标签：print width can 符号 idt run make delay pre
（一）、抢答器：
代码
1 int redled = 8; 2 int yellowled = 7; 3 int greenled = 6; 4 5 int redpin = 5; 6 int yellowpin = 4; 7 int greenpin = 3; 8 9 int restpin = 2; 10 int red,yellow,green; 11 12 void setup() { 13 // put your setup code here, to run once: 14 pinMode(redled, OUTPUT); 15 pinMode(yellowled, OUTPUT); 16 pinMode(greenled, OUTPUT); 17 pinMode(redpin, INPUT); 18 pinMode(yellowpin, INPUT); 19 pinMode(greenpin, INPUT); 20 } 21 22 void loop() { 23 // put your main code here, to run repeatedly: 24 red = digitalRead(redpin); 25 yellow = digitalRead(yellowpin); 26 green = digitalRead(greenpin); 27 28 if (red == LOW) { RED_YES(); } 29 if (yellow == LOW) { YELLOW_YES(); } 30 if (green == LOW) { GREEN_YES(); } 31 } 32 33 void RED_YES(){ 34 while(digitalRead(restpin) == 1){ 35 digitalWrite(redled, HIGH); 36 digitalWrite(greenled, LOW); 37 digitalWrite(yellowled, LOW); 38 } 39 CLEAR_LED(); 40 } 41 42 void YELLOW_YES(){ 43 while(digitalRead(restpin) == 1){ 44 digitalWrite(redled, LOW); 45 digitalWrite(greenled, LOW); 46 digitalWrite(yellowled, HIGH); 47 } 48 CLEAR_LED(); 49 } 50 51 void GREEN_YES(){ 52 while(digitalRead(restpin) == 1){ 53 digitalWrite(redled, LOW); 54 digitalWrite(greenled, HIGH); 55 digitalWrite(yellowled, LOW); 56 } 57 CLEAR_LED(); 58 } 59 60 void CLEAR_LED(){ 61 digitalWrite(redled, LOW); 62 digitalWrite(greenled, LOW); 63 digitalWrite(yellowled, LOW); 64 }
（二）、PWM调光
代码
int potpin = 0; int ledpin = 11; int val = 0 ; void setup() { // put your setup code here, to run once: pinMode(ledpin, OUTPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: val = analogRead(potpin); Serial.println(val); analogWrite(ledpin, val/4); delay(10); }
（三）、蜂鸣器
代码
int buzzer = 8; // buzzer break, can not make noise void setup() { // put your setup code here, to run once: pinMode(buzzer, OUTPUT); } void loop() { // put your main code here, to run repeatedly: long frequency = 300; tone(buzzer, frequency); delay(100); noTone(buzzer); delay(2000); // while(1){ // for(int i; i < 80; i++){ // digitalWrite(buzzer, HIGH); // delay(1); // digitalWrite(buzzer, LOW); // delay(1); // } // for(int i; i < 100; i++){ // digitalWrite(buzzer, HIGH); // delay(2); // digitalWrite(buzzer, LOW); // delay(2); // } // } }
（四）、感光灯
代码
int potpin = 0; int ledpin = 11; int val; void setup() { // put your setup code here, to run once: pinMode(potpin, OUTPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: val = analogRead(potpin); Serial.println(val); analogWrite(ledpin, val); delay(10); }
（五）、三色灯
代码
int redpin = 11; int bluepin = 10; int greenpin = 9; int redval, blueval, greenval; int i = 0; void setup() { // put your setup code here, to run once: pinMode(redpin, OUTPUT); pinMode(bluepin, OUTPUT); pinMode(greenpin, OUTPUT); pinMode(redval, INPUT); pinMode(blueval, INPUT); pinMode(greenval, INPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: i++; if(i < 200){ redval += 1; greenval -= 1; blueval = 1; } else if(i < 400){ redval -= 1; greenval = 1; blueval += 1; } else if(i < 600){ redval = 1; greenval += 1; blueval -= 1; } else { i = 0; } analogWrite(redpin, redval); analogWrite(greenpin, greenval); analogWrite(bluepin, blueval); Serial.print(i, DEC); Serial.print( " R:"); Serial.print(redval, DEC); Serial.print( " B:"); Serial.print(blueval, DEC); Serial.print( " G:"); Serial.print(greenval, DEC); }
（六）、热敏传感器
代码
int sensorInPin = 0; int ledpin = 8; int sensorVal = 0; void setup() { // put your setup code here, to run once: pinMode(ledpin, OUTPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: sensorVal = analogRead(sensorInPin); Serial.print(sensorVal); analogWrite(ledpin, sensorVal); delay(5000); }
（七）、倾斜传感器
代码
int sensorInPin = A5; int ledpin = 8; void setup() { // put your setup code here, to run once: pinMode(ledpin, OUTPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: int i; while(1){ i = analogRead(sensorInPin); Serial.print(i); if(i > 1000){ digitalWrite(ledpin, HIGH); } else { digitalWrite(ledpin, LOW);} } }
（八）、火焰传感器
代码
int fireInPin = A5; int beep = 8; int val = 0; void setup() { // put your setup code here, to run once: pinMode(beep, OUTPUT); //pinMode(fireInPin, INPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: //while(1){ val = analogRead(fireInPin); Serial.print(val); Serial.print("\n"); if(val > 200){ digitalWrite(beep, HIGH); } else { digitalWrite(beep, LOW); } // } }
忘记拍照了！
（九）、声音传感器
代码
int soundInPin = 2; int ledpin = 13; int val; void setup() { // put your setup code here, to run once: pinMode(ledpin, OUTPUT); pinMode(soundInPin, INPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: val = analogRead(soundInPin); Serial.println(val); delay(2000); if(val == HIGH){ digitalWrite(ledpin, HIGH); delay(5000); digitalWrite(ledpin, LOW); } }
忘记拍照了！
总结：
（1）虽说面包板+加跳线更加灵活，但是也容易接触不牢的问题。
（2）蜂鸣器中要使用Tone()函数，在无源蜂鸣器的应用中。
（3）Serial.begin(9600)，未开启串口函数，9600为波特率(bps, byte per second)，波特率表示每秒钟传送的码元符号的个数，
是衡量数据传送速率的指标，它用单位时间内载波调制状态改变的次数来表示；9600的波特率的信道，
理论上每秒可以传输9600个二进制位，也就是9600/8个英文字母的数据量，也就是1200个字节，大约1.2KB。
而19200则是每秒可传输2400字节，大约2.4KB。
（4）Serial.print(a, DEC)，为输出十进制数b。Serial函数的用法参考https://blog.csdn.net/hhaowang/article/details/88529842
（5）火焰传感器并不是通过火焰的温度来实现的，而是通过亮度来实现的。
（6）声音传感器中需要50k欧的电阻，这里没有就没有实现。
（7）是否是长时间使用UNO，会出现设备不稳定的情况？，再没有外接输入源的时候，模拟（或数字）信号端，有信号的变化，
最大到1023！不知道怎么回事！
（8）关于硬件方面的使用还需要加强！
Arduino UNO 学习 （二） 抢答器、PWM调光、蜂鸣器、感光灯、三色灯、热敏传感器、倾斜传感器、火焰传感器
标签：print width can 符号 idt run make delay pre
原文地址：https://www.cnblogs.com/heze/p/12763971.html
