Telematic Gallery Opening 2022

•October 12, 2022 • Leave a Comment

Opening Night

Friday November 4, 2022


Robotics, Lasers, Sensor-Based Systems
by Kal Spelletich

Telematic Media Arts
323 10th St., San Francisco, CA 94103


I did a talk at Telematic Gallery where I have an exhibit up through the end of January. It was more like I drank champagne with some of the best and brightest of the Bay Area’s mind trust.

Luckily it isn’t ALL me and I was able to get some great comments and observations from, let’s see, Steven Wolfe, Camille Utterbach, KAREN MARCELLO, Eric Paulos, Mark Van Proyen to name a few….. And some great questions and comments from the Dorkbot crowd.
The speed of light, the crazy powers of lasers, Deep space and time measured by misusing technology, sensors and robotics!

I did a walk through of the show, all the way into the bathroom for a special peek at work installed there! There’s a pause in the video, Fast forward it for a final few gems near the end.
The show goes till Jan 28 2023 – check it out!
There’s more info on it from Clark @ Telematic:
Galactic Scale Inquiries into the Nature of the Cosmos⁠
Robotics, Lasers, and Sensor-Based Systems⁠
by Kal Spelletich⁠

November 4th, 2022 – January 28th, 2023⁠

Telematic Media Arts is pleased to present Galactic Scale Inquiries into the Nature of the Cosmos, an exhibition of robotics, lasers, and sensor-based systems by Kal Spelletich, responding to science’s extraordinary contributions to visual culture and knowledge. At a time when the authority of critical thinking has been crudely dismissed, Spelletich probes fundamental scientific discoveries in playful and sometimes menacing ways. At the same time, his interactive sculptures emphasize the fact – revealed by the recent rise of misinformation — that the authority of science is not sustained by science itself, but rather depends upon a collective, social commitment to the pursuit of knowledge and the truth. In this way, the show is political, sparking minds and activating audiences by engaging them in a reflective practice that bridges art, science, social consciousness, and philosophy in pursuit of a shared understanding.⁠

Gallery hours: Saturdays, 1:00 – 6:00pm⁠
Or almost anytime, by appointment (just call ahead!): 415.336.2349⁠
323 10th St. at Folsom (SoMA), SF, CA⁠ | @tttelematiccc⁠

!!!!A very big huge thanks To Telematic Director Clark Buckner!!!


#kalspelletich #seemen #newmedia #artandtechnology #artandscience #science #entangledparticles #nobelprize #speedoflight


I celebrate the scientific method and reference foundational scientific discoveries.
This is a body of work I have been doing for well over 15 years. Imagine my surprise when a Nobel prize(1) was given out this week for these same mind-boggling experiments I am extrapolating on (entangled particles). We will be able to hear the moon, sonify crystals, and see and feel the speed of light.
Another main focus is the work of astrophysicist Jocelyn Burnell. (2.)

Special Related Events:
Gallery talk Saturday December 10, 3:00 a live in person in the gallery WITH KAREN MARCELO …..
Also live streamed! via dorkbot san francisco
People doing strange things with electricity



Saturday, January 28, 2023, 3-4P.M.

Closing event robot, sound machine performance with Bryan Day.

Telematic Media Arts is pleased to present Galactic Scale Inquiries into the Nature of the Cosmos, an exhibition of robotics, lasers, and sensor-based systems by San Francisco artist Kal Spelletich. In this body of work, Spelletich responds as an artist to science’s extraordinary, transformative contributions to visual culture and knowledge. Reconstructing scientific tools and experiments with light, stones, sound, metal, video, and machines, his kinetic sculptures and installations explore the sublime dimensions and durations of astronomy, geology, and physics. He highlights their explosion of experience’s everyday parameters, evoking wonder in the face of nature and raising the question of our place in the universe.  At a time when the authority of science has been crudely dismissed and critical thinking has given way to groundless conspiracy theories, Spelletich explores fundamental scientific discoveries and the weight of their hold on the world.  The project is rooted in the history of science, drawing inspiration from the ancient figures of Pythagoras and Gan De; the early modern Leonardo, Newton, and Galileo; and the underappreciated heroes of 20th-Century astronomy and astrophysics, Jocelyn Burnell and Vera Rubin, among others.  At the same time, Spelletich’s work emphasizes the fact – revealed by the recent rise of misinformation — that the authority of science is not sustained by science itself, but rather depends upon a collective, social commitment to the pursuit of knowledge and the truth.  His kinetic sculptures and installations are interactive.  They respond to the physical presence of bodies in space, and they require the audience to engage them.  In this way, the show is political, sparking minds and activating audiences by engaging them in a reflective practice that bridges art, science, social consciousness – even philosophy – in the pursuit of a shared understanding.


