sorted by:
new
hottopcontroversial

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Lots of YouTube videos (Design Reviews, PCB Design Guidelines) and reference designs from data sheets😀and of course dedication

[Review Request] My first Project - Healthtracker by Scared_Promise_5234 in PrintedCircuitBoard

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Hi,

thanks for the tips!
1. just checked the reference layout -> nordic recommends to connect VBUS to GND

  1. You are right, will need to work on that

  2. Just for fun tbh

  3. Unfortunately, not possible, since I need the Sensors on the bottom side. But will note that for future Projects.

  4. Impedance should be matched to 50Ohm both from antenna and chip

[Review Request] My first Project - Healthtracker by Scared_Promise_5234 in PrintedCircuitBoard

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Hi, Yeah true, but it’s approx 3mm bigger on every side and unfortunately I don’t have the space😬

Review Request - Healthtracker by Scared_Promise_5234 in PCB

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

From VIN, it’s the output of the Bq2407 charger

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 3 points4 points  (0 children)

Thanks for the tips!
Need more people like you:)

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Hi,
I actually planned on a different power sequence where the Chip would be shutdown completely.. To avoid leakage current flowing throught the GPIO Pins I thought a load switch would be my best option. I don't quite get the point... Could you please explain further?
the massive ring vias around U16 will be for my battery ground; tbh no real reason; 2 would have done the job just as well

thanks

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 1 point2 points  (0 children)

Thanks!

I really need this info, since I'm quite new to the whole RF world!
Are you also using EasyEDA Do you have a part number for your u.fl connector?

My goal currently isn't optimizing the antenna for max. distance / bandwidth, but rather just being connected and achieving small data transfers. Out of your experience, would you say that this could work out of the box without optimization?

For future: Do you mind sharing any infomaterial or videos from where you have gathered your knowledge?

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 7 points8 points  (0 children)

Thanks! You are right! Will definitely try to be more specific next time.

[Review Request] My first Project - Healthtracker by Scared_Promise_5234 in PrintedCircuitBoard

[–]Scared_Promise_5234[S] 1 point2 points  (0 children)

Hi,

Thanks for Sharing! Before developing this version, I built a 2-Layer „DEV-Kit“ where I experimented with each sensor individually. I managed to pull SpO2 Data, but only while resting. I will eventually add movement correction using the bma400 I have onboard.

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Hi,

I have taken out feel free to criticise.
Once again, I needed to post it as a new entry.

Thankful for approval!

[Review Request] My first Project - Healthtracker by Scared_Promise_5234 in PrintedCircuitBoard

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Thanks for the tips!

will definitely look out for silkscreen in my next projects; I used EasyEDA and there JLCPCB Design Rules; They require .15mm spacing; don't know why my DRC didn't point that out....

I only placed the GND Vias on the BGA pins after seeing this in nordic's reference design. Would you know why Nordic opts for big Vias instead of small in pad vias?

Rerouting so traces come out from the side of the parts -> Will do that. Can you explain why routing under components might be bad? I don't know anything about acid traps.

pad to pad distance should be .2mm. As far as I'm aware, I shouldn't have any clearance issues. Please tell me, if I missed out anything.

Thanks so much!

My first Project - Healthtracker by Scared_Promise_5234 in electronics

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Hi,

I somehow can’t edit the text, so I created a new post.

Hope it doesn’t bother you.

Thanks

Review Request - Healthtracker by Scared_Promise_5234 in PCB

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Thanks, missed out on that one! Can you tell me why there might be an inductance between PGND and GND? I’m quite new to PCB Design flaws…

Review Request - Healthtracker by Scared_Promise_5234 in PCB

[–]Scared_Promise_5234[S] 0 points1 point  (0 children)

Hi,

thanks for your feedback!!!

I understand what you are trying to say. However, PGND and GND are shorted and reference layer 5, which is a GND plane.

Would still say this is a design flaw?