Assuming that I do not know whether this thread goes in the 'Power Electronics' section or in this one, I ask the moderators to move it to the right section (in case this one is wrong).
I recently bought this MP3 Module Amplifier (or this one if you cannot open the previous link) to be able to play with a speaker the tracks inserted in a micro SD card. What I want to do is 'copy it', or rather, create it myself.
There are 3 main steps:
1) Choose the components
2) Draw the schematic
3) Draw the PCB
I would like to go through some of these steps with you because it is the first time I am doing something like this and I am not sure where to start. Obviously if I need help with, for example, the third point I will open a thread in "PCB layout", but for now I would say: let's talk about the first point "Choose the components".
I think a class AB or class D amplifier is sufficient for this purpose, for example the 8002 (I think it is the same one used in the module I bought).
On the Digi-Key website I looked for an amplifier filtering only the output I want, which is (if I am not mistaken) 2W 8Ohm because the speaker I have is 2W 8 ohm. Is this correct? Any advice? I power the entire module with a small 5V power bank.
When choosing the amplifier I have to take into account that it will have to receive the songs on the sd card as input... so maybe I need an opamp with SPI or I2S? (like TAS5760LD but less performing)
I recently bought this MP3 Module Amplifier (or this one if you cannot open the previous link) to be able to play with a speaker the tracks inserted in a micro SD card. What I want to do is 'copy it', or rather, create it myself.
There are 3 main steps:
1) Choose the components
2) Draw the schematic
3) Draw the PCB
I would like to go through some of these steps with you because it is the first time I am doing something like this and I am not sure where to start. Obviously if I need help with, for example, the third point I will open a thread in "PCB layout", but for now I would say: let's talk about the first point "Choose the components".
I think a class AB or class D amplifier is sufficient for this purpose, for example the 8002 (I think it is the same one used in the module I bought).
On the Digi-Key website I looked for an amplifier filtering only the output I want, which is (if I am not mistaken) 2W 8Ohm because the speaker I have is 2W 8 ohm. Is this correct? Any advice? I power the entire module with a small 5V power bank.
When choosing the amplifier I have to take into account that it will have to receive the songs on the sd card as input... so maybe I need an opamp with SPI or I2S? (like TAS5760LD but less performing)