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delay() 与闪烁时序

暂停执行以产生可见的闪烁节奏

delay() 与闪烁时序 是 CoddyKit 上的免费 Arduino & IoT Academy 课时。这是第 3 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Arduino & IoT Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Arduino & IoT Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Add a Pause

Switching a pin on and off happens in microseconds, far too fast to see. To make a real blink, you tell the board to wait with delay. ⏱️

delay Speaks Milliseconds

The delay function pauses your sketch for a number of milliseconds. One second is 1000 of them, so delay(1000) waits one full second.

delay(1000);

Freeze the Light On

Turn the LED HIGH, then call delay. The board sits still and the LED stays lit for the whole pause before doing anything else.

digitalWrite(ledPin, HIGH);
delay(1000);

Then Hold It Off

Now drive the pin LOW and delay again. The LED stays dark for that pause, giving the off half of your blink its own visible moment.

digitalWrite(ledPin, LOW);
delay(1000);

The Full Blink Loop

Stack those four lines inside loop() and you get a steady blink: on, wait, off, wait, repeat. That is the classic Blink sketch.

void loop() {
  digitalWrite(ledPin, HIGH);
  delay(1000);
  digitalWrite(ledPin, LOW);
  delay(1000);
}

Faster or Slower

Change the number to change the rhythm. A smaller value like delay(200) makes a quick flash, while a larger one slows the blink right down.

delay(200);

On and Off Can Differ

The two delays do not have to match. A long on-time and short off-time gives a steady glow with a brief wink between pulses.

delay Stops Everything

Here is the catch: during a delay the board does nothing else. It cannot read a button or sensor, because delay blocks the whole sketch.

Fine for Now

For a simple blink, blocking is fine. Later you will meet millis, a way to time events without freezing the rest of your program.

Tiny vs Big Waits

delay handles milliseconds, but for very short pauses there is delayMicroseconds. You will need it later for precise sensor timing.

Loop Does the Repeating

You never write a repeat command. Because loop() runs again automatically, your on-off-wait pattern repeats forever on its own.

Quick Check

You want the LED to stay on for exactly two seconds.

Recap

You used delay to pace your blink, learned it counts milliseconds, and saw that it blocks everything else. Next you will wire a real LED. 🎉

常见问题解答

「delay() 与闪烁时序」课时是免费的吗？

是的 — 「delay() 与闪烁时序」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Arduino & IoT Academy 课程的其余内容，请升级到 CoddyKit PRO。 Arduino & IoT Academy 课程共包含 4 节课。

「delay() 与闪烁时序」这节课中我会学到什么？

暂停执行以产生可见的闪烁节奏你通过在浏览器中直接运行的动手代码来练习 Arduino & IoT Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Arduino & IoT Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Arduino & IoT Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 3 节课，共 4 节。

「delay() 与闪烁时序」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Arduino & IoT Academy 课中编写并运行代码吗？

能。每节 Arduino & IoT Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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