TinyCircuits

TinyZero with LED

TinyZero with LED
« on: April 23, 2019, 12:11:06 PM »
When I connect an LED to an Arduino digital pin, I usually put a 220-ohm resistor in series. However, since the TinyZero is 3.3v instead of 5v, is that still necessary?

Re: TinyZero with LED
« Reply #1 on: Today at 04:17:51 PM »
It depends on the voltage drop of your LED. Most likely, you will still need a small resistor.

However, if the voltage drop is very near 3.3v, which is quite possible with a white LED, then you will not need the resistor.