment of popularity in the 1980s, but instruments of the day can’t hold a candle to “The Blade” by makers Sam Wray, Siddharth Vadgama, and Greig Stewart.
The musical device feeds signals from a pair of Guitar Hero necks, along with a stripped down keytar from Rock Band, into an Arduino Mega. This data is then sent to a Raspberry Pi running PD Extended, and is used to control a pair of Game Boys to produce distinct 8-bit sounds. Audio output can be further modified with a Leap Motion sensor embedded in one of the two necks.
What makes up The Blade?
– 3D-printed housing
We custom modeled and printed a housing for the instrument to ensure it would be ergonomic to wield, hold together with all the components, and also look badass.
– Two Guitar Hero necks
The necks, hacked off a couple of old Guitar Hero controllers, were totally rewired to output the button presses to jumper cables.
– Arduino Mega
All the wiring from the Guitar Hero necks fed into the Mega, which then registered the button presses and output appropriate MIDI signals over USB serial into the Raspberry Pi.
– Rock Band keytar
We stripped this down to the bare keyboard and had the MIDI also going into the Pi.
– Raspberry Pi
Taking in all the MIDI, and running PD Extended we got this to manage and re-map all the button presses we needed. This then output to a MIDI thru box.
– Arduino Boy
This fed the MIDI signals from the thru box into the Game Boy.
– Game Boy
These were heart. With MIDI fed in from a multitude of sources, the Game Boy, running mGB, was the synthesizing the signals into sound, output via a standard 3.5mm jack.
– Leap Motion The Leap Motion was used for further sound modulation.
When you see a vacuum cleaner, most people see a useful implement to keep their carpets clean. James Bruton, however, envisioned another use—as a musical instrument. His new project, which made its appearance this year on April Fools’ Day, sucks air through 12 recorders, allowing it to play a full octave and the melody and lead from “Africa” by Toto… or so he’d have you believe!
In reality, power for his instrument comes from a separate Henry Hoover in another room, blowing air through the normally-suction tube of the broken device on the screen. An Arduino Mega, along with a MIDI shield, enables it to open and close air lines to each of the 12 recorders as needed.
Check out how it was made in the first video below and the original fake in the second.
Listen to the best of the ‘holdies’ with this Arduino-enabled desk phone
Arduino Team — March 30th, 2019
If you’ve ever thought that your life needs a little more hold music in it, then this Greatest Holdies phone from FuzzyWobble could be just the thing.
The heavily modified device uses the shell of an old-style desk phone, but adds an Arduino Mega, a Music Maker Shield, and an ultrasonic rangefinder for “enhanced” abilities.
Now, when someone comes near the phone, it rings automatically, treating the person curious enough to pick it up to a selection of hold music. Users can choose the tune playing via the phone’s keypad, which is wired into the Arduino, along with the original headset switch that detects when the phone has been picked up.
Q-Bot is an Arduino Mega-driven Rubik’s Cube solver
Arduino Team — March 14th, 2019
Rubik’s Cubes seem to have been most popular in the 1980s, but never really went away. As such, if you have one lying around your house unsolved, why not ‘simply’ construct a machine to do this for you?
One possibility is the Q-Bot, outlined here. While it won’t break any world records, it’s a solid-looking assembly that appears to be relatively easy to build.
The Q-Bot features six NEMA 17 stepper motors, four of which turn one face at a time. When needed, the other two use timing belts to alternatively pull opposed stepper motor pairs back, allowing the other two to rotate the entire assembly. An Arduino Mega is utilized to control the steppers via a custom shield, with a computer running the Kociemba’s Algorithm.
Remote control cars are interesting, but as Leon van den Beukel shows in the video below, an RC forklift can be even more challenging and fun to create.
His project was constructed using a variety of hand and automated techniques, resulting in a build that can easily manipulate tiny pallets. Forks are lifted into the air via a motor and belt assembly, and tilted with a small servo.
