This should work for a purely resistive load.An IRL3705N would be a better choice as its Rds(on) value is 18mΩ at Vgs = 4v.I like to use 10k instead of 100k.
Question: With the 1K/10K resistance split, will the Nano provide enough voltage to fully turn on the MOSFET?
There is no split. Look closely at where the output of the Nano connects to the resistors.
Most definitely keep the 220 ohm resistor, it protects the Arduino should the MOSFET fail shorted amongst other things.
I need to control a resistive load from a PWM output from an Arduino Nano. With my very limited knowledge of MOSFETs, I thought about using the following circuit:Will this work as-is, or do I need some kind of MOSFET driver? Thank you.
A mosfet almost always fails shorted... but shorted drain to source. Nothing happens on the gate (which is what's connected to an Arduino pin.)
Why do mosfet circuits have "high power" gate drivers while in Arduino land everyone needlessly slows down the switching time by adding a gate resistor?Does this mean all the engineers are wrong and a handful of hobbiests are right? I don't think so.
Arduino pin specifications absolute max 40mA. MOSFET gates can handle amps, resistor keeps things in spec, good engineering.