5V Laser Head Diode 6mm Point
5V Laser Head Diode 6mm Point
5V Laser Head Diode 6mm Point
5V Laser Head Diode 6mm Point
5V Laser Head Diode 6mm Point
5V Laser Head Diode 6mm Point

5V Laser Head Diode 6mm Point

Diodes
OPT450
Part.No: 0416
€1.25
In Stock
Immediate Dispatch
Red 650nm laser dot diode head, 5mW output, 3–3.5V operating voltage, Ø6×13.5mm cylindrical form factor with 70–80mm lead wires. Ideal for Arduino and ESP32 projects requiring a compact point laser source.

 

The 5V Laser Head Diode – 6mm Point is a compact red laser dot emitter operating at 650nm wavelength with 5mW output power and a 3–3.5V working voltage. Its cylindrical Ø6×13.5mm housing makes it one of the smallest plug-and-play laser heads available for maker and prototyping projects. With pre-attached lead wires (70–80mm), it connects directly to a microcontroller circuit or driver without soldering on the laser element itself.

Key Features

  • 650nm Red Wavelength: Visible red dot laser — ideal for alignment, sensing, and interactive projects → clearly visible beam in typical indoor conditions
  • 5mW Output Power: Low-power Class IIIa laser → safe for hobbyist use with appropriate precautions
  • 3–3.5V Operating Voltage: Works directly with a simple resistor or driver circuit from a 3.3V or 5V supply → compatible with common microcontroller setups
  • Compact Ø6×13.5mm Body: Cylindrical metal housing fits standard 6mm laser holders → easy to mount in enclosures or custom frames
  • Pre-wired Leads (70–80mm): Red (+) and black/blue (−) wires already attached → no soldering to the laser element required
  • Dot Laser Shape: Focused point beam (not line or cross) → precise targeting for sensing and positioning applications

Pinout & Wiring

WireSymbolDescription
Red wireVCC (+)Positive supply — connect to 3–3.5V (use series resistor from 5V)
Black / Blue wireGND (−)Negative / Ground

Wiring note: This is a bare 2-wire diode head — it is always-on when powered. To power from a 5V Arduino supply, add a series resistor (e.g. 33–47Ω) to limit voltage to the 3–3.5V operating range. For on/off control, use a transistor or MOSFET switching circuit driven by a GPIO pin.

Compatibility

  • Arduino UNO / Nano (5V): Use a series resistor or transistor driver to step down from 5V to the 3–3.5V working voltage of the laser diode.
  • ESP32 / Raspberry Pi (3.3V): A 3.3V rail is close to the operating voltage — still recommended to verify current limiting to stay within safe operating limits.
  • Standalone circuits: Works with any regulated 3–3.5V supply and appropriate current limiting.

Typical Applications

  • Laser tripwire / security systems: Pair with a laser receiver module to detect beam interruption — classic maker alarm project
  • Distance & alignment tools: Use the dot beam for optical alignment jigs or DIY rangefinder experiments
  • Line-following & object detection: Combine with a photodiode or LDR for simple reflective sensing
  • Escape room props & interactive installations: Low-cost, compact laser source for creative builds
  • Educational electronics projects: Demonstrates basic laser diode operation, driver circuits, and optical sensing for students and hobbyists

Technical Specifications

ParameterValue
Interface2-wire direct (always-on, no signal pin)
Operating Voltage3–3.5V DC
Output Power5mW
Wavelength650nm (Red)
Laser ShapeDot (Point)
ColourRed
DimensionsØ6 × 13.5mm
Cable Length70–80mm
MPN—

FAQ

Q: Can I connect this laser directly to an Arduino 5V pin?
A: Not directly — the diode operates at 3–3.5V. Add a series resistor (33–47Ω) or use a transistor/MOSFET driver circuit to protect the diode from over-voltage.

Q: What is the difference between this bare laser head and a KY-008 module?
A: The KY-008 is a PCB-mounted breakout with a built-in resistor and a signal pin for direct GPIO control. This bare laser head has only two wires and requires an external limiting resistor — it is always-on when powered.

Package Contents: 1× 650nm 6mm Red Laser Dot Diode Head with pre-attached lead wires.

⚠ Laser Safety Warning: This is a 5mW Class IIIa laser. Never point the beam directly at eyes. Avoid reflective surfaces that could redirect the beam. Keep away from children. Use appropriate laser safety precautions during operation.
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