DollaTek Voice Sound Playback Module Arduino MP3 Player Module UART I/O Trigger Class D Amplifier Board 5W 8M Storage SD/TF Card

Recognised by Win 10 PC as a USB drive by simply plugging into the Micro USB port. Comes pre-configured with 9 small MP3 files each one contains the voice of someone speaking the file number in Mandarin, simply replace these files with your own renamed ones and you are in business. The most important information relates to the 3 mode switches which change the way the playback mode is triggered, I have attached this missing information here for you. I could not find their own web site for help. It is possible to interface to Arduino as well, simple coding, again you need to search for that information. A very good value device for adding sounds, voice or alerts to your home projects. Does not come with data sheet, header pins or a USB cable, or a speaker but that keeps the cost down. UPDATE: Couple of extra points: These boards are very dependent on a good supply voltage - lower supply to 4.2V it will still function but only at lower volumes, so you will need a buck converter supply to run from a 3.7V LiPo cell. Another issue is that in stand-alone mode, triggering inputs with a solid ground (which remains grounded) produces constant repeat playback of the relevant sound file over and over. Only by removing the ground (or power) will stop the playback, these boards are not single-shot playback so it may be necessary to employ schmitt trigger circuits if you need to prevent this or use the Arduino UART mode. None of the three program switch positions have any affect on constant repeat playback, which is a shame for my application.

The media could not be loaded. Bought this for a plasma gun prop from the Fallout series I'm making. It took me a while to figure out that you need to power it from the header pins and not USB as it wont do anything if the USB data pins are connected. It will kind of work powering it from USB but you need to pull the cable out slightly so the data pins disconnect. Overall a good little board and perfect for adding sound effects to my prop.