Halloween is a coming and i am working on updating some animatronics. They run on cassette tapes at the moment and the boars are marked '87 so thought id update them.
I wish to run an arduino with either a SMD card on it with the audio files on there, and output the audio files. The audio files will just be voice and the audio signal will go into the arduino which then out puts 5 volt signals to some transistors to gate to switch the 24V to the pneumatic relays to activate.
Should i use the wave shield to accomplish this? or a simpler way you think? Possibly split the audio to the speakers and to the arduino input. using voltage references to trigger output to the transistor switches.
Any help would be great