Laser Module HW-493 – 650nm Red Dot Laser with Adjustable Focus
🔴 Laser Module HW-493 – 650nm Red Dot Laser with Adjustable Focus
The HW-493 Laser Module is a compact and low-power 650nm red laser emitter ideal for Arduino projects, robotics, DIY laser pointers, alignment systems, and security sensors. This module features an onboard resistor and operates directly from 5V, making it plug-and-play with microcontrollers.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HW-493 |
| Wavelength | 650 nm (red laser) |
| Operating Voltage | 5V DC |
| Operating Current | < 40 mA |
| Output Power | < 5 mW (Class IIIA laser) |
| Lens | Adjustable focus |
| Beam Shape | Dot |
| Dimensions | ~6 × 15 mm (laser barrel) |
| Module Size | ~20 × 15 mm PCB |
| Connector | 3-pin: VCC, GND, Signal (enable control) |
📌 Pinout
| Pin | Function |
|---|---|
| VCC | +5V power |
| GND | Ground |
| EN/S | Signal pin (connect to HIGH to enable laser) |
Can be controlled by Arduino or ESP32 GPIO to turn laser ON/OFF.
🛠️ Applications
Line or dot laser guidance systems
Security tripwires and motion detection
DIY laser pointer
Object alignment and positioning
Laser communication and signaling
🧪 Sample Arduino Code
int laserPin = 7; void setup() { pinMode(laserPin, OUTPUT); } void loop() { digitalWrite(laserPin, HIGH); // Turn laser ON delay(1000); digitalWrite(laserPin, LOW); // Turn laser OFF delay(1000); }