Lesson 17--Microduino Button Control Digital Tube

Language:	English  • 中文

Objective This tutorial will teach you how to use the buttons to add and subtract the digital tube displayed value. There are two buttons, one is used to increase the value, another is used to decrease value. Equipment Microduino-Core Microduino-FT232R Other hardware equipment Breadboard Jumper one box Breadboard one piece Digital tube one Buttons two 220Ω (100Ω~1kΩ) one USB Data cable one Schematic Pin Table 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/MicroduinoDigitalSubtraction #include "SevSeg.h" SevSeg sevseg; int i=5; void setup() { //Define used pins sevseg.Begin(1,2,3,4,5,6,7,8,9,10,11,12,13); pinMode(2, INPUT); //D2 use to add pinMode(3, INPUT); //D3 use to subtract sevseg.PrintOutput(); sevseg.NewNum(i, 4); } void loop() { //Enable the output function sevseg.PrintOutput(); if(digitalRead(2)==HIGH) {//If press button 2 i++; sevseg.NewNum(i, 4); delay(200); //Delay 50ms } else if(digitalRead(3)==HIGH) {//If press button 3 i--; sevseg.NewNum(i, 4); delay(200); //Delay 50ms } } 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: There are two buttons and use the same connection. One end connects to power and on the other end, a signal line and GND in parallel. Step 3: Run program Step 4： Digital displays initial value 5, then press that two buttons respectively, what will happen!! Result Press two buttons respectively, the value will increase one or decrease one. Video http://v.youku.com/v_show/id_XNjc2ODQ3NDM2.html