meowPi is a Raspberry Pi program that emits a meow when a trip wire is activated.
I used the adafruit tutorials all the time, so I figure I should at least try to give back. The git link I posted is a tutorial/code for building a trip wire using an HC-SR04 ultrasonic module.
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.