Tag Archives: robot

Three fast, easy and cheap geek projects!

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I’m excited about this entry, because it’s a whole bunch of really fast, really easy and really cheap projects for the beginner geek in each of us.

None of these are quite easy enough for a child to do on their own, and at least one part of each of them should have parental supervision.  Which is a good thing, because it means more time working on something together.

These are the three projects: Hover-crap, Bristlebot and Slurpee Cup Lamp.

Hover-Crap

  • Time: About 2 minutes
  • Cost: Pretty much made out of garbage, so close to free
  • Most difficult part: Using a hot glue gun

The Hover-Crap comes to me out of making lemonade from lemons.  During the May, 2010 Woot!-off, I got the most generic, monetarily worthless junk in my Bag of Crap.  Which is not a bad thing. Quite the opposite, in fact, I look forward to it, so that I can find useful stuff to do with it … Like this.

One of the items (or six, depending on how you look at it) was a six-pack of Disney Flix Camera Cinderella Director Packs. It’s a whole mouthful to say: worthless CDs.  They’re software add-on packs for the Flix Camera, and absolutely, completely worthless without it.

I wondered if there might not be something useful to do with them, and Jeus linked me to a YouTube video.

Follow the YouTube link above, and that’ll show you everything you need.  Basically, a balloon, a CD, the push-top lid of a sports bottle from a bottle of water and some glue.  The video suggests super glue, I like a glue gun.  I always have problems with super glue and walk around with my fingers glued together for a few hours after I finish with a project.

Most of the 2 minutes of this project is opening the bag of balloons, choosing a color and blowing it up. I decided to color-coordinate with pink.  In a refrain you’ll hear a lot from me in my projects, I picked up the bag of balloons at the dollar store (Dollar Tree this time), and you really shouldn’t be paying more than a few pennies per balloon.

The result:


I’m happy enough with it!

Bristlebot

  • Time: Between 5 and 10 minutes
  • Cost: About $2
  • Most difficult part: Soldering two wires to a motor

The Bristlebot was brought to me for the same reason as the HoverCrap. In my Woot!-off Bag of Crap from May, I also received five button-cell CR2016 batteries. Oddly enough, if they had been CR2032s, I would have had a use for them and wouldn’t have gone looking.

Do not solder wires directly to the batteries. They will in all likelihood explode.  In the non-cool way.

Anyway, I ran across one of the coolest-yet-quickest projects on the Internet: The Bristlebot.

Here’s what you need:

  1. Any 1.5v to 4.5v button cell battery, like a CR2016 or CR2032 watch battery (I found a 3-pack of CR2032s at the 99¢ Only Store)
  2. A toothbrush with slanted bristles that you don’t mind mangling
  3. Masking tape
  4. Two bits of wire
  5. Solder/soldering iron
  6. A miniature vibrating motor

This last item is the hardest to come by. Everyone on the Internet says to get them out of old cell phones or vibrating pagers. That would work, but who actually has those lying around? (Okay, I do, but I’m odd.) So eBay may be an idea, but the people on eBay have caught onto the idea that people are using these for Bristlebots, and they charge about $3 per motor. I had great luck with allelectronics.com.  They have multiple motors that fit this bill for $1.25 currently. (I wouldn’t go for the $1 one, as it looks like it would need to be mounted on-edge to get the vibration necessary.)

Here’s a picture of the motors I bought, a two-pack of angled toothbrushes from the dollar store (I later found four-packs, so just 25 cents each for this part of the project), and what I was hoping would be a fantastic steal, a vibrating toothbrush.  I figured it would have a vibrating motor in it, and it did, but it turned out to be HUGE. (Note: If you can get the unbalancing weight off it, this motor is PERFECT for the BeetleBot project … Which I’ve completed, but haven’t written up yet.) It also came with a battery, making it almost as good a buy as the personal fans I bought there to get the motor.

The blog I found the project on tells you to use double-sided mounting tape to mount everything to the top of the toothbrush head, but I found that a half-strip of masking taped worked fine … The double-sided mounting tape I found was about $3.50, and that’s about $2.50 more than I was willing to spend.

Anyway, just follow the directions in the Bristlebot link above.  Mostly I’m just pointing out where you can get things.  Oh, and showing my results video:


I LOVE THIS THING!  How cool is that?  The back of my Bristlebot has raised bristles, which adds to its random nature and spinning around.  If yours does the same thing and you don’t like it, just trim them all off flat.

