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Djouaihia , 06-29-2025, 10:38 AM

good morning everyone, , i have question in your tutorial on youtube https://www.youtube.com/watch?v=KWIzhbQaZZk&t=2522s
How to Make Custom ESP32 Board in Altium Designer | Full Tutorial

in 44:06 mr robert feranc connect pin 1 and 2 together, and pin 3 and 4 together, and in schematic they are connected pin 1 and 4, and pin 2 and 3, or all frame in blue is a symbole? can you help me to understand part of tutorial, waiting for your favorable answer, please accept my deep respect.
Cordially yours

SirJames , 06-29-2025, 12:14 PM

Every manufacturer number pins of their buttons differently. Mr Feranec uses buttons from C&K but ESP32 DevKit designer used buttons from N&H Technology.

SirJames , 06-29-2025, 12:14 PM

always check with datasheet

QDrives , 06-29-2025, 03:40 PM

Pins 1 and 2 are internally connected together inside the pushbutton. Same goes for pin 3 and 4.
This is according to both datasheets https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/2576/PTS%20Series.pdf as selected by Robert and https://www.nh-technology.de/T-Mec/PDF/Series_TC/NTC013.pdf in the original.
Espressive has a mistake in they symbol.
They picked pins 1 and 3 to connect. Looking at the layout and the pin numbering on the datasheet, the footprint also does not match with the datasheet.
However, **by luck**, they (Espressive) have picked pins that are on either side of the switch and left the others open.
Robert has the symbol, footprint and schematic connections and numbering correct.

QDrives , 06-29-2025, 03:41 PM

In this case, both manufacturers use the same numbering.
However, Espressive made errors in their symbol and footprint. **By luck** the pins selected and leaving the other 2 open, it works.

Djouaihia , 06-29-2025, 06:39 PM

thanks for your answer you are useful, now its clear.