Over the past year, I’ve been getting more and more acquainted with the SAM D21 32-bit ARM-Cortex M0+ microcontroller. It’s a lovely little chip and you can find it all over the place – notably in the Arduino Zero and several of Adafruit’s M0 boards. I’ve written several articles about various aspects of the SAM D21 and I’ve even shipped two products that use it as their brain.
In this post, I’ll cover the basics of the SAM D21’s brown-out detector, why it’s not just useful but critical, and how it can help you make your SAM D21-based project more reliable and resilient. Even if you think your project will never be subjected to a brown-out event, I promise it’s worth your time to learn about the brown-out detector and how it can save you from all kinds of unexpected behavior.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.