5V Laser Head Sensor Module KY-006

5V Laser Head Sensor Module KY-008

Components
DET558
Part.No: KY-008
€1.75
Last items in stock
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KY-008 5V Laser Head Sensor Module — 650 nm red laser transmitter on a compact 15×24 mm PCB. Plug-and-play with Arduino via 3-pin header, ideal for line-of-sight sensing and DIY projects.

 

The KY-008 is a compact 650 nm red laser transmitter module designed for Arduino and compatible platforms. Operating at 5V with a simple 3-pin interface (Signal / VCC / GND), it lets you switch a focused red laser beam ON or OFF directly from a microcontroller GPIO pin — no external driver required. Its tiny 15×24 mm footprint and plug-and-play design make it a favourite in sensor kits, robotics builds, and DIY security systems.

Key Features

  • 650 nm Red Laser: Visible red wavelength → easy alignment and testing without extra tools
  • 5V Operation: Directly compatible with Arduino UNO/Nano/Mega 5V logic — no level shifting needed
  • Digital Control: Drive the S (Signal) pin HIGH/LOW from any GPIO → simple on/off laser switching
  • Low Current Draw (≤ 40 mA): Powered safely from the Arduino 5V rail without an external supply
  • Compact PCB (15×24 mm, 2.2 g): Fits tight enclosures and breadboard setups with ease
  • Standard 2.54 mm Header Pins: Snap into a breadboard or DuPont cable — zero soldering required

Pinout & Wiring

PinLabelDescription
1SSignal — digital HIGH turns laser ON, LOW turns it OFF
2VCC (+)Power supply — connect to +5V
3GND (–)Ground — connect to GND

Wiring note: Connect GND to Arduino GND, VCC to Arduino 5V, and S to any digital output pin. Use digitalWrite(pin, HIGH) to fire the laser and LOW to turn it off. The on-board current-limiting resistor protects the laser diode — no additional resistor is required.

Compatibility

  • Arduino UNO / Nano / Mega: Native 5V — connect VCC to 5V pin, S to any digital pin. Full brightness guaranteed.
  • ESP32 / ESP8266 / Raspberry Pi Pico (3.3V): Module operates at 3.3V as well; beam may appear slightly dimmer. For full brightness, power VCC from the board's 5V/VIN pin while driving S from a 3.3V GPIO.

Typical Applications

  • Laser tripwire / intruder detection: Pair with a KY-008 receiver module to detect beam interruption across a doorway or corridor
  • Line-of-sight distance & alignment testing: Quickly verify sensor placement in robotics and automation rigs
  • DIY laser show / light effects: Combine with mirrors and a servo for simple scanning patterns
  • Educational projects: Introduce students to digital output control, optics, and sensor interfacing
  • Object detection in conveyor systems: Detect when a part breaks the beam on a small-scale production line

Technical Specifications

ParameterValue
InterfaceDigital (Signal pin — HIGH/LOW)
Operating Voltage5V
Operating Current≤ 40 mA
Light Source Wavelength650 nm (red)
Dimensions15 × 24 mm
Weight2.2 g
MPNKY-008

Frequently Asked Questions

Q: Do I need a resistor or driver circuit to use the KY-008?
A: No. The module includes an on-board current-limiting resistor, so you can connect it directly to an Arduino 5V pin and a digital GPIO without any additional components.

Q: Can I use the KY-008 with an ESP32 or Raspberry Pi (3.3V)?
A: Yes. Power VCC from the board's 5V/VIN rail for full brightness and drive the S pin from a 3.3V GPIO. The module will also operate at 3.3V on both VCC and S, though the beam may be slightly dimmer.

Package Contents: 1 × KY-008 Laser Head Sensor Module

⚠ Safety Warning: The KY-008 emits a visible red laser beam. Never point it directly at eyes or aim it at reflective surfaces toward people. Intended for use in controlled DIY/educational environments by responsible users.
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