I need a device to which I can record a voice message and then when it receives the power ( 220vac or other) it recalls the recorded signal. I really don't know the name of the device that can perform this function, so please answer me.
This is cheap, easy to take a part, pretty straight forward to reuse.
SAW 3 DIGITAL VOICE RECORDER | AllElectronics.com
For $2.00 (plus shipping), it's a good deal. You get 30 seconds of recording, 3 AAA batteries, small case with built in battery holder, microphone, and mini speaker (not piezo). The ugly little troll is held on by two screws. White paint and made in China, probably not a good toy for the dog, or small children. Loud enough holding it in your hand, but not so much across the room. Needs amplified and larger speaker.
Thanks, but I'm afraid I can't use it as I want the playback to be PLC controlled not by pressing the switch and the speaker to be an external one