i have an old Mp3 player which i need to modify to the following project.
i need to let the MP3 player recieves the signal from a microcontroller circuit in order to chnage the track and the volume ....so on .
so i'll open the cover and remove the buttons and replace it with wire connected to the microcontroller circuit ., so if i need the track number 3 for example , i have to send three pulses...... exactly like when i press the button three times ,
These buttons and keys you are referring belong to a so called microprocessor only. but resident in the mp3 player. I wonder , whether you are not re-inventing the wheel!! Instead you may perhaps add a remote control facility for it, as a project.
Just because the MP3 player works from a 1.5V battery, it doesn't mean the internal electronics work from that voltage. The chances are that there is a boost converter to increase the voltage to something between 3V and 5V to power it.
Just because the MP3 player works from a 1.5V battery, it doesn't mean the internal electronics work from that voltage. The chances are that there is a boost converter to increase the voltage to something between 3V and 5V to power it.
no problem if that happned because i'll supply the Mp3 Player with 1.5 volt in the battery socket too , so if it need to booster it can booster , if not so not a problem.
so the working theory of the mp3 player i'll never touch , i'll just modify the buttons.