Archive for the ‘Arduino’ Category


Folding Dodecahedron

A couple weeks ago, after months of trials and tribulations, I finally got a fully folding/unfolding prototype of a dodecahedron. I experimented with a plethora of materials and actuators ranging from paper and nitinol wire to copper and dc-motors, finally settling on acrylic and servos.

Now… what do I do with this thing?

Dodeca Servo from geoff riggle on Vimeo.

Phase One – Reception

The lights were fading, the cheesecake was being consumed, and we had pretty good turn out considering it was the last week of classes. Thanks to all who made it out. Here is a short video thanks to Christian. Check out more vids from the reception on his page.

Spatially Sensed Experience: Phase I

After an exhausting week of moving, litterally, tons of bricks and buckets of water, Spatially Sensed Experience: Phase I is now on display in Hiestand Gallery, ready for your viewing/experiencing pleasure until May 8th. The opening reception is Thursday, April 30th, from 4:30pm to 6:00pm.

If you aren’t able to make it, enjoy the live feed courtesy of my cohort:


Ring, Ring, Tick, Tick, BOOM!

This is for a friend of mine’s ( Joshua Foy) thesis ceramics installation who’s show opens in a little over a week. His recent thesis work has focused on political ‘hot-topics.’ We collaborated on a simple way of allowing viewers to interact with one of his large ceramic wall pieces which references the use of IEDs (Improvised explosive devices) in the middle east. The idea is that a pre-paid cell phone will be located in the suspended ceiling of the gallery which the audience will be able to call. When the phone rings, it will trigger the sound of an IED initializing and exploding through speakers also hidden in the suspended ceiling.

Here, I’ve taken a Piezo Buzzer and used it as an analog input device to the Arduino. I needed to ‘trigger’ the sound of an IED by picking up the vibrations of a ringing cell phone (a common means of triggering explosives in guerilla warfare). I used a simple Processing sketch to playback the .wav files.

Ring, Ring, Tick, Tick, BOOM! from geoff riggle on Vimeo.

Columns Test Install

For my critique last night I setup two sets of the columns/pods for the gallery installation that goes up in about one month. We are still having difficulty with the timing of the fades but I’m working on that. Each column is constructed out of kiln bricks and has a 100 watt flood light located in the bottom. PIR sensors, located in the bottom of the larger columns, are tripped when viewers walk by triggering which column/pod is lighting. I have enough electronic components and brick for four sets (4 large and 4 small columns). I’m not sure now if we will utilize all these. I think each set can possibly command a lot more space than I am currently invisioning.

Here’s a video (I’m walking back and forth out of frame to trigger column shifts):

Arduino – AC Dimming – finishing the fade

Yay while()!
Now the fade is finishing before the switch! I’m also not so worried for once about getting stuck in an infinite loop. If the board freezes, at least I don’t have to hard-reboot!

Arduino – AC Dimming

column1 Arduino n AC Circuit column2

Lately I’ve been working on getting the Arduino to control the dimming of an Incandescent bulb using a triac and optocouplers. This circuit is for an interactive installation of internally lit brick columns Christian and I are developing for an exhibition this spring. The video below is showing a PIR that when triggered switches which bulb is dimming. It’s a bad video, quality-wise, but gives you the idea.

Last night I finally got it going the way we were wanting. I’ve had the circuit built for about a week now but getting it to fade on AND off was trickier than I anticipated. Of course, I tend to over-think things too. The code is pretty straight forward. There is probably a better way of doing it, but, oh well, it gets the job done.

I owe a considerable thanks to Ryan McLaughlin and his post on the arduino forum:

Arduino, PIR, and AC Dimming