An edge-lit acrylic zoetrope based on the linux game Word War VI. The game was written by Steve Cameron, a fellow member of hackerspace TX/RX Labs. I was looking to do a zoetrope project and his vector based game was perfect for a straight forward laser etched animation.
The display is a series of 12 frames on a spinning acrylic disk with a ring of LEDs around the edge that are flashed every 1/12th of a revolution to make the animation appear. A stepper motor directly drives the disk which is being controlled by an Adafruit motor shield on an Arduino UNO. The LEDs are switched by one of the extra h bridges on the motor shield. All the timing is done open loop with the Arduino just counting nanoseconds between when to flash and when to step the motor.
Arduino is a great starting point for electronics, and with a motor shield it can also be a nice tidy platform for robotics and mechatronics. Here is a design for a full-featured motor shield that will be able to power many simple to medium-complexity projects.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.