Development Boards

These DFPlayer Mini modules are a compact and inexpensive MP3 player that can be directly connected to a speaker. It features integrated hardware to decode MP3, WAV, and WMA files. The software supports MicroSD/TF cards in either FAT16 or FAT32 formats. Using simple serial commands, the player can play back audio without the need for complex audio decoding and management from the host platform. Technical Specifications: Supports sampling rates (Khz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48 24-bit DAC output, support range: 90dB, SNR support: 85dB Fully supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes NOR FLASH A variety of control modes are available. IO control, serial port, AD button control mode Radio spots language function, you can pause the background music being played. Advertising finished playing background sound continues to play back The audio data is sorted by folder, supports up to 100 folders, folders can be assigned to every 255 Tracks 30 level adjustable volume, six adjustable EQ Due to different batches, these may arrive with either Black or Red PCB's. Application: Automated Assistants Arduino Powered Robots Cosplay Props and Costumes (Proton Packs, Phasers, Daleks, Cybermen etc...) Car navigation voice broadcast Road transport inspectors, toll stations voice prompts Train, bus safety inspection voice prompts Electricity, communications, financial operating room voice prompts Vehicles into and out of the channel to verify the voice prompts Frontier channel voice prompts Multi-channel voice alarm or voice guidance equipment operation Electric sightseeing bus safety with voice announcement Electrical and mechanical equipment failure alarm Fire alarm voice prompts Automatic broadcast equipment, regular broadcast Pinout: Pin number Pin name Function Remark 1 VCC Module power input 3. 3V—5V, 5V is recommended, do not exceed 5. 2V 2 RX UART serial data input   3 TX UART serial data output   4 DAC_R Audio output right channel Drive headphones, amplifier 5 DAC_L Audio output left channel Drive headphones, amplifier 6 SPK2 Connect small speaker Drive less than 3W speakers 7 GND Ground Power ground 8 SPK1 Connect small speaker Drive less than 3W speakers 9 IO1 Trigger port Default previous song (long press volume down) 10 GND Ground Power ground 11 IO2 Trigger port Default next song (long press volume plus) 12 ADKEY1 AD port 1 The first song when triggered (long press cycle first song) 13 ADKEY2 AD port 2 Fifth track when triggered (long press cycle fifth track) 14 USB+ USB+ DP Connect U disk or USB port of computer 15 USB- USB- DM Connect U disk or USB port of computer 16 Busy Playback status With audio, output low. No audio, output high