Smallest USB DAC With Amplifier!

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Introduction: Smallest USB DAC With Amplifier!

About: I love making something about electronics, making something awesome and cool that I've never make before!

Hi guys! Welcome back!

Today, I'll share my creation and how to build it!

This is the Smallest DAC with Amplifier! Not powerful enough but it's enough for light weight portable use!

This is costs not much, just only ~$3, but don't expect Hi-Fi audio on this project!

If you want high bitrate audio, use high end USB Soundcard or DAC.

Enough intro, let's start make it!

Step 1: Schematic and Materials!

Before start making this project, you need to prepare these kind of materials :

  1. USB Sound card (only $1 or you can buy high quality one)
  2. TDA2822 Amplifier chip
  3. Micro USB Breakout board
  4. PCB board
  5. 3.5mm or something audio socket
  6. 100 - 1k Ohm Variable Resistor (Trimpot)
  7. 100uF Caps (you need 4 or 6)
  8. For C2 and C7 you can use 1uF then you need 4 100uF caps if u use 1uF

Total Costs : about ~$3

Step 2: Connect, Solder and Finnish It Up!

Try to make it smallest possible to make sure it can fit on your pocket or your wallet!

On this tutorial, I'm not making the case for it because I'm so lazy and kinda easier to adjust the variable resistor to reset the volume limiter.

I'll give it to you how to make the case for this DAC, be creative and don't ask me how to make the case :P

Thanks! Make sure you check my YouTube Channel and support me on Patreon, also Vote me on Audio contest!

Bye!~

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    4 Comments

    0
    MarianoH3
    MarianoH3

    3 months ago

    First of all, thank you. Good amplifier powered through USB. But it is not a DAC. A DAC is a digital to analog audio converter. Here you only amplify the already analog output. In any case, it is always good to remember that we can take the power from the USB ports. I defend it to everyone but as an amplifier, not a DAC. I repeat, thank you and it is always good to share the knowledge. Knowledge should always be seen as the property of everyone and not of oneself. Saludos desde Argentina! :)

    0
    TresNaa
    TresNaa

    Reply 2 months ago

    Sorry if I give it a title DAC, some people might call it DAC because just converting digital signal from USB into analog audio signal but actually good DAC isn't just processing digital to analog signal, they might do more processing like equalization, processing and stuff. I know this is just making an amplifier out of cheap crappy USB sound card, and I didn't make a DAC from scratch since I didn't understand well about making and designing good DAC also don't know how to program DAC and calibrate it. Sadly, I am just hobbyist not sound engineer just want to make something and share for free, maybe sometime I can make real DAC and can share with all.

    Thank you!

    0
    TheLeftyMaker
    TheLeftyMaker

    2 years ago on Step 1

    I think the chip you're using is the TDA2822H, not the TDA2822, correct?

    0
    TresNaa
    TresNaa

    Reply 2 years ago

    Nope, I'm using TDA2822L.
    tbh, I don't really care about the last letter, at least they has a same function that I want.
    You can use both of TDA2822H or TDA2822L.
    The only differences is the maximum voltage input and power output. (i guess)