The challenges are:
* Find a small magnet
* Find a clean way to attach the magnet to the cover.
Step 1: Supplies
What you'll need:
* a magnetic business card -- I get so many of these from sales people
* black electrical tape
* post it note (to help measure)
* and your non smart iPad2 cover
Step 2: Measure and Position
The tricky part is to find the correct location of the sensor. I did it by experimenting, moving the magnet piece up and down to see if it triggers the sleep function. The correct position seems to be around the second row of app icons, when the display is in portrait mode.
Post it notes are my favorite tool to make measurement since it is sticky. I Place a post it note sticky side up next to the magnet position, close the lid and wrap it around. Now I have the correct position marked on the inside. Then I open the cover and ready to attach the magnet piece.
Step 3: Attaching the Magnet
I simply trim a small piece of black electric tape and taped it down.
Step 4: Testing