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#circuitpythonparsec

Use the SD card detect pin in an SD card reader to know when the card's been inserted.

https://github.com/jedgarpark/parsec/blob/main/2025-03-06/simpl_sd_insert_code.py"

https://github.com/jedgarpark/parsec/blob/main/2025-03-06/cart_code.py"

https://www.adafruit.com/product/6003

Learn about CircuitPython: https://circuitpython.org

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JOHN PARK'S WORKSHOP LIVE 3/6/25

Pico-8 Wall Arcade

CircuitPython Parsec

JPPPoW recap

Projects

and more!

Visit the Adafruit shop online - http://www.adafruit.com

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See all the Alphabet LED Filaments here: (0:07)

https://www.adafruit.com/category/536

Alphabet LED Filament - Warm White Letter "A"

https://www.adafruit.com/product/6191

Alphabet LED Filament - Warm White Letter "B"

https://www.adafruit.com/product/6192

Alphabet LED Filament - Warm White Letter "C"

https://www.adafruit.com/product/6193

Alphabet LED Filament - Warm White Letter "D"

https://www.adafruit.com/product/6194

Alphabet LED Filament - Warm White Letter "E"

https://www.adafruit.com/product/6195

Alphabet LED Filament - Warm White Letter "F"

https://www.adafruit.com/product/6196

Alphabet LED Filament - Warm White Letter "G"

https://www.adafruit.com/product/6197

Alphabet LED Filament - Warm White Letter "H"

https://www.adafruit.com/product/6198

Alphabet LED Filament - Warm White Letter "I"

https://www.adafruit.com/product/6199

Alphabet LED Filament - Warm White Letter "J"

https://www.adafruit.com/product/6201

Alphabet LED Filament - Warm White Letter "K"

https://www.adafruit.com/product/6202

Alphabet LED Filament - Warm White Letter "L"

https://www.adafruit.com/product/6203

Alphabet LED Filament - Warm White Letter "M"

https://www.adafruit.com/product/6204

Alphabet LED Filament - Warm White Letter "N"

https://www.adafruit.com/product/6205

Alphabet LED Filament - Warm White Letter "O"

https://www.adafruit.com/product/6206

Alphabet LED Filament - Warm White Letter "P"

https://www.adafruit.com/product/6207

Alphabet LED Filament - Warm White Letter "Q"

https://www.adafruit.com/product/6208

Alphabet LED Filament - Warm White Letter "R"

https://www.adafruit.com/product/6209

Alphabet LED Filament - Warm White Letter "S"

https://www.adafruit.com/product/6210

Alphabet LED Filament - Warm White Letter "T"

https://www.adafruit.com/product/6211

Alphabet LED Filament - Warm White Letter "U"

https://www.adafruit.com/product/6212

Alphabet LED Filament - Warm White Letter "V"

https://www.adafruit.com/product/6213

Alphabet LED Filament - Warm White Letter "W"

https://www.adafruit.com/product/6214

Alphabet LED Filament - Warm White Letter "X"

https://www.adafruit.com/product/6215

Alphabet LED Filament - Warm White Letter "Y"

https://www.adafruit.com/product/6216

Alphabet LED Filament - Warm White Letter "Z"

https://www.adafruit.com/product/6217

- See all the Single ended nOOds here: (2:00)

https://www.adafruit.com/category/536

Single ended nOOds - 300mm long Flexible LED Filament - Warm White 3V

https://www.adafruit.com/product/6154

Single ended nOOds - 300mm long Flexible LED Filament - Pink 3V

https://www.adafruit.com/product/6152

Single ended nOOds - 300mm long Flexible LED Filament - Green 3V

https://www.adafruit.com/product/6151

Single ended nOOds - 300mm long Flexible LED Filament - Red 3V

https://www.adafruit.com/product/6150

Single ended nOOds - 300mm long Flexible LED Filament - Blue 3V

https://www.adafruit.com/product/6149

Single ended nOOds - 300mm long Flexible LED Filament - Cool White 3V

https://www.adafruit.com/product/6148

Single ended nOOds - 300mm long Flexible LED Filament - Ice Blue 3V

https://www.adafruit.com/product/6147

Single ended nOOds - 300mm long Flexible LED Filament - Natural White

3V https://www.adafruit.com/product/6146

RGB Full Color Backlight Display - 23mm x 75mm (2:24)

https://www.adafruit.com/product/6157

RGB Full Color Backlight Display - 84mm x 45mm (2:24)

https://www.adafruit.com/product/6156

RGB Full Color Backlight Display - 12mm x 40mm (2:24)

https://www.adafruit.com/product/6158

Adafruit RS232 Full Breakout with DE9-M (4:56)

https://www.adafruit.com/product/6253

Adafruit SHT45 Trinkey - USB Temp and Humidity Sensor with PTFE (5:46)

https://www.adafruit.com/product/6260

Adafruit DAC6578 Breakout - 8 x Channel 10-bit I2C DAC (6:19)

https://www.adafruit.com/product/6258

Adafruit Metro RP2350 with PSRAM (7:22) https://www.adafruit.com/product/6267

Visit the Adafruit shop online - http://www.adafruit.com

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New nEw NEWs New Products, News, and more: https://www.adafruit.com/newsletter #newnewnew

Shop for all of the newest Adafruit products: http://adafru.it/new

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Full tutorial: https://learn.adafruit.com/programmable-12v-outdoor-cafe-lights/overview

Cafe-style light strands with edison bulbs are a beautiful way to decorate your patio. They are a fantastic and classy way to light up any outdoor space. Wineries, bistros, and night markets use them to create a cozy, intimately lit space that's warm and inviting to diners, and they look fabulous in backyards of just about any size.

