Thanks @shashvat. Those are the only 2 pictures I took, but they are big and you can zoom in to see a lot of detail. Click on the picture, and then click on it again to see it in it’s original size.
Here are some tips on doing this with a microswitch:
Use a thin and small microswitch like the one I used from Radioshack so that it fits within the turn knob’s housing. Take the housing with you if needed to make sure. Notice in the second picture where I had to use a plastic spacer to make sure the switch made good contact on the barrel.
Rotate the knob all the way to the locked position and tape it that position so it doesn’t move on you while placing the switch and the high tech piece of toothpick on the barrel.
Hot melt glue is awesome for a little project like this. Be careful not to get glue by the switch’s hinge or button. You want smooth operation.
Give yourself plenty of wire to work with, and don’t go too thin. You can accidentally cut the wires if you put the housing back on too tight. The extra wire you give yourself can easily be tucked away.
As @kevin said, the sensors that work best are the ones with screw terminals inside. The sensors I know of like that are Monoprice, GoControl, Ecolink, and Schlage. You could use something like an Iris sensor by soldering wires too where the reed sensor is, but that’s a lot of work in my opinion.
I believe there was a question about that somewhere in the Community in another discussion, and the answer was yes you can, and yes regarding the DH. Let me do some searching and I’ll post back the link as soon as I find it. Be right back…