Monday Kids FM Wireless Microphone Kit (Electronic Production Kit)

This product is an FM Wireless Microphone Kit designed for electronic enthusiasts and students to learn and practice electronics skills. The kit includes all necessary electronic components and circuit board, allowing users to assemble and solder a complete FM wireless microphone. It is ideal for students for electronic skills training and for electronic enthusiasts for DIY projects.

Product Parameters:

Model: WK-56-34
Operating Voltage: DC 1.5V (1 AA battery)
Frequency Range: 87~108MHz
Effective Distance: Approximately 20 meters
 

Function Explanation: An FM wireless microphone and a device with FM reception capabilities (such as a tape recorder or FM radio) can achieve wireless transmission within a certain range. This allows for singing karaoke at home while moving around or assisting teachers in large classrooms. This wireless microphone circuit is reasonably designed, aesthetically pleasing, with a transmission range of up to 20-30 meters, long service life, cost-effective, and low power consumption. It is very suitable for young people to learn and assemble.

Circuit Principle: The circuit mainly consists of an electret microphone and a high-frequency transistor 9018. The transistor VT1, along with peripheral components C4, C4, C5, etc., forms a high-frequency oscillation circuit. The electret microphone BM converts sound signals into electrical signals, which are coupled to the base of VT1 through capacitor C1. This modulates the high-frequency oscillation voltage. The modulated high-frequency signal is transmitted through C6 via the antenna. R3 and R4 are the DC bias resistors for VT1, forming a DC negative feedback circuit to stabilize VT1's operating point. The oscillation frequency is determined by LMC5, calculated as f=1/2π. L is the printed coil on the circuit board, and C5, with different capacitances, can change the oscillation frequency. The circuit oscillates at approximately 100MHz, and R1 supplies power to the electret microphone.

Product Features:

Educational Value: Suitable for students to conduct electronic skills training, helping them grasp basic knowledge of electronic components and soldering techniques.
DIY Project: Perfect for electronic enthusiasts to carry out DIY projects, enhancing hands-on skills and innovative thinking.
High-Quality Components: Uses high-quality electronic components to ensure circuit stability and reliability.
Detailed Manual: Comes with a detailed assembly and soldering manual to help users complete the project smoothly.
Practical Function: The finished FM wireless microphone can be used for practical applications such as home karaoke and teacher lectures.
 

Combination of Education and Entertainment: Students can learn electronic knowledge through hands-on creation, increasing their interest in learning.
Easy Assembly: Detailed manual and high-quality components make the assembly process simple and easy to understand.
 

Usage Instructions:

Preparation: Gather soldering tools (soldering iron, solder wire, etc.) and power supply.
Assemble Circuit: Follow the manual to solder the electronic components onto the circuit board.
Connect Power: Connect the circuit board to a 1.5V DC power supply.
Test Function: Test the FM wireless microphone's functionality by inputting a signal to ensure it works properly.
 

Circuit Diagram: A detailed circuit diagram is provided with the kit. Users can follow the circuit diagram to assemble and solder, ensuring the accuracy of the circuit.

Purchase Information:

Applicable Range: The kit is suitable for students' electronic skills training and electronic enthusiasts' DIY projects.