Instructables
Have you ever gone to a Smiggle shop and saw the electronic erasers?
You unhappily go home thinking how much you want it and wonder how to get the money.
Well that dilemma is finally over! Make this cheap small pocket-sized electronic eraser and save up to $10!

This is a entry to the pocket sized competition.

Step 1: Materials

Picture of Materials
You will need:
- a small electronic motor
- a push switch
- a 3 volt small battery (energizer cr2025)
- 3 wires (short)
- The case (I used a i-mini white out pen)
- masking tape
-and an eraser (obviously)

Step 2: The case

To open the case, I used a small screwdriver to lever it open. Take out the gears and other things, and then you can use them in another project.
There will be a few poles coming out of one side and connectors on the other side. I used pliers to bend the plastic until it snapped off.
I then put the case back together and drilled a hole through the top of the case. Try to put the motor in first and see where to put the hole for the button.

Step 3: The electronics

The electronics will make it so that when you press the switch, the engine spins.
This is done by soldering a wire to one of the pins of the switch, for the battery.
Another wire from the other pin to a pin on the motor.
And a wire from the other pin on the motor for the other side of the battery.
Use some masking tape to attach the battery to the two wires.
When you press the button, the motor should turn.

If not :
-are the wires attached properly?
-does the battery have charge?
-Does the motor work
-Does the button work
-are the wires broken?

Step 4: Putting it together

Put everything in one half of the case like pictured below.
You should be able to just fit everything into it. Take the other half and put it over the top.
There will be a large gap between the two parts. Put masking tape around it to keep it together and tighten the screw on the button.
 
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rubberman75 years ago
this is so weird i thought i invented that idea 5 years ago! right now im making a more advanced one its going to be called electro eraser ill post it soon and please vote!
theres electronic erasers thats just lazy now
danm955 years ago
What's smiggle?
smeagle (author)  danm955 years ago
Its a shop that sells stationary that is very popular (smelly rubbers, electronic erasers, lava lamp rulers/sharpeners and ball through maze staionary)
http://smiggle.com/ is the website
danm95 smeagle5 years ago
oh, thanks for telling me ive never seen one.
amakerguy5 years ago
nice idea.... I think someone could do better. add a plastic case and less bulky
smeagle (author)  amakerguy5 years ago
It isn't very bulky, about 5cm long and 4cm wide
smeagle (author) 5 years ago
I changed it to eraser for less confusion ;)
keng5 years ago
oh......an eraser......ahhhhh.....see "rubber" means something different in the states and the pic didn't make any sense with that definition.....an eraser.....k, got it.
Javin007 keng5 years ago
Right there with ya.
Padlock keng5 years ago
Haha.. That's exactly what I thought when I first saw it.
Suggestion to the author: maybe replace rubber with massager or some other synonym.
Pencil erasers do NOT make for good sex toys. especially when it's a high-speed rotating eraser. Eraser(or at least "Rubber(eraser for you yanks)") is definately the word we are looking for here.
zuixro keng5 years ago
Yeah, I was confused too...
I was thinking the same thing!
Gypsyman keng5 years ago
yeah i was so confused about this....
nope, I was thinking the same thing as you
Yeah. I think rubber is the word they use in Australia. Perhaps the UK too.
camiller5 years ago
I have not seen an electric eraser since the time when draftsmen actually drew plans on paper rather than cad systems. Wonder if it would be possible to flatten the tip of the drive shaft so it would grip the eraser better. Nicely done.
A small dollop of epoxy in the eraser(Let it squish out a bit) or Superglue, should hold the eraser head just fine. When you need to replace the head, a little sandpaper should remove any last remnants of the old eraser.
Berserk875 years ago
ive never seen and electric eraser :o bit curious how well it works.
Staedtler makes one. It is sitting right in front of me on my desk. It's great for drafting work.
just did a youtube search for em, work very good for small areas. where a normal eraser removes a lot and would take a fair amount of effort to get the small errors.