View source for Lesson 13--Microduino Single Digital Display with A Point

{{Language | 第十三课--Microduino 单个数码管带点显示}}
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==Objective==

This lesson will teach you how to use digital tube to display numbers and the decimal point by Microduino.

==Equipment==
'''[[Microduino-Core]]'''
'''[[Microduino-FT232R]]'''
*Other hardware equipment
**Breadboard Jumper            one box   
**Breadboard  	               one piece  
**Digital tube                 one
**20kΩ resistor (100Ω~1kΩ)     one 
**1uF capacitor (0.1uF~10uF)   one  
**USB Data cable               one


==Schematic==
[[File:第十三课-Microduino单个数码管带点显示原理图.jpg|600px|center|thumb]]

light the decimal point using sevseg.NewNum(9, 0), the second paramter uses to control the postion of decimal point.

Pin Table:
{| class="wikitable"
|-
! Microduino Pin !! Digital Tube Pin
|-
| D10 || 1
|-
| D9 || 2
|-
| D5 || 3
|-
| D8 || 4
|-
| D13 || 5
|-
| D7 || 6
|-
| D6 || 7
|-
| Not used || 8
|-
| D11 || 9
|-
| D12 || 10
|}

==Program==
Download program:
https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Advanced/MicroduinoDigitalShowPoint

<source lang="cpp">

    /*  

     7 segment digital tube:
          
               A
              ____
             |    |
          F  |____|  B
             | G  |
          E  |____|  C
                    o DP
               D
              
          Pin distribution:
          
          10 9 8 7 6
           ________
          |   __   |
          |  |__|  |
          |  |__|o |
          |________|
          
          1 2 3 4 5  
          
          * How to connect to Microduino?
          * Check the Pin 3 and 9 firstly, generally they are grade-level, the digital tube in kit is common anode, so they both are anode, we can use any of them.
          * 1 (E) Connect to Microduino Pin 10
          * 2 (D) Connect to Microduino Pin 9
          * 3  Because only use one digital tube, so this pin or pin 8 connects to Microduino Pin 5
          * 4 (C) Connect to Microduino Pin 8
          * 5 (DP) Connect to Microduino Pin 13
          * 6 (B) Connect to Microduino Pin 7
          * 7 (A) Connect to Microduino Pin 6
          * 8 Because only use one digital tube, so this pin or pin 3 connects to Microduino Pin 5
          * 9 (F) Connect to Microduino Pin 11
          * 10 (G) Connect to Microduino Pin 12
          
    */
     
    #include "SevSeg.h"
    SevSeg sevseg;
    void setup() {
    //Define the used pin
		sevseg.Begin(1,2,3,4,5,6,7,8,9,10,11,12,13);
     
    }
     
    void loop() {
      //Enable output function
		sevseg.PrintOutput();
        sevseg.NewNum(9, 0);     //Digital tube function outputs number, the second parameter is the positon of decimal point. 
      }

</source>

==Debug==
Firstly download the library, unzip it and put to libraries folder of Arduino IDE, then restart Arduino IDE to load library.

Library link: https://docs.google.com/file/d/0Bwrp4uluZCpNN1Q4dmFZX1MzWVE/edit

This library can drive 4bits digital tube and support number, decimal point and easy to use.

Step 1: Copy the code to IDE and compile it.

Step 2: Set up circuit, as follows:

[[File:第十三课-Microduino单个数码管带点显示连接图.jpg|600px|center|thumb]]

Step 3: Run program



==Result==

Digital will display number and decimal point.

==Video==