Cooling fans...They're everywhere, and they serve the important purpose of keeping things cool, generally electronics. One might rightfully think: "these fans are pretty good at moving air to keep things cool; maybe I can use one of these neat computer fans to keep my widget frosty" followed closely by throwing up one's hands in confusion at the sight of a 3 or even 4-pin connector. OK, power takes two pins but what are these other pins for and how do I use them to convince this fan to keep my things chilly?／冷卻風扇......它們無處不在，它們的重要目的是保持涼爽，通常是電子產品。有人可能會正確地認為：“這些風扇非常擅長移動空氣以保持涼爽；也許我可以使用這些簡潔的電腦風扇中的一個來保持我的小部件結霜”緊隨其後的是看到 3 時困惑地舉起雙手甚至是 4 針連接器。好的，電源需要兩個引腳，但是這些其他引腳是做什麼用的，我如何使用它們來說服這個風扇讓我的東西保持涼爽？
The EMC2101 from Microchip/SMSC is a fan controller with temperature monitoring, and it will take care of all of that for you. Programmable PWM output and tachometer input, with both internal and external temperature sensing, with a 1°C accuracy, it's a perfect friend for any 3 or 4-pin PC fan you may find.／Microchip/SMSC的EMC2101是一款 具有溫度監控功能的風扇控制器，它會為您處理所有這些。可編程 PWM 輸出和轉速計輸入，具有內部和外部溫度感應，精度為 1°C，是您可能找到的任何 3 或 4 針 PC 風扇的完美朋友。
Four pin PC fans have a power and ground pin (those are red and black) and then two more pins. One of those extra pins, the PWM pin, allows you to set the speed of the fan. The last TACH pin is for a tachometer output that allows the EMC2101 to monitor the speed of the fan to make sure it's working as expected. Instead of using a PWM output and counter input on your microcontroller, this chip will take care of that all for you, all over every-day I2C.／四針 PC 風扇有一個電源和接地針（分別是紅色和黑色），然後是另外兩個針。其中一個額外的引腳，PWM 引腳，允許您設置風扇的速度。最後一個 TACH 引腳用於轉速計輸出，允許 EMC2101 監控風扇的速度，以確保它按預期工作。該芯片無需在您的微控制器上使用 PWM 輸出和計數器輸入，而是在日常 I2C 中為您處理所有這些。
In addition to allowing you to control a fan, the EMC2101 includes an internal temperature sensor, as well as connections for an external temperature sensing diode. If you use an external temperature sensor, you can even configure a lookup table (LUT) that allows you to set different fan speeds depending on the temperature, and the EMC2101 will automatically adjust the speed depending on the temperature.／ 除了允許您控制風扇外，EMC2101 還包括一個內部溫度傳感器，以及一個外部溫度傳感二極管的連接。如果您使用外部溫度傳感器，您甚至可以配置一個查找表 (LUT)，允許您根據溫度設置不同的風扇速度，EMC2101 會根據溫度自動調整速度 。
This neat little chip can easily be used to help provide cooling or ventilation to your next project. You might even be able to use it to help quiet down an existing project or hack a noisy piece of electronics that has a loud fan. By allowing you to run a fan at slower speeds when cooling needs are moderate, the EMC2101 can help ease the vibration noise caused by fans running at full speed.／ 這個整潔的小芯片可以很容易地用於為您的下一個項目提供冷卻或通風。您甚至可以使用它來幫助安靜現有項目或破解具有大聲風扇的嘈雜電子設備。通過允許您在冷卻需求適中時以較慢的速度運行風扇，EMC2101 可以幫助緩解由風扇全速運行引起的振動噪音。
Delivered to you on our custom Stemma QT form factor PCB, the Adafruit EMC2101 breakout is ready to help you integrate a fan into your project by making it easy to use with a range of devices. A voltage regulator and 5V tolerant pins allow you to use it with 3.3V or 5V microcontrollers or single-board computers. The included SparkFun qwiic compatible STEMMA QT connectors for the I2C bus allow you to make easy solderless connections to your controlling device, and the standard headers make breadboard prototyping easy. QT Cable is not included, but we have a variety in the shop.／ 通過我們的定制 Stemma QT 外形 PCB 交付給您，Adafruit EMC2101 分線板已準備好通過使其易於與各種設備一起使用來幫助您將風扇集成到您的項目中。穩壓器和 5V 容限引腳允許您將其與 3.3V 或 5V 微控制器或單板計算機一起使用。隨附 的用於 I2C 總線的SparkFun qwiic兼容STEMMA QT連接器使您可以輕鬆地無焊連接到您的控制設備，標準接頭使麵包板原型設計變得容易。 QT 電纜不包括在內，但我們店內有多種。
Our libraries, wiring diagrams, and example code for Arduino, CircuitPython, and Python complete the package. How fan-tastic!／ 我們用於 Arduino、CircuitPython 和 Python 的庫、接線圖和示例代碼完善了該軟件包。多麼狂熱！
