Make some noise.

Adventures in DIY Audio

Hi, I'm Kenny.

I was bored.

I wanted to hear music while coding at home without the hassle of headphones.

Problem

I could make LEDs connected to an Arduino blink.

That's pretty much the electronics kungfu I had.

Level 1

Gotta start somewhere

Or just start small.

Breadboard amp

Level 2

Raspberry Pi

+ DAC shield + Volumio

Like Lego :)

Level 3

What's simplest speakers you/me can put together?

(HiFi, not piezo :P)

Open Baffle speakers

Level 4-5

Keep calm and solder on.

Buffer/preamp

Side quest 1

OpenSCAD

Code enclosures for  your things.

Send to nearby 3D printing service.

Get awesome case.

Cheap. 

Win.

Temp for testing

Goal #1 reached

Level 99

Trying not to kill myself

With 700+ volts.

Tube amplifier

Side quest 2

LibreCAD

Specify enclosure layouts.

Send for machining.

Get enclosure.

Expensive.

Bragging rights.

Endgame achieved

And that completes the audio chain

Source

Preamp

Amplifer

Speakers

Side quest #3

Make more speakers

Getting endorsement from my wife :)

Key takeaways (audio wise)

  • Digital source
  • Voltage matching is important
  • Amplifier tech is very mature (any one that matches your speakers will do)
  • Speakers are the most inefficient and varied part of the chain; pick these wisely!

What I learned

  • Analog electronics is fun
  • Making practical projects is fun
  • Get a good soldering iron
  • Safety is IMPORTANT

What I really learnt

I don't like magic.

Divide

and conquer.

DIY your audio chain. Share what you made!

The end.