The device uses an Arduino Mega for control, and is linked to an Android phone over Bluetooth for user interface. Code, along with STL files and drawings, are available on GitHub and the custom Android control app can be found here.
Do you enjoy mowing your lawn? No? Well now you can ‘simply’ print a robot to do it for you, based on German mechanical engineer Philip Read’s design. His Roomba-esque device uses a pair of gearmotors for movement, an array of three ultrasonic sensors for obstacle avoidance, and a perimeter wire/sensor to keep it within the designated boundary.
An Arduino Mega is employed as the main processing unit for the robotic mower, however a separate Nano onboard helps measure battery voltage as well as current when charging. Meanwhile, an Arduino Uno along with a motor driver are used to control the perimeter wire setup.
Extensive build info is available on the project’s write-up, and a short demo can be seen in the video below.
Fully autonomous robot lawn mower. The mower project includes the mower itself a boundary wire control station and an optional charging station. The mower navigates within the boundary wire which is positioned (pinned) around the perimeter of the garden. Once the mower senses the perimeter wire, it stops reverses and moves off in a new direction. The mower also has 3 sonar sensors to detect objects in the mowers path. Once the mowers battery is exhausted, the mower uses the boundary wire to navigate itself back to the charging station. All this can be customised in the Arduino software or completely re-written to your personal preferences.
Commercial mowers with this specification cost upwards of 600€ ($680).
Obviously, you’ll want to use such a device in an area devoid of kids or pets
As seen in our earlier post, James Bruton has been working on a breakfast-making robot, and has now moved from boiling eggs to making toast… or apparently hot dogs/sausages as shown in the video’s demo.
What he’s come up with uses a one degree-of-freedom gantry assembly to move servo-powered forks into position. These can then manipulate a cooking tray as needed to heat food up, flipping it out into a hand-held container when done. Two other servos take care of turning the device on and opening the door.
The control setup looks extremely similar to the previous build, with control via buttons, an Arduino Mega, and a small LCD display. Bruton notes that the Mega is used here because of its multiple serial ports, which will be useful to link everything together in the future.
Visualize tunes with James Bruton’s laser projector graphic EQ display
Arduino Team — February 7th, 2019
If you’d like to visualize your music, VU meters make an excellent tool. While they are generally built into audio equipment, maker James Bruton had the idea to construct his own using lasers. His setup features an MSGEQ7 module to separate sound frequencies, sending data on seven different ranges to an ArduinoMega board.
The Arduino then uses this information to selectively lower seven shutters via servos. When lowered, these shutters hide part of the lines formed by lasers and a spinning mirror assembly to indicate each sound frequency’s intensity.
The resulting machine not only effectively projects a visual of the music playing on a nearby wall, but also looks like some sort of mythical beast or contraption, progressively waving its appendages while emitting eerie green light!
Although this kind of project can be fun, be sure to wear the proper safety equipment when dealing with powerful lasers!
“Rare Candy” played on even more rare electronic instrument
Arduino Team — February 5th, 2019
According to musician/maker Ruben Dax, “Few things make him happier than being able to create things that create things.” As seen in the video below, what he’s created is a very strange cylindrical instrument with an array of buttons and what appears to be an auxiliary loop controller.
What he creates with it is music that starts off as simple “plink-plonk” sounds, but builds up into something of an orchestral arrangement.
The DIY device utilizes an Arduino Mega for control, with a bunch of pushbuttons and a dual-axis joystick for inputs. Button info is then sent to his computer over Bluetooth, which takes care of actual MIDI generation.
As cool as this is, a new gadget is in the works, which uses a Leonardo and other hardware for plug-and-play functionality. Whether this will interfere with the instrument’s unique rotating action remains to be seen!
Do you like grilled cheese? Would you rather not make it yourself? If so, then the Cheeseborg by Taylor Tabb, Mitchell Riek, and Evan Hill could be the perfect device for you!
