5V 650nm 5mW Red Dot Laser Module - ProSpec Grade Copper Diode for Arduino & Security

Specifications:

• Laser Color: Red
  
• Wavelength: 650nm (Deep Red)
  
• Output Power: 5mW (Class IIIa)
  
• Operating Voltage: 5V DC
  
• Operating Current: < 40mA
  
• Beam Shape: Dot (Point)
  
• Casing: Industrial Copper (Heat-Sync)
  
• Dimensions: 6.5mm x 18mm
  
• Lifespan: >10,000 Hours

Key Applications

• Security Tripwires: Long-range perimeter sensing.
  
• Laser Harps: Optical musical instrument triggers.
  
• Alignment Tools: Precision drilling or cutting references.
  
• Optical Data Links: Basic signal transmission via photodiode.

Project Evolution

• Past Projects (Prerequisites): If you've used standard IR LEDs for proximity, you've likely struggled with ambient light interference.
  
• Feature Upgrade: This 5V Laser provides a high-intensity, localized light source that is vastly easier to filter and detect over long distances compared to diffuse LEDs.
  
• Effort/Requirements: Beginner-Friendly. Requires only two wire connections.

Virtual Technician & Wiring

• ⚠️ EYE SAFETY: Never look directly into the beam.
  
• Red Wire: Connect to 5V DC.
  
• Blue/Black Wire: Connect to GND.
  
• Note: For long-term use, ensure the copper casing has slight airflow to maximize the life of the diode.

Package Included:

1 x 5V 650nm 5mW Red Dot Laser Module - ProSpec Grade Copper Diode for Arduino & Security

Frequently Asked Questions (FAQ)

1. How far can the laser beam reach?
   In low light, the dot is clearly visible up to 15-20 meters. Indoors, it can easily reach 10 meters with high clarity.
2. Can I power this directly from an Arduino 5V pin?
   Yes. The current draw is less than 40mA, which is well within the safety limits of an Arduino's 5V rail.
3. Is the focus adjustable?
   This specific module comes with a pre-set fixed focus for a sharp dot.
4. Can I use 3.3V to power this laser?
   Yes, but the beam will be significantly dimmer and might not be suitable for sensor applications.
5. Is this laser visible in daylight?
   The dot is visible on surfaces in daylight, but the "beam" itself is only visible in smoke or foggy conditions.
6. Will this laser burn through paper or tape?
   No. This is a 5mW low-power laser for sensing and pointing; it does not generate enough heat to burn materials.
7. How do I mount this module?
   The 6.5mm diameter copper casing fits perfectly into standard 6.5mm or 7mm mounting brackets or 3D-printed holders.
8. Can I pulse the laser for data transmission?
   Yes, it can be switched at high frequencies using a transistor for optical data links.
9. What is the lifespan of this laser diode?
   With proper 5V power and cooling, the diode is rated for over 10,000 hours of operation.
10. Why is my laser flickering?
    Check your power supply. Flickering usually indicates an unstable voltage or a loose solder connection on the lead wires.
11. Is the casing conductive?
    Yes, the copper casing is usually connected to the internal circuit. Ensure it doesn't touch other metal components in your project.
12. Can I use a 9V battery?
    Only if you use a 7805 voltage regulator. Connecting 9V directly will burn out the diode instantly.
13. Is it safe for kids' projects?
    Only under adult supervision. Users must be taught never to point lasers at eyes.
14. What receiver should I use for a laser tripwire?
    A standard LDR (Light Dependent Resistor) or a Photodiode works best with this 650nm wavelength.
15. Does the module get hot during use?
    The copper casing will feel warm during continuous use, which is normal as it dissipates heat from the diode.
16. Can I use this for a DIY laser engraver?
    No. Engraving requires lasers with 500mW to 5000mW+ power. This is only 5mW.
17. What is the wavelength of this red laser?
    It is 650nm, which is the standard wavelength for deep-red visible lasers.
18. Can I cut the wires to make them shorter?
    Yes, the wires can be cut and re-soldered as needed for your enclosure.
19. Does it come with a lens?
    Yes, a small plastic collimating lens is pre-installed inside the copper housing to create the dot.
20. Is this 5mW laser legal in India?
    Yes, 5mW (Class IIIa) lasers are generally legal for educational and hobbyist use in India.