[Captain_hook]

Hey there across the pond. I'm from Australia.
Most people down here don't celebrate Halloween, but we sure do at our house.
Here is a video of my monster in a box. it is controlled with an Arduino. Has four pneumatic cylinders for the movement, a hacked MP3 player so it can be controlled by the Arduino, and a set of computer speakers with a subwoofer for sound.

 

[ice456789]

In the video the pneumatics are almost silent, or are drowned out by the sound of the box moving. How did you get it so quiet?

 

[DaveintheGrave]

Nice job! I love the monster sounds.

 

[Trex]

Looks great, nice work!

 

[punkineater]

Great build~love the herky jerky box motion, very realistic!

 

[Bluzman23]

Great Job!!

 

[Captain_hook]

In the video the pneumatics are almost silent, or are drowned out by the sound of the box moving. How did you get it so quiet?

I slowed the cylinders down with flow control valves, I also put nylon "feet" on the cylinders to quieten the impact with the ground and I took apart all the cylinders and put rubber washers that I cut from an old tyre tube at each end of the cylinders.
I also spent quite a bit of time "timing" the cylinders with the soundtrack to help hide it.

 

[mtairymd]

Love it...nice job!

 

[MummyOf5]

This is awesome! Made me think, the kids had bumble balls when they were little. If I can find them I could put them in a cardboard box and have a low-tech version