/diy/ - Do It Yourself

Anonymous Sat May 2 08:36:32 2020 No.1810878 [View]
File: 35 KB, 493x436, 3v3.png [View same] [iqdb] [saucenao] [google]

Hey lads, i have a Teensy board with an Atmega32u4 microcontroller that needs to run on 3.3v instead of 5v for the project i'm using it in. The board has an option for this shown in grey on the schematic - you install a regulator, cut the trace between the middle pad and the "5V" one, then solderblob it with the "3V" pad.

My question is this - the board works fine even if i don't bridge the "3V" pad in the end, so what is it for? It always connects the mcu's internal 3.3v UCAP pin to its 1uF capacitor, so what's the point in tying it to the new regulator?

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/diy/ - Do It Yourself

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