One of our favorite maniacs over at LOOK MUM NO COMPUTER has used an oscillator. Here’s how he explains it:
So its simple! you solder a wire from the oscillator out straight to one leg of the timing crystal of the #gameboy, and you can override that and use the oscillator to clock the gameboys CPU! meaning you can adjust the pitch!
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.