The Limit Switch Module is a simple and reliable position-detection component used to detect the presence, movement, or end position of mechanical parts. It converts mechanical motion into an electrical signal and is commonly used as an end-stop or safety switch in CNC machines, 3D printers, robotics, and automation systems. The module provides stable digital output and easy interfacing with microcontrollers.
Core Module Specifications
• Module Type: Mechanical limit switch module
• Switch Type: Momentary microswitch
• Trigger Method: Mechanical contact (lever/roller type variant)
• Output Type: Digital signal
Electrical & Interface
• Operating Voltage: 3.3 V – 5 V
• Output Signal: Digital HIGH / LOW
• Interface Pins: VCC, GND, DO
• Onboard Components: Pull-up resistor, indicator LED (variant dependent)
Performance Characteristics
• Fast and repeatable switching response
• High mechanical durability
• Stable output for control logic
• Suitable for frequent actuation
Physical Characteristics
• Module Type: PCB-mounted switch module
• Actuator: Lever / roller / button (variant dependent)
• Mounting: PCB holes for fixed installation
• Compact and rugged construction
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• Raspberry Pi (GPIO input)
• CNC controllers and motor drivers
Key Advantages
• Simple and reliable position sensing
• Easy digital interfacing
• Long mechanical life
• Widely used standard component
Technical Insights
• Can be wired as normally open or normally closed
• Debouncing may be required in software
• Suitable for low-voltage logic signals only
• Mechanical alignment affects repeatability
Applications
• CNC and 3D printer end-stop detection
• Robotics position sensing
• Safety and limit detection systems
• Industrial automation
• DIY electronics projects
Pro Tip
• Secure mounting improves accuracy
• Use software debouncing for clean signals
• Avoid excessive mechanical force on the lever
• Test polarity before final wiring
Package Includes
• 1 × Limit Switch Module