EE Bookshelf: The International System of Units, 8th Edition

SIPrefixes

Have you ever wondered what the official SI unit for magnetic field strength is (hint: ampere per metre), or maybe kinematic viscosity (square metre per second), or perhaps the correct abbreviations or symbols for some specific SI unit or value?  The Bible of SI Units, The International System of Units, 8th Edition, has all the (very official) answers and can be downloaded in PDF format in English or French from the website of the Bureau International des Poids et Mesures.  It’s actually just kind of find reading through one of the most important changes in recent scientific history, but it’s particularly useful in a world where there is still a lot of confusion over which units and scale are appropriate to use and when, and how to properly cite them!


As 2022 starts, let’s take some time to share our goals for CircuitPython in 2022. Just like past years (full summary 2019, 2020, and 2021), we’d like everyone in the CircuitPython community to contribute by posting their thoughts to some public place on the Internet. Here are a few ways to post: a video on YouTub, a post on the CircuitPython forum, a blog post on your site, a series of Tweets, a Gist on GitHub. We want to hear from you. When you post, please add #CircuitPython2022 and email circuitpython2022@adafruit.com to let us know about your post so we can blog it up here.

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.

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


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