Archive for the ‘Arduino’ Category

Spinphony turns cycling into music

Friday, July 22nd, 2016

Spinphony is a bike installation that was built in collaboration with 72andSunny‘s Google team and their Made with Code initiative, with hopes of inspiring teenage girls to take an interest in coding.

As its name would suggest, the project combines spinning (indoor cycling) and music with each bike representing a different instrument stem of a song.

For instance, bike one controls drums, bike two might control bass and so on. The way we made it all come together was to have the volume of each stem depend on the speed at which the bike was being pedaled (i.e. the slower the RPM the quieter the stem of the song and vice versa). This is where Arduino came into play.

The prototype is based on an Arduino Uno and uses two magnets, a reed switch, RPM values, and MIDI to produce some spincredible sounds. You can see it in action below!


This DIY stepper motor clock is weird yet wonderful

Friday, July 22nd, 2016

Just when you thought you’ve seen every possible kind of Arduino-driven clock, another one emerges. This “DIY strange-looking” device takes the form of a wheel with times written on it, which is rotated using an Arduino Micro and a 5V stepper motor. And while it may not be the most accurate timekeeper out there, it’s an excellent way for Makers to explore electronics, programming, and even geometry.

Unlike most clocks that have either two or three hands going around a 12-hour face, 17-year-old Instructables user “Electronics for Everyone” chose a fixed pointer to denote the time in 10-minute intervals instead.

The idea behind the clock is a circle with a circumfrence of 72cm that ticks at 1cm every 10 minutes, which means every 72 ticks will equal 12 hours…

You can find an entire breakdown of the build, along with its measurements and code, on its project page here.

Prototyping a smart bulb with JavaScript, Arduino + PubNub

Thursday, July 21st, 2016

In this video, our friends at PubNub are going to create a smart home network that builds upon their previous Johnny Five tutorial. They again hack an Arduino Uno using JavaScript, but this time to create the simplest smart bulb. Because by “smart bulb,” we really just mean an LED.

The tutorial was developed by Tomomi Imura from PubNub and also uses Johnny-Five. No, not the robot from the movie Short Circuit. It is an open-source JavaScript robotics framework that lets you program an Arduino with Node.js. The bulb itself is remotely controlled via a web portal. (more…)

This Arduino machine will sort your Skittles by color

Wednesday, July 20th, 2016

Do you just really hate yellow Skittles? Only love the red ones? Well, why waste your time sorting them out yourself when an automated machine can do it for you? As part of a recent tutorial, Dejan Nedelkovski has built what we calls the “Arduino Color Sorter” using a TCS3200 color sensor, two hobbyist servo motors, and an Arduino Nano. (more…)

Turn your old cellphone into a smartwatch

Wednesday, July 20th, 2016

Do you have an old cellphone lying around somewhere? Don’t know what to do with it? Time to blow off that dust and convert the ‘dumb’ device into a smartwatch! This is exactly what Tinkernut has done. The DIY wearable not only tells time, but connects wirelessly to a smartphone over Bluetooth and notifies its user of incoming calls and messages via light and vibration.

The build itself uses an LCD screen and vibrating motor from a Nokia 1100 along with an Arduino Pro Mini to drive the system. A 3.7V 1100mAh rechargeable battery powers the gadget. All the electronics are soldered together to a perfboard, and housed inside a 3D-printed case. (more…)

Getting Started with Johnny-Five for IoT

Tuesday, July 19th, 2016

Interested in the world of hardware hacking, but feeling left out because you just don’t have the time to learn another language? Or maybe you aren’t comfortable using Sketch to program? Have no fear, you can easily use JavaScript to program boards like Arduino and Genuino. Yes, just JavaScript!

In this series of video, PubNub’s Tomomi Imura shows you how to start hacking an Arduino with Node.js using Johnny-Five, a JavaScript Robotics Framework.

Part one of this tutorial covers:

  1. Setting up a board.
  2. Building the Hello World of hardware, a LED blink.
  3. Writing your Johnny-Five code to make it blink programmatically.

Enjoy the tutorial!


Build your own coin-operated Wi-Fi hotspot ticketing system

Monday, July 18th, 2016

Reddit user “jeff122885” has come up with a fairly simple yet clever coin-operated ticketing system for his Wi-Fi network. The setup consists of a Ch-926 multi-coin acceptor, a MikroTik Groove, and an Arduino Uno with a microSD card module. The unique password for the hotspot is stored in the SD card and read by the Arduino.

Once the coins are deposited, the voucher code, Wi-Fi name, duration, cost, and instructions on how to connect are printed onto a receipt. You can see it all in action below!

Lawn Da Vinci is an open-source, remote-controlled lawn mower

Monday, July 18th, 2016

Inspired by the one seen in Honey, I Shrunk the Kids, Blake Hodgson has built a remote-controlled lawn mower of his own dubbed ”Lawn Da Vinci.”

The robotic machine’s frame is made from angle iron and steel, while its wheels and motors were taken from a mobility scooter. Power is supplied by a pair of 12V car batteries wired in series, and it’s driven across the yard with an RC airplane remote. (more…)

OMG, this DIY split flap display is awesome

Friday, July 15th, 2016

Let’s face it, there’s something magical about split flap displays. Common throughout older airports and train stations, the electromechanical devices are used to show changeable alphanumeric text (e.g. arrival and departures), fixed graphics, or in Jonathan Odom’s case, Internet slang.

With three-letter abbreviations like BRB, LOL, OMG and SMH commonplace in today’s smartphone and online conversations, the Maker decided to bring text and animation back to its mechanical roots with his own split flap display. As you can see in the video below, an arcade button under each frame enables him to cycle through all 26 letters to spell out his thoughts in acronym form, while a fourth frame reveals an animation of the very first cat video (by Eadweard Muybridge). (more…)

Throwback: Maker uses Arduino to get revenge on his noisy neighbors

Thursday, July 14th, 2016

For our throwback project of the week, we stumbled upon a YouTube video that dates all the way back to 2012. And while the viral clip itself (which has over 1.4M views) may be a few years old, the problem it solves is timeless.

Unfortunately, you don’t get to choose your neighbors; however, what can choose is how you put up with them. After growing tired of the folks next door failing to turn down their stereo, Maker “Jamil” came up with an ingenious way to put an end to the noisy behavior: fight the loud music with, well, even louder music. (more…)