Thea Flowers On Using the SAMD21’s Brown-out Detector

A screenshot of a hex editor comparing two files, the first one showing empty values for the first 256 bytes

Thea Flowers of Winterbloom writes in detail about using the brown-out detector on the MicroChip ATSAMD21 microcontroller to make hardware be more reliable and resilient to flaky power. The SAMD21 is used in Winterbloom’s Castor & Pollux synthesizer module, and also in the CircuitPython-powered Big Honking Button.

Using the SAM D21’s brown-out detector

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.

From https://blog.thea.codes/sam-d21-brown-out-detector/


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.

Join 30,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — Supply delays have made their way inland with railway bottlenecks

Wearables — Light up the outside

Electronics — Current limiting!

Python for Microcontrollers — Python on Microcontrollers Newsletter: 9K Subscribers, Cheat Sheets and More! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — WFH Stress Monitor, Helping Parkinson's Patients with IoT, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 9/15/2021 Featuring Adafruit LED Glasses Front Panel – 116 RGB LEDs with I2C Driver – STEMMA QT / Qwiic! (Video)

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.