# CircuitPython Rotary Trinkey Brightness Crank ## Overview https://youtu.be/WhHm7yaTjzg This device will help encourage you to spend less time with social media or tech devices. It will turn the brightness of your device down as long as you aren't cranking the rotary encoder arm. You must continue cranking in order to raise and keep the brightness level up. This is a good project to show how you can use CircuitPython and HID to interact with mobile devices without having to write an app! ![](https://cdn-learn.adafruit.com/assets/assets/000/103/191/medium800/3d_printing_Untitled.jpg?1624913519) ## Parts ### Adafruit Rotary Trinkey - USB NeoPixel Rotary Encoder [Adafruit Rotary Trinkey - USB NeoPixel Rotary Encoder](https://www.adafruit.com/product/4964) It's half USB Key, half Adafruit Trinket, half rotary encoder_..._it's **Rotary Trinkey** , the circuit board with a Trinket M0 heart, a NeoPixel glow, and a rotary encoder body. [We were inspired by this...](https://twitter.com/todbot/status/1365107469345648643) In Stock [Buy Now](https://www.adafruit.com/product/4964) [Related Guides to the Product](https://learn.adafruit.com/products/4964/guides) ![Video of a woman turning the rotary on Rotary Trinkey. The LED changes rainbow colors.](https://cdn-shop.adafruit.com/product-videos/640x480/4964-06.jpg) ### Rotary Encoder + Extras [Rotary Encoder + Extras](https://www.adafruit.com/product/377) This rotary encoder is the best of the best, it's a high-quality 24-pulse encoder, with detents and a nice feel. It is panel mountable for placement in a box, or you can plug it into a breadboard (just cut/bend the two mechanical side tabs.) We also include a nice soft-touch knob with an... Out of Stock [Buy Now](https://www.adafruit.com/product/377) [Related Guides to the Product](https://learn.adafruit.com/products/377/guides) ![Rotary Encoder with rubbery knob](https://cdn-shop.adafruit.com/640x480/377-02.jpg) Or ### USB OTG Host Cable - MicroB OTG male to A female [USB OTG Host Cable - MicroB OTG male to A female](https://www.adafruit.com/product/1099) This cable looks like a USB micro cable but it isn't! Instead of a USB A Plug, it has a USB A Socket on the end. This cable is designed for use with OTG (On the Go) host devices (like the Arduino Due or many tablets) so you can connect a mouse, keyboard, or any other USB device. You'll... In Stock [Buy Now](https://www.adafruit.com/product/1099) [Related Guides to the Product](https://learn.adafruit.com/products/1099/guides) ![USB OTG Host Cable with Micro B OTG male to A female in black](https://cdn-shop.adafruit.com/640x480/1099-00.jpg) - [Next Page](https://learn.adafruit.com/circuitpython-rotary-trinkey-brightness-crank/3d-printing.md) ## Featured Products ### Adafruit Rotary Trinkey - USB NeoPixel Rotary Encoder [Adafruit Rotary Trinkey - USB NeoPixel Rotary Encoder](https://www.adafruit.com/product/4964) It's half USB Key, half Adafruit Trinket, half rotary encoder_..._it's **Rotary Trinkey** , the circuit board with a Trinket M0 heart, a NeoPixel glow, and a rotary encoder body. [We were inspired by this...](https://twitter.com/todbot/status/1365107469345648643) In Stock [Buy Now](https://www.adafruit.com/product/4964) [Related Guides to the Product](https://learn.adafruit.com/products/4964/guides) ### Rotary Encoder + Extras [Rotary Encoder + Extras](https://www.adafruit.com/product/377) This rotary encoder is the best of the best, it's a high-quality 24-pulse encoder, with detents and a nice feel. It is panel mountable for placement in a box, or you can plug it into a breadboard (just cut/bend the two mechanical side tabs.) We also include a nice soft-touch knob with an... Out of Stock [Buy Now](https://www.adafruit.com/product/377) [Related Guides to the Product](https://learn.adafruit.com/products/377/guides) ### iOS Lightning to USB OTG Cable [iOS Lightning to USB OTG Cable](https://www.adafruit.com/product/3940) Your iOS phone or tablet may not have a USB port on the bottom but that doesn't mean you can't use it to connect USB devices. Secretly known as a 'Camera Connector' or 'MIDI Connector' cable, this doohicky plugs into the bottom of your iOs device and gives you a USB A... In Stock [Buy Now](https://www.adafruit.com/product/3940) [Related Guides to the Product](https://learn.adafruit.com/products/3940/guides) ### USB OTG Host Cable - MicroB OTG male to A female [USB OTG Host Cable - MicroB OTG male to A female](https://www.adafruit.com/product/1099) This cable looks like a USB micro cable but it isn't! Instead of a USB A Plug, it has a USB A Socket on the end. This cable is designed for use with OTG (On the Go) host devices (like the Arduino Due or many tablets) so you can connect a mouse, keyboard, or any other USB device. You'll... In Stock [Buy Now](https://www.adafruit.com/product/1099) [Related Guides to the Product](https://learn.adafruit.com/products/1099/guides) ## Related Guides - [Adafruit Rotary Trinkey](https://learn.adafruit.com/adafruit-rotary-trinkey.md) - [Raspberry Pi Rotary Encoder Animated Gif Player](https://learn.adafruit.com/python-rotary-animated-gif-player-two-different-ways.md) - [Custom HID Devices in CircuitPython](https://learn.adafruit.com/custom-hid-devices-in-circuitpython.md) - [DC, Servo, Stepper Motors and Solenoids with the Pico](https://learn.adafruit.com/use-dc-stepper-servo-motor-solenoid-rp2040-pico.md) - [Digital Clock with CircuitPython](https://learn.adafruit.com/digital-clock-with-circuitpython.md) - [Ambient Color Control Pad](https://learn.adafruit.com/ambient-color-controller.md) - [MacroPad Summer Olympics Hotkeys](https://learn.adafruit.com/macropad-olympic-hotkeys.md) - [Pocket Galaxy](https://learn.adafruit.com/pocket-galaxy.md) - [Boomy Pi Airplay Boombox](https://learn.adafruit.com/boomy-pi-airplay.md) - [USB C CC Resistor Fixer Case](https://learn.adafruit.com/resistor-fixer-case.md) - [Trinket “Question Block” Sound Jewelry](https://learn.adafruit.com/trinket-question-block-sound-jewelry.md) - [Adafruit Fruit Jam](https://learn.adafruit.com/adafruit-fruit-jam.md) - [MP3 Feather - Gordon Cole](https://learn.adafruit.com/mp3-feather-gordon-cole.md) - [Coffee Rater](https://learn.adafruit.com/coffee-rater.md) - [Stained Glass Lamp](https://learn.adafruit.com/stained-glass-lamp.md)