Posts with «uno» label

Duel Disk System blends physical cards with a virtual playfield

Yu-Gi-Oh! and other similar card games can be quite popular, but actually finding a group to play with can be challenging. Online games, on the other hand, have their advantages yet render your deck pretty much useless. As a way to combine these two worlds, Augusto Masetti has created a prototype Dual Disk System that will allow you to play with real cards in a virtual playfield.

To play, participants attach NFC stickers inside a card sleeve, which are scanned by an NFC reader controlled by an Arduino Uno. The card ID is then compared to the YGOProDeck API database via a computer, giving players a tactile element to this virtual competition.

Masetti’s project is still a work in progress, though we can’t wait to see the final version!

Arduino Blog 21 Feb 21:59

AAScan is an open source, Arduino-powered 3D scanner that uses your phone

3D scanners are amazing tools that literally let you turn everyday things into three-dimensional computer models. As seen on Reddit, if you want to make one yourself — using little more than a spare Android phone, Arduino, stepper motor, and 3D-printed parts — the AAScan setup by QLRO could be an excellent option.

The device spins an object on a 3D-printed turntable using an Uno and ULN2003 driver board, allowing it to take ~180 images automatically via a Python script running on the phone. These images are then combined in Meshroom to create a brand new 3D model. 

You can check out a demo of AAScan in the video below, rotating an apple to take pictures of each side.

This joystick-controlled machine draws light trails using a laser

Lasers are awesome. Glow-in-the-dark surfaces are, too. As seen here, Justin and Brett were able to combine the two into an excellent drawing machine. 

Their device uses a pair of gearmotors under Arduino control to actuate a rack-and-pinion gantry system over a canvas painted with phosphorescent powder. A laser is mounted at the end of this setup, which traces luminescent patterns on the surface as it moves. 

User interface is via a simple joystick arrangement, with a housing 3D-printed in PLA that’s reminiscent of a Nintendo Wii Nunchuk. 

Check out the demo in the video below and read more about the project in the duo’s write-up.

Carve shapes out of foam with this Arduino-controlled hot wire cutter

You may have a 3D printer or other “digital” tools like a laser engraver or CNC router, but what if you want to work with Styrofoam? As How To Mechatronics demonstrates in his latest project, many of the same techniques used there can be implemented to make your own Arduino-powered hot wire foam cutter.

This build is constructed with 20x20mm aluminum extrusion and 3D-printed parts, and uses an Uno board and CNC shield to drive three stepper motors. Two of these motors manipulate the wire in the horizontal and vertical directions, while the third controls a turntable that rotates the foam as needed.

As seen in the video below, it’s a brilliant design. Written instructions can be found in How To Mechatronics’ blog post, which walks you through the entire process from assembling the machine and connecting its components to preparing shapes and generate the G-code.  

This Arduino device turns on a workshop’s air filtration system whenever it hears a saw

Modern woodworking tools are amazing, allowing you to make any number of useful or decorative objects from the comfort of your garage. Unfortunately, they also produce a lot of dust, so YouTuber “Atomic Dairy” came up with the idea to install an air purifier that can cleanse the shop air eight times per hour. This only works if turned on, so he automated its operation with an Arduino Uno and a solid-state relay (SSR).

The AudioBot system uses a microphone to listen for loud noise, indicating that a saw is on and thus dust creation. When detected, the Arduino then signals the SSR to run for two hours to literally clear the air. 

There’s also a start button and RF control unit to trigger the fan for an hour or add an hour to the current run time, which is displayed on a small LCD screen. A stop button cuts off the filter immediately when needed.

Our Fanboy wood shop air filter is an overpowered air cleaner that we run whenever we are cutting or sanding wood projects in the shop, which is often. The AudioBot is an Arduino device that turns the Fanboy on whenever it hears us using a large tool like a table saw or miter saw. That’s right, it works by sound! This relieves us of the tedious task of plugging in the Fanboy when we work and remembering to unplug it a couple hours after we finish in the shop.

