Hope this is the correct place for these questions.
Im looking to have a arduino uno control a mp3 mini player with sd card.
Im looking to have this work so when I apply 5-12 volts the the arduino it will play a songor sound byte.
Then when keyed with 12 v again move on to the next song and so on key-next song-key next song.
Then have the option to move to next song or previous song with a button.
The real option I would like is a lock or repeat, so as to 12v key it will play the same song key same song key same song etc.
So key up play song
a button to chose next or previous song
a button to lock a song for continuous play of same song.
Here is an option aI hope can be done also is to add a LCD display to show the name of playing song.
Again all a dream and I'm new to this Arduino but done Electronics for 40 years building satellites and Ballistic missiles launching from Island of Kauai in Hawaii.
This arduino I will have to learn as Im retired but still have a shop and am hot on a project Id like to build using this arduino setup.
You cannot apply more than 5v to any pin of the Arduino (other than the Vin or barrel jack input) without damaging the board.
if the signals must be 12v, you need to use a resistor divider so that the voltage applied to the arduino pin does not exceed 5v.
There are little MP3 player boards (some of which are dirt cheap) that will play MP3's off of an SD card (the arduino itself is not capable of audio output beyond simple beeps with Tone(), nor does it have anywhere near the processing power required to decode MP3), but I don't know if any of those will tell you the name of the song that is playing, you'll have to look them up and examine their documentation.
I do have some of the mini sd mp3 players that work well.
I wanted to set it up with a arduino so I can control the functions and like i mentioned
forward, previous. songs played
Lock on to a song so I can repeat it all the time if I like.
And to add a lcd display if possible so I will know what sound byte .
I do have a circuit working now but not with adruino.
It will key up and play a song and when keyed again will move to next sonk.
Or press toggle switch and it will play the first mp3 song only all the time/repeat. It will only do to the first song on the list, no locking a favorite song..
I can do a 5 volt regulator for volts in as the power to key will be from 8 to 12volts to activate