Tutorial - Custom DIY Keyboard Design and Build | Part 4: PCB Layout

[@RobertFeranec]

If you are still following this tutorial, please like this comment.

[@biswajit681]

Excellent Robert.... could you please interview video on Power supply design for FPGA

[@amir_abbas_992sh7]

cool... When will you make a video of soldering parts?

[@ae_circuit]

Why you have not merged the tracks with the same nets ?33:00

[@RobertFeranec]

sharing tracks, VIAs or decoupling capacitors between multiple pins is not as good as having dedicated tracks VIAs and decoupling capacitors for each pin ... very simply to say even these pins are on the same voltage, they may drive different currents and we don't want to mix these currents together (the most noisy currents will be on the track between pin and decoupling capacitor, so we don't want to connect other pin there) ... of course, planes would work too, but tracks are also fine

[@misckicirina]

By the way, it would be great if one of your next projects will be PCB design of a board containing a really good ADC (such as ADS1263) and an MCU (ESP32 or RP2040).

[@ae_circuit]

1:37:23 Why use buffer but not the MOSFET-based logic level shifter? Something like BSS138? It'd be great if you could share the thought process behind the selection of stages during the circuit design.

[@RobertFeranec]

buffer always works and especially if beginners need to shift voltages now they will know they can simply use this kind of buffers. transistors can be sometimes tricky and people using them need to understand the circuit well.

[@gregfeneis609]

1:04:00 It looks like you're putting some effort into keeping tracks away from holes. Does EasyEDA not have a design rule that can be set that prevents the track from getting too close during track placement? Edit: 1:10:01 Ah-ha, I see the hole clearance enforcement working just a little bit right here. I imagine it's just a matter of tuning a setting.

[@RobertFeranec]

EasyEDA does have the rule, I just didn't want to go to the limits if not necessary. Sometimes using limiting values just in a few places on PCB can make the PCB unnecessary more expensive.

[@misckicirina]

Really nice and informative tutorial, thank you. In a PCB that has also analog tracks, for instance the input tracks to an ADC, how do you choose the track width? Still 50 Ohm or you use larger width (lower impedance) for these analog tracks?

[@RobertFeranec]

thank you. I usually use wider tracks for analog

[@Happy_World_1]

🙏

[@biswajit681]

Hi Robert any black friday sale on course?

[@RobertFeranec]

the best is to send an email to [e-mail] and ask for discount

[@RBlabs]

👍

[@aditya2033]

Hi, Robert, what is the track width and spicing between tracks for 10Gbpd SATA Gen III @ 90 Ohm impedance? replay pls

[@RobertFeranec]

it depends on PCB stackup. Download Saturn PCB toolkit (free software) and put there information about your stackup, the software will calculate space and track width (track width is usually 50ohms for single ended track of differential signal)

[@aditya2033]

Thanx Robert

[@GobalKrishnanV]

Super sir, can i get remote job, now i learn on pcb designs using kicad and cadence, which is better sir?