[For Sale] $7 Game Boy Zero Controller PCB W/ Optional Audio $20 (Worldwide) SOLD OUT

[Quatrerwin]

I wasn't doing pwm audio though. I had a cable hooked into a breadboard from my phone to the amplifier. There was a bit of noise that did go away when the power was cut, but other than that, no audio.

[Helder]

Could anyone that bought and received the audio board please test it out, I think there might be an issue with the amplifier and confirmation of it working or not will be needed so I can see if it's something that is on my end with my test boards or overall in all boards.

Thanks.

Don't know if this is what you were looking for, but I was getting a bit of noise on mine. Not sure if it was the amp or incorrectly wired (audio left directly connected to pot 3, right connected to pot 4. For the outputs, I had ground connected to ground on headphone jack, left to left, and right to right. Also 5v and ground directly conned to power supply)

So no sound or audio what so ever?

[Quatrerwin]

Other than that bit of noise, no. I do have another stereo amp that I know works. Trying to find it to test my set up!

[Quatrerwin]

I'm not getting a result from the other amplifier either. It might be the setup of the headphone jack that's faulty. I did test the output of the known working amp and I was getting a signal, just no audio.

I was getting a signal out of yours too (though it it had noise where the other didn't--could be because I didn't know where to hook up the input audio cable's ground (L-/R-) on yours. I have a USB DAC, so this will probably become an issue for me), just nothing through the audio jack.

[Helder]

Thanks for the testing, hopefully more people post their results too. I'm going to test it with my oscilloscope to be sure something is coming out.

[SPB]

@Helder: Just received your PCB in the mail, thanks a lot, that thing looks awesome.
Two questions, where do you get a PAM8403?
And does it only work with PWM-Sound? Or could I hook up a USB-Soundcard to it?
Thanks again on the quick delivery

[Helder]

Ebay has them as well as Aliexpress or Alibaba.com.

You can use a usb sound card just take it's output to the Volume Wheel pot 1 and pot 2 then solder a wire from pot 3& 4 on volume wheel to pot 3 & 4 on my board.

[Quatrerwin]

How would we wire L- and R- when doing usb stereo? I get that L+ and R+ go to pot pins 1 and 2, but not where L- and R- would go.

[gargoyle67]

@Helder,
So are you going to delay sending the audio boards until you find the issue ? No rush I'd like bug free boards

[SPB]

Ebay has them as well as Aliexpress or Alibaba.com.

You can use a usb sound card just take it's output to the Volume Wheel pot 1 and pot 2 then solder a wire from pot 3& 4 on volume wheel to pot 3 & 4 on my board.

Thanks for the quick response. One last question, the amplifier circuit needs to be done completely with an usb-card, right?