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(Re-broadcast, LIVE was not working for all social media on Sunday night, so here ya go!

This week at our desk, we spent a lot of our focused engineering time working on e-paper display drivers. These displays are a lot more annoying than TFTs, which have settled on standardized MIPI command sets. Also, they have custom “waveforms” used to configure the refresh technique. By default, we use the built-in waveforms from OTP memory, but it’s possible to load new waveforms, letting us do funky stuff like coax 4-grayscale out of a “monochrome” display.

We also designed a simple moisture sensor PCB for an ultra-low-cost kit to be used by students—sometimes it’s okay to under-design for cost reasons!

Notes document is available here, with timecodes: https://github.com/adafruit/adafruit-circuitpython-weekly-meeting/blob/main/2025/2025-06-30.md

Join here for the chat all week: http://adafru.it/discord

The CircuitPython Weekly normally is held at 2pm US ET/11am us PT on Mondays. Check the #circuitpython-dev channel on Discord for notices of change in time and links to past meetings. Meeting times are also available in iCal format using the following link: https://raw.githubusercontent.com/adafruit/adafruit-circuitpython-weekly-meeting/master/meeting.ical or view it in your browser: https://open-web-calendar.herokuapp.com/calendar.html?url=https://raw.githubusercontent.com/adafruit/adafruit-circuitpython-weekly-meeting/master/meeting.ical

CircuitPython development is sponsored by Adafruit. Please support them by purchasing hardware from https://adafruit.com.

Reminders: Podcast available on most services. Let us know if we’re missing some.

0:00 Housekeeping 01:57 Community News 03:52 State of CircuitPython, Libraries & Blinka 11:54 Hug Reports 13:09 Status Updates 20:25 In the Weeds 21:26 Wrap-up

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JOHN PARK’S WORKSHOP LIVE 6/26/25 Knobby Sequencer Build CircuitPython Parsec JPPPoW recap Projects and more!

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Adafruit NAU7802 24-Bit ADC - STEMMA QT / Qwiic (0:11) https://www.adafruit.com/product/4538

Adafruit 2.9” Tri-Color eInk / ePaper Display FeatherWing - SSD1680 - Red Black White (1:08) https://www.adafruit.com/product/4778

Adafruit 2.9” Red/Black/White eInk Display Breakout - THINK INK - SSD1680 Chipset (1:08) https://www.adafruit.com/product/1028

Adafruit AS5600 Magnetic Angle Sensor - STEMMA QT (2:30) https://www.adafruit.com/product/6357

Adafruit TPS61169 Constant Current Boost Converter for LEDs (4:15) https://www.adafruit.com/product/6354

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ASK AN ENGINEER 6/25/2025 LIVE!

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LIVE CHAT IS HERE! http://adafru.it/discord Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/

SHOW and TELL 6/25/2025

🎙️ New to streaming or looking to level up? Check out StreamYard and get $10 discount! 😍 https://streamyard.com/pal/d/5925163669389312

This week @adafruit Pedro is back from his special assignment, he’s chatting about his secret project using Sparkle Motion Mini. Our Not A Typewriter project gets a video. Prototyping new projects. The Rapid Render segment is back! Plus, a time lapse video for community makes.

YouTube Video https://youtu.be/khEFYlZObyA

Learn Guide https://learn.adafruit.com/not-a-typewriter

Feather RP2040 USB Host https://www.adafruit.com/product/5723

I2C Solenoid Driver https://www.adafruit.com/product/6318

5V Mini Solenoid https://www.adafruit.com/product/2776

NeoPixel LED Netting https://www.adafruit.com/product/6159

Sparkle Motion Mini https://www.adafruit.com/product/6160

🎙️ New to streaming or looking to level up? Check out StreamYard and get $10 discount! 😍 https://streamyard.com/pal/d/5925163669389312

Free STLs, Instructions and code on https://learn.adafruit.com/not-a-typewriter Build a “Not A Typewriter” with I2C Solenoid Driver and Adafruit Feather RP2040 running CircuitPython code. This device is designed to give your modern computer keyboard the essence of a vintage typewriter.

The 3D printed case is designed to look like a classic typewriter and features a real service bell. It has two mini solenoids, one to emulate the loud clack of the typebars, and the other to triumphantly announce the ding of the carriage return.

Learn Guide https://learn.adafruit.com/not-a-typewriter

Feather RP2040 USB Host https://www.adafruit.com/product/5723

I2C Solenoid Driver https://www.adafruit.com/product/6318

5V Mini Solenoid https://www.adafruit.com/product/2776

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LIVE CHAT IS HERE! http://adafru.it/discord Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/

The wonderful world of Python on hardware! Episode 310 (May 7, 2025). This is our weekly Python video highlights! Ladyada and PT review the Python on hardware news of the week.

The news comes from the Python community, Discord, Adafruit communities and more. It’s part of the comprehensive newsletter we do each week.

The video playlist of episodes is here: http://adafru.it/pohepisodes

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You can build a tap-to-play video player using a Raspberry Pi 5, Adafruit’s NFC Breakout and NFC cards. Full Tutorial: https://learn.adafruit.com/nfc-raspberry-pi-media-player

To play a movie, just tap an NFC card over the 3D printed case. A python script runs code that launches movies in the VLC media player.

The NFC cards are fitted inside a 3D printed case inspired by VHS cassette tapes.

This project aims to make the movie watching experience more special by creating a physical experience. No streaming networks or wifi necessary!

Raspberry Pi 5 8GB: https://www.adafruit.com/product/5813

NFC Breakout: https://www.adafruit.com/product/364

M.2 HAT+ https://www.adafruit.com/product/5902

Active Cooling Fan https://www.adafruit.com/product/5815

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Full tutorial: https://learn.adafruit.com/chinese-dragon-puppet-with-motion-reactive-flame-effect/overview

Make a Chinese Dragon puppet with a dramatic flame LED effect. The lights are motion-reactive so he lights up when you shake him. This project uses an Adafruit Circuit Playground Express with a built-in motion sensor and NeoPixel LED lights. The code is written in Microsoft MakeCode, an easy-to-use drag and drop code editor. (Or maybe in this case, a dragon-drop code editor.)

This is an easy beginner-level project that involves a little bit of soldering. You can download our code sample, or learn to make your own flame effects. This is a fantastic project to do with kids.

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Collin gives Alexa a new persona courtesy of the classic 2-XL trivia bot. Check out the full tutorial available here: https://learn.adafruit.com/echo-2-xl

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Music by Collin Cunningham: http://soundcloud.com/CollinMel

Tonight on Pseudorandom, special guest Phil Burgess speaks on the joys & meticulous details of prop recreation, miniature MAME arcades, and more.

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Watch our latest project videos: http://adafru.it/latest

New tutorials on the Adafruit Learning System: http://learn.adafruit.com/

Music by bartlebeats: http://soundcloud.com/bartlebeats