Product Name: KX2026 Simple Bullhorn
Product code: KX2026 Simple Bullhorn
Dimensions: Approx. Length 70mm * Width 90mm * Height 95mm
Weight: About 200g
Material: Plastic + Electronic Components
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 is to understand the use of a sound sensor (condenser microphone), and to learn how sound is amplified (amplifier board).

Principle Application: The electret microphone converts human voice signals into electrical signals, which are then transmitted through the capacitor.

The IN terminal of the amplifier board serves as the input signal to the amplifier board, which is amplified after passing through the amplifier board.

Drive the horn (loudspeaker) to produce sound.

Experimental Cognition: Amplifier Board: An amplifier is a device that amplifies the power of an input signal, increasing the current to drive loudspeakers to produce sound.

Knowledge Expansion: Electret Microphone: Also known as a condenser microphone, it is a sensor that can convert vibration signals of sound into electrical signals.

Resistance: It has the function of limiting the current. Here, it provides a direct current working voltage for the microphone, and without resistance, the microphone cannot work.

Changing the size of the resistance can improve the sensitivity of the microphone.

Capacitor: Has the function of energy storage, isolating direct current from alternating current, here used to isolate the direct current of the microphone.

Translate the Chinese sentence "将咪头产生的声音信号传递到功放板。" into English: "Transmit the sound signal generated by the microphone to the amplifier board."

Knowledge Extension: Amplifier Board: An amplifier is a device that amplifies the power of an input signal, increasing the current to drive speakers to produce sound. LM386 is an integrated audio power amplification IC. It is commonly used in toys and telephones.

It only has a power output of 1W, while the typical public address systems on the market have 5W, so the sound is quite soft.

There are four needle-like pins on the board, which are used for connecting wires. Two of them are the same GND, which are connected to the ground of the power supply.

VCC as the power supply connection, which is the red wire of the battery box (the positive power supply), and IN as the

Sound Signal Input Terminal. The potentiometer on the board can adjust the size of the input signal, and if the signal is too large, the output will be...

The sound might be distorted, try adjusting it.

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.