电力都消耗在哪里
测量电流并找出耗电大户
电力都消耗在哪里 是 CoddyKit 上的免费 Arduino & IoT Academy 课时。 这是第 1 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。
The Battery Budget
A battery holds a fixed amount of energy. To run for months, you must understand exactly where every drop of power goes. 🔋
Measured in Milliamps
Power draw is measured as current in milliamps (mA). A board pulling 80mA from a 2000mAh battery drains it in just about a day.
Capacity vs Draw
Battery life is simply capacity divided by current. Cut the current ten times and your device runs ten times longer.
The Usual Power Hogs
The biggest drains are usually the WiFi radio, bright LEDs, and the regulator. Knowing the worst offenders tells you where to save.
WiFi Is Hungry
An active WiFi radio can spike to over 150mA. It is by far the heaviest cost in most battery IoT projects, so use it sparingly.
Measure, Do Not Guess
You cannot save power you cannot see. A multimeter in series with the supply shows the real current your device is pulling.
Reading Average Current
Current jumps around as the chip works. What matters for battery life is the average current over a full cycle, not the peak.
Onboard LEDs Add Up
That little power LED glowing on your board can sip several milliamps nonstop. On a tiny budget, even small constant draws matter.
The Regulator Tax
The voltage regulator wastes a steady current just being on. Cheap dev boards often leak more here than the chip itself uses.
Sleep Is the Big Win
An idle chip still burns real current. Putting it into sleep between tasks is the single most powerful way to extend battery life.
Estimate Before You Build
Add up each part's current, then divide your battery's capacity by that total. This quick estimate reveals if your goal is realistic.
long hours = 2000 / 80; // mAh / mA = approx runtimeQuick Check
Time to test what drives battery life.
Recap: Find the Drains
Battery life is capacity divided by current. Measure the real draw, hunt down WiFi, LEDs, and regulator waste, then lean on sleep. ⚡
常见问题解答
「电力都消耗在哪里」课时是免费的吗？
是的 — 「电力都消耗在哪里」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。
「电力都消耗在哪里」这节课中我会学到什么？
测量电流并找出耗电大户 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 1 节课，共 4 节。
「电力都消耗在哪里」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。