Escape Room prop feasibility

Projects General Guidance
1

The setup is simple: two specific items are placed on separate metal sensors, and a recorded message plays. Will it work to have the triggers wired, an sd card reader with the message, and then a 3.5mm breakout board so I can run a cord to a plugged in sound bar to play the message? I have been trying to find a tutorial and nothing addresses my specific desired project outcome.

2

What turns the audio file on the SD card into audio? Need some kind of processor there.

3

Yeah, this is doable, and I have done it in the past. You need an audio shield though. THen just put the recording as an mp3 on the SD card and trigger the playback when your sensor is activated.

ps (to the mods) the noobi handicap is really annoying for someone trying to be helpful. 5 min between posts completely kills forum functionality as a communication tool. Why would I help someone if it applies a time limit to when I can respond to someone helping me?

4

Sorry about the waiting, the forum gets overrun with spam otherwise, we can't keep up with deleting & blocking it.

5

CrossRoads:
...the forum gets overrun with spam otherwise, we can't keep up with deleting & blocking it.

+1
A big thank you to all moderators. The forum would be unusable without spam protection.
I think this has to be stepped up a notch by blocking code that is posted without code tags.

@Dlang. That waiting time will disappear when you behave.
Leo..

6

Dlang:
Yeah, this is doable, and I have done it in the past. You need an audio shield though. THen just put the recording as an mp3 on the SD card and trigger the playback when your sensor is activated.

Do you have a recommendation for the shield and maybe the sketch you used?

7

CrossRoads:
What turns the audio file on the SD card into audio? Need some kind of processor there.

Isn't that what the Arduino does? So the sketch would understand that once the sensors are activated, to play the file on the sd card and output it through the 3.5mm breakout board, which is connected to the sound bar (ala mp3 player hooked to external speaker) (?)...

8

No, the Arduino does not have the processing power to decode an MP3 file in real time. Basically you have another player controlled by the Arduino, which pushes the play 'button'.

Is Google not finding it for you today?