Laser Transmitter Module
A KY-008 laser transmitter module emits a small red laser dot when its signal input is enabled.
Part images
What it is
A KY-008 laser transmitter module emits a small red laser dot when its signal input is enabled.
How students use it
Students use it for beam-break experiments, aiming targets, line-of-sight demos, and light-sensor projects.
Pins and power
S signal input, middle VCC, and -/GND on many KY-008 boards. Verify the printed labels.
Typical KY-008 laser modules are low-current digital output modules. Verify board label voltage before connecting to Pico.
Treat the signal pin like an LED-style output control, but follow laser safety rules every time.
Voltage and safety
Use a Pico-safe control signal and confirm the module supply expected by the specific board.
Never point the laser at eyes, faces, animals, mirrors, shiny objects, or traffic. Keep it aimed at a matte surface.
Module internals
Main component: Laser diode module.
Laser diode, current-limiting/control components, small PCB, and three-pin header.
Datasheet notes
This is an educational low-power laser module, not a precision distance sensor.
Common libraries
Use machine.Pin for simple on/off control.
Common mistakes
Aiming at reflective surfaces, leaving it powered while unattended, using the wrong pin order, and assuming all three-pin laser boards share the same layout.