These lights are a programmable, addressable version of the cafe market lights you can find at the hardware store. Add arduino or CircuitPython code and you can turn your lights on in party mode, sending warm rainbow animations across your yard.

These lights require 12v power, and also need to hold up in an outdoor environment. This guide will focus on how to power 12v lights and also show how to use a waterproof enclosure to keep your lights safe from rain and weather.

Visit the Adafruit shop online - http://www.adafruit.com

Erin St Blaine - www.erinstblaine.com

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-----------------------------------------

This week's EYE ON NPI is a NAND in the HAND, it's ISSI Serial NAND Flash chips (https://www.digikey.com/en/product-highlight/i/issi/serial-nand-flash) available in a variety of sizes and footprints. These are great options for folks that need more data storage on their PCBs, but don't necessarily want an SD card. DigiKey has a selection of 1Gbit and 2Gbit chips, so you have tons of storage for data logs, images, recordings, or even filesystems. And the price is great, you'll pay much less per byte when buying NAND flash

There's plenty of times you'll need to access non-volatile memory on your microcontroller: graphics or audio files for a user interface, maps or almanac data for telemetry, sensor or usage logs, interpreted code scripts, firmware updates, security certificates, etc. these files are too big to be stored in simple EEPROM chips (https://www.digikey.com/short/0rf9t7qb) that max out at a few kB. The next step up is to use NOR Flash (https://www.digikey.com/short/jfp3bvph) - you can get up to 256 Megabytes in size! (https://www.digikey.com/en/products/detail/issi-integrated-silicon-solution-inc/IS25LP02GJ-RHLE/24617385)

Compared to EEPROM which comes in 1-Wire, I2C or SPI, you definitely have to use an SPI interface for NOR Flash. It's also possible on many chips to have 4-bit-at-a-time QSPI or even 8-bit OSPI interfacing for fast reads. And that's the thing that's really nice about NOR: instant reads of any byte anywhere in memory just like EEPROM. Unlike EEPROM you can't write just one byte at a time anywhere in the storage, you have to write 'page' and erase a 'sector' at a time - each page tends to be about 256 bytes, a sector is often 4KB. That means if you want to update a file, you'll need to read the whole 4K block into a memory cache, change the bytes you want to, then erase and re-write the block out. The good news though is once you write out a page, you can pretty much assume it will stay for many years: there's rarely corrupted data in NOR flash. And, although erasing and writing is a bit of a pain, the instant-access means NOR is great for 'XIP' or other dynamic memory access.

If NOR is so great, why bother with NAND? One is cost: a 2MB NOR chip isn't too bad about 45 cents in quantity (https://www.digikey.com/short/zff49fb7) but once you get to the biggest 256 MB ones (https://www.digikey.com/short/vffmp583) the pricing gets high pretty quickly: $15 in tray quantities. Considering you can get a 64G SD card for that price, NOR isn't very cost effective. Second is sizing: if you want 1GB for large files, it just isn't available. For that kind of density you need NOR flash.

NAND flash is the kind of flash you get when you buy a USB key or microSD card, although those have USB or SDIO interface chips (https://www.bunniestudios.com/blog/2013/where-usb-memory-sticks-are-born/) that are wire bonded to the NAND flash chips. You get a lot more for the price: instead of $15 for 256MB NOR, its $3 (https://www.digikey.com/short/r77p0922). You also don't need more pins! We always thought that NAND flash required a lot of pins since it comes in 48-TSSOP (https://www.digikey.com/short/8zqbmw31) but turns out that you can get it in a QSPI 8-pin format. That makes it easy to integrate without needing an 8-bit wide memory controller.

However, the architectural decisions that give ISSI NAND (https://www.digikey.com/short/jtp8ppdb) the massive size amp; low cost that we love also make it more complex to use than NOR flash. For one, you can no longer get random access to any byte you like. Instead, an entire page must be read at once into a 2176-byte cache, and then can be accessed. This is fine for most uses except we can't use XIP anymore and there are probably some memory access use cases that don't work nearly as nicely. Also that high density means that bits are more likely to go 'bad' and flip. While you can sorta-kinda get away with not doing error correction or wear leveling on NOR, you absolutely must do error correction and wear leveling on NAND! ISSI includes a simple multi-bit ECC system that can handle repairing up to 8 bits per 2176-byte page. And, every time there's ECC errors, you will need to 'refresh/rewrite' the data to clean it up. That refresh counts against the 60K or 100K write cycle - you are more likely to need wear-level management, even if you don't expect to write that often. Basically, check if your microcontroller SDK has a NAND controller library (https://github.com/D-Buckingham/NAND_flash) that can manage this all for you.

So, if you need to level up your storage, with easy-to-use SPI or QSPI-interface, ISSI has many NAND (https://www.digikey.com/en/product-highlight/i/issi/serial-nand-flash) options to let you quickly and inexpensively add 1 or 2 gigabits of non-volatile memory with built in ECC support and block cache. DigiKey will be stocking them shortly, sign up (https://www.digikey.com/short/jtp8ppdb) to be notified when they drop into stock mid-next month!

The hush-hush news from Adafruit in Industry City, Brooklyn, New York. Broadcast March 5, 2025

These are items or concept products that may/might/could be introduced into the Adafruit store in the future (or not)! It's not out yet, so please don't ask questions or ask when it'll be available....

Check out the Adafruit store for all the great products that are available and for coming soon products you can sign up to be notified when they are in stock. https://www.adafruit.com/new

Visit the Adafruit shop online - http://www.adafruit.com

Also visit DigiKey for Adafruit products at http://www.digikey.com/

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The wonderful world of Python on hardware! Episode 305 (March 5, 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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ASK AN ENGINEER 3/5/2025 LIVE!

Visit the Adafruit shop online - http://www.adafruit.com

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#electronics #tech #news