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LED bar display is actually like multiple LED, it is not like Arduino modules like TM 1637. Here is a guide explaining the basics, circuit diagram, code on Arduino and LED Bar Display. We need no extra library for the LED bar display but we need correct circuit and logically correct code to use this electronic component. Big advantage of LED Bar Display is it is quite cheap, we can use with IC like 555 instead of Arduino – we can use it without any programmable microcontroller. This component is useful to visually represent progress or quantity like in case with temperature, distance and so on. We can use this component with TM 1637 like 7 segment LED display simultaneously using the multiprocessing capability. We demonstrated multiprocessing capability of Arduino in TM 1637 traffic light timer.
Arduino and LED Bar Display : Circuit Diagram, Code
Each segment of LED Bar Display is equivalent to one LED. For 10 segment LED Bar Display, we will 10 x 2 = 20 legs. The circuit diagram for just basic example will be similar like using 10 LED on breadboard :
The middle diagram is somewhat Arduino’s official example of Bar Graph (but we have more easy thing) :
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https://www.arduino.cc/en/Tutorial/BarGraph |
If we add the LED or each segment of pin from pin number 2 to 11 then this can be a sample code :
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void setup(){ pinMode(2, OUTPUT); pinMode(3, OUTPUT); pinMode(4, OUTPUT); pinMode(5, OUTPUT); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(8, OUTPUT); pinMode(9, OUTPUT); pinMode(10, OUTPUT); pinMode(11, OUTPUT); } void loop(){ digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(2,LOW); delay(100); digitalWrite(3,LOW); delay(100); digitalWrite(4,LOW); delay(100); digitalWrite(5,LOW); delay(100); digitalWrite(6,LOW); delay(100); digitalWrite(7,LOW); delay(100); digitalWrite(8,LOW); delay(100); digitalWrite(9,LOW); delay(100); digitalWrite(10,LOW); delay(100); digitalWrite(11,LOW); delay(100); digitalWrite(2,HIGH); delay(100); digitalWrite(12,HIGH); delay(100); digitalWrite(3,HIGH); delay(100); digitalWrite(11,HIGH); delay(100); digitalWrite(4,HIGH); delay(100); digitalWrite(10,HIGH); delay(100); digitalWrite(5,HIGH); delay(100); digitalWrite(9,HIGH); delay(100); digitalWrite(6,HIGH); delay(100); digitalWrite(8,HIGH); delay(100); digitalWrite(7,HIGH); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11,LOW); delay(100); digitalWrite(10,LOW); delay(100); digitalWrite(9,LOW); delay(100); digitalWrite(8,LOW); delay(100); digitalWrite(7,LOW); delay(100); digitalWrite(6,LOW); delay(100); digitalWrite(5,LOW); delay(100); digitalWrite(4,LOW); delay(100); digitalWrite(3,LOW); delay(100); digitalWrite(2,LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2,LOW); delay(100); digitalWrite(12,LOW); delay(100); digitalWrite(3,LOW); delay(100); digitalWrite(11,LOW); delay(100); digitalWrite(4,LOW); delay(100); digitalWrite(10,LOW); delay(100); digitalWrite(5,LOW); delay(100); digitalWrite(9,LOW); delay(100); digitalWrite(6,LOW); delay(100); digitalWrite(8,LOW); delay(100); digitalWrite(7,LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11,LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8,LOW); delay(100); digitalWrite(9,LOW); delay(100); digitalWrite(10,LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5,LOW); delay(100); digitalWrite(6,LOW); delay(100); digitalWrite(7,LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2,LOW); delay(100); digitalWrite(3,LOW); delay(100); digitalWrite(4,LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(2, LOW); delay(100); digitalWrite(2, HIGH); delay(100); digitalWrite(3, LOW); delay(100); digitalWrite(3, HIGH); delay(100); digitalWrite(4, LOW); delay(100); digitalWrite(4, HIGH); delay(100); digitalWrite(5, LOW); delay(100); digitalWrite(5, HIGH); delay(100); digitalWrite(6, LOW); delay(100); digitalWrite(6, HIGH); delay(100); digitalWrite(7, LOW); delay(100); digitalWrite(7, HIGH); delay(100); digitalWrite(8, LOW); delay(100); digitalWrite(8, HIGH); delay(100); digitalWrite(9, LOW); delay(100); digitalWrite(9, HIGH); delay(100); digitalWrite(10, LOW); delay(100); digitalWrite(10, HIGH); delay(100); digitalWrite(11, LOW); delay(100); digitalWrite(11, HIGH); delay(100); digitalWrite(11,LOW); delay(100); digitalWrite(10,LOW); delay(100); digitalWrite(9,LOW); delay(100); digitalWrite(8,LOW); delay(100); digitalWrite(7,LOW); delay(100); digitalWrite(6,LOW); delay(100); digitalWrite(5,LOW); delay(100); digitalWrite(4,LOW); delay(100); digitalWrite(3,LOW); delay(100); digitalWrite(2,LOW); delay(100); } |
