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104 GUIDES | 627 PAGES | 15 FEATURED | 4 POPULAR
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Mystery Box: Crypto Countdown Case
This Cold War-era mystery box's disarm code must be toggled in before the timer reaches zero!
by John Park
Here's a Soviet themed launch-code box, complete with missile switch covered toggles, a Feather with red 14-segment display for the countdown timer, and stress-inducing piezo buzzer. Use it for an escape room, prop, or wedding proposal. Your players, or potential spouse-to-be, will need to enter the correct five-switch sequence to defuse the device before all is lost. (Note: this project is a harmless prop, not an actual bomb.)
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Mystery Box: The Freefall Deck
When this deck of cards is tossed in the air, it reveals a secret audible Morse code message.
by John Park
Perfect for magic tricks, escape rooms, and slightly unorthodox birthday parties -- this seemingly innocuous, sealed deck of cards contains a secret. When the puzzle is solved, the deck is thrown in the air, tossed to a friend, or dropped a short distance. Freefall is detected by the Circuit Playground embedded within, and it beeps a secret Morse code message.
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Rx Snapchat Spectacles for DIY and STEM
Combining artful aesthetics and decent videography, Snapchat Spectacles are a handsfree wunderkind
by Timothy Reese
Sometimes I need to film something, and normal cameras get in the way. I use mini-tripods, Gorillapods, and even my own flexible arm tripod to position my cameras for shots, but wearing the camera would be far more convenient. Enter my prescription Snapchat Spectacles. Hashtag.
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Mystery Box: The Nautical Crate
Build your own locking mystery box which can only be opened with a magnet in just the right place!
by John Park
This simple-yet-effective method of building a mystery box uses only a solenoid, a reed switch, and batteries to create a locked box that can be opened using a carefully positioned magnetic key.
Overwatch Prop Gun: Lucio's Blaster Pt. 2
Part 2: Lights, music, and sound effects prop circuit integration
by John Park
Build your own Overwatch Lucio Blaster! Use Arduino, NeoPixels, MP3 Music Maker, Audio FX board, and a 20 watt amplifier to drive the impressive blasting sound effects, lights, and music from this Overwatch prop gun! In part two, combine the electronics into an integrated system.
Overwatch Prop Gun: Lucio's Blaster Pt. 1
Lights, music, and sound effects prop circuit design
by John Park
Build your own Overwatch Lucio Blaster! Use Arduino, NeoPixels, MP3 Music Maker, Audio FX board, and a 20 watt amplifier to drive the impressive blasting sound effects, lights, and music from this Overwatch prop gun! In part one, design and build the individual components.
Mad Science Test Tube Rack
Create a mad science blacklight test tube rack with fluorescent pigments and ultraviolet LEDs.
by John Park
Build a creepy, glowing test tube display... if you dare. A Feather microcontroller makes the UV LEDs shine to create dazzling effects in the fluorescent pigment-and-water filled test tubes. Easy-to-assemble black iron pipe forms the base of this labware set. The perfect prop for your own haunted house or creepy laboratory.
Circuit Playground PZ-1: Pizza Box DJ Controller
Make a DJ controller from conductive paint, cardboard, and a Circuit Playground!
by John Park
Make your own PZ-1 MIDI pizza box DJ controller using a Circuit Playground, which speaks MIDI directly to your software, such as Traktor, Mixxx, and others. With a stencil and conductive paint you'll create a delicious controller layout.
World's Smallest MAME Arcade Cabinet
Tempest in a Teacup
by Phillip Burgess
Lessons learned while making absurdly small things.
Circuit Playground Class Scheduler
Keep track of tricky schedules, Monday through Friday!
by John Park
The Circuit Playground's NeoPixels are used as indicators for day of the week and class periods, color coded per subject. You can enter a complex schedule that varies daily in the sketch, and then click the buttons on your Circuit Playground to find out which class is next.
