LED Bar Graph: Red
$1.75
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This single color LED bar graph is comprised of 10 red LEDs. Useful for battery meters, sound bars and other projects where visual measurements are key.
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These 10 segment bar graph LEDs have many uses. With a compact footprint, and simple hookup, they are easy for prototyping or finished products. Essentially, they are 10 individual red LEDs housed together.
Features:
- LED Bar Graph
- Number of pins: 20
- Number of LEDs: 10
- Size: 0.98 x 0.39 x 0.59 inches (2.5 x 1.0 x 1.5 cm)
- Forward voltage: 2.1V typ
- Brightness: 14mcd typ
- Forward Current (Per Segment): 25mA
- Max Reverse Voltage: 5v
- 10 segments
- Colors of bars:
- 10 Red
- Every 2 pins controls one bar of the bar graph
- Works with TS-459 Bar Graph LED Driver chip
- Arduino Pin Connection
1 ----- D2 - R220 - GND
2 ----- D3 - R220 - GND
3 ----- D4 - R220 - GND
4 ----- D5 - R220 - GND
5 ----- D6 - R220 - GND
6 ----- D7 - R220 - GND
7 ----- D8 - R220 - GND
8 ----- D9 - R220 - GND
9 ----- D10 - R220 - GND
10 ----- D11 - R220 - GND
- Arduino Code
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4); // LCD2004
int segPins[] = { 2,3,4,5,6,7,8,9,10,11 };
int idxBar = 0;
int minVal = 50;
int maxVal = 350;
int delayTime = 200;
byte digitsFill[10][10] = {
{1,0,0,0,0,0,0,0,0,0},
{1,1,0,0,0,0,0,0,0,0},
{1,1,1,0,0,0,0,0,0,0},
{1,1,1,1,0,0,0,0,0,0},
{1,1,1,1,1,0,0,0,0,0},
{1,1,1,1,1,1,0,0,0,0},
{1,1,1,1,1,1,1,0,0,0},
{1,1,1,1,1,1,1,1,0,0},
{1,1,1,1,1,1,1,1,1,0},
{1,1,1,1,1,1,1,1,1,1}
};
void setup()
{
lcd.init(); // initialize the lcd
lcd.backlight();
lcd.print("start LCD2004");
for (int i=0; i<11; i++)
{
pinMode(segPins[i], OUTPUT);
}
delay(1000);
lcd.clear();
}
void loop()
{
lcd.setCursor(0,0);
lcd.print("D024:Bargraph LED");
idxBar = map(analogRead(A0), minVal, maxVal, 0, 9);
lcd.setCursor(0,1);
lcd.print("analog=" + (String)analogRead(A0) + " ");
for(int j=0; j<10; j++)
{
digitalWrite(segPins[j], digitsFill[idxBar][j]);
lcd.setCursor(0,2);
lcd.print("idxBar="+(String)idxBar+" ");
}
delay(delayTime);
}
TS2435
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This single color LED bar graph is comprised of 10 red LEDs. Useful for battery meters, sound bars and other projects where visual measurements are key.