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Product information "Adafruit ATtiny817 Breakout with seesaw - STEMMA QT / Qwiic"

This breakout board is a 'three-in-one' product:
  1. The ATtiny817 is part of the 'next generation' of AVR microcontrollers, and now we have a nice development/breakout board for it, with just enough hardware to get the chip up and running.
  2. It's also an Adafruit Seesaw board. Adafruit Seesaw is a near-universal converter framework that lets you add and extend hardware support to any I2C-enabled microcontroller or microcomputer. Instead of buying separate I2C GPIO expanders, ADCs, PWM drivers, etc., seesaw can be configured to provide a wide range of possibilities.
  3. With the STEMMA QT connectors, you can use the seesaw as an I2C controller or peripheral with plug-and-play support.
We have developed this board primarily for our own purposes: It's a mini development board that allows us to develop with the ATtiny817 just like with the ATSAMD09. With the silicon shortage in 2021, we are adapting some of our SAMD09 designs to the ATTiny8xx series and wanted a quick, minimal board to test our code on.

Each breakout comes with a populated and tested board as well as some pin headers. Each board is fairly minimalistic and contains:
  • ATtiny817 8-bit microcontroller
    • 8KB Flash, 512 bytes RAM, 128 bytes EEPROM
    • Internal oscillator can run up to 20MHz
    • Internal hardware multiplier
    • Can be operated with 2V to 5V current/logic (check datasheet for maximum speed at desired power)
  • 3.3V regulator - by default we run on the Vin voltage, which can be 5V, but there is a solder jumper on the bottom if you want to choose 3V logic.
  • Green power LED
  • Red indicator LED
  • Two STEMMA QT I2C connectors with 10K pull-up resistors connected to pins 10 and 11
This board comes with pre-programmed Seesaw peripheral code that lets it act as an "I2C-to-something" converter, basically a little I2C-driven friend that does all the timing-sensitive things that many microcontrollers and microcomputers can't do.

For example, if you use this breakout with the pre-burnt Seesaw firmware, you get
  • 14 x GPIO with selectable pull-up resistors
  • 9 x 10-bit ADC inputs - pins 0, 1, 2, 3, 6, 7, 18, 19, 20
  • 5 x 8-bit PWM outputs - pins 0, 1, 9, 12, 13
  • 1 x NeoPixel output (up to 60 pixels)
  • 1 x EEPROM with 127 bytes of NVM memory (useful for storing small access tokens or MAC addresses) - the last byte of the EEPROM is used for I2C address selection
  • 1 x interrupt output that can be triggered by one of the accessories - pin 15
  • 2 x I2C address selection pins - pin 16 and 17
  • 1 x activity LED on pin 5, active low tied
Of course, you can configure or reprogram the chip however you want to use it - we like to use the megaTinyCore from SpenceKonde, which provides Arduino peripheral support for this series of chips. To program the chip you will need an 'UPDI' programmer, which you can make using a USB to serial cable and a single 4.7K or 10K resistor.

Please note: The boards do not come with a bootloader. If you want to develop on the Seesaw (e.g. change the configuration), you need a separate UPDI programming setup! The firmware we have installed is available as this example sketch compiled with the megaTinyCore. We don't provide support for custom builds of Seesaw - we think this is cool and useful for the maker community!

For more details, including documentation on using seesaw, libraries for Arduino/CircuitPython/Raspberry Pi Python, schematics and more, visit the Adafruit seesaw guide
Properties
Zolltarifnummer: 85423111
Brand: Adafruit
Country of Origin: USA
EAN: 5904422372590
Gross Weight (kg): 0.004
Manufacturer ID: 5233
Product ID: ADA5233
Manufacturer

Adafruit

Adafruit: The expert for open source hardware

For more than ten years, programmers and tinkerers have benefited from the expertise of the Adafruit brand. Whether for beginners or proven experts, Adafruit has the right hardware components ready for your next IoT project.

Light comes into the dark with Adafruit NeoPixel

One extremely popular product line from the company's broad portfolio is Adafruit NeoPixel. These nifty LED components come in a wide variety of designs and color temperatures. NeoPixel modules are available, for example, in the form of a practical stick with five intelligent LEDs in red, green and blue (RGB) or in white (W), as a shield with 40 eye-saving RGBW LEDs in which all pixels are individually addressable, and as a jewel with seven RGBW LEDs that can be controlled with 8-bit PWM per channel.