There will be robots, photographic prints, sound summoning apparati, a bronze casting of the moon, drawings, a laser carved image/object of an astrolabe to name a few of said inquiries.

The laser carving of the astrolabe is a limited edition of 10
Priced for my friends at $300.00. (see enclosed picture below #4)


    On Oct. 4, the Royal Swedish Academy of Sciences announced that Alain Aspect, John Clauser, and Anton Zeilinger had won for “groundbreaking experiments using quantum states, where two particles behave like a single unit even when they are separated.” The academy noted that these experiments, which built upon the 1960s research of John Stewart Bell, cleared the way for new technology such as quantum computers. Two days later, Scientific American published an in-depth article that explained how these quantum experiments proved “the universe is not locally real.”
  2. Burnell Is responsible for one of the most important astrophysics discoveries of the 20th century: the radio pulsar. The discovery, which she made as a graduate student, earned a Nobel Prize in 1974. And it could one day form the basis of a “galactic positioning system” for navigating outside our solar system. But Bell Burnell didn’t collect the Nobel. Instead, the award went to her supervisor at the University of Cambridge, Antony Hewish. She is now recognized as the pioneer who made this breakthrough discovery.

-We are here for such a short time, don’t waste that time-


Sounding Karlsruhe

•September 2, 2022 • Leave a Comment

ZKM Statement 2022

Here is one short composition of 9 I did at ZKM in Karlsruhe, Germany on July 1, 2022.
The Project is called Soundscaping Karlsruhe. I did a workshop with folks where I directed them to shoot 10 videos that acted as scores to a sound performance with robotic instruments and local bio inputs.
I am creating soundscapes to videos (landscape video as score) using the local environment. The videos conducts volunteers and I when to operate my sound machines/robots. Sensors that harvest data from the earth, local plants, a rock, bird songs to the moon will also cause the robots to perform sounds. The videos are shot from underground reaching up to the stars.
This is a form of Celestial art and sonification inquiry into Landscape. To not look down upon to spy or judge but to interact and try to understand.
The collaborators get to operate the sound machines with me.

Here I am collaborating with the Amazing Yifan Su, she shot the video and is performing along with it.

#experimentalmusic #kineticart #artandtechnology #artist #robotica #robotech

#soundart #art #robotart #science #powacademy #artandtechnology #experimentalart

#robotics #kineticart #soundmachine #soundart

#scientific #science #soundsculpture #kinetic art

#kineticart #soundeffects #soundsculptures

#noisemusic #artmachine #orbmag #soundscape #harshnoise #noisemusic #experimental #noise #dronemusic #industrialmusic #lofi #drone #contemporaryart

A Live Soundscape Performance with Mitch Altman

•August 12, 2022 • Leave a Comment

Here we have the Fabulous Mitch Altman and me performing at X-Hain on July 8, 2022, in Berlin, Germany.
I made about an hour of videos of Berlin landscapes as a score we performed with/to. We made a soundscape according to what and when the video landscapes told us. For instance, Clouds, Trees, the Sun, or Birds clue us when to operate my sounding robots and in Mitch’s case, his many synthesizers.
Mitch’s homemade synths can be gotten for a song and a melody as a kit from:
The Video and pics are by Jessica Cobb!
For the full video see here:

X-Hain is an incredible Hackerspace in the Friedrichshain neighborhood. Check it out!
Thanks to all who came out

#soundon #experimentalmusic #kineticart #artandtechnology #artist #robotica #robotech

soundart #art #robotart #science #powacademy #artandtechnology #experimentalart

robotics #kineticart #soundmachine #soundart

scientific #science #soundsculpture #kinetic art

kineticart #soundeffects #soundsculptures

noisemusic #artmachine #orbmag #soundscape #harshnoise #noisemusic #experimental #noise #dronemusic #industrialmusic #lofi #drone #contemporaryart #dopplereffect #contemporaryart #electronicmusic #music #ambientmusic #ambient #noisemusic #experimental #noise #dronemusic #synth #soundscape #synthesizer #soundart #newmusic #art #darkambient #avantgardemusic #sounddesign #avantgarde #electronica #industrialmusic #lofi #drone #eurorack

darkambientmusic #experimentalart #improvisation #musicproduction #glitch #instrumental #electronic #abstract #contemporarymusic #soundtrack #postpunk #synthwave #soundscapes #wel #rock #bandcamp #artist

