10PCS/LOT Laser Diodes 5mW 650 nm Diodo RED Dot Laser Diod Circuit 3V/5V 5mW 650nm Module Pointer Sight Copper Head

Unlock precise, compact red-dot projection with this 10PCS/LOT Laser Diodes kit. Each module delivers a steady 650 nm red beam with a micro, single-diode footprint designed for education, DIY projects, and experimental instrumentation. Built for reliable, hands-on demonstrations, these laser diodes come pre-assembled in a compact copper head and brass shell, ready to slot into your next prototype or classroom activity.

What you get and how it works

• 650 nm red laser diode with ≤5 mW light output for visible, safe proper alignment in controlled environments.
• 6 mm copper head housing the emitting die, condenser lens, and adjustable sleeve for precise focus control.
• Brass shell provides sturdy housing and durable thermal management for consistent performance.
• Power options operate from 3V or 5V DC supplies; long line is 75 mm for the 5V lead and a shorter lead for 3V, enabling flexible wiring in various projects.
• Operational range draws less than 40 mA for efficient drive and maintains a long life—listed as over 1,000 hours under typical conditions.
• Pre-assembled with adjustable focal length—the emitting die, condenser lens, and sleeve are integrated yet tunable, letting you dial in the beam to a sharp spot or a broader dot as needed.
• 10-piece quantity gives you multiple modules for parallel experiments, a classroom set, or rapid prototyping without reordering.

Why this kit stands out

• Direct integration with 3V/5V systems means you can drop these into standard microcontroller setups, hobby Power Banks, or bench supplies without extra regulators or adapters.
• Independent copper head assembly minimizes heat buildup at the source, helping maintain stable optical output during extended demonstrations or experiments.
• Versatile use scenarios extend beyond simple pointing—think level/directional indicators, educational demonstrations of laser basics, or as a controllable light source for optical experiments and small-scale projectors.
• Educational value with real-world hardware that shows the relationship between drive voltage, current, and beam focus, perfect for science classes, maker labs, and engineering clubs.

Practical use cases and ideas

• Laser pointer demonstrations during lectures or science fairs, projecting a clear red dot on a whiteboard or screen.
• Electronic level projects: couple the laser head with a rotating mechanism to project a straight reference line on a wall for alignment tasks or decoration layout.
• Miniature projection experiments: remove a condenser to explore how the laser can be modulated or directed through an LCD or optical stage for simple display experiments.
• Laser-based sensing and prop‑type experiments: use the beam as a reference path for simple reflective sensor setups or vibration studies on glass or surfaces.
• Educational demonstrations of laser safety and emission principles, including coherence, directionality, and brightness characteristics in a controlled environment.

Safety and handling

• Always operate in controlled environments and avoid direct exposure to eyes. Use appropriate eye protection when handling laser diodes and ensure the beam is never directed at people or vehicles.
• Ensure secure power connections, observe correct polarity (red typically denotes positive, black negative), and avoid short‑circuits or battery miswiring.
• Follow local regulations and guidelines for laser use in classrooms and workshops.

Specification snapshot (per diode)

• Wavelength: 650 nm (red)
• Output: < 5 mW (continuous
• Forward voltage: 3 V / 5 V selectable
• Forward current: up to 40 mA
• Diameter: 6 mm
• Material: Copper head, Brass shell
• Operating temperature: -36 to 65 °C
• Life expectancy: > 1,000 hours
• Lead length: 75 mm (long line for 5V), short line for 3V
• Included: 10 laser diodes per lot

Transform your next electronics project with a compact, reliable red-dot laser solution. The focal-length adjustability, robust housing, and flexible 3V/5V operation make these diodes a practical choice for both education and hands-on experimenters who crave tangible, laser-based results without complex setups.