KY-008 5V Laser Dot Diode
by Generic
SKU: PSA-CMP-LASER-KY008
No reviews yetTypical India street price
₹25–₹60
Red laser pointer module for tripwires and optics labs.
Interface: Digital (on/off)
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Concept
A laser diode + resistor on a tiny PCB.
A little theory
Coherent 650 nm. Class 3R-ish cheap modules — treat as eye-hazard. In the classroom, treat KY-008 5V Laser Dot Diode as a beginner part using Digital (on/off). Typical India street price is about ₹25–₹60. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
digitalWrite to S pin; GND/5V. Pair with LDR or phototransistor.
Classroom & project use
- Tripwire
- Light-show
- Refraction demo
Buying in India
Precautions
- Eye safety
- Don’t drive without resistor if using raw diodes
Specifications
| Wavelength | ~650nm |
| V | 5V |
| Category | LEDs & Indicators |
| Difficulty | Beginner |
| Voltage | 5V |
| Interface | Digital (on/off) |
Pinout
See module silkscreen: typically VCC, GND, and signal pins. Confirm labels against the seller photo — clones vary.