Could we just have bought a timer to use with the Fanboy? Yes. But it wouldn’t be sound activated and wouldn’t have all of the cool LEDs we have on the AudioBot. Plus the AudioBot only cost around $30 and it was REALLY fun to build. So in our shop the AudioBot is better than any commercial timer we could have gotten. 

Arduino Blog 03 Feb 16:26
arduino  featured  uno  

“The Arduino lie detector determined that was a lie”

Want to know if someone is telling you the truth? Well, unfortunately Juan Gg’s “USB Polygraph” isn’t a professional product and won’t actually give you an answer. However, it is a neat exploration into biometrics that incorporates Arduino, some sensors, and data visualization.

The DIY lie detector does measure one’s galvanic skin response, pulse, and breathing, so it’s an interesting way to observe “suspects” when questioned. Perhaps one could even use it to monitor a person’s vitals when performing various physical activities.

The device collects sensor readings via an Arduino Uno. These are then passed along to a nearby computer over serial, which graphs everything using a custom Python program. 

If you’d like to make your own, code and mechanical files are available on GitHub!

This is a USB Polygraph, which I designed and built as a classroom project on June 2018. The hardware side is pretty simple, an Arduino UNO collects data from some sensors and sends it via serial. On the computer, a Python program takes that data and not only graphs it, but it also allows the user to save it, manages questions and adds question and answer markers to the graphs so results can later be inspected. All results are saved in .txt files.

Arduino Blog 28 Jan 15:30

Automate your door latch with a simple app-controlled system

Adnan.R.Khan recently decided to give his room’s sliding door latch an upgrade by designing a mechanism to open and close it, using little more than an Arduino Uno and Bluetooth module. 

His automated device is operated via a smartphone app written in MIT App Inventor, and it employs a shield to control a small DC motor. The motor then pulls a cable wrapped around two pulleys in order to move the simple barrel latch in or out.

It’s an amazing display of what can be done with parts at hand and basic tools, and could certainly inspire other home security hacks. Be sure to check out the build process and the setup in action below! 

Arduino Blog 20 Jan 19:51

Aarnio adds force feedback and sensing to chairs

Desk chairs are essential tools for the office environment, so why not turn them into a computer input and feedback device? Aarnio, by researchers from several universities, adds this functionality via an Arduino board. It’s able to detect rotation and tilt via an MPU-6050 IMU, and how far it travels along the floor with an optical sensor from a computer mouse.

User feedback is provided by servo motors that can lock individual casters down. A brake setup is also implemented to inhibit rotation of the central axis and a spring is tightened as needed to modify tilt force. 

Testing showed about a 90% feedback recognition in users, and applications could include use as a gaming controller or as an assistive device for those with limited mobility of their hands.

You can read more about Aarnio in its research paper here.

Arduino Blog 09 Jan 22:54
arduino  uno  

Will Cogley’s tester controls 16 servos simultaneously

When you need to test a single servo, it’s a fairly straightforward task. Just hook it up to an Arduino to generate the proper PWM signal, along with an appropriate power supply, and you’re in business. If, however, you need to test a bunch of them at the same time, things get a bit more complicated.

To solve this challenge for another project he’s working on, Will Cogley built a 3D-printed tester capable of experimenting with 16 servos at the same time.

The device runs on an Uno, and uses four potentiometers and two buttons for controlling the motors in sets of four. Settings from all 16 outputs are displayed on a 1.8” TFT screen and an Adafruit 16-channel driver is implemented to interface with the servos directly.

Arduino Blog 05 Jan 19:43

This 3D-printed infinity cube is easy to make, hard to resist

Infinity cubes use six mirrors arranged in such a way that they bounce light inside back and forth, making them appear to stretch on to infinity. While not the first to make such a device, Thomas Jensma created the frame for his as a single 3D-printed piece.

This method meant that the plexiglass mirrors surrounding the build are automatically quite flat, allowing the 144 LEDs inside to reflect beautifully with no adjustment. An external Arduino board controls the lights, producing an infinite number of patterns. A 5V supply is also used in order to power the assembly. 

Instructions for the project can be found here, and with this simplified design, Jensma was able to construct his in a day for just $25 in parts.

Arduino Blog 31 Dec 21:03