16级翻译翻译用翻译

1、Traffic Lights交通信号灯View code on GitHub请在GitHub上查看代码Click here点击这里查看Introduction介绍In this project youre going to build a traffic lights system:在这个项目中，你将建立一个交通信号灯系统：l There are 3 LEDs with different colors (green, yellow and red) to mimic the traffic lights for the cars.用三种不同颜色的灯（绿色，黄色和红色）模拟汽车的交通信号灯l

2、There are 2 LEDs with different colors (green and red) to mimic the traffic lights for the pedestrians。用两种不同颜色（绿色和红色）的灯模拟行人的交通信号灯l There is a pushbutton to mimic the ones in the pedestrians traffic lights.有一个按钮来模仿的行人交通信号灯Parts Required零件要求Grab all the needed components for this project.获取此项目所需的所有组件。

3、l 1x Breadboardl Arduino UNO read Best Arduino Starter Kitsl 3x 5mm LED (1x red, 1x yellow, 1x green)l 2x 3mm LED (1x red, 1x green)l 5x 220Ohm Resistorl 1x 10kOhm Resistorl 1x pushbuttonl Jumper Wiresl 1x面包板l ArduinoUNO - 阅读最佳Arduino入门套件l 3x5mm LED（1x红色，1x黄色，1x绿色）l 2x3mm LED（1x红色，1x绿色）l 5x220欧姆电阻l

4、1x10k欧姆电阻l 1x按钮l 线Im using LEDs of different sizes but if you dont have LEDs of different sizes, it is ok.我用的是不同尺寸的LED，但如果你没有不同尺寸的LED，也是可以的。The project still works.该实验仍然可行。Schematics原理图Assemble all the parts by following the schematics below.按照下面的原理图组装所有零件。Code代码You dont need any library for this co

5、de. The code is very simple. Heres some tips to better understand whats going on.此代码不需要任何库。 代码非常简单。 这是一些帮你更好地理解实验过程的提示。l The car light is always green, and so the pedestrian light is always red unless someone presses the button.车灯始终为绿色，因此行人灯始终为红色，除非有人按下按钮。l When someone presses the button heres what

6、 happens:当有人按下按钮时，会发生以下情况：l The car light changes to yellow and then to red车灯变为黄色然后变为红色l The pedestrian light changes to green行人灯变为绿色l The lights are in this state for a while (in the code this time is the variable crossTime) 灯处于此状态一段时间（代码中time是变量crossTime）l The pedestrian green light flashes and go

7、es to red行人绿灯闪烁并变为红色l The car light changes from red to green车灯从红色变为绿色All these actions will be inside the function changeLights(). Everytime you want tochange the lights, you just need to call the changeLights() function.Copy the following code to your Arduino IDE, and upload it to your Arduino boa

8、rd.Make sure you have the right board and COM port selected.所有这些操作都将在函数changeLights()中。 每次你想要的改变灯光，你只需要调用changeLights()函数。将以下代码复制到Arduino IDE，并将其上传到Arduino板。确保选择了正确的板和COM端口。View code on GitHub在GitHub上查看代码/* Rui Santos* Complete Project Details */int redCar = 13;int yello

9、wCar = 12;int greenCar = 11;int greenPed = 2;int redPed = 3;int button = 7;int crossTime = 2000;unsigned long changeTime;void setup() /初始化计时器changeTime = millis();/这里我们将引脚初始化为输出pinMode(redCar, OUTPUT);pinMode(yellowCar, OUTPUT);pinMode(greenCar, OUTPUT);pinMode(redPed, OUTPUT);pinMode(greenPed, OUTP

10、UT);pinMode(button, INPUT);/打开绿灯digitalWrite(greenCar, HIGH);digitalWrite(redPed, HIGH);digitalWrite(redCar, LOW);digitalWrite(yellowCar, LOW);digitalWrite(greenPed, LOW);Serial.begin(9600);void loop() /这个变量会告诉我们按钮是否被按下int state = digitalRead(button);Serial.println(state);/如果按下按钮，并且自上次按钮起已超过5秒pressi

11、f (state = HIGH & (millis() - changeTime) 5000) /调用该功能来改变灯光changeLights();void changeLights() digitalWrite(greenCar, LOW); /绿色LED将熄灭digitalWrite(yellowCar, HIGH); /黄色LED将亮2秒钟delay(2000);digitalWrite(yellowCar, LOW); /黄色LED将熄灭digitalWrite(redCar, HIGH); /红色LED指示灯将亮起5秒钟digitalWrite(redPed, LOW);digitalWrite(greenPed, HIGH);delay(crossTime);/ 绿灯闪烁for (int x=0; x10; x+) digitalWrite(greenPed, LOW);dela