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PCB thread. Post your PCBs.
This board is a Dreamcast mod for S/PDIF (digital audio). All the work is done by the CS8406 to generate the S/PDIF signal. One of the incoming signals had to be inverted (EMPH to /EMPH) and so there is a hex inverter on the board as well.
I can share a couple I did while at faculty and for my own projects
This was an adjustable load (chain of SPI pots) which connected to a RPi for testing of photovoltaic cells for someone else's master thesis
PCB for testing a custom IC (bonded to a separate PCB which joined through a mezzanine connector), includes supply and signal conditioning for some of the higher frequency stuff (~2MHz).
Another test PCB to which a custom IC was bonded.
This was for testing a ultra wideband transmitter, you can tell this was much higher freq stuff (3-9GHz IIRC), as short paths as possible and heavy via stitching
Includes also a couple of shunt regs all with external overrides, nothing fancy.
>>54738499
>>54739358
>>54739404
>Eagle
'no'
This one was for a personal project, oldest of all of the above (2009), a class-A headphone amplifier based on the design by Greg J. Szekeres and AMB's M^3.
>>54739474
What's your reasoning, what has it failed you for?
And what do you recommend?
I've used for simple designs all the way to RF (as seen above) and no issues so far.
I can imagine if you're doing digital/embedded it might hit its limits, but otherwise it serves it purpose.
Pic is an even older hybrid (valve/SS) head amp I built for a friend.
>>54739404
What is even going on here, why are there a billion vias or whatever it is everywhere and why are the actual traces and pads so hard to see?
>>54739606
Vias are there to connect both ground planes together. This is sometimes called "via stitching" and it's used to make sure ground potential is the same everywhere and is specially important when high frequency signal paths exist.
The traces are small because the connector pads are already small, so makes no sense to extend the trace width past that.
Pic is a simple design for a faculty course, it was an serial (USB) SPI sniffer for debugging, with isolated connections.
It seems OP only had one PCB to post and there's no one else interested, so here's a last post.
Pic was the PCB where the custom IC bonded to, and then connected to >>54739404
What do you guys use/recommend?
I've only ever tried PADS and a little Altium Designer.
>>54740047
kicad because FOSS
>>54740075
How the fucking fuck do i via stitch in kicad like >>54739404
It's impossible to do in Kicad.
I've honestly never required via stitching, but I know it's a pain in the ass in KiCad.
>>54740920
I want to do if for heat relief purposes and i can't and my charge controller shit will fry itself.
>>54738499
you need to tie the unused inputs on your hex inverter to either +5 or ground.
do you guys make your own pcbs at home or contacto some local company?
>>54741066
i did a few pcbs at home but i never want to do that sketchy ironing toner transfer shit, inhaling killer dust during drilling and killer fumes during etching shit again in my life so now i order them from a company to keep my sanity
>>54740888
>>54740920
Opensores strikes again!
>>54739566
is that a fucking tube footprint?
>>54742106
Yes, that's hybrid amp. Valve (tube) for the gain stage and solid state for the output stage.
this is my traffic light controller. fits into standard 14" housing and switches 120VAC with opto-triacs and power triacs. Controlled by ATMega328p.
