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: May 24, 2019, 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.

Re: TinyZero with LED
« Reply #2 on: June 10, 2019, 11:36:59 AM »
Almost every LED has about a 0.7V voltage drop across it. You should always use a current limiting resistor in series with any LED. There are specific resistances for each color LED as the current required for each is different. Typically a resistor from about 300 ohms to 1k ohm will do the trick.

Hope this helps.

Re: TinyZero with LED
« Reply #3 on: October 09, 2019, 05:51:49 AM »
No matter how many times this issue is raised, it is often mentioned.