-
Dadd1e90 9532 4c50 8698 9b2aa3ee8521

invention

"Creep-er-Treat": Life-size Minecraft Creeper giving out candy to Trick-or-Treaters!

by mmalpartida

Published on November 2, 2016

Last year we made a creeper that scared kids and since then he has grown and wants to make kids happy with sweet treats!

My daughters came up with the idea and it turned into a family project!  It was a hit and the neighborhood loved it!

Duration: 8hrs (trial and error)

How To Make It

STEP 1 : Sketch out idea

We drew it out first on paper, and then figured that it had to be much bigger than last years version; especially if it was going to throw up candy on the trick or treaters!

STEP 2 : Build Skeleton

24acb6b9 4568 49af 9218 23d9532fa93b

8589ece4 741c 42cd ab60 94cfbf11e9ad

16cb5dfa 06c1 47fd 90ee 784f879e954c

A4708dea ad80 4a65 af23 6d09f4c49c21

3f053cd8 1699 40c7 9f1e 135ff26d2f99

Since we didnt really know what we were doing we ended up using PVC pipe because its cheap and easy to cut without much mess. To make it mobile we screwed it into a cheap dolly and added a sheet of plywood to make it completely flat. Then we secured the bottom of the creeper frame to the board as well. The other good thing about PVC is that you can completely take it apart which makes transporting easier. We used 3/4" diameter which is strong enough for this application, make sure to get the thicker kind. Didnt know they had thicknesses so make sure its not paper thin which could affect the stability of the structure. The rear is designed to be a shelf for future components like a computer or candy storage area.

STEP 3 : Build Circuits

D7939af9 55e8 4531 9fc6 d5c4b4a08e41

F4371012 198f 4a14 a16b 4e69e8022c77

19b170ba 5246 473b bbc6 6309ba3d722f

So with our initial concept the creeper needed to do a few things: 1.) Make sounds 2.) Eyes light up 3.) Dispense Candy So for the Remote to control all this we used: USB POWER > FORK > BUTTON > WIRELESS TRANSMITTER For the receiving end: USB POWER > FORK > WIRELESS RECEIVER >(channel 2) > TIMEOUT > BRIGHT LED > WIRE > DC MOTOR > SPLIT WIRE (1 side to next motor with other to lights) > DC MOTOR > (WIRE x2 > LED x 2 for the eyes) WIRELESS RECEIVER (channel 3) > MP3 Player > SPEAKER > SPEAKER (I salvaged 2 speakers from a tv I found in the trash and they worked great with the bits) OPTIONAL: We also made a flap that could help push candy which kinda worked using: USB POWER > WIRELESS RECEIVER (channel 1) > PULSE > INVERTER > SERVO > INVERTER > SERVO To get the servo arms to quickly shake we used the pulse bit. To get the sero arm positions moving in the direction we wanted we used inverters.

STEP 4 : Build out candy dispenser

60bd9b3a c661 4cb8 a42f 3176d18b763c

1938c3f4 1557 4a98 952b 79a74377136a

Adf94874 a88e 4175 9298 425c6d5e85e4

F2dda076 3ea2 43ea 87d1 111605a9166a

Dde05642 4cfa 4605 a56e 065845764335

0b0802e3 f0b7 4cde 8eed 6acaf5946d35

Cc7a3bb7 3135 49a8 ac35 293c6711694f

702dfb9b 8237 43d8 9a2b fdf856b3f299

We went through many iterations on how to actually dispense the candy. The challenge was to restrict ourselves to primarily using the bits we had without modification all while keeping it as simple as possible so others could replicate. We tried using a couple of lego bulldozer scoops attached to a large gear and that kinda worked but was not strong enough when the candy was fully loaded so we went back to the drawing board and came up with using a conveyor style system which ended up being more reliable. To help the conveyor out we added nubs to the tracks at various intervals to help move the irregular shaped candies along.

STEP 5 : Test and troubleshoot

We failed many times with different candy feed mechanisms until we came up with one that worked most of the time. The great thing is that since we used cardboard and PVC for the structure is that its easy enough to pull out the whole unit and try out different ideas.

STEP 6 : Build skin

0f203538 4d10 44f1 92f7 3938d1a84572

08c8c3ae 211c 4de4 94fb 01ef61e27d91

0b1c5d77 78af 4714 8479 84feda2b897e

A71244df 88a5 4913 a75c bcbd76ba1808

Caada492 74e2 4a0e 9fa8 322657e7dd1f

Ab1bb8fa e30d 487f 9539 b020f0923a11

Dcfa5c79 ede5 47a2 ae73 e77603094a39

3e3ef893 8c71 4946 865c 39ee3e897be6

Using cardboard and scissors/xacto knife we cut out the skin. Next we painted it with spray paint After it dried we attached the pieces to the skeleton with Velcro so we could disassemble for transport and troubleshooting. Finally for the face we cut out the shapes for each area out of clear plastic (the kind you get on toy packaging). Next using black nylon leggings we stretched and hot glued the nylon to the plastic and then the finished pieces to the face plate. To help flatten out the hot glue we used the wax side of the used up Velcro strips as it wouldnt stick to the glue but any wax paper should do.

STEP 7 : Test again

A2c7fa2c 3d0c 446d 8852 808d331a31f1

5ba78b7f ba29 42f9 980f e70bd91cc995

Now test the whole thing again and make any adjustments now that the skin is on. We ended up having to add some more cardboard to the mouth area as candy was starting to get stuck at times. OPTIONAL: We had added a GoPro camera to the nose but didnt end up using that since it was too dark for what we wanted.

STEP 8 : Trick or Treat!

E6c0a251 916b 43a4 b1a5 54d2586fb51d

Bring out the creeper and setup a table with an optional bowl to catch the candy. The lights on the table are a separate project that I will post up, but basically its an IKEA cabinet door with glass, carboard, Arduino bit, Proto bit and a NeoPixels compatible light strip (60 lights)

Related Projects

LittleBit of the Universe

5...4...3..2...1...Get ready for Blast Off!! Welcome to the journey through our Universe of littleBits! Watch as the shuttle ...

Github Issue Creater

When You Press a button Makes a issue!

Backpack Turn Signals #hackpack

#HackPack These turn signals are great for riding your bike and walking down the hall way.