The 3V Red Laser Diode Module is a compact, precision optical device designed to project a single red dot for aiming, targeting, alignment, and pointing applications. Housed in a 6mm copper cylindrical barrel, this module is widely used in laser sights, pointers, alignment tools, and DIY electronics projects. It produces a bright, visible red dot that makes it easy to aim, mark reference points, or indicate positions with precision.
At the heart of the module is a red laser diode operating at a wavelength of approximately 650nm, which produces a bright, visible red beam. The laser passes through a collimating lens that focuses the beam into a small, concentrated dot at a distance. The dot projection is ideal for applications requiring single-point aiming or alignment, such as laser sights, targeting systems, and pointing devices.
The module features a 6mm copper housing that provides excellent durability and superior heat dissipation compared to aluminum housings. Copper’s high thermal conductivity helps keep the laser diode cool during extended operation, ensuring stable output and long lifespan. The compact form factor allows easy integration into handheld tools, mounting brackets, and custom enclosures.
The module operates from a 3V DC supply, making it compatible with 2×AA or 2×AAA battery configurations (3V nominal) and other low-voltage power sources. A built-in driver circuit regulates the current to the laser diode, ensuring stable output and protecting the diode from current spikes. The low voltage requirement makes this module particularly suitable for battery-powered handheld devices, portable pointers, and compact DIY projects where space and power are limited.
The red dot pattern is visible in indoor environments and low-light conditions, with an effective range of several meters depending on ambient lighting. The 3V operation provides adequate brightness for most aiming and alignment tasks while consuming less power than 5V modules.
The module is widely used in laser sights, laser pointers, alignment tools, targeting systems, barcode scanners, medical devices, industrial measurement equipment, and DIY electronics projects. It is also popular in educational projects for teaching optics, laser principles, and aiming techniques.
Important Safety Note: This is a Class 3R laser product. Do not stare directly into the laser beam or point it at people, animals, or reflective surfaces. Use appropriate laser safety glasses when operating the module. Keep out of reach of children. The module should be mounted securely and operated only by individuals who understand laser safety precautions.
Whether you are building a battery-powered laser sight, a compact pointer, or a custom targeting system, the 3V Red Laser Diode Module provides a reliable, affordable solution with the added benefit of a copper housing for superior heat management. It is suitable for individual makers, students, and businesses purchasing in bulk for product development or industrial applications.
Features
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Red dot laser pattern — Projects a single concentrated dot for aiming and alignment
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650nm wavelength — Visible red beam for clear indication
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6mm copper housing — Superior heat dissipation compared to aluminum
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Built-in driver circuit — Regulates current for stable output and long lifespan
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3V DC operation — Compatible with 2×AA/AAA battery configurations and low-voltage sources
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Compact form factor — Fits into handheld tools, brackets, and custom enclosures
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Durable construction — Copper housing for effective thermal management
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Wide application range — Laser sights, pointers, alignment tools, targeting systems
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Visible dot pattern — Effective range of several meters in low-light conditions
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Cost-effective — Affordable solution for battery-powered aiming and pointing
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Module Type | Red dot laser diode module |
| 2 | Output Power | 5mW (typical) |
| 3 | Wavelength | 650nm (red) |
| 4 | Operating Voltage | 3V DC |
| 5 | Housing Diameter | 6mm |
| 6 | Housing Material | Copper |
| 7 | Laser Class | Class 3R |
| 8 | Pattern | Single dot |
