This video might be useful to you if you are using the same type of PIR.
All of the examples have been moved to a separate repository.
You might find fix here.
RE: Led dimmer sketch, voltage drop?
The IRFZ44N is not a logic level mosfet. A pro mini 3.3v will not fully open the gate.
I had the same issues so I went with a IRLZ44N and it works great.
Can this be expanded to include 2-3 more outputs?
You have to install the files manually.
Has anyone successfully extended the dimmable LED Actuator sample sketch to more than one LED?
I have been trying to convert my old 1.3 sketch to 1.4 or extend the new example to more than one led but I have not got it to work.
Btw been using this since I first saw it on Mi casa verde and love it!