Episode 4: What's the Matter?
What’s the Matter?
Paul Cutler ( @prcutler)
Monday, November 07, 2022 Welcome
Welcome to The Bootloader, a bi-weekly podcast bringing you news, project updates, and product talk
from the tech and maker scenes. Paul and Tod will bring you three interesting things and chat about them for a few minutes each.
Full transcript available here. View on Zencastr Show Notes Episode Intro
macOS Ventura cannot copy UF2 files (Paul #1) 00:21 Adafruit Blog post Raspberry Pi Blog You cannot drag and drop UF2 and HEX files using macOS Finder - it results in an error Lady Ada gave a good overview of the technical issues in Ask an Engineer Two workarounds Use the terminal:
cp -X blink.uf2 /Volumes/RPI-RP2/
Install a macOS short created by Alasdair Allen (author of the Rasperry Pi blog post above) Shortcut Works great! Update Shortcuts settings to allow shell scripts and just right click a UF2 image to transfer it Help out and file a bug report with Apple! Matter officially supported in iOS 16.1 (Tod #1) 2:37 3D printing for good causes (Paul #2) 7:00 3D Printing for Mental Health and Suicide Prevention Campaign The idea was started by a teacher, Abby Brown, at Torrey Pines High School. Each year the school has Yellow Ribbon week where students are learn about crisis resources and risk factors for suicide. The keychains were designed to give away to her students as a special way to end Yellow Ribbon Week. Each keychain contains a word, such as “Smile”, “Inspire”, “Create”, with about 10 different words. There’s a fundraising campaign where you can print one of the designs found on Cults3D and post it on Twitter and Instagram. Different organizations are matching the funds, with an opportunity to raise over $4000 by just printing and sharing! Joel Telling, Printed Solid, LDO Motors, and Alien3D [https://www.ic3dprinters.com/2022-toys/](3D Printed Toys for Tots campaign) Organized by IC3D in 2018, they work with volunteers in the 3D printing community to print toys for kids Over 69,000 toys printed in 2021! This year they have over 140 volunteers and have printed 27,000 toys so far. You can donate financially or sign up to help print toys Toys include an articulated alligator, a train engine, cars, low poly dinosaurs, and more. The signup period is now over to volunteer for printing, but keep an eye out for this next year. Twitch.tv Stream Hypno “video synthesizer” from Sleepy Circuits (Tod #2) 10:00 Have you ever taken a camcorder and point it at the TV to get weird video feedback? Have you ever enjoyed those trippy algorithmic screen savers? You can do both in real-time with devices called “ video synthesizers” I was at Synthplex last weekend and it was fun! It’s mostly a audio synth convention but there were a few non-audio things there too, like: Hypno by Sleepy Circuits is one such device Physically it’s a small box with knobs, sliders, and buttons. And an HDMI port! (and NDI over USB for streaming) Twiddle the knobs & sliders to create generative video patterns Source material can be video “oscillators”, camera feeds, video files Raspberry Pi 3 or 4-based, with Eurorack-compatible jacks to sync to your music Been in development since 2019 Extensive documentation and a big community, with an active forum (Product page]( https://sleepycircuits.com/hypno) Example videos on Instagram Hackster.io article from Gareth Halfacree The Open Colorimeter is an instrument with many applications, including measuring contaminants & pollutants in soil & water Based on the Adafruit PyBadge 3D printed case Published under open licenses MIT for the firmware Physical designs under a CC-4.0 license Excellent documentation with product guides and project tutorials Example: measure the blue dye in sports drinks IO Rodeo’s mission is to increase accessibility to scientific data collection tools by creating low-cost, open hardware instrumentation. Open Hardware and Software: GitHub Repository ffmpeg.guide makes configuring FFMPEG easy (Tod #3) 15:40 https://ffmpeg.guide FFMPEG is tool used behind-the-scenes by many video processors including MPlayer, Handbrake, VLC And used by many websites that handle A/V At it’s simplist, it converts video formats (AVI to MP4) but it can do so much more I use it to: Down-convert HDR video to SDR, resample to 720p (for players that don’t support HDR) Quickly cropping videos in a bit when shooting with a wide-angle lens Recompress 4K video to 1080p with reduced bitrate usable by Twitter/Youtube Convert audio of any format to .WAV Example FFMEG commands FFMPEG can do much more and it’s famously complicated to use It’s been around for over 20 years! wow! “ffmpeg.guide” is a “Flows & nodes”-based GUI for generating FFMPEG commandline commands Free for up to 5 nodes Developer post announcing it
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