Especially popular is the Adafruit NeoPixel Ring with 16 ultra-bright, intelligent RGB LEDs including integrated drivers, which you only need a single microcontroller to control. The trick is that the Adafruit NeoPixel rings form a chain, so to speak: You couple the output pin of one with the input pin of the other.

With the Adafruit NeoPixel products you can realize a wide variety of projects - there are virtually no limits to your creativity. With the help of an Arduino, a jumper cable and the appropriate software, you can control a NeoPixel ring individually and light up the small LEDs as you wish - either individually or in a specific combination. This way, you can also create your own Vu meter with the versatile LED components. Practical: To make programming Adafruit NeoPixel easier, Adafruit provides an Arduino library as well as a Python library.

Adafruit Feather Boards: Powerful hardware in a compact format

With Adafruit Feather, the hardware specialist from the States also has various powerful development boards in its range, which are essentially equivalent to an Arduino in terms of function. All of these boards are equipped with similar features; among other things, the pin assignment is the same and there are also many parallels when it comes to the microcontrollers and the battery charging properties. In addition, you can also find Feather boards with special devices like Bluetooth, Wi-Fi and cellular network connectivity as well as boards with microSD slot in Adafruit's product range. The name "Feather" is no coincidence: The boards are also characterized by being particularly compact and, above all, lightweight.

The range of top-class product highlights is wide: The STM32F405 Feather, for example, is the fastest CircuitPython board from Adafruit with an outstanding 168 MHz and meets the highest demands. It is equipped with a STEMMA QT / Qwiic port at the end, which makes it easy to connect to I2C sensors. The Adafruit Feather nRF52840 Express, on the other hand, shines with Bluetooth Low Energy and can also be used with CircuitPython thanks to native USB support.

Another important part of Adafruit's portfolio are the FeatherWings. With these expansion modules, you can also include components such as a display or a motor driver in your IoT project. The FeatherWing Proto is a proven classic in Adafruit's portfolio. This is ideally suited as a prototyping add-on for all Feather boards. The Adafruit FeatherWing Wing Tripler Mini Kit, on the other hand, is ideal if you want to connect a Feather to two other FeatherWings at the same time.

With the Adafruit MIDI FeatherWing Kit you get a music capable FeatherWing, thanks to which you can equip your Feather with MIDI input and output jacks. And with the Adafruit FeatherWing OLED you can easily add a small OLED display to your Feather board - no soldering required.

Adafruit: What's behind the brand

As an expert in open-source hardware, Adafruit has long since established itself in the electronics industry. The company was founded in 2005 by Limor Fried. At the time, the talented and innovative electrical engineer was still a student at the renowned Massachusetts Institute of Technology (MIT). To this day, Fried is CEO of the electronics giant, which is now headquartered in New York. The company's name also goes back to its founder: Fried was once known on the World Wide Web by the nickname "Ladyada" - a tribute to the famous IT pioneer Ada Lovelace.

Adafruit says it is committed to getting more people excited about technology and science - and thanks to its first-class products, the hardware expert from the USA is sure to succeed!

Manufacturer and safety information
Manufacturer information
Adafruit Industries, LLC
168 39th Street 1905CC
US 11232 Brooklyn, New York
https://www.adafruit.com
support@adafruit.com

WEEE number: 20453810

Responsible person for the EU
Sertronics GmbH
Am Studio 20d
DE 12489 Berlin
https://www.berrybase.de
info@berrybase.de

Safety instructions
  • Keep device away from small children, danger of swallowing due to small components.
  • Protect from moisture, static electricity and strong vibrations.
  • Only operate with the recommended power supply to avoid damage.
  • Do not accidentally short-circuit or mechanically stress the contacts.
  • Take protective measures against electrostatic discharge (ESD) during processing.
  • Only use in a well-ventilated environment or suitable enclosures to avoid overheating.
  • Do not use defective or damaged components, risk of fire or injury.
  • Do not operate in a flammable environment, as overheating or sparks may occur.
  • Dispose of the device or circuit boards at the end of their service life in accordance with local regulations for electronic waste.
  • Connect batteries or external power sources in accordance with the manufacturer's instructions and dispose of them immediately if they are defective.
  • When disposing of the device, ensure that no environmentally harmful substances are released.
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