This module is ideally suited to display levels of battery charge, water tanks, etc…! The Whadda bar graph module allows any microcontroller board to easily drive a 10-segment blue LED bar graph. The module uses a TM1651 LED driver chip to drive the individual LED segments, which can be controlled by using only 2 GPIO pins of a microcontroller (such as an Arduino® compatible board). It should be noted that some of the LED-segments are wired together, resulting in 8 different controllable states of the LED bar graph.
Features:

1. drive a 10-segment blue LED bar graph
2. controllable by 2 GPIO pins

Specifications:

1. supply voltage: 3,3 - 5 V DC
2. color: blue
3. driver chip : TM1651
4. number of LED segments: 10
5. number of level indicators: 8
6. interface: 2 wire serial

manual_wpi471.pdf

ce_rohs_open.pdf