# How to select a MOSFET when using 3.3v / 5v Logic level [duplicate]

This question is an exact duplicate of:

1. I want to control/dim a 12V LED strip. When using an Arduino, I used a MOSFET IRLZ44N, and a 12V DC adapter - it works as needed.
2. I wish to use same hardware to control it remotely; a Wemos Mini is used as an Arduino replacement for that purpose.
3. When using Wemos Mini, I get only 7.9V at Vds - which led me to ask this question, bearing in mind that Wemos has 3.3V logic, which is probably the reason since a lower Vgs is applied.

I'm trying to determine what I am not understanding using the datasheet and graphs, since for 3.3V-logic-based projects an FQP30N06L was recommended.

I do understand Vgs, Vgs(th), Rdson, Vds , but still - I can't understand, spec-wise, what to find in order to get a Vds of 12V for a LED strip.

## marked as duplicate by W5VO♦Sep 17 at 17:52

This question was marked as an exact duplicate of an existing question.

• Do you have a schematic of how you're wanting to wire things up? If you don't, try using our schematic editor plugin that we have built into this website. The answer to this question may just be that you need to hook up your FET's drain at the 12v with the 3.3v GPIO at the gate. – KingDuken Sep 17 at 15:42
• Not having it at the moment. But since it works as needed using Arduino- I’m assuming wiring is not wrong – Guy . D Sep 17 at 15:48