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NEW PRODUCTS THIS WEEK
Tiny Code Reader from Useful Sensors: The Tiny Code Reader from Useful Sensors is a small, low-cost hardware module that reads QR codes. It’s designed to be a simple way to provision a system, for example, by providing the Wi-Fi network name and password or providing input when there’s no keyboard.
Internally, the Tiny Code Reader bundles an image sensor and a small microcontroller into a single board, but to make it as easy as possible to build into products, the folks at Useful Sensors wanted to hide those implementation details. It returns information about any QR codes it sees over an I2C connection.
The board uses a standard STEMMA QT / Qwiic connector for the I2C interface. If you’re using a standard connector, the wire colors are yellow for SCL, blue for SDA, red for 3.3V, and black for GND. The sensor supports I2C bus speeds of up to 400k baud with 3.3V power; other voltage levels (like, 5V) are not supported.
Adafruit STEMMA Piezo Driver Amp – PAM8904: Piezos make noise when you put an AC voltage across them: and the bigger the Vpp the louder they are. With your standard 3V logic microcontroller you can make 3Vpp with a PWM out, or 6Vpp differential with two complimentary outputs. But what if you want even louder? Or if you’re using a piezo to sense distance using ultrasonic bounces?
We found the nifty PAM8904, which is an amplifier specifically designed for driving piezo elements – and unlike audio amplifiers it’s good for up to 300 KHz! It’s a switched-cap piezo driver that has bridge-tied load (BTL) output and up to 3x voltage multiplication thanks to a built in boosting circuit for up to ~13Vpp.
We whipped up a quick breakout in our 2mm JST-PH STEMMA form-factor to make it easy for anyone who wants to beep their boops very loudly.
Adafruit Metro M7 with microSD – Featuring NXP iMX RT1011: Your favorite electronics companies have collaborated to make the fastest Metro ever! For this new product, DigiKey, NXP and Adafruit all contributed the stuff the stuff they know best: shipping parts fast (DigiKey), designing microcontrollers (NXP) and crafting great products with tutorials (that’s us, Adafruit!)
We teamed up to present to you the Adafruit Metro M7 with microSD! An NXP iMX RT1011 microcontroller powers this board with a 500 MHz ARM Cortex M7 processor. There’s 8 MB of execute-in-place QSPI for firmware + disk storage and 128KB of SRAM in-chip. Arduino-compatible headers make using any ‘shield’ daughterboard easy. And, as you can expect, there’s a micro SD card slot wired up right on board so that you can read files or data log easily to removable, wear-leveled storage.
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