Tag Archives: GoPro Hero 3+

Halloween 2015: Yet Another Talking Skeleton

Choosing a theme for Halloween is an annual challenge. Time constraints in recent years have tempted us into punting; at least to the extent that our theme becomes diluted into “do something scary.”

Technology is often the catalyst. We started off decidedly low-tech with the purchase of a sharkstooth scrim remnant. We had enough material to cover the doorway or a large prop, but using the scrim requires control over lighting near the house.

Scrim can be made opaque by shining a light on it at an oblique angle. By changing the lighting, the scrim can be made transparent; thus, revealing the area behind. To get the lighting right, you pretty much need to start out with complete darkness. Streetlights near out house make that difficult.

The solution (as if this were a problem requiring a solution) was to stretch the scrim vertically. We were then free to hide something scary above the heads of the unsuspecting trick-or-treaters. That scary thing would be a talking skeleton.

We already owned a skeleton with a servo controlled jaw, but it is heavy and advancements in skeleton technology using space-age lightweight materials made the purchase of a new skeleton an imperative. This made hanging the skeleton easier. Hanging the scrim required building a steel frame around the porch. That took way too much time.

The lighting could have been controlled in a number of kludgy, hacked-up ways, but it seemed like an investment was in order. Since we try to make the display as interactive as possible, we decided to buy VenueMagic, a software show controller. VenueMagic makes it very easy to add lighting and music cues that can be triggered by pressure mats and light beam sensors.

The triggers were attached to the 90’s era Maris hardware show controller we got off eBay a few years ago. The Maris is a pain in the butt to program, but it is easy enough to make it send a MIDI message when a trigger is tripped. VenueMagic uses the MIDI message to cue lighting on the stairs, sound effects and ultimately, the skeleton gag.

We also got additional amplification providing four 200 watt channels of audio. The dialog, music and sound effects were mixed into three channels. The dialog starts at the center channel then is spread to the side channels after a thunder and lightning cue. The thunder was set to “maximum impact” volume and that took out the small speakers in the yard. The speakers were replaced just before the witching hour.

We still had one channel left. At the last second we decided to add a cat screech next to the stairs. The cat, which took less than an hour to setup, would become the big scare of the display.

We had about 220 kids this year – a little less than last year. The display ended up being more fun than scary and the entire experience was less than a minute long. But we had fans – a pack of little girls who visited so many times that they ultimately tried to scare us. That made it worthwhile.

Halloween 2014: Giant Floating Eyeballs

We’ve been offline for a while now. Two repairs of the laptop requiring shipment back the Asus slowed our video editing efforts. Watch in amazement the 63 seconds of video above.

We last presented the Giant Floating Eyeballs back in 2009. Soon after its completion we started redesigning it, knowing we would use the idea again. It was one of our most popular displays.

Several years ago, we bought a new video projector – one that would have a 1:1 ratio throw (the image width is as wide as the distance to the screen). The projector was going to be used for another project, but we knew it was the solution to greatly simplifying the eyeball system.

By using the short-throw projector, we could get rid of the weighty mirror. The entire assembly was shortened to five feet and a plan was made to allow the entire rig to pivot on a center mount. Note the word “plan.”

The entire thing was balanced out so that the frame could move in three dimensions. There was some consideration for adding a motorized arm to push the screen to and fro in an effort to give the eyes more life. Ultimately it was decided that the wind would be enough to give a eyes motion. Bungee cords were added to make sure the thing didn’t take flight.

No one seemed bothered by the eyes looking bolted-down in the completely windless night. We’ll add a motor to version 3. And change the animation. And lower the brightness on the projector (it looked a bit blown out). 2019 will be a great year.

The response this year was as good as it was five years ago. A new crop of kids has grown up and most of the 242 kids that came to the door were able to see something shiny and new. We had a request from one parent that we wear costumes as festive as our decor. We’ll take that under advisement for next year…