gary
This project is a backpack board that sits on the back of four digit 7 segment LEDs (.56 inches tall), and it interfaces the LED to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.
gary
This project is a backpack board that sits on the back of matrix style keypads (4×4, 4×3, etc.), and it interfaces the keypad to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.
gary
This project is a backpack board that sits on the back of [BuyDisplay.com](http://www.buydisplay.com/default/i2c-16×2-oled-serial-character-display-module-screen-yellow-on-black) OLED character displays (16×2), and it interfaces the display to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.
gary
This project is a backpack board that sits on the back of [Newhaven](http://www.newhavendisplay.com/oled-slim-character-oleds-c-119_825.html) OLED character displays (16×2, 20×2, and 20×4), and it interfaces the display to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.
gary
This project is a backpack board that sits on the back of many common LCD character displays (16×1, 16×2, 20×2, 20×4, etc.), and it interfaces the display to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.
gary
This project is a backpack board that sits on the back of four digit 7 segment LEDs (.8 inches tall), and it interfaces the LED to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.
gary
This project is a backpack board that sits on the back of four digit 7 segment LEDs (.36 inches tall), and it interfaces the LED to the I²C bus for easy connection to many microcontrollers. A software library is available that works with [Arduino](http://arduino.cc), [Particle](http://particle.io) (Photon, Electron, and Core) and [Raspberry Pi](https://www.raspberrypi.org) boards.