Compare PFx Brick Models

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Lights, sound, and motor control via IR and/or Bluetooth
All the capability of the PFx Brick without Bluetooth
Light Fx only. Easily add advanced lighting to your models at low cost.
Power Sources

USB

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Power Functions

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9V

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Remote Control

USB

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InfraRed (IR)

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Bluetooth BLE 4.2

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Features

PFx App Desktop

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PFx App Mobile

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Firmware Upgrades

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Independent Light Channels

8 + 2

8 + 2

8

Sound Fx

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Motor Channels

8

8

Colour

Two-tone Gray

Dark Gray

Light Gray

Useful for…
Ideal controller for advanced Technic models, LEGO® Trains, or those special models which could come alive with light and sound! Imagine what the PFx Brick could do to your spaceship, castle, aircraft, robot, etc.!
Ideal replacement for LEGO® V2 IR receiver. Two powerful motor channels plus light and sound Fx. Also great for models which use motors, lights and sound but don't need remote control via Bluetooth.
Add advanced light Fx to a model with the convenience of brick mounting. Ideal for models which already have a motor controller and just need additional lighting or simply for models which just require special lighting Fx.

Mechanical

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Electrical

Power Sources
  • Power Functions™ battery boxes (AAA and rechargeable)
  • 9V Power Regulator (with Power Functions™ extension cable)
  • USB
  • others (with adapter cables)
Power Connector
LEGO® Power Functions™ compatible female (underside) connector
Power Source Selection
Automatic between Power Functions™ Input and USB +5V
Input Voltage Range
+5 ~ +12 VDC
Input Voltage Protection
Over-voltage, reverse polarity, transient surges

InfraRed (IR) Sensor

IR Connector
3-pin 2 mm pitch female pin header
IR Sensor Options
  • Direct connection with 1x2 transparent brick shroud
  • Remotely tethered with extension cable

Bluetooth Control

Bluetooth version
Bluetooth 4.2 Low Energy
Radio Range
up to 100 m depending on propagation conditions

Power Functions™ Motor Outputs

Output Channels
2x
Output Connector
LEGO® Power Functions™ compatible male (top-side) connector
Output Voltage
+4.7 ~ +11.7 V (Input Voltage -0.3 V) Pulse Width Modulated (PWM)
Output Current
up to 3 A per channel (dependent on power source)
Output Protection
Over voltage, over current, over temperature
Output PWM Frequency
15 kHz (nominal)
100 Hz (low torque compensation mode)
1.15 kHz (LEGO® Power Functions™ compatibility mode)
Output PWM Resolution
up to 255 speed levels
Motor Speed Curves
User-defined Spline curve fit between Vmin, Vmid, and Vmax
where Vmin, Vmid, and Vmax specify minimum, mid-point, and maximum motor speed values respectively
Momentum Simulation
Independently adjustable acceleration and deceleration for each output channel

Lighting Fx

Output Channels
up to 10x total
8x (on Lighting Dock Connector)
2x (using Power Functions™ outputs)
Output Connector
10-pin Lighting Dock connector (2 mm pitch female pin header)
Pin 1 & 10 : +5V
Pin 2-9 : Light output channels 1-8
Output Current
up to 100 mA per channel
Output Brightness
Continuously variable control per channel
Individual Single Light Fx
  • On / Off (with optional rules based on motor direction)
  • Brightness/dimming
  • 50% duty cycle flasher
  • Strobe flasher
  • MARS/Gyralite
  • Random flicker
  • Random blinking
  • Sci-Fi engine glow
  • Photon torpedo
  • Laser pulse
  • Broken light
  • Lighthouse
  • Status indicator
  • Sound modulated intensity
  • Motor speed modulated intensity
Combination Light Fx
  • Linear sweep
  • Bargraph sweep
  • Knight-Rider style scanner
  • Twinsonic-style emergency flashers
  • Whelen-style emergency flashers
  • Times square
  • Noise
  • Twinkling stars
  • Traffic lights
  • Sound bar
  • Alternating flashers
  • Lava lamp
  • Laser cannon

Sound Fx

Speaker Output
up to 2 W into any 4 Ω or 8 Ω speaker
Speaker Connector
2-pin 2 mm pitch female pin header
Audio DSP
24-bit digital filters and EQ adjust
Automatic Dynamic Range Control (DRC)
Automatic sample rate conversion
Polyphonic mixing
Audio File Format
Mono-channel WAV files
22.050 or 11.025 kHz sample rate
8 or 16 bit audio samples
Audio File Capacity
250 files up to memory capacity
Total Playback Time
(mm : ss)

Format

4 MB

8 MB

16 MB

11.025 kHz / 8-bit

06 : 20

12 : 40

25 : 20

11.025 kHz / 16-bit
22.050 kHz / 8-bit

03 : 10

06 : 20

12 : 40

22.050 kHz / 16-bit

01 : 35

03 : 10

06 : 20

Audio EQ
Bass adjust -20 dB ~ + 20 dB
Treble adjust -20 dB ~ + 20 dB
User Sound Fx
  • Play once
  • Play specified number of times
  • Play for specified duration (loopback if required)
  • Volume control
  • Playback with motor modulated volume
  • Playback with gated intervals
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