I stopped by Ace Hardware last Sun and spotted this cool
parking target. In addition to definitively knowing when to stop when you drive over it, I figured why not mount a switch in it.
So I picked out a normally open push button switch, Ace part number 1904U. Barcode 039008774064.
Needless to say, you'll save some time if you have the right size drill bit before you start this project. I didn't so a "carved" my hole with a smaller bit and a blade. I do strongly recommend that the switch fit snugly. It will make installation easier later. Try it from above first. The hole needs to be centered along the length of the parking target and
1/
4 of the width of the top from the top edge. (1cm) As you see from my "light at the end of the tunnel" picture, it wouldn't work to center the hole due to supporting center piece of the parking target.
Discard the hex nut that comes with the switch. It's useless for this project. The next step is to screw one of the knurled nuts on the switch. This and the star washer you place on top of it serve to space the switch for a near flush pushed position when you drive over it.
Use wire nuts to attach wire to the switch. (I skipped pictures of the wire nuts but figure anyone that has installed a few X10 light switches has seen plenty of wire nuts.)
Now it's time to get the switch in place. First check your hole from above. Then recheck the wire nuts to make sure they secure. It wouldn't hurt to test the switch also. After the switch pops in place, it's not coming out easily.
With all but the top nut in place, push the switch and slide it into the chamber of the parking target. It will be a snug fit. use a long screwdriver or 10" stick to push the switch in place. When the switch finds the hole it will pop in place. If your hole is snug, you may need to use a padded pair of pliers to pull the switch in place. A snug fitting switch at this point will make it easy to screw on the top nut.
One possible down side of this is that your drive in has to be a bit more precise to hit the switch. At less than $15 for my solution verses more than $100 for a tape switch, I can live with that.
They say a picture is worth a thousand words so I hope these will help clarify things.