Nano-style ESP32 dev board | KiCad EDA | Page 1

zealous radish May 9, 2024, 9:19 PM

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Because the "devkit" and similar variants (nodemcu, heltec, etc) are too wide and not breadboard-friendly.

I started this just out of curiosity if it was possible, even with the constraints that I would use JLC "Basic" and "Preferred" parts over alternatives, even if they were bigger. It became a 4-layer two-sided load, but with this it turns out to be very possible. I even added an RGB LED that's generally not found on dev boards (it's found on some (most?) RP2040 boards)

It's not pin-compatible with anything. I purposefully kept the order of pins to mimic the QFN chip (except power pins).

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Progress update:
Component locations mostly accurate and locked.
Tracks are plopped down as quickly and as compact as possible (using push&shove) and need to be cleaned (I plan to round most or all tracks).
Vias are mostly in the right place.
Ground and 3V3 connections are mostly non-existent and inner planes should provide those. I already added component-to-plane vias where it was easy to do. This definitely needs a final double-check.

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Also, I added optional cap footprints on all ADC1 pins (the input-only pins)

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Oops, not all ADC1 pins, just the input-only pins. Might change that.

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south bough May 9, 2024, 9:35 PM

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Very cool! What's FB1 and what's the layer stackup?

frigid cave May 9, 2024, 9:40 PM

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south bough Very cool! What's FB1 and what's the layer stackup?

Ferrite Bead, for filtering/EMI/noise

south bough May 9, 2024, 9:41 PM

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Interesting, why do I never have heard of them?

frigid cave May 9, 2024, 9:42 PM

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Great question! I don't know.

zealous radish May 9, 2024, 9:50 PM

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south bough Interesting, why do I never have heard of them?

Don't you also have one in your design? (i can't find your schematic because you stopped updating your WIP thread and it got lost in the normal channels)

south bough May 9, 2024, 9:50 PM

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No I don't, that's the first time I see I think

zealous radish May 9, 2024, 9:52 PM

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very similar

south bough May 9, 2024, 9:52 PM

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Ah ok I see

zealous radish May 9, 2024, 9:52 PM

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i might swap the symbol because it's the same part

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i copied this symbol from a design from work

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https://jlcpcb.com/partdetail/Sunlord-GZ2012D101TF/C1015

GZ2012D101TF | Sunlord | Ferrite Beads | JLCPCB

GZ2012D101TF from Sunlord - Ferrite Beads is available for JLCPCB assembly, check the stock, pricing and datasheet, and let JLCPCB helps you assemble the part GZ2012D101TF for free.

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Actually no, different part. More research needed.

zealous radish May 9, 2024, 9:59 PM

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south bough Very cool! What's FB1 and what's the layer stackup?

Layer stackup SGGS, power tracks will go through IN2 (probably through the middle since all signal tracks are near the sides)

south bough May 9, 2024, 10:02 PM

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Don't you route power as signal?

zealous radish May 9, 2024, 10:04 PM

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I don't route power on outside layers, if that's what you meant

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except of course right in the middle of the power supply section

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I'll route V_UART on outside too because it goes vertical

prime crest May 26, 2024, 10:23 PM

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zealous radish

did you make that esp32 symbol yourself?

zealous radish May 27, 2024, 6:09 AM

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Yes

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I should post it on GitHub, but I've been too busy with non-hardware projects lately

#Nano-style ESP32 dev board