Lesson 29 Laser Transmitter


Laser is widely used in medical treatment, military, and other fields due to its good directivity and energy concentration. The Laser Transmitter module, as the name suggests, is a one that can emit laser.



  • 1 * SunFounder Uno board

  • 1 * USB data cable

  • 1 * Laser transmitter module

  • 1 * 2-Pin anti-reverse cable


A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. Lasers differ from other sources of light because they emit light coherently.

Spatial coherence allows a laser to be focused to a tight spot, enabling applications like laser cutting and lithography, and a laser beam to stay narrow over long distances (collimation), enabling applications such as laser pointer. Lasers can also have high temporal coherence which allows them to have a very narrow spectrum, i.e., they only emit light of a single color. And its temporal coherence can be used to produce pulses of light—as short as a femtosecond.


Experimental Procedures

Step 1: Build the circuit


Step 2: Open the code file

Step 3: Select correct Board and Port

Step 4: Upload the sketch to the SunFounder Uno board


Now, you can see the Laser Transmitter module send out Morse signals.



DO NOT look directly at the laser head. It can cause great harm to your eyes.