Im new to your forum and it looks like their is a lot of experience on here, so here goes and I hope you can help me.
Im looking for some one to help me design a circuit for a doorbell to play a 20-30 second MP3 file of my choosing which would be stored on a cheap memory card, say like an MMC or a flash rom which could be connected to a PC USB.
This would also need to have some kind of amplification and audio player.
It has been about 20 years since I last dabbled in electronics and all the help in the world would be appreciated.
There are single chip solutions to this such as the ISD2532P etc. Instead of USB, you can connect the IC to your sound cards output and record the MP3 file as you play it on the computer. You'll lose a little fidelity, but it'll be plenty good enough for a doorbell chime.
Here is a typical application circuit:
I know your requested feature can be done by a single chip solution and the unit cost for that chip is around USD 3.0. No amplifier is require and the MP3 songs can play directly from SD card...........
There are single chip solutions to this such as the ISD2532P etc. Instead of USB, you can connect the IC to your sound cards output and record the MP3 file as you play it on the computer. You'll lose a little fidelity, but it'll be plenty good enough for a doorbell chime.
Here is a typical application circuit:
I know your requested feature can be done by a single chip solution and the unit cost for that chip is around USD 3.0. No amplifier is require and the MP3 songs can play directly from SD card...........
what is the best way to design this MP3 doorbell? I want to design something that will play off of an sd card, so the circuit would need to entail an SD card reader and then output the sound to the external speaker. Help would be much appreciated.
Hi Everyone .. Even I am interested in building an mp3 doorbell which directly connects to a computer via USB to download the songs. Looking for a cheap solution with readymade ICs. Can anyone help me ?
Hi guys,
I have been looking at the posts and I am aware that there is a singal chip solution to the design of the mp3 doorbell. However, I am not very clear of, how to record the mp3 songs onto the chip (ISD2532) without using a mic.
Hi guys,
I have been looking at the posts and I am aware that there is a singal chip solution to the design of the mp3 doorbell. However, I am not very clear of, how to record the mp3 songs onto the chip (ISD2532) without using a mic.
Yes that is the circuit I used. And the only difference between that circuit and the 2532 circuit, that I noticed, was that with the 2560 you need to tie pin 8 to ground.
I did manage to finally get it to record using the microphone. I had missed one connection on my breadboard. Sound from speaker is very faint so I guess I must incorporate an amplifier. Also will try the line input version next to record an mp3 sound from the computer.
hi guys
i need advice on this ISD2532/40/60, is there an alternative ic that could be used. unfortunately i cant seem to find one in south africa...
my project is a listening device alll the components were available for capturing the sound amplifying, filtering and hearing it on the headphones, but i need to record it and be able to play it back.
10 seconds is ok, it's not long enough to warrant a SD or MMC card and MP3 codec and a good size you can do with a micro and a eeprom.
If you work with microcontrollers and don't mind building and programming a complex device there is some stuff here that you can use to record/encode/playback sound;
(algorithms to encode 8bit sound to 1bit) Roman Black's BTc 1bit Sound Encoding Algorithms