Making a breathing night light with sea glass #Trinket #NeoPixels

John Graham-Cumming provides a repost of a nice project that makes a “breathing” night light from glass washed up on a beach and a microcontroller + LEDs.

This code drives a string of four Adafruit NeoPixel LEDs connected to an Adafruit 5V Trinket causing the four LEDs to glow white with varying brightness that emulates the rhythm of human breathing.

The four LEDs are hidden inside the sea glass and kept inside an old glass jar.

The code is pretty simple. It uses the Adafruit NeoPixel library to drive the four LEDs. The LEDs are literally cut with scissors from a strip and then bent into a circle and super-glued together.

Breathing

The breathing is based on the old “sleep LED” on Macs (the explanation I originally used was to be found here and can now be found on the Internet archive). (Note that Adafruit’s Ladyada did some reverse engineering work on the Mac’s breathing light way back and the origin of the formula is from a comment on her post).

The formula for the LED brightness is

where x is the number of milliseconds since start. It looks like this when plotted (there’s a sharper intake of breath than exhalation):

See John’s full project post here and on GitHub.


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 35,000+ 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 — Chip inventories rise as demand falls

Wearables — Go insane with a membrane (button or keypad)

Electronics — Shift away from basic arithmetic

Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython 8.0 RC 1 Out, Board Guides, and Much More! #CircuitPython #Python @ThePSF @micropython @Raspberry_Pi

Adafruit IoT Monthly — Cat Doorbell, Deep Algae Bloom Detector, 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! — JP’s Product Pick of the Week 1/31/23 Feather RP2040 Scorpio NeoPXL8 Driver @adafruit @johnedgarpark

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.