Max4411 headphone amp breakout board

Ragtop

I was wondering if anybody sells a Max4411 headphone amp breakout board? I would like to use the wav player object with a non-demo board propeller set-up.

Or is there a thru-hole version of this IC?

Leon

I was thinking of designing a PCB for the MAX4410. It will in fact be the complete circuit, with the various capacitors. I'm not sure whether to include the headphone socket. Here is the schematic so far:

LoopyByteloose

I'd consider adding a NE3352 op amp for a mixer/preamp and configure the whole thing to be stereo if you are serious. (see Elliot Sound Projects - P94 for a design example) While some may want a mono version, most would want stereo for a 'real' head phone amp, which this is. And of course, if one desires mono, provide for merely populating less of the whole board with provision for mono inputs and outputs, as well as stereo 3.5 jacks.

Leon

It's just going to be connected to a Propeller, it doesn't need a pre-amp. My board supports stereo input and output.

LoopyByteloose

I do realize that it doesn't need a pre-amp. But the added features of a mixer and a pre-amp just make the board multifunctional. I suspect the cost of making a break-out board and the cost of making a break-out board with other features is nearly equal.

But the other features would broaden the demand for it.

Just tried to help out.
Personally, having the Propeller able to mix sound with other sources is appealing to me.

rogersyd

This is exactly what i need for a new project... (stereo, with the headphone jack please)

I have a project built on a ppdb that really needs to find a new (permanent) home...

The schematic for the ppdb circuit doesn't seem to be too intimidating. I suppose i could just build it. Weird that i cant find something comparable to this in a breadboard friendly fashion... other than the $60 eval board, which is um, just a bit overboard.

found two boards that might work for those looking for a similar solution:
Teensy Audio board: https://www.sparkfun.com/products/12767
PAM8403 breakout board http://www.ebay.com/itm/161116580464

Leon

I've just updated the schematic, according to the application circuit in the data sheet.

What input connector would you like?

rogersyd

A simple SIP breadboard friendly package would be useful for my application. Or solder pads for the L/R in, vdd,and vss, with a built in 3.5mm stereo jack on the output would be also work. Just my two cents... i would image the former would have broader hobbyist appeal, while the latter would provide greater mounting flexibility for those building permanent projects. Either way, i was able to locate two boards that provide similar functionality, that teensy board looks cool as it also contains a SD reader. But i already have a few of those laying around... I know nothing about the PAM8403 used in the ebay board, but it looks fairly easy to integrate into an audio project.

Some background on the project...
I'm building this Sid Dump player for my brothers bday. Inspired by the SidStick that used to be for sale over on gadget gangster. My implementation will include a few input buttons for mode selection, and a small display for file navigation. I've settled on the project board as basis for the unit. I'm toying with two different display options right now, not sure I want to give up my uOLED128 or instead just use a monochrome 128x32 OLEDs from adafruit. The original version i cooked up (on the ppdb now) uses rca video out, but the more i think about it, the device will be more practical with a built in display.

Leon

I hardly ever use breadboards, so just solder pads would make more sense for me. I'll see if I can design the PCB to provide both options, with holes in the pads for right angle pins.

I'm looking for a suitable stereo socket. I have some expensive professional ones but they seem to require a slightly bigger plug than the standard ones, which don't make proper contact.