Pololu RC Switch with 3A Low-Side MOSFET




$7.95 ea.
$7.95 ea.
$6.36 ea.

Looking for a small, simple, RC on/off switch? This Pololu unit can dump 3A signaled from a simple R/C PWM signal!

Description [Hide]

This tiny board from Pololu takes a standard RC PWM signal and does a simple on/off toggle of a low-side mosfet that connects/disconnects your load's ground line. It's smart too, with diagnostic and data lines & LED that check for the presence of a valid RC signal (10-100 Hz pulse rate, 0.5-2.5 ms pulse width), and what state it is presently in. When the PWM signal goes above 1.6mS, it turns on. That simple!


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.

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.

Pololu RC Switch with Small Low-Side MOSFET, typical wiring diagram.

Outputs and indicator LED

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:

  • The GOOD pin indicates the presence of a valid RC signal (10–330 Hz pulse rate, 0.5–2.5 ms pulse width).
  • The OUT pin indicates whether the MOSFET is on.

More information about using the Pololu RC switch with Small Low-Side MOSFET can be found in the user’s guide.

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.

Pololu RC Switch with Small Low-Side MOSFET with included hardware.
Pololu RC Switch with Small Low-Side MOSFET on a breadboard.


Documentation [Hide]

Related Products [Hide]


Maxim 8212 Voltage Monitor

This very configurable voltage monitor chip offers more flexibility than the 1381 series of detectors, at more complexity of setup.

$3.75 USD


FTDI Basic Breakout (5V)

This is a basic breakout board for the FTDI FT232RL USB to serial IC. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 5V Arduino boards.

$14.95 USD


TMP36 Temperature Sensor

This is a tidy analog temperature sensor with a functional range of -40C to +125C

$3.20 USD


Arduino Pro Mini 328 - 5V/16MHz

You need to wedge an Arduino into a really tiny spot? Simple - just use a SMD '328 IC. Oh... you want a reset, and voltage regulator too? Why didn't you say so!

$9.95 USD


Female-to-Female 100mm jumper wires

Ideal for making pin-to-pin connections. These are the products you need. Waaay better than soldering tiny sockets to wires and heat-shrinking them yourself!

$4.95 USD


1N914 Silicon Diode

Standard 1N914 Silicon Diode for general purpose circuit design.

$0.10 USD


DPDT Micro Top-mount Slide Switch

This micro DPDT switch has the switch lever on the top.

$0.50 USD


10k Resistor

5% accuracy 1/4 watt resistors to get you started with your BEAM experiments.

$0.20 USD


Male-to-Male 100mm jumper wires

Why use cut telephone wires when you can use these great male-to-male 100mm jumper wires from Sparkfun?

$4.95 USD


Male Strip Pins - 20 per

Sometimes...you just need pins. Lots of pins. Not sure how long, but lots. So here's a strip of 20 that's a convenient size to 'snik' apart to whatever length you need!

$1.30 USD





Remember Me

Forgot Your Password?

Don't Have an Account?
Sign Up!