Category: MakerBlock

All things MakerBlock: RepRap, MakerBot, Cupcake CNC, open source, and plastic building toys!

Young whippersnapper!

Get off my lawn!

Cyrozap suggested a Kinect could help a ‘bot someone stepping on the lawn.  I don’t think it would be extraordinary to build something that would aim and operate a hose.  Bonus points if I could get it to look like either (A) a scary sentry robot or (B) a big Santa Claus.  Ideally, it would offer a warning, “Hey you kids!  Get off my lawn!”  And then a warning shot, just a wide spray – not intended to actually soak anyone.  Then, if that doesn’t work – a directed spray.

And, then, well, there’s always the nuclear option.  The ‘bot could turn on the sprinklers.

Open questions for anyone familiar with Arduinos

And, I’ve got several.  I’m not entirely sure what I’d end up using an Arduino for – perhaps making tiny silly robots.  However, there are so many choices and not a really good way to differentiate among them.

  1. Chips
    1. There appear to be several.  From my friend Google, I understand that the “ATmega328” is significantly better than a “ATmega168” in terms of double the flash memory, RAM, and baud rate.  But, I also see “ATmega328P.”  What’s the “P”?  Is it important?  Does it mean pre-programmed?
  2. Power
    1. I’d like to be able to run whatever Arduino variant I end up with from a variety of power sources.  It’s my understanding that a preassembled Ardunio has that capability – accepting between 5V that could be supplied from USB to 9V from a typical 9V battery to a 9-11V AC power adapter.  If I build a MintDuino, will it only run from a 9V?  Would it run from USB if I use an FTDI cable or an FTDI Friend?
    2. Wait, I may have answered my own question – I’m guessing that a Breadboard Voltage Regulator Kit would be needed to run a MintDuino from a variety of power sources.  Is this the case?
  3. USB
    1. I have an FTDI cable from my Cupcake CNC, so I think I could use that with any kind of board that doesn’t have a USB port.  Having fiddled with an FTDI cable a bit now, I don’t have any preference whether my board has a USB or FTDI interface.  Is there any reason I should?
  4. Programming
    1. Are all of the *Dunio variants identical to program?  I seem to recall reading that the NetDuino is “.NET”  I’m not sure what that means, but I’d prefer to use something that utilizes the Processing environment – if for no reason other than I could use what very very very little processing I was exposed to when fiddling with my Cupcake’s temperature tables a million years ago.
  5. What should I start with?  Please assume I know nothing about electronics, Arduinos, electricity, computers, programming, or things that rhyme with “minternet.”
    1. It’s hard for me not to like the MintDuino package.  A small breadboard, a little tin, some parts, no soldering.  The Mintronics Survival Pack seems interesting too – again a little tin. 12  Is the “Survival Pack” useful?  Useless?  Kinda useful?  It looks like it has a small breadboard, some LED’s, wires, 9V battery clip and wires, etc.  As I understand Arduinos3 , they can accept a variety of voltages.  Will a MintDuino do the same?  It looks like I’ll need an FTDI cable, which I have from my Cupcake, so I’m not overly concerned about this limitation.
    2. Should I go with a fully assembled Ardunio like the Uno, a breadbord kit, or a kit that I solder together?  I’m leaning towards a breadboard to start for simplicity’s sake.
    3. Should I go with a Sanguino, Ardweeny, Arduino Mini, Arduino Pro Mini, Ardunio Mega 2560, TinyDuino SB, Sippino 328, FreeDuino, DC Boarduino, NetDuino, NetDuino Plus, NetDuino Mini, Ardunio Nano, or RBBB?  If so, why?!  Can you understand my choice paralysis here?
  1. I like tins. [↩]
  2. Then again, I’ve got a robot that can make me plastic tins, so they’ve become less fascinating to me. [↩]
  3. Which isn’t much [↩]

The darker side of copyright

I know it’s cute to have your word processing program auto-correct “(c)” into “©” … but why? 1  It is FAR more common for me to see “©” in correspondence when someone means “(c)” than for me to see “(c)” when someone means “©.”  In fact, “©” when you mean “(c)” looks stupid and “(c)” when you mean “©” actually makes sense to me.  Then again, I don’t know why you wouldn’t just write the word “copyright” instead of trying to find the symbol “©.”

