Instructables
Picture of Electromagnetic Pen
This pen-like object turns into a magnet, an electromagnet. How it all works: When a DC power supply goes through a coil of magnet wire, some of the energy is stored around the coil in a field. Introducing my first instructable: Electromagnetic Pen!
(Doesn't actually write. Just looks close to a pen) You don't have to use battery holder, you can use a bench-top power supply! 

http://www.youtube.com/watch?v=AERfL4Q5JJo   < around ten second video!
 
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Step 1:

Picture of
Tools needed:

Soldering gun

Solder

Helping Hands (optional)

Wire strippers

Wire cutters

If I use some tools not listed. I will post.



Materials:

Magnet wire (a lot)

Electrical tape

Steel rod (Mine is a 6 inch steel rod) Better if you use iron.

Heat shrink (just a little bit shorter than steel rod. The rod should slide through the heat shrink easily)

Small push button (momentary- Completes circuit when pressed) 

Battery holder (doesn't matter size. Just don't use a 9v or it will get too hot. Or use a desktop power supply)



Step 2: Wrapping magnet wire

Picture of Wrapping magnet wire
Wrap magnet wire around a lot until you are close to the edge of steel. Make sure there is bare steel on one end. Tape with electrical wire and leave some out around 5 inches.

Step 3: Center heat shrink...

Picture of Center heat shrink...
Center heat shrink next to the steel bar so that steel bar is barely sticking out.

Step 4: Place the switch

Picture of Place the switch
Find a spot for switch. You need it to be close to your finger. You hold it like a normal pen. Make a small hole for switch wires in the heat shrink. (You don't even have to put on a switch on the pen.)

Step 5: Make a hole for switch wires...

Picture of Make a hole for switch wires...
If you think it will short out, put heat shrink tubing around solder joints. Find the end with the steel that is poking out the farthest (this is the part of magnetic side on right) Solder an extra length of wire to opposite side with the bare steel side.  Make sure the wire sticks out, an inch or so, farther than steel. Do same with other wires.        (I'm trying my best to say this clearly. Sorry)
primeq1 year ago
what is the intended application of this? I can imagine some uses but am more interested in applications you had in mind
alpe_97 (author)  primeq1 year ago
Hello, thanks for viewing this instructable. I made this to help get parts out of my small parts bin. It is hard to get what I want out of it so I made this to help.
RSV262 years ago
u should rename it to E.M.P eletrical magnat pen!!!!
Kryptonite2 years ago
I'd love to see examples of general uses for this: wiping cards, hard drives, causing havoc... the usual!
alpe_97 (author)  Kryptonite2 years ago
Well, It is not very strong but when you have bigger steel rod and more current, the stronger it will be! (Not for use to delete memory off hard drives! hehe)
Oh, but of course!
;)
killbox2 years ago
wonder if you up the gauses and perhaps make a point at one end (perhaps use a screw or nail in the end) if one could draw patterns on steel, and then get metal filings to stick.
mrmerino2 years ago
The next logical step is to create a functioning pen with an electromagnet concealed inside....

I can almost smell the mayhem.
I'm not so sure I get the point of making an electromagnetic pen, but I really like the white board as photo background technique! It let's you add notes and arrows, and as much text as you can fit in the photo. Brilliant! I'm going to use that technique on an 'ible one of these days.