This assembly line-like robot first stacks bread-cheese-bread using a vacuum gripper, and passes the unheated sandwich onto the grill via a pusher mechanism. Butter spray is first added to the bottom of the grill, then the top of the sandwich when present in order to coat both sides. Upon heating, the finished sandwich is pushed into a “food slot” for consumption.
Electronics are controlled using an Arduino Mega, while Google assistant running on a Raspberry Pi allows for voice activation. So the next time you’re hungry, all you have to do is ask, “Hey Google, make me a grilled cheese please!”
Our goal was to make an easy snack even easier. The design combines 7 individual subsystems enabling the assembly, cooking, and serving of a perfect, repeatable, tasty grilled cheese.
A big learning was how challenging it is to manipulate bread and cheese repeatedly. After several iterations, we converged on a vacuum lift mechanism, inspired by industrial robotic manipulation of small electronics. Due to the porosity of bread and the gloss of cheese, it was very challenging to find a mechanism working for both, but vacuum certainly seemed to do the trick!
For the actuation of of the electromechanical subsystems, we use stepper motors and servos combined with linkages, lead screws, linear bearings, a winch, and other mechanical components. For buttering (not pictures) we have a delightful spray butter can attached to an acrylic stand beside the grill.
Beyond the mechanisms, which are controlled by an Arduino Mega, the system is enabled with Google Assistant SDK running on an Raspberry Pi 3B, so the whole thing can be activated just by saying “Hey Google, make me a grilled cheese please!” From there, the machine stacks the bread, cheese, bread, then slides over the platform toward the grill as the buttering station sprays the bottom of the grill. Once the sandwich is placed on the grill, the butter sprays again (to coat the top of the sandwich). Then the grill closes, and cooks for the precise amount of the time for the perfect gooey grilled cheese! Then the grill opens and the sandwich is kicked to the serving slot for a hungry friend to enjoy.
Augment your tongue’s senses with the Cthulhu Shield
Arduino Team — January 31st, 2019
Whether one of your senses is weak or non-existent, or you would simply like a way to augment your perception and control options, the Cthulhu Shield can be applied in either situation.
The device takes the form of an Arduino Uno or Mega shield, with a strange flexible electrode setup that is placed directly on the user’s tongue.
When these electrodes are fired, they activate nerve fibers on the tongue, producing a feeling like that of carbonated bubbles popping. This can then be used to convey information to the user, whether this is visual, sound, or even Internet updates or other non-traditional stimuli. Importantly, it can also be utilized as an interface for tongue computer control.
The Cthulhu Shield lets anyone experiment and make devices that can expand your sensory experience!
We’ve made android apps and example programs that will let you use the Cthulhu Shield and your smartphone to ‘see’ and ‘hear’ with your tongue without needing to write a single line of code!
For those of you interested in making your own projects, we’ve written an easy to use Arduino library and provided example code to get you started on projects including tongue-heat-vision, tongue-based GPS directions, and soon, tongue-ultrasonic hearing. But don’t limit yourselves to the examples we’ve provided, the only limit to what you can make is your imagination!
Finally, we designed the Cthulhu to be used as a tongue based computer interface (because if you already have something in your mouth, why not use it to control your computer)? Write your own code to hotkey video game actions, send text messages, or control a wheelchair or mobility device with your tongue.
Seating charts at weddings and other formal events are usually handled by small cards at each table, but Gabrielle Martinfortier had other plans.
For her big event, she along with help from her now-husband and friends constructed a seating arrangement on a 3’ x 4’ wood canvas, equipped with a 7” TFT display and an RFID reader. An Arduino Mega serves as the brains of the device, taking advantage of its expanded IO capabilities to control an LED assembly over each table on the chart.
Wedding guests simply had to present the card they received with the invitation, then their proper table was lit. As seen in the video below, this eliminated seating confusion, and provided a bit of extra entertainment for those involved.
