How to wire a MOSFET?

I have some CCFL's that i want to switch on and off with an Arduino like board. I think i have wired them up right but it doesn't seem to be working. I'm using the IRF530 MOSFET (data sheet here: and i'm powering the CCFL's from an old PC power supply.

That's NOT a logic level MOSFET. You want an IRL 540.
Or IRL520 as below
Oh aye.
rickharris4 years ago
Typical fet switch cct.

From a wonderful source of interfacing ccts.

make sure your FET can be switched with logic levels.