ESP32-PICO-KIT V4.1 Vin 7-12V which pin? 3.3V which pin?

[knightridar]

Hi, I just got ESP32-PICO-KIT V4.1.
From digi-key:
https://bit.ly/2IJNIZF

I've downloaded data sheets for it from the Espressif website but am still confused.

Where is the 7-12V input pin?
What if I have a buck converter that steps down the voltage to 3.3V, where do I plug it in? The 3V3 pin?

Thanks.

[lbernstone]

There is no 7-12V input. The 5V input is connected to the USB->UART adapter (CP2012), so applying >5V will burn that chip. Use 3V3 on the 3V3 pin, or 5V on the 5V pin.

[knightridar]

Got it thanks.
It wasn't clear if those 3v3 or 5v pins were just outputs or could be also used as inputs.
I will use them as both using this buck converter:
https://bit.ly/2G5QQNm