Press Release Germany 2022

•June 19, 2022 • Leave a Comment

-What sane person could live in this world and not be Crazy-
Hello All,
We are alive.
And the creative act continues.
I have some shows and workshops in Germany these next few weeks. If you are
nearby, drop on by. Or, if know someone nearby please let them know.

I am creating soundscapes to videos (landscape video as score) using
sounds machines I have made.. I will create new videos in each city. The
videos are of the sun, stars, moon, waterways, trees, grass, ants. So we
will hear the moon, sun and ants.

This is a form of Celestial art and sonification inquiry into Landscape. To not look down
upon to spy or judge but to interact and try to understand.
The Audiences will get to operate the sound machines with me.

Europe Itinerary 2022
Venue: Odonien
June 23

June 24-27
I am doing a workshop at Dortmund University of Applied Sciences

Venue: ZKM
June 27th to July 1st.
July 1 Performance-
this is my big gig!

July 3-13
Performance at x-Hain Space July 8, 8-10 P.M.
With the Amazing Mitch Altman!
This will be fantastic,
Folks are invited to join in with us after our set with their own sound machine/pieces, so bring something weird that makes sounds.

Berlin July…..
The Club Of Polnish Losers
Let’s just call this a secret society gig
Get a hold of me

Be safe, but not too safe,

Some Thoughts on Galactic Scale Inquiries:
This Project is about finding our place in the cosmos and inquiring…… where are we?
What are we.
What will happen to us.
A sort of cosmic overview.
The story of nature’s elusive phenomena
Geologic,cosmic and human time

I aspire to build art committed to not look down at others but to look beyond the planet earth and our perceptions of it. To decode the context and state of our genesis.
To allow you to contribute to this, you don’t have to do all of the work.

Here I am exploring the fundamentals of how the universe works, how we observe it and how the cosmos functions. When we are out of sync with the universes, we are doomed.

Title: Soundscaping Karlsruhe
A collaborative live performance with robotic instruments and
local bio inputs.
A video score shot in the site’s environment acts as a score
conducting volunteers to operate robots.
Sensors that harvest data from local plants, bird songs, the moon
or even the soil will also cause the robots to perform.
Robots built from regional foliage, branches and stones.
To Be in a dialogue with the planet.

Look with equanimity and wonder at the implacable forces that spin, measure, and bring our life and time to its ultimate conclusion.

From my Shero, Martha Wilson:

Feminism contributed the “personal is political”; the idea that what you do on a moment-to-moment basis is a political act. You could argue that being an artist is political, even if you are doing landscape paintings, in relation to the larger social order. I totally believe that.

An Exhibit I am in *!->

•March 10, 2022 • Leave a Comment

“In the dark times, Will there also be singing? Yes, there will also be singing. About the dark times”

-Bertolt Brecht

An upcoming art exhibit I am in:

the final letter in the [ ] alphabet OMEGA

Mamma Anderson, Ala Ebtekar, Francesco Clemente, Mildred Howard, Paul Kos, Susan Middleton, David Nash, Gay Outlaw, John Priola, Jose Maria Sicilia, Isabelle Sorrell, Kal Spelletich, Leo Valledor, Theodora Varnay-Jones.

Exhibition curated by Isabelle Sorrell

Opening Reception March 5, 2022, 5–7pm. Exhibition March 3 – April 30, 2022


I am showing two video pieces, one is a vitrine with a sunsetting sky. An homage to light, nature and space. The 2nd is a reliquary with a video of friends’ hands I asked to recreate praying gestures.

The Amazing Paul Kos has a solo Exhibit on the top floor gallery, this exhibit is downstairs.

Anglim Trimble Gallery

1275 Minnesota Street, San Francisco, California +1 415·433·2710

On my last day on Earth, I’d like to plant a tree. -W. S. Merwin

•January 24, 2022 • Leave a Comment

Here is an etching of data from 2 illegally planted Avocado Trees I planted across the street from my home 16 years ago.

