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    Xadow - LED 5x7 The Xadow LED 5x7 consists of a 5x7 monochrome LED matrix and a LED controller. You can sending command to the LED controller through I2C interface (address 0x21) to display numbers, letters or even pixel images. This could come handy sometime in your project. Features  LED Matrix  Plug-and-play if connected with RePhone Kit Create  Open source and modular design  Slim and small  Built-in 11 PIN Xadow Connectors for full flexible connection with other Xadow Modules  Stackable, chain-able and sew-able with other Xadow Modules Specification Item  Value  Microcontroller  STM32F030F4  Core  ARM® 32‐bit Cortex® ‐M0 CPU  Power Supply  3.3 ~ 6 V (via breakout pins)  Flash  16 KB  SRAM  4 KB  Clock Speed  48 MHz  Interfaces  Interface with Xadow GSM+BLE through I2C (7‐bit address 0x21)  Dimension  25.37mm × 20.30mm / 1” × 0.8”  Hardware Overview Use it with RePhone Kit Create Display characters: Without any programming, you can connect it to the Core Module (Xadow GSM+BLE) of your 'RePhone Kit Create' to display numbers and letters using the 'Actuator Control'. Set 'If This Then That' : You can also set conditions in the 'If This Then That' to trigger the Xadow LED 5x7 to display specific characters or pixel images. Rephone Community We’ve been looking for a better place where our backers (RePhone Users) can sit together, warmly and comfortably, have conversations about RePhone, discuss technical problems, share ideas/projects, and give feedback on the modules’ development in the future. And then here we go, the RePhone Community. Now join us in the RePhone Community! Together we seek answers, make interesting stuff, care about each other, and share our experiences.                                                                                                   http://wiki.seeedstudio.com/Xadow_LED_5x7/ 9‐10‐18