Grove - LED Bar
Grove LED Bar is comprised of a 10 segment LED gauge bar and an MY9221 LED
controlling chip. It can be used as an indicator for remaining battery life, voltage, water
level, music volume or other values that require a gradient display. There are 10 LED
bars in the LED bar graph: one red, one yellow, one light green, and seven green bars.
Demo code is available to get you up and running quickly. It lights up the LEDs
sequentially from red to green, so the entire bar graph is lit up in the end. Want to go
further? Go ahead and code your own effect.
Version
Product Version Changes Released Date
Grove LED Bar V1 Initial June 2014
Grove LED Bar V2 Improved the power supply Oct 2015 Features
Input Voltage: 3.3V/5V
Each LED segment can be controlled individually via code
Intuitive display
Flexible power option, supports 3-5.5DC
Available demo code
Suli-compatible Library
Tip
More details about Grove modules please refer to Grove System
Specification
Parameter Value/Range
Operating voltage 3.V
Operation Temperature -20 to +80
Peak Emission Wavelength-RED(Current 20mA) 630-637nm
Peak Emission Wavelength-Yellow Green(Current 20mA ) 570-573nm
Peak Emission Wavelength-Yellow(Current 20mA ) 585-592nm
Luminous Intensity Per Segment-RED(Current 20mA ) 50-70mcd
Luminous Intensity Per Segment-Yellow Green(Current 20mA ) 28-35mcd
Luminous Intensity Per Segment-Yellow(Current 20mA ) 45-60mcd
LED segment 10
Size 40mm * 20mm