PCB design help

[tankie3k]

I "designed" my first pcb (I remixed the g boy uamp board). It currently passes DRC but I don't know if there will be interference in the audio lines or how to fix it, does anybody have any tips?

 

[stonedDiscord]

unrelated to interference, usually you try to avoid 90 degree bends in traces to get better results after etching (and some other reason i forgot).

 

[tankie3k]

Fixed, Thanks for the tip

 

[Stitches]

unrelated to interference, usually you try to avoid 90 degree bends in traces to get better results after etching (and some other reason i forgot).

Sharp pivots create an impedence mismatch. It exists in all hard angles, but is most tangible with 90 degree bends. It mostly only matters for high frequency applications, RAM, CPU, GPU direct connections and such, but you do get a slightly (read: almost imperceptibly) cleaner signal for other uses as well.

Plus it looks nicer

I "designed" my first pcb (I remixed the g boy uamp board). It currently passes DRC but I don't know if there will be interference in the audio lines or how to fix it, does anybody have any tips?

IIRC keeping MCLK away from the other audio lines and keeping it flanked by ground pours will help audio integrity a bit, as does using shielded wire. Keeping the voltage lines away from the audio lines wherever possible is also recommended. This principle applies to the wiring as well; if you can keep data wires away from voltage wires and noisy components like inductors, make sure to do so. Also, keeping data wires as short as possible will help prevent some common issues like intermittent crashes and components not registering in RVLoader

 

[tankie3k]

Thanks for the info! I might have already ordered the first prototype, but I will definitely fix the files.

 

[tankie3k]

This is my final iteration, my goal was to make a g boy with composite video out and a switch for toggling the screen and jack I'll leave it here if somebody wants to use it instead of the electron analog2hdmi.

edit: New version with better ground plane and reusing 3.3v from the board