※本產品原廠代理從國外進口，有些交期較長，下訂前請詢問！
Pololu RC Switch with Medium Low-Side MOSFET（PI2803）
中低側 MOSFET 的 RC 開關
This RC switch converts hobby radio control pulses to digital on/off signals and has an integrated medium, low-side MOSFET that allows it to drive moderate loads (up to around 15 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. The board also includes a linear regulator that allows it to be powered with voltages between 2.5 V and 16 V.／此 RC 開關將愛好無線電控制脈沖轉換為數字開/關信號，並具有集成的中低側 MOSFET，使其能夠驅動中等負載（高達 15 A 左右），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。該板還包括一個線性穩壓器，允許它以 2.5V 至 16V 之間的電壓供電。
Overview
The Pololu RC switch with medium 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 moderate 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.
An onboard regulator allows the switch to be powered from voltages between 2.5 V and 16 V. This allows the board to be powered from a 4- or 5-cell NiMH or NiCD battery pack. The battery pack will typically be connected to an RC receiver or servo controller, which passes the power on to the RC switch. The board’s MOSFET can deliver up to 15 A with VCC at 5 V and can handle load supply voltages up to 30 V.／板載穩壓器允許開關由 2.5V 至 16V 之間的電壓供電。這允許該板由 4 或 5 芯 NiMH 或 NiCD 電池組供電。電池組通常會連接到 RC 接收器或伺服控制器，後者將電源傳遞到 RC 開關。該板的 MOSFET 可提供高達 15A 的電流和 5V 的 VCC，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 0.6″ × 0.825″ and weighs just over a gram (0.04 oz) without the included header pins.／這個緊湊型裝置的尺寸為 0.6″ × 0.825″，重量剛好超過一克（0.04 盎司），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 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 medium low-side MOSFET can be found in the user’s guide.
Included Hardware
A 12-pin 0.1″ straight breakaway male header and two 3.5mm 2-pin terminal blocks are included with the Pololu RC switch with medium low-side MOSFET. The header pins can be used to connect the RC switch to perfboards or breadboards. Please note that the included terminal blocks are only rated for 10 A; for higher power applications, use thick wires soldered directly to the board.
