Doorbell Case

Final face plate with Nest Hello protective rubber cover .

The holes are as follows:

• Four holes, in the corners, hold the face plate to the box

• Top center is for the camera.

• Two left, middle smaller holes are for the speakers.

• Small hole in center is not a hole but part of the box

• Small hole in middle right side is for microphone

• White looking hole if the motion sensor

• Hole at the middle, bottom contains a Blue LED push button

Step 3. Create a Template

Lay everything out using stiff cardboard and use this to create a template (see Prototype Cardboard Case).

The image shows the final drilled holes on top of the template.

I also tried creating a see through template using plastic and a sharpie.

This seemed like a good idea, but paper and pencil was easier. I held up the paper to a window to reverse the image and lightly traced with a pencil.

Step 4. Trim Posts

On the left is the original face plate of the box. There are four remnants of the plastic manufacturing process. These are the four inner posts and the little button in the middle.

Don't touch the four posts in the corners.

Use a dremel with a small flat grinder bit to cut and remove the posts and then grind down to the surface.

On the right is the face plate after the posts and buttons have been removed.

Step 5. Locate center of holes

Make a copy of the template. Cut out the corners for the screw posts. Trim the copy to fit; align within the faceplate as shown; tape the template in place; and then using a 1/4 drill bit mark the center of the camera hole by poking through the template into the face plate.

Repeat the above for the push button, motion sensor, speakers and microphone.

On the left is the original face plate of the box. There are four remnants of the plastic manufacturing process. These are the four inner posts and the little button in the middle.

Drill bits and holes:

• 1/4 inch = push button

• 1/2 inch = motion sensor

• 5/16 inch = camera

• 7/32 = speaker holes

• 1/8 inch = microphone