I wanted to make something special for my wedding tables chart, and I thought this was a good way of making it personal, as it reflects my love (addiction) for electronic projects.
So the plan was to make a big wood panel with the plan of the room on it, including, of course, the tables and their names (they are plant names, in French). The guests received a card with an RFID sticker on it along with their invitation. On the back of the card was written (in French) something like “This card is of great importance, keep it safe and carry it on you at the wedding.” I didn’t want them to know what it was for until the wedding.
The chart has several elements a TFT display, an RFID reader, a green LED and a red LED, a push button and one strip of 3 LEDs for each table. When the RFID tags are scanned, the green LED turns on if it is recognized, and a personalized message is displayed on the screen, including the name of the table where the guest is seated. In addition, the LED strip associated with the table is turned on, shedding light on the table on the room’s plan. If the card is misread or unrecognized, the red LED is turned on with an “access denied” message on the screen. The button is for those who did not succeed in not losing or forgetting the card. It displays a message on the screen, asking them to go to the bar and say something like “I am not reliable,” in exchange of which they get a backup chart to find their seat.
I changed a few things along the way: I wanted to paint the wood panel but changed my mind because I was scared I’d make a mess and have to start over with a new panel. Since I have a circuit machine I decided to make the writings and drawings with vinyl.
I also had a 20×04 character LCD screen in the beginning, but I upgraded to a 7″ TFT screen because it’s bigger and not as limiting in terms of message length.
This robot is eggsactly what you need to cook breakfast
Arduino Team — January 17th, 2019
Normally, boiling an egg involves heating water in a saucepan, then dropping an egg inside to be properly heated. James Bruton, however, now has a bit of help in the form of his breakfast-making robot.
The device uses two servos, along with a motor/encoder/screw assembly to rotate and lower the egg into place. It then takes it out after six minutes, and tips it out into a secondary container.
As of now, temperature is manually controlled, but it’s tracked with a DS18B20 temperature sensor to initiate the egg lowering procedure. An Arduino Uno takes care of the lifting screw assembly, while an Arduino Mega handles everything else.
Hunt the Wumpus is a text-based survival/horror game developed in 1973. As such, it’s perhaps due for an update, and Benjamin C. Faure was able to do so using an Arduino Mega to run a graphical version on an 8×8 MAX7219 LED display.
The game consists of moving your character through the 64-LED randomly generated world, avoiding pits and bats, attempting to face the Wumpus to fire your one arrow. Navigation is aided by “wind” and “stench” lights, indicating either a pit or the foul Wumpus is nearby. The game is also enhanced with a few LED animations and a small piezo speaker.
On startup, the game will generate an 8×8 map for the player that contains bats, pits, and a Wumpus. The player must pay attention to their senses to ensure they don’t fall into a pit or run into a Wumpus. Running into a bat might not be instant death, but they can carry you over a pit or even straight to the Wumpus.
If the player wishes to win, they must pinpoint the location of the Wumpus. Then, they must take one step towards the Wumpus (so that they are facing the proper direction) and fire their only arrow. If they hit the Wumpus, they win! If they miscalculated, however, they will meet a grisly fate.
A demo can be seen below, while code for the project is available on GitHub.
High school play gets a simulated sports scoreboard
Arduino Team — January 2nd, 2019
Maker “DJ’s Fantasi” is the technical director at his local high school’s theater arts program, and when the director of their winter production of Disney’s High School Musical requested a scoreboard prop, he excitedly set to work.
The resulting build consists of four 7-segment displays, lit up by strips of non-programmable LEDs.
Numbers on the device are shown with the help of an Arduino Mega, which takes input via a single-channel remote. Seven I/O pins are used to indicate each segment to be displayed, and another four multiplex the signal into the required four digits.
While a more general input device could be used, this particular scoreboard was especially set up for this musical, sequencing through numbers that correspond to the performance on command.
If you’d like an easy way to accomplish repetitive biological experiments, the OpenLH presents a great option for automating these tasks.
