PCB : need advice(s)

[EATYone]

Hi,

Newbie in PCB design here. I need some advice before asking JLCPCB to produce a little PCB for me. Working on some synth project with 4.1 and Rev D audio board and want to make my own PCB to prototype some stuff. Can someone tell me if it's a good idea? And if i have to choose differents thickness for my tracks? Same question for an encoder board (don't need encoder's switch)? (Sorry for the poor English i'm newbie too...).

Regards,

Guillaume

 

[KenHahn]

With larger setups like this, it is usually easiest to create a PCB rather than trying to breadboard stuff. That is especially true when working with the Audio Adapter that can be picky about wiring layout.

It is pretty hard to make out your layout, but I have a few suggestions.

In general you need to run larger traces for the power and ground runs. They look like they are probably 10mil. I would make them as large as possible and at least 20-30mil. I typically use 50mil where possible. If you are using auto routing, you can set the GND, 3.3V and 5V nets to use larger traces, though you may find it easiest to route the power and ground traces by hand first and then let auto routing handle the rest.

You may want to add spots for adding 75 ohm or so resistors on SPI pins 11 & 13 close to the Teensy. They can sometimes be helpful in resolving signal reflections that can occur when you have longer trace layouts and they won't hurt in any case.

I don't understand how you are connecting the 22-pin header on the rotary encoder board to the headers on the Teensy board. Perhaps by running individual jumpers? If it was me, I would probably add something like a 2x12 header on both and use a IDC cable to connect the two so you have good solid connections between the boards. Debugging intermittent wiring is no fun.

Your ran 2 GND pins to the rotary encoder board. I would connect them both together on the rotary encoder PCB.

It looks like you have labeled your 3.3V and GND headers backwards on the schematic and perhaps on the layout as well.

 

[EATYone]

Many thanks!!!!! Will read that

 

[EATYone]

In general you need to run larger traces for the power and ground runs.

Will try that, never try to route myself

ou may want to add spots for adding 75 ohm or so resistors on SPI pins 11 & 13 close to the Teensy.

If i add spot and don't use resistor do i need to solder a jumper in place?

I don't understand how you are connecting the 22-pin header on the rotary encoder board to the headers on the Teensy board.

The encoder board is one project, but the breakoutboard is for many other ones, so for the monment will proceed with wires yeah...

Your ran 2 GND pins to the rotary encoder board.

done! don't understand why they zaren't connected cause they are on the schematic

It looks like you have labeled your 3.3V and GND headers backwards

need to change my glasses thanks!

Guillaume

 

[EATYone]

Encoder board is ok.... But the breakout board is full of DRC error... Have to learn more