Laser Module Board HW-493

Laser Module Board HW-493

The HW-493 Laser Module Board is a compact and reliable laser emitter module designed for a wide range of electronics, robotics, and DIY applications. Built around a semiconductor laser diode, the HW-493 laser module board emits a visible red laser beam (typically 650nm wavelength), making it ideal for optical sensing, alignment, and signaling systems.

This module operates at 5V DC, allowing direct compatibility with popular microcontrollers such as Arduino, ESP32, and Raspberry Pi. It includes an onboard driver circuit and current-limiting resistor, ensuring stable performance and protecting the laser diode from overcurrent damage.

The HW-493 features a simple 3-pin interface (VCC, GND, Signal), enabling easy control via digital output pins. The signal pin allows the laser to be turned ON/OFF programmatically, making it suitable for automation and smart systems.

With low power consumption (typically under 40mA) and compact size, this module is perfect for embedded systems and portable projects. It can also be paired with light sensors (LDR, photodiodes) to create optical detection systems such as tripwire alarms or object counters.

⚠️ Safety Note: Even though it is a low-power laser (<5mW), direct exposure to eyes should be avoided.

Features:

• Emits visible red laser beam (~650nm wavelength)

• Operating voltage: 5V DC

• Built-in driver circuit and current-limiting resistor

• Low power consumption (<40mA)

• 3-pin interface (VCC, GND, Signal control)

• Compact and lightweight design

• Easy integration with microcontrollers

• Stable and reliable laser output

• Adjustable focus lens (in some versions)

Specifications:

• Model: HW-493

• Operating Voltage: 5V DC

• Operating Current: ~30–40mA

• Wavelength: ~650nm (red laser)

• Output Power: <5mW (Class IIIA)

• Beam Type: Dot (focus adjustable)

• Interface: 3-pin (VCC, GND, SIG)

• Dimensions: ~20 × 15 mm (PCB)

• Range: Up to ~10–15 meters (visibility dependent)

Applications:

• Laser alignment and positioning systems

• Optical detection and counting systems

• Security alarm (laser tripwire) systems

• Robotics (line tracking and targeting)

• DIY electronics and Arduino projects

• Educational experiments and demonstrations

• Light-based communication systems