Led Fader Christmas Cards

Step 4 Prepare The On/Off Switch

I devised a simple On/Off switch to help conserve the battery life and to make it simple for someone to use.  Using a paper punch square left over from step 2,  I cut a small 3/4" long horizontal slit about 1 inch from the bottom center.  I then created a pattern of smaller H shaped pull cards (see pictures) that were 3/4" wide at the center section and fold over tabs at each end.  At the top center of each pull tab I made a hole using a 1/4" hole punch. By folding the tabs over at one end you can slide it into the slit in the paper punch square. Folding the tabs back flat will lock it into the slit so that it only moves up and down.  When the tab is pulled down the bent LED lead drops into the hole and makes contact with the battery turning it on.  When pushed back up into the slit, the tab slides between  the bent lead and the battery to shut it off.