Product Name: KX2025 Simple Radio Telegraph Machine
Article number: KX2025 Simple Radio Telegraph Machine
Dimensions: Approximately (Length 100mm * Width 75mm * Height 15mm) * 2
Weight: About 80g
Material: Plastic
Color: Randomly matched with organic materials
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.

Objective of the experiment: To understand radio signals, recognize light-emitting diodes and buzzers, and use touch buttons lightly.

Principle of Application: After pressing the button on the launch board, a fixed frequency radio signal is continuously emitted outward through the antenna. When the receiving antenna receives the radio signal, it is identified to drive the buzzer to beep and the LED to light up. Here, the use of beeping and the brightness of the LED to simulate Morse code for communication. There is only one frequency, and it cannot be used for bidirectional communication. The distance is 3-8 meters, and it is only used as an experimental toy.

Experimental Cognition: Wireless Transmitting and Receiving Board: After pressing the touch button, it continuously transmits a fixed frequency of radio waves (27MHz) through the antenna, and the receiving board can only receive.

Fixed-frequency radio waves (27MHz), so it cannot be used in two sets simultaneously and cannot be applied in close proximity.

Knowledge Expansion: Light-emitting Diodes: Semiconductor light-emitting elements. The long leg is the anode, and the short leg is the cathode. If the polarity is reversed or more than 3V is supplied, it will be damaged. Buzzer: An electrical sound-producing element. A powered buzzer has an oscillation circuit inside. The long leg is the anode, and it will continue to buzz when an external 3V power supply is added. Toggle Button: It has a spring piece inside. When pressed, the two pins on the same side close and conduct, and when released, they break.

Knowledge Extension: When testing light-emitting diodes (LEDs) with Renfu batteries, it is necessary to add a resistor to limit the current, or the LEDs may be damaged. Always remember not to reverse the positive and negative poles of electrical appliances or expose them to excessive voltage during use, as this can lead to danger.

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.