Slurpee Cup Lamp

  • Cost: Anywhere from about $7 to $30
  • Time: 15 minutes
  • Most difficult part: Using a drill (on some) and hot glue gun

This project comes to me from my sister Brooke, who has her own geek blog over at http://psyfygirl.blogspot.com/.  It’s TV Geek Girl Chic.

She made one of these out of a collectible Slurpee cup with a Darth Vader lid.  Obviously with that one, there’s no need to drill a hole in the top, but you still need one in the bottom.  Also note that collectible Slurpee cups had harder lids in 2005 than they do now, so maybe look around for something else to use.  Old Coke bottles (like they still sell Mexican Coca-Cola with real sugar in) or interesting wine bottles would work, and is what the lamp kits are for, but I wouldn’t want to be the one drilling holes in the glass.  But there’s really no end to what you can do this with.

Here’s what you need:

  1. Bottle Lamp Kit — I found one at Walmart for $3 or $4.
  2. Collectible Slurpee Cup, bottle, etc. (you’ll see the one I found below)
  3. Lamp shade (K-Mart has smallish ones fairly cheap)
  4. Hot glue gun
  5. Probably a drill

Really, all you really need for this is to drill holes in the bottom of whatever you’re using, the top if necessary, seal things up with the glue gun, and following the directions that come with the bottle lamp kit.

In about 15 minutes, here’s what I made for our son’s nursery, and yes, that’s actually a collectible Slurpee cup.  (He’s due in ten more days.  Could be any minute, now!)

Welcome to Good Idea at the Time!

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This is a pretty good day for my first post, because it’s a good “projects” example day.

First of all, how cool is this domain name?  Completely shocked when I saw it was still available.  I’ve been thinking for a while to start two blogs, one for geek projects (name never determined) and one for my bad parenting (called worseparenting.com).  I have no idea what badparenting.com used to host, but it’s a domain squatter now.  When I found this domain available, I realized it could be used equally well for both blog ideas.  Feel free to take worseparenting.com and make me look like the amateur I am at being a bad parent.

My project for today (and yesterday, and now tomorrow) was supposed to be a Beetle Bot.  This should be a one-evening project.

The lesson learned the hard way last night was: Do not use Bondo to hold your beetle robot together.  Feel free to rebuild a Volkswagen Beetle with it, instead.

Tonight, I couldn’t even get to the project until much later than expected. As I was closing and locking the door of my car, the door’s lock fell inside the door.  (Yeah, I A) have manual locks and B) have to lock the car door from the outside using the key, by manufacturer design to ensure I don’t lock it in there.)

On the bright side, I’ve always wondered how hard it is to get inside a car door, with how entryless (not a word) their construction seems.  Now I know.  I also know that it’s not getting into the door that’s the hard part.

A while ago, I had one broken bolt in that car cost in the neighborhood of $600.  It appears to have happened again, but this time it cost me around $1.50.  (I don’t remember how much, but I know I used a credit card to pay for it. So I can find out exactly how much later. See how I totally paid for a $1.50 item with a credit card on purpose and not because my brain gets easily fried?)

Anyway, that set my robot building back an hour and a half.  I’d picked up the epoxy and this time I got the robot entirely built … But discovered I should have done more testing first.

See, the smallest motors that allelectronics.com sells are 1.5 Vdc mini, mini, mini motors.  Which is great, since the Beetle Bot Instructions calls for 1.5 Vdc motors.  Except that they’re ACTUALLY 1.5 Vdc, and most AA and AAA batteries these days are closer to 1.3 V than 1.5.  So I could power one motor, or the other, but not both.

Solution?  Like so much else in the world, the dollar store. They had little hand-held personal fans that have the proper 1.5 Vdc motors that will (hopefully) work with slightly underpowered batteries.  Also?  They have cool little mini-frisbees in three or four packs (depending on which comic book character you want on them) which are perfect for the top shell to these Beetle Bots.  So much great stuff there to break to pieces and abuse.

So in one night, my project count is:

  1. Unexpected car project
  2. Failed robot project
  3. Domain purchased, blog created, and premiere post put up!

Even though it’s taking me past midnight to get all this done, at least I get to end on a success.  Looks like the Beetle Bot and the Bristle Bot will have to end up being weekend projects.