Introduction to iOS Development
Wouldn’t it be cool to create your own iPhone app? Look no further! This tutorial will show you how to get started on your app development adventure with Xcode!
by Trevor Beaton
This tutorial will show you the process of acquiring Xcode and how to setup your Apple Developer Account
Windows IoT Core Application Management
Set an IoT application to run at startup
by Rick Lesniak
We explain how to configure your Windows IoT Core system to launch a headed or headless application at startup
Windows IoT Core Application Development: Headed Blinky
Learn how to create an Windows IoT Core Headed Application
by Rick Lesniak
We step through the Microsoft Headed Blinky example. Make an LED blink in Windows IoT!
Windows IoT Core Application Development: Headless Blinky
Learn how to create an Windows IoT Core Headless Application
by Rick Lesniak
We step through the Microsoft Headless Blinky example. Make an LED blink in Windows IoT!
Happy Chewbacca Mask
Chewbacca is a lovable Wookie with a distinctive voice, but here's how to give him a voice transplant and add your own fun sounds to this talking mask
by John Park
Trade Chewbacca's famous grunts and growls in this talking electronic toy mask for some sounds of your own choosing. Using the Audio FX Board, it's easy to modify the lovable Wookie to sound like Pee Wee Herman, a joyful vlogger, or any other sound you like.
Fair Weather Friend: Internet-Connected Migraine or Allergies Detector
"Web scraping" provides an alternative to restrictive programming APIs
by Phillip Burgess
Using forecasts by AccuWeather.com, this wireless ambient display predicts health issues like allergies or arthritis, or good days ahead for leisure activities like golf or sailing.
Sandblaster - 3D printed sand buggy
3D printed sand buggy!
by Rick Winscot
Sandblaster is a variation on Blue Buggy remixing the original Cox International gas-powered sand buggy - scaled-down, converted to electric, and 3D printable! You can use it to explore obstacle avoidance, autonomous navigation, driverless vehicle design, or assisted Remote Control. Or… build in the morning and race in the afternoon!
Press Your Button for Raspberry Pi
Press Your Button is a game of chance for all ages.
by Roberto Marquez
Press Your Button is a single or multi-player game written for Raspberry Pi. It uses a button, attached to a GPIO pin, to tell the computer when to stop the score board. Players take turns until one reaches the target score.
Android Smart Home Mirror
Turn an old tablet into an entryway display
by Becky Stern
Flex your Android muscles by trying out Hannah Mitt's Home Mirror software, perfect for bringing new life to an outdated tablet.
Phone-Activated Talking Dog Collar
"I can smell you!"
by Phillip Burgess
Use the Adafruit Bluefruit LE Micro and Audio FX boards to wirelessly trigger sound samples on your dog's collar with your phone! Inspired by Dug's talking collar from the movie Up.
3D Printed Qi Wireless Charging Stand
Charge devices while they lounge.
by Ruiz Brothers
Create a simple wireless charging stand for mobile devices with our Qi charger/transmitter, and Qi receiver modules
Simple Arduino-based USB VID & PID tester
Verify your VIDs, Pan out your PIDs
by lady ada
This little project does one thing and one thing well - checks the VID and PID of a USB device. This is really handy for QC checks on incoming goods as well as verifying that dev board with a USB bootloader is properly programmed and enumerating!
DIY Rechargeable LED Makeup Compact
Shed some light on your face!
by Becky Stern
Add warm white LED sequins and a lipoly battery circuit to your makeup compact so you can see what you're reapplying. This project is also a perfect portable selfie light!
Talking d20 20-Sided Gaming Die
“Greetings, adventurer!”
by Phillip Burgess
The 20-sided die — or “d20” as it’s known to tabletop gamers — is an icon of geek culture. We’ll 3D-print a jumbo d20 and outfit it with electronics to announce your rolls (and a few surprises).
3D Printed Flexible LED Glove with Conductive Filament
Make a flexy glowing wearable with integrated circuits!
by Ruiz Brothers
In this project we’ll show you how to use glow in the dark ninjaflex and conductive filament to create an LED wearable! No soldering or wires involved here, the circuit is fully 3D printed