给墙表添加夜灯，让它变成夜晚墙上最靓的物件

家里有个墙表，用了几年了没坏，也不想换。可是自己经常晚上起夜时候是半夜，从厕所回来就想看下时间了解下自己的起夜规律。但是老墙表由于没夜灯，所以都看不到时间。又迷迷糊糊的去睡了。但这个问题一直都想解决呀。于是想了好一阵子怎么去弄。用微波测距是早已经想好的主零件，然后就是灯的问题，这个选了好久，最初的想法是用几个LED串联一起，但是又觉得不好看，而且要焊接。用WS2812B led吧，可以是可以，就是怎么弄成圆形的呢。有点麻烦，而且有个要求是灯不必那么亮，刚刚看清表盘就好，而且还要灯平滑关闭。最后是想到了用点阵，也就是MAX7219模块，这个模块既经济又连线方便。


经过几天的密集测试，未发现Bug，准备把主控换成Arduino nano，并配上外壳，让它正式服役。

--------------物料清单如下-------------
元件除了点阵均来自DFRobot，具体参数参考商城的产品WIKI，点阵有配专门的介绍，购自某宝

微波传感

arduino UNO Romeo



--------------连线图如下-------------

-----------------代码如下-------------
[mw_shl_code=applescript,false]/*

这个代码是gada888所做，2020-05-25
转载请注明出处

*/
#include <MsTimer2.h> //Timer interrupt function
int pbIn = 0; // Define the interrupt PIN is 0, that is, digital pins 2
//int ledOut = 13;
int count=0;
volatile int state = LOW; //Define ledOut, default is off

#include "LedControlMS.h"
//pin 5 is connected to the DataIn
// pin 4 is connected to the CLK
//pin 3 is connected to LOAD
#define NUM_MTX 1 //number of matrices attached is one
LedControl lc=LedControl(5,4,3, NUM_MTX);//

/////////////////SETUP/////////////////
void setup()
{
Serial.begin(9600);
//pinMode(ledOut, OUTPUT);
attachInterrupt(pbIn, stateChange, FALLING); // Sets the interrupt function, falling edge triggered interrupts.
MsTimer2::set(1000,process); // Set the timer interrupt time 1000ms
MsTimer2::start();//Timer interrupt start

lc.shutdown(0,true);
  lc.shutdown(1,true);
  lc.setIntensity(0,8);
  lc.clearDisplay(0);
  lc.setIntensity(1,8);
  lc.clearDisplay(1);
}

void loop()
{
Serial.println(count); // Printing times of 1000ms suspension
delay(1);
if(state == HIGH) //When moving objects are detected later, 2s shut down automatically after the ledout light is convenient.
{
delay(2000);
state = LOW;
Alloff();
}
}
void stateChange() //Interrupt function
{
count++;
}
void process() //Timer handler
{
if(count>1) //1000ms interrupt number greater than 1 is considered detected a moving object (this value can be adjusted according to the actual situation, equivalent to adjust the de
{
state = HIGH;
Allon();
count=0; //Count zero
}
else
count=0; //In 1000ms, interrupts does not reach set threshold value is considered not detect moving objects, interrupt the count number is cleared to zero.
}


void Allon() {     
  lc.shutdown(1,true);
  lc.shutdown(0,false);
  for (int row=0; row<8; row++)
  {
    for (int col=0; col<8; col++)
    {
      lc.setLed(0,col,row,true); // turns on LED at col, row
      delay(10);
      }
  }
}

void Alloff() {     
  lc.shutdown(1,true);
  lc.shutdown(0,false);
  for (int row=0; row<8; row++)
  {
    for (int col=0; col<8; col++)
    {
      lc.setLed(0,col,row,false); // turns on LED at col, row
      delay(10);
      }
  }
}
[/mw_shl_code]

首先本人并没有逐行注释的习惯，但为了让阅读者顺利读码，特意在关键的地方打上了注释，

你就是最靓的仔

LuckyE 发表于 2020-5-30 16:01
你就是最靓的仔

可不敢当

果然很闪亮