Bluetooth rotary phone from PTT T65

[tggzzz]

About the schematic, it can do with some improvements to make it a mix between what Benta is stating and what you made. Connecting everything with wires might make it unreadable too, due to a mishmash of wires. For this busses can be used, but labels work too.

That's normally not a problem if the parts are placed intelligently.

I think "good taste" is a useful concept in such cases.

[tggzzz]

I do that normally - multi-sheet with inter-sheet connections. But the difference is that there is a top level sheet that shows the connections between sheets so it's easy to both get an overview and see which are connected where. Also, in a sheet there is only one labelled port for a signal (at either far left or far right edge), so there is never the case where you might have more than one port of the same signal on a sheet connecting to different parts.

Ah, bliss

[tggzzz]

Indeed, but then why ask for opinions?

Maybe because he is not confident enough about his hardware design skills and wanted to verify that the design is correct on chosen parts and values level that is, and not to check if his schematics drawing skills are up to par.

Quite possibly, but a poorly drawn schematic makes it difficult to understand and more likely that a reader would miss a subtle but important point, and less likely that a reader will bother to spend their time/energy on somebody else's "problem".

[Zipdox]

Indeed, but then why ask for opinions?

I wanted input about the electrical schematic, not about the style.

[Benta]

Then I suggest the following:
Ask a moderator to lock/kill this thread.
Redo from start and ask exactly the right question(s).
You have the initiative.

[tggzzz]

Indeed, but then why ask for opinions?

I wanted input about the electrical schematic, not about the style.

You asked for, and got, comments on the schematic....

I'm turning a PTT T65 into a Bluetooth rotary phone, and I would appreciate it if some people took a look at the schematic and gave me their thoughts.

Did you actually want comments on the design?

A tastefully drawn schematic helps make a design obvious, exposing its intended operation, strengths, and weaknesses. A poor schematic obfuscates the intention.

[Zipdox]

I did some testing with the switches and the rotary dial is rather bouncy, so a 10k resistor with a 1u capacitor was the right call for debouncing in my opinion.

[Zipdox]

The PCB design is done. I had to cram everything in the bottom due to the bell occupying the middle. I also put the traces connecting the top and bottom on the bottom layer as the bell's metal might damage the silkscreen. I stitched the GND planes where I thought it made sense to reduce the loop area. I would appreciate some feedback on the design before I order it.