Lesson 13--Microduino Single Digital Display with A Point

Language:	English  • 中文

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 light the decimal point using sevseg.NewNum(9, 0), the second paramter uses to control the postion of decimal point. 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 /* 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. } Debug Fristly download the library, uncompress 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: Step 3：Run program Result Digital will display number and decimal point. Video http://v.youku.com/v_show/id_XNjc2NjU3OTky.html