10-Pack Red Dot Laser Diode Module 650nm 5mW 3V/5V Copper Head
10-Pack Red Dot Laser Diode Module 650nm 5mW 3V/5V Copper Head
10-Pack Adjustable Red Dot Laser Diode Modules — 650nm | 5mW | Brass Copper Head
Get precision red dot projection in a compact, adjustable brass-body module. This set of 10 x 650nm red laser diode modules is ideal for electronics hobbyists, makers, educators, and DIY engineers who need reliable, low-voltage laser emitters for their projects. Each unit features an adjustable focus sleeve, built-in condenser lens, and a durable 6mm copper (brass) head — ready to connect and use straight out of the box.
Made in Mainland China.
Key Specifications
- Laser Wavelength: 650nm (Red)
- Output Power: <5mW
- Supply Voltage: 3V (short lead) / 5V DC (long lead)
- Operating Current: <40mA
- Copper Head Outer Diameter: 6mm
- Shell Material: Brass
- Power Lead Length: 75mm
- Operating Temperature: -36°C to 65°C
- Working Life: 1,000+ hours
- Spot Mode: Dot facula, continuous output
- Wiring: Red wire = Positive (+), Black wire = Negative (−)
What's Included
- 10 × Adjustable Red Dot Laser Diode Modules (pre-assembled, glued, and focus-adjusted)
Popular DIY Applications
- Electronic Pointer Pen: Perfect for presentations and classroom use — project a clear red dot onto screens or surfaces.
- Spirit Level / Alignment Tool: Mount on a motor-driven head and project a horizontal reference line for decoration, picture hanging, or levelling tasks.
- Miniature LCD Projector: Remove the condenser and pair with an LCD screen to project images onto a wall.
- Laser Alarm System: Use with light-sensitive resistors to create perimeter protection zones for ponds, gardens, or enclosures.
- Wireless Laser Communication: Pair a transmitter and receiver for short-range optical data transfer experiments.
- Laser Toys & Prototypes: Excellent for hobby robotics, optical sensor testing, and laser dot toy builds.
Design Notes
Each module arrives fully assembled — emitter diode, condenser lens, and adjustable brass sleeve are pre-fitted and secured with strong adhesive. Simply connect to a 3V or 5V DC power source (using the short or long lead respectively) and the module is immediately operational. The 6mm outer diameter makes it compatible with most standard laser module mounting brackets and housings.
⚠️ Safety Notice: Never aim laser beams at eyes or direct them toward people or animals. Keep away from children. Handle with care to avoid short circuits — do not allow bare leads to contact metal surfaces unintentionally.
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Frequently Asked Questions
Q: What voltage do these red laser diode modules operate at?
A: Each module supports both 3V and 5V DC. The short wire lead connects at 3V and the long wire lead at 5V, giving you flexibility for different circuit designs and microcontroller projects.
Q: Are the modules pre-assembled and ready to use?
A: Yes. Each of the 10 laser diode modules comes fully pre-assembled — the emitter diode, condenser lens, and adjustable copper sleeve are already fitted, aligned, and secured with adhesive. Just connect power (red = positive, black = negative) and they're ready to operate.
Q: What is the beam wavelength and power output of these modules?
A: These modules emit a 650nm red laser dot at under 5mW output power. They produce a continuous dot (facula) beam suitable for pointing, alignment, and a wide range of DIY electronic applications.
Q: Can I adjust the focus on these laser modules?
A: Yes. Each module features an adjustable sleeve that allows you to fine-tune the focal length of the condenser lens for sharper or broader dot projection depending on your project's requirements.