Skip to content

Crowbits-LED Bar


The LED light bar is a digital output module. Through the light bar, you can display the battery power, voltage value, water depth, sound size, and any other scene that needs to represent the gradient value.



  • Detect various signals


  • Interface Typeļ¼šGPIO
  • Operating Voltage: 3.3V DC
  • Dimensions: 31.5(L)*24.5(W)*13(H)mm

Application Ideas

  • Display test information


The following sketch demonstrates a simple application of digital display.

1.You need to prepare a Crowbits motherboard, such as Crowbits-UNO board.

2.Connect the module to the D2 and D3 interface on the Crowbits-UNO board, as shown in the figure:

Crowbits-LED Bar-Wiki 1.JPG

3.Download the library Crowbits-LED Bar library. Unzip and put it in the libraries file, for example: C:\Program Files (x86)\Arduino\libraries.

4.Upload the following code to the Crowbits-UNO board.

  Crowtai LED Bar - Level Example
  This example will show you how to use setLevel() function of this library.
  The setLevel() function illuminates the given number of LEDs from either side.

  Syntax setLevel(level)
  0  = all LEDs off
  5  = 5 LEDs on
  10 = all LEDs on

#include <Grove_LED_Bar.h>
Grove_LED_Bar bar(2, 3, 0);  // Clock pin, Data pin, Orientation

void setup()
  // nothing to initialize

void loop()
  // Walk through the levels
  for (int i = 0; i <= 10; i++)


5. After the code is uploaded successfully, you will see the light bar change.

Crowbits-LED-Bar Wiki 2.JPG