本文章將教會(huì)大家如何使用Arduino制作搶答器。

一、目標(biāo)實(shí)現(xiàn)：

使用Arduino編程，使得按下按鈕對(duì)應(yīng)的LED燈會(huì)亮起，按下結(jié)束所有LED燈熄滅。

二、前期準(zhǔn)備：

軟件準(zhǔn)備：Arduino 18.8

硬件準(zhǔn)備：Arduino開(kāi)發(fā)板，LED燈，220Ω電阻，面包板，杜邦線，按鍵。

三、接線：

如下圖：

四、編寫(xiě)程序：

int LED_R = 6;
int LED_Y = 7;
int LED_G = 8;
int PIN_R = 3;
int PIN_Y = 4;
int PIN_G = 5;
int OVER = 2;
void setup() {
pinMode(LED_R, OUTPUT);
pinMode(LED_Y, OUTPUT);
pinMode(LED_G, OUTPUT);
pinMode(PIN_R, INPUT);
pinMode(PIN_Y, INPUT);
pinMode(PIN_G, INPUT);
}
void loop() {
if (digitalRead(PIN_R) == LOW)
{
RED();
}
if (digitalRead(PIN_Y) == LOW) 
{
YELLOW();
}
if (digitalRead(PIN_G) == LOW)
{
GREEN();
}
}
void clear_led()
{
digitalWrite(LED_R, LOW);
digitalWrite(LED_Y, LOW);
digitalWrite(LED_G, LOW);
}
void RED()
{
while (digitalRead(OVER) == 1)
{
digitalWrite(LED_R, HIGH);
digitalWrite(LED_Y, LOW);
digitalWrite(LED_G, LOW);
}
clear_led();
}
void YELLOW()
{
while (digitalRead(OVER) == 1)
{
digitalWrite(LED_R, LOW);
digitalWrite(LED_Y, HIGH);
digitalWrite(LED_G, LOW);
}
clear_led();
}
void GREEN()
{
while (digitalRead(OVER) == 1)
{
digitalWrite(LED_R, LOW);
digitalWrite(LED_Y, LOW);
digitalWrite(LED_G, HIGH);
}
clear_led();
}

五、Arduino搶答器成果展示：