In any case, given how infrequently the “©” symbol is used in common parlance, why would anyone ship software to include this auto-correct?  If it were really that common, we’d have a key for it on the keyboard.

  1. Original title for this post:  “This post has been brought to you by the letter ‘C” [↩]

Founds parts

I took my daughter to the library yesterday1 and they were having a huge book sale.  I’m such a sucker for a used book sale.  Some of my most cherished books were previously cherished books.  :)  While rummaging through the books I found one that was a children’s board book with a list price of $20 that had about a dozen pages with colored musical sheets – and a simple electronic piano at the bottom, circa 1998.

What surprised me about the electronic piano is the number of keys it has.  Most children’s toys that incorporate an electronic piano have about 13 or so keys.  This one has 23.  You could actually play some music with this thing.  The speaker area was SO big that I knew it had to be a conventional magnet + copper coil speaker rather than a cheap piezoelectric speaker – the kind you find in annoying greeting cards.  When I held it to my ear and hit some keys, I could just barely make out a tone over the low din of other book lovers milling around.  At $0.50, I SNATCHED it up.

Here’s my plan.  Rip the entire plastic piano off the board book, replace the batteries, rip out the old speaker, replace with a cheap piezoelectric speaker from an annoying gift card, and turn it into a very tiny piano.  It’s not going to change the world or anything, but it is a fun little project.

I’ve already stripped it off the board book, replaced the batteries, and tried out a piezoelectric speaker – only to find out my piezoelectric speaker was broken.  :/  I’ll have to find a new one.  The piano is surprisingly loud – but my daughter got a kick out of it.

  1. As in about 10 hours ago [↩]

Hello Coffee my old friend

In an effort to get out the door for work on time yesterday and then to a meeting a little later I skipped out on getting coffee, which left me caffeine deficient until about 30 minutes ago.

Why this sometimes seems like a good idea is totally beyond me.  I’m addicted and I should really just come to terms with that.  I’m just a nicer, better person when properly caffeinated. 1 2 3

At the local coffee spot I stood in a line of zero people while waiting my turn, still with my sunglasses on from being exposed to the harsh bright light of a Bay Area sunny morning.  The barrista beckoned me forward and I handed him my empty travel mug and credit card.  “A lot of coffee please.”  He filled the mug, charged my card, and asked if I needed the receipt, which I declined.  At least, that’s how it was supposed to go down.

Small coffee?

Huh?  What?  Um, n…

Well, I’ll fill it up, and charge you for a small coffee.

Oh, okay… thank you.

Do you want me to rinse it out?

Uh, wha… no…

Room for cream?

Um, yeah, thanks.

Okay, great!  Credit card?  Do you want the receipt?

No, thanks.

The above is actually a very normal transaction, but in my drug dependent state it was terribly confusing and disorienting.  I felt like a kid left a train station as an engineer asks me questions about where my mommy and daddy were as I try to answer with my mind trying to work out the discrepancies between my current dilemma and the directive to not speak to strangers.45

  1. And a grumpier, surlier person when under-caffeinated. [↩]
  2. And a frenzied frantic inspired person when over-caffeinated. [↩]
  3. It’s a fine line. [↩]
  4. Mom, dad, if you read this…   please come back!  I promise to eat my veggies.  I miss you! [↩]
  5. The train station wifi is terrible! [↩]

ProfileMaker: More than 209 profiles and 58 people served!

More than 58 people have generated profiles with ProfileMaker1 !

Seriously, you need to stop printing calibration cubes and fiddling with Skeinforge.  Find out more than 58 people have discovered and start using ProfileMaker to create your Skeinforge profiles.  You can either manually enter the values provided by ProfileMaker into Skeinforge or have it e-mail you a ready-to-slice Skeinforge profile.

Always wanted to try printing at 0.25mm per layer or with 1.75mm filament or in PLA?  Your ‘bot can do it.

  1. Powered by SCIENCE! [↩]