TheWireless Microphone FM Transmitter DIY Kitis an engaging and entertaining project for electronics enthusiasts and DIY lovers. This kit allows you to build a fully functional FM transmitter that can broadcast your voice or other audio signals over a wireless frequency. Perfect for hobbyists and educational purposes, this kit provides a hands-on experience in electronics assembly and radio technology.

Note:The default kit is shipped as separate components, and you will need to assemble it yourself. For this kit, you may require the following tools:

• Soldering iron
• Multimeter
• Solder wire
• Soldering iron stand
• Diagonal pliers
• Screwdriver
• Tweezers
• Needle-nose pliers
• Desoldering pump
• Cleaning sponge
• Screwdriver set

Key Features

Transmission Frequency:The device operates at a minimum frequency of70 MHz, covering all university campus broadcasts in China, FM broadcasts, and Japanese broadcasts, etc. The default shipping frequency is around70 MHz. Adjust the L1 inductor to change the transmission frequency. After assembling and powering on the device, you can receive signals using a regular radio after a slight adjustment.

Specifications

• Brand:EQKIT
• Model:RF-01
• Operating Voltage:1.5V (2 AAA batteries) or DC 3-6V
• Operating Current:5mA (3V) 10mA (6V)
• Frequency Range:70 MHz 110 MHz (default minimum frequency)
• Transmission Distance:5-30 meters (inflated by assembly quality and environmental factors)
• Antenna Length:200mm soft wire included
• Sensitivity:Receivable within 1 meter of speaking distance
• Battery Box:Yes, with a black shell included
• PCB Dimensions:49mm x 13mm
• Overall Dimensions:55mm x 35mm x 15mm
• Assembly Instructions:Electronic version (including circuit diagram); please request from customer service after purchase
• Kit Weight:18 grams

Important Notes:

Due to the simplicity of this circuit, the transmission frequency can be significantly affected by the environment. Touching or getting close to the circuit board, antenna, or housing may cause the transmission frequency to change. This kit is recommended for educational use rather than industrial or commercial applications. For a more stable FM transmitter kit, please click the provided link.

Debugging Instructions:

After soldering, carefully check the PCB for any soldering issues, such as cold joints and short circuits. Finally, insert two AAA batteries that you purchase separately. Press the red switch to turn on; the transmitter will then operate normally. If you are using a standard 88-108 MHz radio, it is recommended to separate the L1 inductor by about2 mm. Refer to the assembly guide’s images for further instructions on adjusting the inductor.

Complete Kit Includes:

• All components (Package 1 includes battery box)

DIY Essential Reads:

Electronic assembly requires a basic understanding of electronics and manual skills. Since each person’s skills and techniques vary, we cannot guarantee that everyone will succeed with the DIY process, but we promise 100% after-sales service and will do our utmost to assist you in completing the assembly. Therefore, if the finished product does not meet the described performance, please do not rush to leave feedbackremember to contact our after-sales service. Thank you for your cooperation!