The Laser Module Board (HW-493) is a compact, reliable, and low-power laser emitter module widely used in electronics, robotics, and DIY projects. It generates a red laser beam that is highly visible, making it ideal for optical experiments, positioning, alignment, and security systems. The module operates at 5V DC, allowing direct compatibility with Arduino, ESP32, Raspberry Pi, STM32, and other microcontroller platforms without requiring extra power circuitry.
Its small size and plug-and-play design make it easy to integrate into projects that require precise light pointing or optical detection. The HW-493 module includes a laser diode, a driver circuit for stable operation, and a protective resistor, ensuring longer lifespan and consistent output.
How It Works
The HW-493 laser module contains a semiconductor laser diode that emits a red laser beam (typically at 650 nm wavelength). When connected to a 5V DC power source, the internal driver regulates current to the diode, preventing overcurrent damage. The laser beam can be detected by light sensors, photodiodes, or camera systems, enabling applications like object detection, counting systems, or line tracking in robotics.
This module is often used in combination with LDRs, photodiodes, or laser receivers to form complete detection systems.
Key Features
Compact HW-493 laser module for DIY and embedded systems
Operating voltage: 5V DC
Prebuilt driver circuit for safe and stable operation
Emits red laser light (650 nm wavelength)
Low power consumption and long working life
Simple 3-pin interface (VCC, GND, Signal)
Easy integration with Arduino, ESP32, and Raspberry Pi
Ideal for learning, prototyping, and robotics applications
Specifications
| Parameter | Value |
|---|---|
| Model | HW-493 |
| Operating Voltage | 5V DC |
| Operating Current | ~40 mA |
| Wavelength | ~650 nm (red laser) |
| Output Power | < 5 mW (Class IIIA) – |
| Beam Range | Up to ~15 meters |
| Dimensions | ~15 mm × 10 mm × 8 mm |
| Interface | 3-pin (VCC, GND, SIG) |
Pin Configuration
| Pin | Name | Description |
|---|---|---|
| 1 | VCC | +5V DC Power Supply |
| 2 | GND | Ground Reference |
| 3 | SIG | Control/Input (Enable pin) |
Applications
DIY electronics and hobby projects
Object detection and counting systems
Laser-based security alarms
Robotics (line tracking and alignment)
Optical experiments in education
Positioning and targeting systems
Interactive light displays
