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A practical guide to transistors and their use
Transistors 101
16
Beginner
Create bitmapped light paintings with HalloWing or Circuit Playground Express!
HalloWing Light Paintstick
18
Beginner
Answer any question with a shake of the Magic 9 Ball!
HalloWing Magic 9 Ball
6
Beginner
Create your own motion reactive laser swords with the HalloWing and NeoPixel strip.
HalloWing Lightsabers
16
Beginner
Test your paper airplane designs with this DIY cardboard launcher
Paper Airplane Launcher
9
Beginner
Find your friends with LoRa, GPS, and a compass module.
Glitter Positioning System
9
Intermediate
Blast those pixels!
Adafruit RGB Matrix FeatherWing
8
Beginner
Use a Crickit and Circuit Playground Express to heat or cool items.
Make It Hot or Cold
5
Beginner
'Ear we go again
Circuit Playground Express Head-Tilt Ears
15
Beginner
An odd little robot built around CRICKIT that's vaguely reminiscent of a cricket.
CRICKIT Flippy Robot
6
Intermediate
Protect against intruders by building a security system for a cardboard smart home using Adafruit IO.
Adafruit IO Home: Security
32
Beginner
Installation and configuration of reef-pi, the open source reef tank controller, capable of automating AC equipment, DC pumps, LED lights and more
reef-pi Guide 1: Setup and Demonstration
15
Intermediate
The not-so-mystifying oracle
Hallowing Spirit Board
13
Beginner
Train your cat to press a button and receive a reward
Automatic Cat Treat Dispenser
37
Beginner
Learn to control AC equipment using reef-pi
reef-pi Guide 2: Power Controller
8
Intermediate
Simulating daylight cycle in aquariums using reef-pi
reef-pi Guide 5: Light Controller
3
Intermediate
Maintain consistent water level and salinity in aquariums using reef-pi
reef-pi Guide 4: Water Level Controller
4
Intermediate
Better than Gandalf when you need to find your way through Moria.
Circuit Playground Express Compass
7
Beginner
Controlling aquarium temperature with reef-pi
reef-pi Guide 3: Temperature Controller
5
Intermediate
Automate liquid reagent dosing using reef-pi
reef-pi Guide 7: Dosing Controller
2
Beginner
Monitor aquarium pH continuously using reef-pi
reef-pi Guide 6: pH Monitoring
7
Beginner
Build an Automated Marble Run!
Motorized Marble Machine
13
Beginner
Use the accelerometer on your Circuit Playground Express to detect movement
Make It Shake, Rattle, and Roll: Accelerometer Use
11
Beginner
This skull is keeping an eye on you...
HalloWing All-Seeing Skull
13
Beginner