-20% DIY Laser Alarm System STEM Kit

DIY Laser Alarm System STEM Kit

    • S$3.97
    • S$4.96 -20%
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  • Product Code: DIY-LSA-WB

Note: Not suitable for children under 10 years old!

Warning: Laser is used in this project, take proper precautions and avoid direct eye exposure!

Note: Download the softcopy instruction manual (English) here

The DIY (Do It Yourself) Kit for Children Age 10 and above


If you have trouble playing the video above, you may access the video from here.


A laser-based Security System is a type of security and alarm system that uses laser light and a light sensor. In this kit, you will learn how to connect an alarm circuit and allows it to trigger when the laser beam is blocked.

This DIY kit is simple enough to be built by 10 years old children. Let them explore the capability of a laser and a light-dependent resistor (LDR) sensor.

  • Do It Yourself Laser Alarm System
  • Simple and yet educational
  • Suitable for age 10 years old and above
  • Come with everything needed to assemble a laser alarm system
  • No soldering is needed
  • Learn about laser, LDR sensor, and connecting an electronic circuit!
Packing List
  • 2 x AA battery holders
  • 4 x AA batteries
  • 1 x Screw block terminal
  • 1 x Connector with wires
  • 1 x Laser diode
  • 1 x Push block connector
  • 1 x LDR sensor
  • 1 x Variable resistor
  • 1 x Transistor
  • 1 x LED
  • 1 x Buzzer
  • Wooden parts for the laser alarm system
  • Some double-sided tape
  • Some cable tie

Note: Kit does not include a screwdriver

Q & A (1)
Hi. You may refer to Packing List for items included. Thanks:)

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Tags: DIY-LSA-WB, DIY Laser Alarm System STEM Kit