Arduino UNO學習330．可變電阻5段開關

Arduino學習330．可變電阻5段開關

透過數據的輸入來控制LED燈或被動件的開動,

將數值1024分由4燈顯示,於0時關閉,

因此可分成0,256,256*2,256*3,256*4,總5段

安裝時注意燈腳的正負極

硬體準備

可變電阻*1

LED燈*4

220或330電阻*4

找出ArduBlock拼圖,並依序1~4對應亮起Pin4,Pin5,Pin6,Pin7,

int _ABVAR_1_A0 = 0 ;

void setup()

{

Serial.begin(9600);

        pinMode( 4 , OUTPUT);

        pinMode( 5 , OUTPUT);

        pinMode( 6 , OUTPUT);

        pinMode( 7 , OUTPUT);

}

void loop()

{

        _ABVAR_1_A0 = map ( analogRead(0) , 0 , 1023 , 1 , 5 )  ;

Serial.print( analogRead(0) );

Serial.println();

        if (( ( _ABVAR_1_A0 ) > ( 1 ) ))

        {

                digitalWrite( 4 , HIGH );

        }

        else

        {

                digitalWrite( 4 , LOW );

        }

        if (( ( _ABVAR_1_A0 ) > ( 2 ) ))

        {

                digitalWrite( 5 , HIGH );

        }

        else

        {

                digitalWrite( 5 , LOW );

        }

        if (( ( _ABVAR_1_A0 ) > ( 3 ) ))

        {

                digitalWrite( 6 , HIGH );

        }

        else

        {

                digitalWrite( 6 , LOW );

        }

        if (( ( _ABVAR_1_A0 ) > ( 4 ) ))

        {

                digitalWrite( 7 , HIGH );

        }

        else

        {

                digitalWrite( 7 , LOW );

        }

}

上傳後打開監控視窗並調整電位器，看到0~1023分別控4個燈，

是不是可以運用在家用燈的調整上

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