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Pololu RC Switch with Digital Output（PI2801）帶數字輸出 RC開關

帶數字輸出的 RC 開關

　　This tiny board converts hobby radio control pulses to digital on/off signals for use in RC switch and simple RC adapter applications. One output indicates the presence of a valid RC signal (10-100 Hz pulse rate, 0.5-2.5 ms pulse width), and the other output indicates whether the pulse width is above or below the 1.6 ms threshold (with ±0.1 ms hysteresis).／此 RC 開關將愛好收音機控制脈沖轉換為數字開/關信號，用於 RC 開關和簡單的 RC 適配器應用。一個輸出指示存在有效 RC 信號，另一個指示開關是否處於活動狀態。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 Digital Output can be used with standard hobby radio control systems for radio control switch applications or simple interface applications. For example, this module can be used to convert unused RC receiver or servo controller channels to simple high/low signals that can control LEDs, MOSFETs, or relays, or it can serve as a simple interface between RC systems and microcontrollers that do not have the necessary resources for decoding hobby RC servo pulses. Two digital outputs indicate the presence of a valid signal and whether the switch is on or off.

　　The board requires a 2.5–5.5 V power source supplied to VCC. The board can be powered by whatever digital system is reading the output, or it can be powered from the RC receiver if you bridge the surface-mount jumper on the bottom of the board that connects VRC to VCC.／該板需要為 VCC 提供 2.5–5.5V 電源。該板可以由讀取輸出的任何數字系統供電，或者如果您橋接連接 VRC 和 VCC 的板底部的表面貼裝跳線，則可以由 RC 接收器供電。

　　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 the output. 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″ × 0.4″ and weighs 0.3 g (0.01 oz) without the included header pins.／這個緊湊型裝置的尺寸為 0.4″ × 0.4″，重量為 0.3 g (0.01 oz)，不含附帶的排針。

【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 is the main output of the board and indicates whether the switch is active.／OUT 引腳是電路板的主要輸出，指示開關是否處於活動狀態。
  

　　Each of the these outputs can source or sink up to 25 mA. More information about using the Pololu RC switch with Digital Output can be found in the user’s guide.／這些輸出中的每一個都可以提供或吸收高達 25 mA 的電流。有關使用帶數字輸出的 Pololu RC 開關的更多信息，請參閱用戶指南。

【Included Hardware】

　　A 7-pin 0.1″ straight breakaway male header is included with the Pololu RC switch with Digital Output. The header pins can be used to connect the RC switch to perfboards or breadboards, or you can solder wires directly to the board for the most compact installation.