On each Arduino-compatible chip runs a tiny program called the bootloader. The bootloader is a helper that reads your Arduino sketch over USB and burns it into the little microcontroller brain.
FLORA and GEMMA both come with bootloaders when your get them in the mail, but there are a few reasons you might want to know how to burn your own bootloader, besides the nerd cred. Maybe you’re an AVR hacker and you want to change the bootloader’s functions, or maybe you’re building your own circuit and need to flash a new blank chip. And sometimes it’s possible to corrupt your bootloader– flashing it again can bring the board back to life.
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.