Extending the LEGO MindStorms RCX

LEGO Sensors

Rotation Sensor

• LEGO Rotation Sensor Details
• LEGO Rotation Sensor Internals and Fix

Custom Hardware

Custom Multiplexer Creation Prep

• Cutting Electric Plates

Motor/Output Multiplexers

• TFM’s Home Page – See the “My LEGO Workshop (MindStorms)” link for the following:
  • Motor/Light Block (direct link to web subframe)
    • Create 2 motor ports from 1, but with one engaged when Forward and the other when in Reverse
  • Motor/Sensor Expander: 6 motor ports (direct link to web subframe)

Sensor/Input Adapters & Multiplexers

• RCX Digital Input Adapter
• Four-Way Touch Sensor Multiplexer
• Schematic for a Four-Way Touch Sensor Multiplexor
• TFM’s Home Page – See the “My LEGO Workshop (MindStorms)” link for the following:
  • Resistor Switch Pad: 4 switch sensors on 1 sensor input (direct link to web subframe)

Custom Input & Output Devices

Power Boosters

• RCX Motor Power Booster Schematic with RCX Variable-Speed Control
  • Link to the schematic embedded in the above that is hosted on Brick Shelf

Limit Switches

• Techno-Stuff Limit Switch: Stop a motor without using a sensor port
  • Limit Switch Theory and Application
  • Building a Limit Switch
  • Adapter Using Lego Switch Sensors

Custom Sensor Design

• Designing Low-Cost Sensors Compatible with LEGO MindStorms Robotics Invention System
• Making Your Own RCX Sensors, Part I
• Making Your Own RCX Sensors, Part II

Multiple Sensor Types

• Danny’s Mindstorms Page
• LEGO sensor page
• Michael Gasperi’s LEGO Mindstorms Sensor Input Page
• Sensors

  Individual Sensors

• Philo: Lego MindStorms Compatible Sensor Devices
  • Infra-Red Lamp
  • Rotation Sensor
  • Improving Infra-Red Sensitivity of the Lego Light Sensor
  • GP2D12 Distance Sensor
  • Color Sensor
  • Wire Guidance Sensor
  • Temperature Sensor
  • Laser Target Finder Sensor
• Homebrew Lego Sensors
  • Temperature Sensor
  • Light Sensor
  • Bend Sensor
• TFM’s Home Page – See the “My LEGO Workshop (MindStorms)” link for the following:
  • Temperature Sensor (direct link to web subframe)
• Proximity Sensor
• Line Tracking Sensor From Sven Horstmann

Third-Party Vendors

This GitHub organization is not associated with any of these vendors in any way; links are provided as a reference. Note that the vendors might no longer be offering RCX-compatible components.

• HiTechnic Products
• Techno-Stuff: Sensors for Lego NXT, RCX, and VEX Robots
  • Sensors
  • Controls
• MindSensors
• LePoMux (LEGO Port-Multiplexer)
• JCX: Java Control System