Pololu RC Switch with Digital Output

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.

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.

Specifications:

• Max current on a single I/O: 25 mA
• Minimum logic voltage: 2.5 V
• Maximum logic voltage: 5.5 V

Documents:

• User's Guide
• Schematic