Updated by Ian Buckley on September 19, 2017.
Learning electronics with an Arduino is fun, but using it to scare the lives of kids who do tricks or cures is just monstrous. Watch your back when they come to beg this year — and if they go through scary things all the way to your door, then at least you’ll know they really deserve candy.
Considering how long it can take us to complete a project, it’s probably best to start planning your Halloween fears right now. If you’re really comfortable, you might have plenty of time to do one or two of these before the onslaught kicks in.
1. Creepy giggling cauldron
Complexity : complex
Fear factor : 6.5 / 10
You enter the witch’s lair and slowly approach the glowing bubbling cauldron. As you approach, an evil screech from within rises with every step towards the feverish current as the murky mist on the dark surface consumes you forever.
Sounds like a big horror story, right? Well, this nightmare is real — and you can do it!
This impressive build takes an old boiler and equips it with Arduino, soundboards and speakers, as well as lights, distance sensor and fogger designed for use in pods or aquariums. On the code side, everything is already taken care of thanks to Barton Listik, who provides a sketch along with assembly details for this witchy project.
This project has a lot of parts and requires little assembly, so start this project sooner rather than later!
2. Talking skeleton
Complexity : complex
Fear factor : 7/10
Tired of hailing this gimmick or healers in person? This talking skeleton will take care of it for you, with many of your pre-recorded phrases. IR sensor detects motion and Adafruit’s Wave Shield stores files .wav, ready to be output to a pair of hidden computer speakers. A simple servo motor is used to move the articulated jaw, and some super-bright LEDs in the eye sockets complete the look.
3. Demon Mask Costume
Complexity : medium
Fear coefficient : 5/10
Does your face look too human? This is a problem — children are used to people, so any attempts to scare them will be somewhat softened when they see your familiar face. Use a demon mask to fix this.
Using the I2C communication protocol and small LED arrays for the mouth and eyes, the Adafruit Wave Shield and microphone give real-time voice-changing effects.