Position of the trees:
I regularly plant trees and plants in abandoned spots in San Francisco. This is guerrilla gardening.
I hacked a sensor to harvest data from each tree.
This data was sonified and processed to two etching robots to scribe on a plate.
The etching is being produced by Maeght Editions in Paris, France. ,

Tree #1. Is named Cassandra. I clipped two alligator clips to a leaf and a tiny branch and recorded data signals, They were sent as sound waves to a subwoofer with a scribe attached to the subwoofer speaker cone to create a sort of seismographic document of the trees life onto the plate.
There are two lines of marks on the plate from two separate data harvests. These are lines 1. & 3.

Tree #2. Is named Helenus. I placed a sensor at the roots and at a leaf to record signals from this tree. The data signals from Helenus are translated via a sound sensor triggering a robotic arm with a scribe attached to it.

There are two lines of circular marks on the plate from two separate data harvests.
These are lines 2. & 4.

As California burns and the ice caps melt I think, what I can do beyond cutting down on my own footprint on the planet. Many years ago I started planting trees and plants anywhere I can.
Maybe the true meaning of life is to plant trees, under whose shade you do not expect to sit.

Video of Harvesting data from the trees:

experimentalmusic #electronicmusic #music #ambientmusic #ambient #noisemusic #experimental #noise #dronemusic #synth #soundscape #synthesizer #soundart  #newmusic #art #darkambient #avantgardemusic #sounddesign #avantgarde #electronica #industrialmusic #lofi #drone #eurorack

darkambientmusic #experimentalart #improvisation #musicproduction #glitch #instrumental #electronic #abstract #contemporarymusic #soundtrack #postpunk #synthwave #soundscapes #wel #rock #bandcamp #artist #contemporaryart

Wainiha Ukelele Experiment

•July 14, 2021 • Leave a Comment

Sound Machine on boulder in jungle on island powered by a floating tilt sensor triggered the rippling flowing waters.

Tilt sensor on driftwood floating in the Wainiha River activates 3-string “Ukelele” playing to the fishes, mountains and jungle.

In which the river plays Ukelele. Not competing with the surroundings, collaborating.

Also known as the Wainiha Banjo Experiment

Wainiha Valley, Kauai: May, 9, 2021

#soundon #powacademy #kineticart #artandtechnology #artist #robotica #robotech
#soundart #art #robotart #science #powacademy #artandtechnology
#robotics #kineticart #soundmachine #soundart
#scientific #science #soundsculpture #kinetic art
#kineticart #soundeffects #soundsculptures
#noisemusic #artmachine #orbmag #soundscape #harshnoise #Ukelele #Hawai‘i

Scaling The Cosmos: Global Human Positioning Night Sky Laboratory

•January 29, 2021 • Leave a Comment

Scaling the Cosmos: Global Human Positioning Night Sky Laboratory, a spectacular public experiment across the skyline, visible from space, illuminating the landscape on planet earth. Scaling the Cosmos will inspire wonder in audiences across the Bay Area while uplifting under recognized contributions to science by women and championing the importance of scientific literacy.

To realize this project, we will point a laser from atop the Salesforce Tower toward Mt. Tamalpais (14 miles away stretching across the San Francisco Bay and two counties), recreating Armand Hippolyte Louis Fizeau’s historic 1849 experiment calculating and measuring the speed of light. The experiment will also honor astronomer Jocelyn Bell Burnell, who made one of the most important astrophysics discoveries of the 20th century: the radio pulsar. Spelletich will transmit simple Morse Code, audio (soundsand stories, poems), messages to other life forms/Extraterrestrial Intelligence and other codified data through laser light to communicate messages addressing our existence in the cosmos alongside observations from the public. We would conduct our Art & Science Light Projection Experiments for one month of Thursdays.

Sample messages include: Be Here Now; As is the Microcosm So is the Macrocosm; C = 3×108 (the speed of light). Scaling the Cosmos will be a remarkable public event that makes tangible the obscure measurement of light, placing control of this wondrous technology and powerful communication tool in the hands of the public.

Fizzeau’s historic 172 year old experiment eventually allowed us to use the speed of a light wave as the length standard to determine the scale of the cosmos. Using contemporary and original 1800’s technology from lasers, light sensors, and satellite positioning, we will recreate this historic experiment. This is big picture science and art looking at deep time and space.

