87.5MHz–108MHz Dual-Channel FM Radio with Digital Display – DIY Electronics Kit with Type-C Port Suitable for Audio Learning Etc

Product Features:1. RDA5807M module has high sensitivity and effectively shields noise to ensure clear sound quality2. Real time display of frequency/volume, intuitive operation and full of technological sense at night3. Support simultaneous charging and usage, automatically switching between lithium battery and Type C power supply4. Built in 3.3V buck boost module, stable power supply, strong compatibility5. The angle can be freely adjusted to accurately capture signals and avoid intermittent sound reception in weak fieldsProduct Description:The main control chip uses the STC15W408AS microcontroller; The FM radio module uses RDA5807M, with a frequency range of 87.5-108MHz, covering almost all global frequency bands. It has the advantages of high sensitivity, low noise, and strong anti-interference ability; The amplifier part uses the anti distortion digital amplifier chip AXS2031 (instead of TDA2822), which has the characteristics of simple circuit, high output power, and the ability to maintain distortion even at voltages as low as 2.5V; The voltage stabilization part uses a 3.3V boost/buck module, which can maintain 3.3V for normal power supply and display of the microcontroller and digital display when the power supply voltage is 2.5-5.5V. Instead of the AM11117 voltage regulator chip, the microcontroller cannot function properly when the voltage is below 3V, and the digital display cannot function properlyProduct Parameters:Supply voltage: 2.5-5.5VPower supply mode: Type C5V and 3.7V lithium batteries (18650 flat head battery)Radio band: FM frequency bandFrequency range: 87.5MHz-108MHzOutput power: 5W+5W dual channelNote: Both power supply methods can be used simultaneouslyUniversal antenna: adjustable in any direction for optimal reception effectAudio output interface: can be connected to headphones, or can be connected to a power amplifier with a 3.5 audio cableType C power interface: When using Type C power supply, it can charge the battery at the same time. After the battery is fully charged, it will automatically cut off chargingVolume increase and decrease: Short press once to increase or decrease the volume by one levelFrequency addition and frequency subtraction: Long press to automatically search for channels, short press to change frequency by 0.1MHzBlue light digital tube: real-time display of volume level or received frequencyProduct List:Radio kit * 1