ESP32-LyraT-Mini schematic - Grey parts?

Willybood
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Joined: Sat May 15, 2021 8:20 am

ESP32-LyraT-Mini schematic - Grey parts?

Postby Willybood » Sat May 15, 2021 8:27 am

Good morning.

I've been working on a new PCB design based on the ESP32-LyraT-Mini. Its schematic (https://dl.espressif.com/dl/schematics/ ... 190605.pdf) has a bunch of components that are light grey, some of which don's appear to be on the board. Why are they on there? Why are they marked differently?

Thanks for your help.

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ESP_krzychb
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Re: ESP32-LyraT-Mini schematic - Grey parts?

Postby ESP_krzychb » Sat May 15, 2021 3:37 pm

Hi Willybood,
Welcome to the forum and good afternoon :D
Components with names grayed out are optional and not installed.
They also have (NC) in the name (no component)
For example U2 ESP32-WROOM-32D(NC) is a cheaper version of ESP32 module without PSRAM that may be used instead of ESP32-WROVER-B, if your application does not require PSRAM.

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