Bell Burnell’s discovery, which she made as a graduate student, eventually earned the Nobel Prize in 1974. It could one day form the basis of a “galactic positioning system” for navigating outside our solar system. But Bell Burnell didn’t collect the Nobel. Instead, the award went to her supervisor at the University of Cambridge, Antony Hewish. She is now rightly recognized as the pioneer who made this breakthrough discovery and an inspiration to those addressing gender-bias in science.

Here is a prototype of the project. Scaling the Cosmos will be 63,360 time larger

The project is also inspired by Spelletich’s observations of the Eiffel Tower — how it was used, and eventually saved, because it became a locus for cutting edge scientific experiments and optical communication from fiber optics to Morse code. Scaling the Cosmos activates the newest addition to the San Francisco skyline, the Salesforce Tower, with a call for public science that echoes the Eiffel Tower experiments in Paris.

Scaling the Cosmos will span across two counties and be visible across the Bay Area, reaching millions of people. In the lineage of the Bay Lights, San Jose Semaphore, Pi in the Sky, and other large-scale public art projects originating from ZERO1 over the past twenty years, Scaling the Cosmos will be accessible to viewers across a large geographic area at no cost. The beam of light will inspire awe in viewers of all ages, inviting them to rediscover the wonder of science.

Imagery of two lasers reflected and playing off of each other

The online presence of the project will solicit input from audiences and guide their open-ended inquiry into the history of science. We will give a live feed as we measure the speed of light and measure the exact distance from sky scraper to mountain. The project website will also host a series of interdisciplinary talks by artists, scientists, and philosophers that will expand on the history of science and contemporary understandings of science and culture.

Scaling the Cosmos is part of a series of works by Spelletich that celebrate the scientific method and reference foundational scientific discoveries with an emphasis on marginalized scientists. Spelletich recreates historic gravity, light, and sound wave experiments that allowed us to understand the scope and scale of our planet, our solar system, to know our beginnings and our place among the stars and the expansive entirety of the cosmos. These recreations and interpretations celebrate the scientific method and reference foundational scientific discoveries. With them, Spelletich aspires to inspire social engagement, both inside the gallery and to the outside world. Spelletich’s creations carry us back in time, to when the sciences and the arts were one, to the fundamentals of how the universe works, how we observe the cosmos, and how we determine humanity’s place within it.

In the contemporary context of politicization and polarization around science, Spelletich is working to celebrate science through art. With the firm assertion that science is real, Spelletich confronts flat earthers, climate change deniers, anti-vaxxers, and a resurgent eugenics movement with an aesthetic invitation to join in the collective practice of understanding the world around us. 


In which I experiment with the Burnell Galactic Positioning System at the Edge of the San Francisco Bay. Experimenting with space, light and sound on the edge of the precipice for 8 Minutes



Salesforce to Mt. Tam. DISTANCE 14 MILES.

DIY Science
DIY Scientist

Maps and mapping

Scale of the universe

Native American signal fires
There is a long tradition of native people in the Great Basin use signal fires on major peaks to quickly transmit news across the basins (valleys).
During the great surveys of the 19th century of the Bay Area to Nevada (some of the same peaks used by native Americans), from which to project light with mirrors to triangulate parallels of latitude). John Muir and Kit Carson guided Frémont during the first exploration of the Sierra Nevada range in California. (They were advised by Native people, as well).

The scale of our comprehension

Cosmic Perspective

Contemplating our Sense of Place

The Vastness of Space and the Immensity of Time

Deep Time, Deep Thinking, Geologic Time

science, that characteristically human endeavor

Revealing a deep mystery Touching Our Sense Of Wonder and Awe

Exploring the Structure of the Cosmos

Between Scale and Eternity

Jocelyn Burnell is still alive.

Astronaut William Anders said that although the astronauts went on their mission to explore the moon, what they really discovered was the planet Earth. He added: “I think it’s important for people to understand they are just going around on one of the smaller grains of sand on one of the spiral arms of this kind of puny galaxy […] it [Earth] is insignificant, but it’s the only one we’ve got.”

