Finished Silkscreens

I finished up moving the silkscreens for the component labeling, and adding art to the front and back. I plan on using this board with some medical sensors, so I leaned into the medical theme.

Finished Fixing Errors

It took a lot of time searching through documentation and looking up errors, but I managed to bring the errors down from 96 to 0. I also solved schematic parity and the unconnected items problems as well!

Finished Routing + Began Fixing Errors

I finally finished routing and filled in the filled zones on Layers 1, 2, and 3.

The problem is that when I ran the Design Rules checker, I got a lot of errors, so I am gonna be working on fixing those shortly.

Continued routing + Added filled zones

I have been working for quite a bit since my last journal, and I wanted to add another entry, even though I haven't reached any sort of stopping point. But basically I have routed about half of the GPIOs. I also added two filled zones on layer 2 and layer 3, just for convenience and for the data lines to get to around 90 ohms of impedance.

Started routing

After a lot of looking at documentation, I finally managed to connect the data lines using JLCPCB's impedance calculator. I ultimately went with a 4 layer PCB design (non coplanar), because getting to 90 ohms with a coplanar design was making me unable to use all of the ESP32's GPIOS.

Changed Switch Footprint

The footprints for the reset and boot switches didn't match the part, so I changed the footprints in the footprint editor to match the footprint for the part (1122->1234).

Finished Schematic Design

I looked through the datasheets of all the parts I wanted to use, and started looking through what mass produced ESP32S3 Devboards have and what I need to add/remove to adapt it to my use.

My final schematic looked like this:

ESP32 Variant Selection and Initial Schematic

After looking through documentation, I decided on an ESP32 S3. This is because it is easy to work with and does what I need it to do. I want it to be smaller than the size of a normal ESP32 Devboard, and I want it to have the Bluetooth and Wifi all ESP32s have. I don't care too much about extra features, but I want to remove some stuff I don't need or use.

Main:
ESP32-S3-MINI-1
USB-C (Since I have more usb connecters than Micro USB ones)
TLV75801PDRV
D3V3XA4B10LP

Extras:
SPI LEDs (maybe)
USB LEDs (also maybe)

I am still thinking about what else would be good to add.