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When you try to write with it, it will let out an annoying beep, and chances are, no one will know where it is coming from! This is ...
First, you need to gather your parts. Get your hands on a whiteboard marker, a piezoelectric buzzer, a AA battery and a mini tactile switch.
In order to assemble the pen, you will need some wire (fairly small gauge) and some solder. Flux is optional but I recommend having it on hand.
Get your tools ready! You need a set of wire strippers, wire snips, needle nose pliers and not shown but the most critical tool, a soldering iron.
Remove the back cap from the marker to access the inside with your pliers Then use your pliers to remove the ink cartridge from inside the maker (you can toss ...
Now you need to dry out the felt tip so that it will shrink and slide freely in the tip. I found that the most efficient way to ...
Now cut a piece of wire about 3 1/4" long and strip 1/8" from each end.
This is where you really need to pay attention. Begin by cutting two pins off of the button diagonal to each other THE LONG WAY, and then bend ...
Now we focus on the most important component, the piezoelectric buzzer. Melt a glob of solder to the negative terminal of the battery, and while it is still molten, attach ...
Now all you have to do is slide the whole assembly into the marker with the button facing the writing side of the pen, slide in the felt ...
Now all you need to do is put it on your teacher's board and wait for them to use it!
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