650nm Red 5mW Line Laser Module

The LL005MW is a compact red line laser module designed to project a visible straight line onto a surface for alignment, positioning, and sensing applications. At its core is a 650nm red laser diode with an output power of 5mW (Class IIIa), coupled with an integrated line-generating lens that spreads the beam into a wide 120° fan angle. At a working distance of 5cm, this produces a line approximately 15cm long, and the line fades gradually at its edges without a sharp cut-off. The module is pre-wired with red (anode) and black (cathode) leads, and it includes integrated driver circuitry, so no external current-limiting resistor is required—simply connect a DC supply within the 2.8V to 5.2V range.

The module draws a maximum of 25mA, making it suitable for direct connection to microcontroller GPIO pins (with appropriate current consideration) and battery-powered projects. Its 12mm diameter copper housing provides a durable, compact form factor (approximately 12mm diameter and 35mm length for comparable units), and the lens is integrated into the housing for a streamlined profile. With an operating temperature range of -10°C to +40°C, the LL005MW is intended for indoor and sheltered use in 3D scanning, laser alignment, robotics sensing, DIY laser harps, and educational electronics projects.

The LL005MW is a passive optical component in the sense that it does not include a microcontroller, display, or data interface; it simply emits a line when powered. Users should observe laser safety precautions: the module is Class IIIa (5mW) and should not be pointed toward eyes or viewed directly with optical instruments.