The heart of the system is the Arduino Mega-controlled uArm Swift Pro robot, which is equipped with a custom end effector and syringe pump. This enables it to dispense liquids with an average error of just .15 microliters.
A Python/Blockly interface allows the OpenLH to be set up for creative exploration, and because of the arm’s versatility, it could later be modified for 3D printing, laser cutting, or any number of other robotic duties.
Liquid handling robots are robots that can move liquids with high accuracy allowing to conduct high throughput experiments such as large scale screenings, bioprinting and execution of different protocols in molecular microbiology without a human hand, most liquid handling platforms are limited to standard protocols.
The OpenLH is based on an open source robotic arm (uArm Swift Pro) and allows creative exploration. With the decrease in cost of accurate robotic arms we wanted to create a liquid handling robot that will be easy to assemble, made by available components, will be as accurate as gold standard and will cost less than $1,000. In addition the OpenLH is extendable, meaning more features can be added such as a camera for image analysis and real time decision making or setting the arm on a linear actuator for a wider range. In order to control the arm we made a simple Blockly interface and a picture to print interface block for bioprinting images.
We wanted to build a tool that would be used by students, bioartists, biohackers and community biology labs around the world.
The OpenLH can be seen in the video below, bioprinting with pigment-expressing E. coli bacteria.
Arduino Mega is the brains of this ant-like hexapod
Arduino Team — December 13th, 2018
Six-legged robots are nothing new, but if you’d like inspiration for your own, it would be hard to beat this 22 servo-driven, 3D-printed hexapod from Dejan at How To Mechatronics.
The ant-inspired device features three metal geared servos per leg, as well as a pair to move the heat, another for the tail, and a micro servo to activate the mandibles.
To control this large number of servos, Dejan turned to the Arduino Mega, along with a custom Android app and Bluetooth link for the user interface. While most movements are activated by the user, it does have a single ultrasonic sensor buried in its head as “eyes.” This allows it to lean backwards when approached by an unknown object or hand, then strike with its mandibles if the aggressor continues its advance.
As the name suggests, the hexapod has six legs but in addition to that, it also has a tail or abdomen, a head, antennas, mandibles and even functional eyes. All of this, makes the hexapod look like an ant, so therefore we can also call it an Arduino Ant Robot.
For controlling the robot I made a custom-built Android application. The app has four buttons through which we can command the robot to move forward or backwards, as well as turn left or right. Along with these main functions, the robot can also move its head and tail, as well as it can bite, grab and drop things and even attack.
You can see it in action and being assembled in the video below, and build files are available here.
Teenager automates his family’s holiday lights with an Arduino Mega
Arduino Team — December 5th, 2018
As first reported by the Des Moines Register, this year 14-year-old Josiah Davenport decided to animate 3,500 Christmas lights on his family’s home with the help of an Arduino Mega. The lighting pattern is synchronized with the Trans-Siberian Orchestra’s “Wizards in Winter,” which passersby can listen to by tuning in to 89.5 FM on their car radios.
This ambitious installation was started back in July, and took around 100 hours of research, programming, and assembly. How the lights look at night can be seen in the first video below, while the second and third outline how everything was assembled.
Davenport notes that it’s been a fun endeavor, but is happy to see it come together, hoping that it brings a smile to people’s faces this holiday season! You can read more about the project in his local newspaper’s article here.
Bit clicks away to illustrate complex interrelationships
Arduino Team — November 29th, 2018
Aseen here, Bit by Jonghong Park at the University of the Arts Bremen is a beautiful visualization of how everything is linked together using the Markov chain principle. This installation uses an Arduino Mega for control, rotating arms that hold a pair of microswitches around coaxial gear-shaped cylinders.
In the sequence, one arm turns, then lobes on these “gears” that represent a two-bit number push the microswiches. This number is used to choose the following stepper to be turned in the sequence. The next selected arm then rotates in the same manner. This predictable cycle continues on and on clicking in a way that’s related, but not without careful observation.
