Product Name: KX2028 Infrared Laser Beam Alarm
Product Code: KX2028 Infrared Laser Beam Alarm
Size: Approx. 90mm x 75mm x 80mm
Weight: About 55g
Material: Plastic
Color: Mixed
Is the device powered by batteries: Yes
Packing: 500 pcs
Box Specification: 600*450*550mm

Preface:

In today's society, where children's education is increasingly valued, scientific enlightenment education has gradually become an important topic in the field of education, which is pursued and explored. More and more teachers and parents are beginning to pay attention to cultivating children's scientific literacy from an early age, so that children can develop good personalities and behavioral habits from the beginning. Parent-child interactive crafts can improve the quality of parent-child companionship, improve the relationship between parents and children, and we spend time with our children, without mobile phones, iPads, or televisions, only joy, interaction, and communication. It can cultivate the ability of children to solve problems by themselves. When children encounter problems, they should first see and experience the solution themselves, because parents and teachers solve problems in the process of doing crafts. It can develop children's imagination. In children's world, cars can fly in the sky, and the sun can be green. Playing with DIY crafts can cultivate children's practical ability by using different tools, which fully exercises children's little hands. Brushes, paints, scissors, hot-melt guns, glue"Children are brave to try any tools and to some extent, they are developing different skills. Improving children's self-confidence in the process of handcrafts, we try everything possible together, experience many failures, but we always succeed, which to some extent enhances their self-confidence. Cultivating children's concentration when children explore various tools and handcrafts, they are very focused, and if there is no external disturbance, they can continue to explore.

The purpose of the experiment: To enable children to learn more about scientific knowledge and their own ability to practice by means of game entertainment.

Principle of Application: A laser alarm uses a laser to illuminate a photoresistor, which causes a change in resistance. This change is amplified by a transistor, triggering a buzzer to sound an alarm. When the laser is blocked by an object, the photoresistor's resistance increases, allowing current to flow through a 502 potentiometer and the base of the transistor, causing the transistor to conduct. This causes the buzzer to sound and the LED to light up to indicate an alarm!

Experimental Cognition: Its features include a long detection range, low false alarm rate, the ability to implement continuous and cross-layered defense, and no interference between defenses.

Knowledge Expansion: Laser Perimeter Alarm System is a branch of anti-theft alarm systems. The main purpose of the laser perimeter alarm system is to prevent unauthorized persons from illegally trespassing into the designated security area without permission, thereby avoiding various potential threats to life and property. It effectively protects the perimeter area and provides timely alarms for trespassing behaviors. In the past, the application scope of laser perimeter alarm systems was relatively small, mainly in some key places. However, with the continuous update and development of technology, laser perimeter alarm systems are also continuously applied in other industries, such as residential communities, banks, factories, etc. Therefore, the laser perimeter alarm system is continuously expanding every year.

Knowledge Extension: A 502 potentiometer can be used in circuits to adjust the brightness of electric bulbs. Students can study more about it, but be careful!

Safety Warning:

All the accessories in this product are specially designed for student experiments. Please use them under the supervision of teachers and parents to ensure safety! Do not consume any of the products! They are not suitable for children under three years of age. Do not approach fire sources. Before assembling any batteries, please check if the circuit is clear, all parts of the circuit are complete, and all contacts are good. The + on the battery is the positive pole, and - is the negative pole. Be careful during the assembly process, and if glue is used, do not get it in your eyes or on your skin.