Analog to 8bit r2r DAC

Using Arduino Programming Questions
1

I want to make an bluetooth speaker project and i want to convert 10bit ADC input to 8bit DAC, is that even posible?

2

divide by 4?

3

Anything can be done. But in case this is going to be about something like an Arduino Uno/Nano acting as an audio DSP - don't go there. It's not going to give any appreciable sound quality.

4

I want to switch between aux 1/4 jack and bluetooth and output analog signal, and them make another stages with analog effects and amplifiers

5

I'd start by drawing a block diagram of your proposed system and then decide on the technology requirements for each block.

6

I understand every block necessary for now, but i dont know how to output A0 input to D0-7 for R2R DAC stage

7

PORTD=analogRead(A0)/4;

8

Are your R2R resistors better than 0.5% precision? If not, you won't be getting 8 bit precision from the DAC.

9

If you use an Arduino Nano, for example, but only for control and in combination with analog multiplexers, you will be able to choose the sound source. For more complex control I would recommend an audio processor like TDA7439 or PT2314E. As a power amplifier I would recommend TPA3116D2 - there are both modules and finished products with it.

TDA7439
https://www.st.com/resource/en/datasheet/cd00004906.pdf
PT2314E

TPA3116D2

10

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