MP3 Player for Sounds:

 MP3 Player for Sounds.

Details available here, DFPlayer Mini MP3, downloadable manual.

This particular MP3 player was selected based on the following, minimum connections to activate the player, economical and readily available from a variety of outlets, Micro SD/TF card, conventional and easily sourced MP3 sound files, 8 ohm speaker and up to a 3W amplifier.   

Connection diagram, 5V & GND supply, speaker connections, and means or methods to operate.

Strip board PCB layout, 5V power supply, power supply input either from a DC or DCC source.

Three push buttons or three connections for activation via three Reed Switches.

Alternatively a combination of push button and Reed Switches for activation.

Alternative Strip board PCB for use for activation with the Function Outputs from a Multifunction Decoder or from a  Accessory Decoder.