The following sketch demonstrates a simple application of digital display.Ģ.Download the library Crowtail- 4-Digit Display library Unzip and put it in the libraries file . For projects that require of alpha-numeric display, this can be a nice choice. It only takes 2 digital pins of Arduino or Crowduino to control the content, even the luminance of this display. But in our Crowtail gadget, we utilize a TM1637 to scale down the controlling pins into 2 Crowtail pins. Usually 4 digit display module is a 12 pin module.
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