{"product_id":"10pcs-lot-laser-diodes-5mw-650-nm-diodo-red-dot-laser-diod-circuit-3v-5v-5mw-650nm-module-pointer-sight-copper-head","title":"10PCS\/LOT Laser Diodes 5mW 650 nm Diodo RED Dot Laser Diod Circuit 3V\/5V 5mW 650nm Module Pointer Sight Copper Head","description":"\u003cdiv\u003e\n\u003cp\u003eUnlock 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.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhat you get and how it works\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e650 nm red laser diode\u003c\/strong\u003e with \u003cstrong\u003e≤5 mW\u003c\/strong\u003e light output for visible, safe proper alignment in controlled environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e6 mm copper head\u003c\/strong\u003e housing the emitting die, condenser lens, and adjustable sleeve for precise focus control.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrass shell\u003c\/strong\u003e provides sturdy housing and durable thermal management for consistent performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePower options\u003c\/strong\u003e operate from \u003cstrong\u003e3V or 5V\u003c\/strong\u003e DC supplies; long line is 75 mm for the 5V lead and a shorter lead for 3V, enabling flexible wiring in various projects.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOperational range\u003c\/strong\u003e draws \u003cstrong\u003eless than 40 mA\u003c\/strong\u003e for efficient drive and maintains a long life—listed as over 1,000 hours under typical conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePre-assembled with adjustable focal length\u003c\/strong\u003e—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.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e10-piece quantity\u003c\/strong\u003e gives you multiple modules for parallel experiments, a classroom set, or rapid prototyping without reordering.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this kit stands out\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect integration with 3V\/5V systems\u003c\/strong\u003e means you can drop these into standard microcontroller setups, hobby Power Banks, or bench supplies without extra regulators or adapters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndependent copper head assembly\u003c\/strong\u003e minimizes heat buildup at the source, helping maintain stable optical output during extended demonstrations or experiments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile use scenarios\u003c\/strong\u003e 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.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEducational value\u003c\/strong\u003e with real-world hardware that shows the relationship between drive voltage, current, and beam focus, perfect for science classes, maker labs, and engineering clubs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical use cases and ideas\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eLaser pointer demonstrations during lectures or science fairs, projecting a clear red dot on a whiteboard or screen.\u003c\/li\u003e \u003cli\u003eElectronic 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.\u003c\/li\u003e \u003cli\u003eMiniature 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.\u003c\/li\u003e \u003cli\u003eLaser-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.\u003c\/li\u003e \u003cli\u003eEducational demonstrations of laser safety and emission principles, including coherence, directionality, and brightness characteristics in a controlled environment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSafety and handling\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways 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.\u003c\/li\u003e \u003cli\u003eEnsure secure power connections, observe correct polarity (red typically denotes positive, black negative), and avoid short‑circuits or battery miswiring.\u003c\/li\u003e \u003cli\u003eFollow local regulations and guidelines for laser use in classrooms and workshops.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eSpecification snapshot (per diode)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eWavelength: 650 nm (red)\u003c\/li\u003e \u003cli\u003eOutput: \u0026lt; 5 mW (continuous\u003c\/li\u003e \u003cli\u003eForward voltage: 3 V \/ 5 V selectable\u003c\/li\u003e \u003cli\u003eForward current: up to 40 mA\u003c\/li\u003e \u003cli\u003eDiameter: 6 mm\u003c\/li\u003e \u003cli\u003eMaterial: Copper head, Brass shell\u003c\/li\u003e \u003cli\u003eOperating temperature: -36 to 65 °C\u003c\/li\u003e \u003cli\u003eLife expectancy: \u0026gt; 1,000 hours\u003c\/li\u003e \u003cli\u003eLead length: 75 mm (long line for 5V), short line for 3V\u003c\/li\u003e \u003cli\u003eIncluded: 10 laser diodes per lot\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTransform 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.\u003c\/p\u003e \u003cp\u003e\u003cimg referrerpolicy=\"no-referrer\" src=\"https:\/\/ae01.alicdn.com\/kf\/Sf6982c142cf14294be4e8f5682acb2a2a.jpg?width=1000\u0026amp;height=1000\u0026amp;hash=2000\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg referrerpolicy=\"no-referrer\" src=\"https:\/\/ae01.alicdn.com\/kf\/S77dfe714c3d24ac0800f0f6be5146be74.jpg?width=1000\u0026amp;height=1000\u0026amp;hash=2000\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg referrerpolicy=\"no-referrer\" src=\"https:\/\/ae01.alicdn.com\/kf\/S98fa87153e7c4bb296fa6cf800ea9d0a4.jpg?width=1000\u0026amp;height=1000\u0026amp;hash=2000\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg referrerpolicy=\"no-referrer\" src=\"https:\/\/ae01.alicdn.com\/kf\/S587eceed8baa435ca95fa41dcf96c172o.jpg?width=1000\u0026amp;height=1000\u0026amp;hash=2000\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg referrerpolicy=\"no-referrer\" src=\"https:\/\/ae01.alicdn.com\/kf\/S44cd763c4e864626853dbe4739acb21dt.jpg?width=1000\u0026amp;height=1552\u0026amp;hash=2552\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Electronics","offers":[{"title":"3V","offer_id":56791658987868,"sku":"14:200003699#3V","price":1.96,"currency_code":"GBP","in_stock":true},{"title":"5V","offer_id":56791659020636,"sku":"14:200002130#5V","price":1.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/2042\/0956\/files\/S962ae11775b747bf9ae416bb6dae9353z.webp?v=1771733897","url":"https:\/\/robotbuilder.co\/products\/10pcs-lot-laser-diodes-5mw-650-nm-diodo-red-dot-laser-diod-circuit-3v-5v-5mw-650nm-module-pointer-sight-copper-head","provider":"Electronics","version":"1.0","type":"link"}