How to order Contact us Distributors Reviews
Register / Login

Select currency

If you'd like to view estimated pricing in other currencies then please select a currency below below.

GBP USD EUR JPY AUD NOK CHF NZD CAD

Please note:

  • Currency conversions are estimates and for information only
  • Your order will be billed in GBP
  • All prices exclude VAT / other local sales taxes
  • Shipping calculated during checkout


Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic

by Adafruit
An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic An image of Adafruit I2C QT Rotary Encoder Breakout with NeoPixel - STEMMA QT / Qwiic

Rotary encoders are soooo much fun! Twist em this way, then twist them that way. Unlike potentiometers, they go all the way around, and often have little detents for tactile feedback.

But, if you've ever tried to add encoders to your project you know that they're a real challenge to use: timers, interrupts, debouncing...

This Stemma QT breakout makes all that frustration go away - solder in any 'standard' PEC11-pinout rotary encoder with or without a push-switch (please note an encoder is not included!). The onboard microcontroller is programmed with Adafruit's seesaw firmware and will track all pulses and pins for you and then save the incremental value for querying at any time over I2C. Plug it in with a Stemma QT cable for instant rotary goodness, with any kind of microcontroller from an Arduino UNO up to a Raspberry Pi.

You can use this Arduino library to control and read data with any compatible microcontroller. There is also CircuitPython/Python code for use with computers or single-board Linux boards.

It's also easy to add this breakout to a breadboard - with six 0.1"-spaced breakout pads. Power with 3 to 5V DC and then use 3 or 5V logic I2C data. The INT pin can be configured to pulse low whenever rotation or push-buttoning is detected so you do not have to spam-read the I2C port to detect motion.

There's a NeoPixel onboard, that can display any color you like. It's also controlled over I2C for additional visual feedback or keep it off if you like. On the back there's a green power LED as well as a red INT LED that, if the interrupt is configured, will blink when the interrupt fires.

Using the three onboard address jumpers, you can connect up to 8 of these rotary encoders on a single I2C port. The first one will be at address 0x36, the last one at 0x3D when all three jumpers are soldered closed.

To keep the board nice and compact, only 1" x 1" Adafruit made the footprint for the rotary encoder at a 45-degree angle. Since it rotates around freely there's no need for it to be at a 90-degree angle to the PCB. Each order comes with one assembled and tested PCB breakout and a small piece of header.

To get you going fast, Adafruit spun up a custom made PCB with the seesaw chip and all supporting circuitry, in the STEMMA QT form factor, making them easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the rotary encoder or to chain them with a wide range of other sensors and accessories using a compatible cable. QT Cable is not included, but we have a variety in the shop.

This breakout does not come with an encoder, so you can pick whatever encoder you like. You can also use encoders without detents or with a different number of detents per rotation, of course! You'll need to solder the encoder and optional header onto the PCB to use with a solderless breadboard. but it's fairly easy and takes only a few minutes even for a beginner.

TECHNICAL DETAILS

  • Default I2C address is 0x36
  • Product Dimensions: 25.6mm x 25.3mm x 4.6mm / 1.0" x 1.0" x 0.2"
  • Product Weight: 2.4g / 0.1oz

Revision History:

  • As of June 15, 2022 - This board may come with a different regulator than AP2112K due to parts shortages. The regulator can provide at least 250mA.

LEARN

  • Primary Guide: Adafruit I2C QT Rotary Encoder - A rotary encoder with STEMMA QT!

Reviews

User photos

Rotary encoders are soooo much fun! Twist em this way, then twist them that way. Unlike potentiometers, they go all the way around, and often have little detents for tactile feedback.

ADA4991

You must register for an account and be logged in to view pricing or place an order on the Pimoroni Wholesale store.

If you represent a school or university, a business, or reseller of Maker products then you can sign up for a wholesale account.

If you already have an account you can login to your account here.

Alternatively the easiest way to get your hands on the products we offer is to order them directly from our customer facing online store.

SKU
ADA4991
EAN
0769894018361
Brand
Adafruit
Stock available
20+ units
Backorder not allowed on this product
Weight
5g

Video introduction

Guides & tutorials

Search

 

Region

Your search returned no results.

Subscribe

We'll keep you up to date with new product launches!

The good ship

We've been sailing the Maker seas offering our wares since 2012.

  • read about our history
  • what our customers say
  • find a local distributor
  • contact our business team

We manufacture all of our products locally at our workshop in Sheffield, UK

Under one roof

Pimoroni are your one-stop shop for bulk and education purchasing of Raspberry Pi, Pimoroni, micro:bit, Adafruit, Sparkfun, and many other brands.

If you have any questions about what we offer then drop us a line.

Pimoroni Ltd

Unit 1, Parkway Business Park,
Parkway Drive,
Sheffield,
S9 4WN,
United Kingdom

Registered in England and Wales:
Company №: 07510759
VAT Reg №: GB 140 8707 21