A 4 digit display module usually uses 12 pins. In this Grove gadget the TM1637 is used to scale down the control pins into two Grove pins. This way It only takes two digital pins from an Arduino to...

  Things you can do with Jay-D: Play multiple music files simultaneously Add equalizers, fade between songs and control their BPMs Load new songs on the included SD card Design a custom li...

Particularly suitable for reducing the number of I/Os required when used with Arduino or other microcontroller, the I²C interface has jumpers to activate the backlight and contrast adjustment which...