July 1849: Fizeau publishes results of speed of light experiment

The speed of light is one of the most well-established values in physics, traveling at over 186,000 miles a second, can be measured so accurately that the meter is now defined in terms of it. But before the 17th century, most scientists, including such giants as Johannes Kepler and Rene Descartes, considered the speed of light to be infinite, able to travel any distance instantaneously. Galileo Galilei was among the first to question this assumption and attempt to measure the speed of light experimentally.

Zooming Out Scaling The Universe:

“If you wish to make an apple pie from scratch, you must first invent the universe.”
― Carl Sagan, Cosmos

“The most beautiful thing we can experience is the mysterious. It is the source of all true art and science” – Albert Einstein
We have now sunk to a depth at which restatement of the obvious is the first duty of intelligent men.
-George Orwell

James Hutton (1726–1797);[2][3] his “system of the habitable Earth
Silent spring

The experiential nature of the experience of deep time has also greatly influenced the work of Joanna Macy.
She is an international spokesperson for anti-nuclear causes, peace, justice, and environmentalism,[1] most renowned for her book Coming Back to Life: Practices to Reconnect Our Lives, Our World and the Great Turning initiative, which deals with the transformation from, as she terms it, an industrial growth society to what she considers to be a more sustainable civilization. She has created a theoretical framework for personal and social change, and a workshop methodology for its application. Her work addresses psychological and spiritual issues, Buddhist thought, and contemporary science. She currently lives in Berkeley, Ca.

Korten’s 2006 book The Great Turning: From Empire to Earth Community argues that the development of empires about 5,000 years ago initiated unequal distribution of power and social benefits to the small portion of the population that controlled them. He also argues that corporations are modern versions of empire, both being social organizations based on hierarchies, chauvinism, and domination through violence.

The Roman Catholic theologian Thomas Berry (1914–2009) explored spiritual implications of the concept of deep time. Berry proposes that a deep understanding of the history and functioning of the evolving universe is a necessary inspiration and guide for our own effective functioning as individuals and as a species.

How do we save what is left of the planet? How do we save humankind? The sciences and the arts are the key.

Cold Mountain Harp

•January 6, 2021 • Leave a Comment

Documentation of a wind powered Banjo. Wind and even squirrels activate tree branches triggering banjo. As performed in the Great Smoky Mountains in North Carolina 8/2018.

RC3 Hacker Conference workshop->

•December 25, 2020 • Leave a Comment

I am presenting at the RC3 Conference this rC3 – remote Chaos Experience
this SUNDAY December 27, at 1:30 Pacific Time 2020

This year, CCC hosts the Remote Chaos Experience (rC3) instead of an on-site event in Leipzig.
This endeavor requires creativity, joy of experimentation and active support.

Art, Science and Artistic Revolutionary Practices

An interactive workshop/demonstration of my art and machines that are about sound, science, absurd engineering,
interactivity and poetically inspired tech. I will talk a bit about my life as an artist and educator. Then
demonstrate a number of my works while fielding questions.

How to build low-cost tech art for next to nothing. Hack Arduino sensors by not using an Arduino!
Collaborate as often as possible, 3 people are a revolution and movement.
Advice on showing your weird tech art.
Why Art!? Because we can and are changing the world with it.
By finding your voice you become empowered and discover your reason for being on the planet! Once you do that,
there is no stopping you.

For almost 4 decades Kal Spelletich has built interactive machines and robots. Spelletich’s work enacts a
liberated awareness and pushes his audience toward creative responses to technology in their lives. His work
explores the interface of humans and science to put people in touch with philosophical interactive experiences.

A face-to-face event with 17,000 people will be neither responsible nor legally feasible this year. But after
this tedious and painful 2020, we really deserve a nice finale!
This is why the rC3 – Remote Chaos Experience will be held.
As much as virtually possible, we want to convey the joy, content, togetherness and wonderful madness that
make up a Chaos Communication Congress.

Hackers are used to remote work and online meetings. This makes our annual face-to-face meetings all the
more important. Of course, it will be difficult to re-enact online
all the things that make Congress what it is for us.
But then someone said it would be impossible. Our ambition was aroused.
Just like every year, we want to see the concentrated energy and creativity of hackers with dedication.

Pre-requisites: None
Preparation and supplies: None, but here is where I get my materials.
Relay Switch: $3.00 + shipping
DC Gearmotor: $12.95 + shipping
Proximity Detector, I/R Reflective for Arduino
DC wall power supplies: 5-12 VDC
Laser $3.00