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Archive for the ‘arduino nano’ Category

If you suppose that electromagnetically-propelled projectiles are strictly the purview of well-funded government research labs, think again! Using two sets of coils wrapped around custom 3D-printed base structures and an Arduino Nano for control, YouTuber “Gyro” created his own coilgun capable of propelling steel fast enough to dent a piece of wood.

When fired, a photodiode at the end of each electromagnet coil sends a signal to the Arduino. This, in turn, shuts off the coil, allowing it freely escape the barrel.

As noted in his Instructables write-up, the gun is constructed without large capacitors, which can be expensive and dangerous. Instead, two LiPo battery packs are combined to produce around 22 volts, though this and the number of coils used, could be increased to produce a more powerful device!

You may be familiar with “Pop-A-Shot” at arcades and amusement parks, which allows you to shoot baskets at a hoop for fun and prizes. Maker Cory Guynn, apparently unsatisfied with not having one of these at home, decided to duplicate the game with the “Pop o Shop.”

In this version, an ultrasonic sensor in the hoop tells an Arduino Nano when a shot has been registered, while two 7-segment displays inside of a LEGO scoreboard show the current count, time remaining, and high score. There is also an RGB LED that turns green after every made basket and changes color with a new top score.

Incidentally, one of the displays can also spell out “POPOSHOP,” which dictated the name of the game, since there is no “T” character in the LedControl library used! For more info and code, be sure to check out the “Internet of LEGO” build log!

Usually, when you think of doing “surgery” on electronics, it’s to replace a component, or maybe modifying an appliance into something different. In this case, an Arduino Nano powers Hurry, Doctor!, an updated version of the board game classic Operation meant as a middle school STEM exercise.

This game, of which creator “TrevorB23” gives an extensive explanation in his Instructables write-up, features a LEGO minifigure with cutouts inside that house obstructions such as a “mental block” and “funny bone.” As with the original, the objective is to remove these foreign bodies without touching the sides, constructed here with conductive aluminum foil tape in order to signal the Nano.

With its enhanced electronics, TrevorB23’s version adds a timing element to encourage “surgeons” to complete tasks faster, as well as doctor names and melodies that can be altered if so desired. Want to make your own game? You can follow along with his 31-step tutorial.

As entertaining as watching Netflix may be, you’re not burning a lot of calories while binging on your favorite shows. In order to do both at the same time, hacker “Roboro” modded a stationary exercise bike to stop streaming if he’s not maintaining his fitness goals.

Bicycle speed is derived from the signal that’s normally sent to the built-in display. He uses an Arduino Nano to hijack the square wave, and sends this info to the streaming computer serially via USB.

Starting the Python script and inputting some information, Firefox will start to stream Netflix and display in real-time for current workout information such as round, speed, nominal speed for this round and time to next round. If the user goes below the nominal speed for too long, Netflix will pause until the user has gotten back up to speed.

If you’d like to try this yourself, you can find an Instructables write-up with all the necessary details and check out his code on GitHub. Though designed around Netflix, Roboro notes that it can be used with other streaming services with a few changes.

After building a bicycle that could travel across town while making music, Sam Battle now taken things in a different direction. Synth Bike 3.0, which will be on display at the Science Center Dublin until September, is set up on a training fixture so that you can pedal it indoors rain or shine. This version also features a simplified control panel on the handlebars, allowing it to be played by anyone at a tempo controlled by the rear wheel’s speed.

Battle’s YouTube channel is named “LOOK MUM NO COMPUTER” however, this apparently doesn’t count microcontrollers. Hidden in the externally clean-looking handlebar groove box is a total of 12 Arduino Nano boards, along with a maze of wiring, strip circuit boards, frequency central PCBs, a SparkFun WAV trigger, and some other electronics. There’s even built-in speakers on the sides to output the created sounds.

Be sure to check out Synth Bike 3.0’s New Atlas write-up for more info on the project.

Computer vision has traditionally relied on an assortment of rather involved components. On the other hand, everything you need to do this complicated task is readily available on an Android phone. The clever setup seen in the video here uses a smartphone to capture and process images, then send out a signal over Bluetooth to tell which way the device needs to be adjusted in order to focus on a nearby face.

An HC-05 Bluetooth module receives this signal and passes it to two servo motors via an Arduino Nano, moving the phone left/right and up/down.

You can find the Arduino code for this project on CircuitDigest, and the Android Processing code can be downloaded there as a compressed folder.

Though time may be relative, unless you’re planning on doing a lot of space travel, slowing things down in real life is “notoriously” difficult. On the other hand, with carefully-coordinated vibrations and lighting, the “sLOMO” device is able to make objects such as a feather or plant appear to move in slow motion with the naked eye.

Inspired by Jeff Lieberman’s Slow Dance Frame, this project is made out of a readily available IKEA Ribba frame, and the object inside vibrates using an electromagnet. An Arduino Nano controls this magnet and pulses a double-row LED strip, in order to make the item appear to slow down, or even distort itself into multiple overlapping images.

Want to build your own? Check out the excellent write-up on Instructables, and see the magical frame in action below!

The La Fabrique DIY team has been working on a unique clock modeled after buildings seen along the Seine River in Paris. The “City Clock” is different from the others in that instead of a dial or decimal numbers, windows light up in a binary format, displaying the time in a binary sequence.

Electronics-wise, the clock can be made with an Arduino Uno, involving a fairly simple circuit with individual LEDs and resistors, as seen on this Imgur set. Also shown there is the Kickstarter version of the circuit, which amounts to a sort of gigantic shield that an Arduino Nano is plugged into.

With the City Clock, you calculate the time by adding every digit vertically. The first floor equals one, second equals two, third equals four, and the top equals eight. Using this system, it’s possible to create every digit from zero to nine by adding one number to another.

These clocks are available in various kit forms, including just the electronics or frame if you’d like a head start crafting something truly your own!

While touchscreens are nice, wouldn’t it be even better if you could simply wave your hand to your computer to get it to do what you want? That’s the idea behind this Iron Man-inspired gesture control device by B. Aswinth Raj.

The DIY system uses an Arduino Nano mounted to a disposable glove, along with hall effect sensors, a magnet attached to the thumb, and a Bluetooth module. This smart glove uses the finger-mounted sensors as left and right mouse buttons, and has a blue circle in the middle of the palm that the computer can track via a webcam and a Processing sketch to generate a cursor position.

You can see it demonstrated in the video below, drawing a stick man literally by hand, and also controlling an LED on the Nano. Check out this write-up for code and more info on the build!

As YouTuber Evan Kale puts it, his set is was kind of boring. He decided to spruce things up by turning his ordinary door into an “alien portal,” lining it with a strip of RGB LEDs. Though this may not be the first time you’ve seen this type of lighting in action, he directs our attention to a few interesting details about using them in typical Kale style.

One interesting note comes around the 4:50 mark, where he points out his portal is controlled using Hue Saturation Lightness (HSL) via a potentiometer instead of RGB. This keeps the glowing effect consistent, while allowing color adjustment.

For this project, he employed an Arduino Nano, which looks like a great choice since it needs a limited amount of I/O. Using this tiny board, the entire control package can fit into his small 3D-printed enclosure.

You can see a demo of Kale’s “alien portal” below, and check out his channel for more fun Arduino projects!

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