Electronic – arduino – ATtiny13A on 3.3V not working

3.3varduinoattiny

I'm trying to get the ATtiny13A to run on 3.3V which, if I'm not wrong, would be possible.

I've programmed the chip using an Arduino Uno. I'm doing a simple blinking LED example and when I power the ATtiny with Arduino's 5V pin it works without any problem. If I power it with Arduino's 3.3V pin it does not light the LED.

This is my Arduino IDE's config when programming the ATtiny:

enter image description here

I've tried other configurations also.

Am I doing something wrong? Do I need to program it in a different way or do something else?

Edit to add more info:

I'm using this guide (or a similar one, don't exactly remember if it was that one).
This is how the connections look like:

enter image description here

Red LED connected to pin 4 with a 220ohm resistor.
Also, I've measured voltage on that pin 4 of the ATtiny when connected to 5V and it's outputting ~6V but 0V when connected to 3.3V.

Best Answer

Make sure your BOR settings are appropriate for a 3.3V supply.

enter image description here