The installation ‘bit’ represents a natural random process based on the principle of a Markov chain. Each machine consists of “information” engraved on the read head and an “event” caused by the operation of the motor. Machines are linked together based on a Markov chain algorithm to influence events, and eventually we can predict which of the four machines will move in the next turn. The movements of these four machines are shown as a random process, but in fact they are sequence of events. Like an invisible chain, all things and events in our world are connected.
Each of the four machines has its own state, which have been named ( 0,0 / 0,1 / 1,0 / 1,1 ), respectively. Each machine is equipped with a wooden read head with binary information on the surface and a microswitch to read the current state of the read head. The microswitch is connected to the stepper motors located in the center of the machine. A machine whose state is called moves the stepper motors by 1/240 of a degree. The microswitch turns on / off (1/0) along the surface of the read head each time the motor moves and calls the next machine corresponding to the state (2-Bit) of the current position of the read head. At this time, the machine corresponding to the measured state goes through the same process and calls another machine or itself.
These four machines symbolize another system separate from ours. We observe machines separate from the world as if we were watching computer simulations. The binary digits recorded in the read head are the smallest units of unspecified information possible, called bits. The bit, as the smallest particle that can make up the world and not simply as a digital recording unit, symbolizes the basis of this world. The things that we call noise, the information that we think of as meaningless, the information from which we cannot find the pattern, and the information that we cannot decode are called “chance”. When this information can be observed from outside our own world, we have proven through the Markov chain that all events are linked together.
The interplay concept is certainly interesting, and it’s pleasing to watch in the video below from a purely aesthetics point of view as well.
Earlier this year, artist Niklas Roy was invited to participate in the Drehmoment art festival that takes place in the south-west of Germany. The “catch” to this festival is that each artist was invited to team up with a local company to take advantage of their products and resources. Of these was cleaning equipment brand Kärcher, known for their pressure washers.
With this company’s backing, Roy put together a musical water fountain powered by eight pressure washers, dubbing it the “Wasserorgel von Winnenden,” or “Water Organ of Winnenden”—the location of Kärcher’s headquarters.
The installation is controlled by an Arduino Mega, along with supporting electronics including a Music Maker Shield and solid state relays to activate the pressure washers. During the festival, passerby were invited play some tunes using a 3D-printed keyboard made to withstand the elements and less-than-gentle interactions.
The brain of the Wasserorgel was an Arduino MEGA 2560, stacked with an Adafruit Music Maker Shield. The MIDI synthesizer of the shield generated the instrument sounds based on the input coming from a self-built, 3D-printed keyboard. The keyboard was designed solid enough to withstand weather and the misguided enthusiasm of drunk people at 3 ‘o clock at night. The program on the Arduino translated the keystrokes into water and light effects by switching 12V RGB LEDs via darlington transistors and the eight pressure sprayers via solid state relays. Five of the pressure sprayer fountains were installed on top of the main basin, one was installed on top of an existing fountain and two were installed on the roof of the Kronenplatz-building.
Custom weather station enhances and modifies electronic music
Arduino Team — October 25th, 2018
While the environment is important for any musical performance, generally it’s not an active part of the show. Adrien Kaeser, though, has come up with a device called the “Weather Thingy“that integrates climate-related events directly into electronic music performances. It’s able to sense wind direction and speed, light intensity, and rain, translating this data into MIDI inputs.
The system, which was created at ECAL, consists of two parts: a compact weather station on top of a portable stand, as well as a small console with buttons and knobs to select and modify environmental effects on the music.
Hardware for the project includes an Arduino Mega and Leonardo, a TFT screen to display the element under control and its characteristics, an ESP32 module, a SparkFun ESP32 Thing Environment Sensor Shield, a SparkFun MIDI Shield, high speed optocouplers, rotary encoder knobs, and some buttons.
Be sure to see the demo in the video below, preferably with the sound on!
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