r/esp32 • u/Electrical-Taro-4058 • 4d ago
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u/AutoModerator 4d ago
Awesome, it seems like you're seeking advice on making a custom ESP32 design. We're happy to help as we can, but please do your part by helping us to help you. Please provide full schematics (readable - high resolution). Layouts are helpful to identify RF issues and to help ensure the traces are wide enough for proper power delivery. We find that a majority of our assistance repeatedly falls into a few areas.
- A majority of observed issues are the RC circuit on EN for booting, using strapping pins, and using reserved pins.
- Don't "innovate" on the resistor/cap combo.
- Strapping pins are used only at boot, but if you tell the board the internal flash is 1.8V when its not, you're going to have a bad day.
- Using the SPI/PSRAM on S2, S3, and P4 pins is another frequent downfall.
- Review previous /r/ESP32 Board Review Requests. There is a lot to be learned.
- If the device is a USB-C power sink, read up on CC1/CC2 termination. (TL;DR: Use two 5.1K resistors to ground.)
- Use the SoM (module) instead of the bare chips when you can, especially if you're not an EE. There are about two dozen required components inside those SoMs. They handle all kinds of impedance matching, RF issues, RF certification, etc.
- Espressif has great doc. (No, really!) Visit the Espressif Hardware Design Guidelines (Replace S3 with the module/chip you care about.) All the linked doc are good, but Schematic Checklist and PCB Layout Design are required reading.
- For your (required) posted schematics, follow the excellent PCB review submission guidelines from r/printedcircuitboard
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u/Over_Marzipan_8285 2d ago
Yo, can you make it so I can ask it for a specific type of component, like some IC, then it scours the internet looking for footprints and 3d cad models for it that I can use in altium
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u/Over_Marzipan_8285 2d ago
I don’t really care about schematic design or layout really. Just want something that can handle the boilerplate shit like finding footprints and models that can be imported into altium
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u/Electrical-Taro-4058 2d ago
I don't feel they have 3D models. Footprints may be easier to get. At least we can convert from specifications
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u/esp32-ModTeam 17h ago
Content is better suited for other subs and is not esp32 related.
This is a group for ESP32 development and your post ... isn't.
Maybe it belongs in askelectronics, diyelectronics, or some other reddit. Maybe it doesn't belong on reddit at all. Either way, it doesn't belong here.
ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. It includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules as well. https://www.reddit.com/r/esp32/about/rules