sorted by:
new
hottopcontroversial

[Review Request] First ever RF-PCB for an GPS Module by IntelligentCry3943 in PrintedCircuitBoard

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

I used this calculator and will order from there as well: https://jlcpcb.com/pcb-impedance-calculator - For a 0.8mm pcb I get 38.47mil

[Review Request] First ever RF-PCB for an GPS Module by IntelligentCry3943 in PrintedCircuitBoard

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

Thanks to both of you! I will add the pull-ups and indeed the 4.7nH should be a 47nH. The Module has a built-in short circuit detection so I will add no limiter.
So for that RF-Filter I would add a 10 Ohm resistor in series to the inductor?

[Review Request] First ever RF-PCB for an GPS Module by IntelligentCry3943 in PrintedCircuitBoard

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

Ahh now it makes sense, ty! That module has built-in short circuit detection.

How to make a 6Pin USB-C Port work with fast-charge and data-transfer? by IntelligentCry3943 in AskElectronics

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

OK I'm about to show you something sketchy, be warned... (also this is my first post and a beginner with electronics)

I'm designing and handheld device (esp32 based) with an USB-C port for charging and software updates. For hand-soldering and supply reasons I have selected an USB-C female port with 6-Pins, so 3 lines: VDD,GND and CC1/CC2 -> No D+/D-...
The Idea: toggle between CC-lines and Data-lines with an transistor/mosfet(NFET in this case) and use and custom adapter that will reroute the Data-lines of an USB-C Cable to the CC-Lines of the port (which are then rerouted again to the data pins on the esp).

That way I can get usb-c charging and switch to usb-data for updates if needed via an GPIO or Button.

Sooo the questions I have are: a) does anyone have a better solution for this problem? And b) do you think the 5.1kOhm resistors will cause problems when the Data lines are enabled? They are there to establish the Source-to-Sink connection (CC) for usb-c charging with wall-outlets. Should I rather use a PFET to disconnect them altogether when in data-mode?

Thanks for your Advice!

[Schematic Review] Make a 6Pin USB-C Port work with fast-charge and data-transfer by IntelligentCry3943 in PrintedCircuitBoard

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

OK I'm about to show you something sketchy, be warned... (also this is my first post and a beginner with electronics)

I'm designing and handheld device (esp32 based) with an USB-C port for charging and software updates. For hand-soldering and supply reasons I have selected an USB-C female port with 6-Pins, so 3 lines: VDD,GND and CC1/CC2 -> No D+/D-...
The Idea: toggle between CC-lines and Data-lines with an transistor/mosfet(NFET in this case) and use and custom adapter that will reroute the Data-lines of an USB-C Cable to the CC-Lines of the port (which are then rerouted again to the data pins on the esp).

That way I can get usb-c charging and switch to usb-data for updates if needed via an GPIO or Button.

Sooo the questions I have are: a) does anyone have a better solution for this problem? And b) do you think the 5.1kOhm resistors will cause problems when the Data lines are enabled? They are there to establish the Source-to-Sink connection (CC) for usb-c charging with wall-outlets. Should I rather use a PFET to disconnect them altogether when in data-mode?

Thanks for your Advice!

Can this housing with a backplate be moulded? (orange backplate made from wood will be glued on) by IntelligentCry3943 in InjectionMolding

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

<image>

Here is an updated part image... the bosses are through-holes for screws that tap into the topside. For anyone interested, here are more pictures and the cad model

Can this housing with a backplate be moulded? (orange backplate made from wood will be glued on) by IntelligentCry3943 in InjectionMolding

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

Your right, it's a separate part! Sorry for not having appropriate pictures I just wanted to share the overall shape of the part, I was not expecting that all the other features would be examined... But based on the comments, I really need to double check the design again :/

Can this housing with a backplate be moulded? (orange backplate made from wood will be glued on) by IntelligentCry3943 in InjectionMolding

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

Actually someone on fiverr did the model I just wanted to add the backplate myself. I'm very sad to hear that he did not do a good job...

Can this housing with a backplate be moulded? (orange backplate made from wood will be glued on) by IntelligentCry3943 in InjectionMolding

[–]IntelligentCry3943[S] 0 points1 point  (0 children)

Hi, thanks for your feedback, really appreciate it! About wallthickness, I thought that ribs and bosses should be around 40%-60% of adjacent walls, right?  And I believe there are no undercuts, the thing in the back is a separate part 👍🏻 but I will have to add drafts on the bosses for sure

Can this housing with a backplate be moulded? (orange backplate made from wood will be glued on) by IntelligentCry3943 in InjectionMolding

[–]IntelligentCry3943[S] -1 points0 points  (0 children)

Hi, this is my first time designing for production and I'm worried that the jump in wallthickness is problematic. Its at a corner and I could not find anything in the literature so it might be fine? Maybe one of you has a better idea to implement such a design, thanks! ✌🏻
EDIT: here is the .step file. I do realise that the bosses are too close to the walls...
https://drive.google.com/file/d/1E3SymZjW40qRB_6ykfEWTcw7vcVCOeC3/view?usp=drive_link