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Pololu RC Switch with Small Low-Side MOSFET（PI2802）小低

具有小型低側 MOSFET 的 RC 開關

　　This RC switch converts hobby radio control pulses to digital on/off signals and has an integrated small, low-side MOSFET that allows it to drive small loads (up to around 3 A), such as lighting or small actuators. The activation threshold and direction are configurable, and a safe-start feature reduces the likelihood of unexpected activation.／此 RC 開關將愛好收音機控制脈沖轉換為數字開/關信號，並具有集成的小型低側 MOSFET，使其能夠驅動小型負載（最高約 3 A），例如照明或小型執行器。激活閾值和方向是可配置的，安全啟動功能可降低意外激活的可能性。

Overview

　　The Pololu RC switch with Small Low-Side MOSFET can be used with standard hobby radio control systems for radio control switch applications or simple interface applications. Example uses include converting extra RC receiver or servo controller outputs to simple high/low signals that can control LEDs or relays and connecting RC systems to microcontroller projects that do not have the necessary resources for decoding the RC interface. Two outputs indicate the presence of a valid signal and whether the switch is on or off, and an integrated low-side MOSFET turns on when the switch is on, allowing the board to drive small loads directly. The switch also features a flyback (or freewheeling) diode across the load outputs so that you can connect a coil to them, such as a motor or relay, without any additional external components.

　　The board requires a 2.5–5.5 V power source supplied to VCC. The board’s MOSFET can deliver up to around 3 A with VCC at 5 V and can handle load supply voltages up to 30 V.／該板需要為 VCC 提供 2.5–5.5 V 電源。該板的 MOSFET 可在 VCC 為 5 V 時提供高達約 3 A 的電流，並可處理高達 30 V 的負載電源電壓。

　　The RC switch measures the width of incoming RC pulses and compares it to a user-configurable threshold (with ±64 µs of hysteresis) to decide whether to turn on the MOSFET. By default, the threshold is approximately 1700 µs, with switch activation occurring above the threshold (longer pulses), but the switch has a learning mode that allows you to change the threshold and the activation direction. A safe-start feature reduces the likelihood of unexpected activation.

　　This compact unit measures 0.4″ × 0.6″ and weighs just over 0.5 g (0.02 oz) without the included header pins.／這個緊湊型裝置的尺寸為 0.4″ × 0.6″，重量略高於 0.5 g (0.02 oz)，不含隨附的排針。

【Outputs and Indicator LED／輸出和 LED 指示燈】

　　The RC switch provides feedback about what state it is in via a yellow indicator LED. Status information is also provided on two output pins:／RC 開關通過黃色 LED 指示燈提供有關其所處狀態的反饋。狀態信息也在兩個輸出引腳上提供：

• The GOOD pin indicates the presence of a valid RC signal (10–330 Hz pulse rate, 0.5–2.5 ms pulse width).／GOOD 引腳指示存在有效的 RC 信號（10–330 Hz 脈衝速率，0.5–2.5 ms 脈衝寬度）。
  
• The OUT pin indicates whether the MOSFET is on.／OUT 引腳指示 MOSFET 是否打開。
  

More information about using the Pololu RC switch with Small Low-Side MOSFET can be found in the user’s guide.／有關將 Pololu RC 開關與小型低側 MOSFET 結合使用的更多信息，請參閱用戶指南。

【Included Hardware】

　　A 12-pin 0.1″ straight breakaway male header is included with the Pololu RC Switch with Small Low-Side MOSFET. The header pins can be used to connect the RC switch to perfboards or breadboards.