cash machinepres woodbury

Machine Project Cash Machine @ The New Children’s Museum, San Diego

Tod E. Kurt and Carlyn Mawteampneumo.com

October 24th, 2011Woodbury University

Monday, October 24, 2011

Hello!

The Cash MachineAn interactive fundraising installation piece now in the lobby of a children’s art museum in San Diego

Quick movie of it in action

Machine ProjectProvides resources to, and collaborates with artists working with technology; promotes interaction between artists, scientists, poets, technicians and performers.

What is Machine Project

Machine Project

The Original Cash Machine

Machine Project Original Cash Machine Movie

Movie of it in action.This is what it looks like / How it works-- He had an idea that it could be pitched to this museum -- Wasn’t sure about the engineering for additional features-- Called us to figure it out

Machine Project Original Cash Machine Movie

Movie of it in action.This is what it looks like / How it works-- He had an idea that it could be pitched to this museum -- Wasn’t sure about the engineering for additional features-- Called us to figure it out

Carlyn-- Founder of CRASH space LA hackerspace-- Author of many original Arduino.cc tutorials-- Instructor at ITP, Machine Project-- Special Effects / Pyrotechnics work for film

website: carlynorama.comtwitter: @carlynorama

Tod-- Creator of BlinkM Smart LED-- Designer of Wiichuck adapter & WingShield-- Contributor to MAKE magazine-- Author of “Hacking Roomba”

website: todbot.comtwitter: @todbot

Initial Ideas & Proposal

Our design brief was brief:- Detect bills- Make noises, flash lights, make motion - Use 3 HP Dust Collector (Harbor Freight, Red) if possible

Stuff Hanging OffBigger Dust DetectorLiteral “bells & whistles”First Idea adjustment (inlet pipe organ/reed instrument vetoed)

Initial Ideas & Proposal

Use 3 HP Dust Collector if possible (Harbor Freight, Red)

Stuff Hanging OffBigger Dust DetectorLiteral “bells & whistles”First Idea adjustment (inlet pipe organ/reed instrument vetoed)

Anatomy of the new system

• Pneumatics

• Bill Detection

• Sound & Light

• Movement

Can the original be made prettier?Pneumatics - Includes the tubing, the cyclone and the impellerBill Detection - Sensor for the bills and a special mounting harness for themSound & Light - Wanted real world behaviors so we had to figure out the best way to approach that.Movement - And there needed to be movement on the wall that had to be very large.

Pneumatics

Impeller & Impeller Trigger, Cyclone, 200 ft. of Tube.

Recon & Initial PlanPneumatics

Animation movie of how it might look in the space.

The pneumatics again, is the tubing, the impeller and the cyclone that all need to find a home in a pretty stunning space.The space is very vertical: our main elements would start at the 15 feet and go up to 35 feet.

This was a good experiment on how to convert architectural diagrams into a 3D model for visualization.

Recon & Initial PlanPneumatics

Animation movie of how it might look in the space.

The pneumatics again, is the tubing, the impeller and the cyclone that all need to find a home in a pretty stunning space.The space is very vertical: our main elements would start at the 15 feet and go up to 35 feet.

This was a good experiment on how to convert architectural diagrams into a 3D model for visualization.

Pneumatics / Where to place the cyclone and the impeller?

The chosen impeller to hopefully work with so much tubeis 3 horse power and 99dB, so it’s not quiet. It also takes 220V. We had some suggestion of different places to go, but in the end they came and got it to do sound checks. Smart move. The put it in the closet. It meant drilling hole for the tube and adding 220V for them.

But once we figured out where they were going we still had two major questions to answer:- Will it pull the bills through 150+ feet of tube- How will we trigger it from across the giant lobby?

Pneumatics / Will is suck?

Bendiness and Length Sharp bends create vortices that reduce suction, but we want a space-filling design

Test - Problem: Horizontal

The real space is vertical; will our horizontal tests be valid, does gravity play a big role?

Pneumatics / How to trigger 220V from a distance?

Possible trigger solutions: - Run wire (Would be ugly, issues with wire length: it’s 80ft along wall, 40ft line-of-sight)- Considered doing a custom radio solution, but that didn’t solve having a UL rated 220V switching solution.- Ended up finding wireless remote designed for dust collectorsThank you Amazon (Amazon as research tool)

Pneumatics / Hack an existing product.

1 of 2 from Hack 220 VUsing a “Long Ranger III” wireless remote for 220V woodworking equipment.Remote taken apart and circuit made to push buttons on remote with relays.Circuit soldered down on a SparkFun ProtoShield

Pneumatics / Hack an existing product.

2 of 2 from Hack 220 VFirst version of circuit had some intermittent behavior.Second version had some improvements- 9V regulator to emulate 9V battery- added antenna wire to existing antenna to extend range- flying leads replaced with plug-n-socket connection

Pneumatics / Submitting the Layout

They needed to know ahead of time for mounting hardware orderingWe needed to know to design the spinners, supplies ordering(With and without dots)

--- Notes about the Cyclone probably not for this talk.-- Cyclone bottom with Lock-- basket ball hoop with red tape & foam for mount-- finding 6 inch to 4 inch adapter for side and 4 inch to 8 inch adapter for top.

Pneumatics / Submitting the Layout

They needed to know ahead of time for mounting hardware orderingWe needed to know to design the spinners, supplies ordering(With and without dots)

--- Notes about the Cyclone probably not for this talk.-- Cyclone bottom with Lock-- basket ball hoop with red tape & foam for mount-- finding 6 inch to 4 inch adapter for side and 4 inch to 8 inch adapter for top.

Show the Arduino the Money.

Bill Detection

!Bill Detection / The Starting Point

Render from proposal. A kind of “clamp” that surrounds the tube and has embedded sensors, holding a box of electronics.

Challenges we had to figure out:- Can we really detect bills?- Will this mounting solution work?- How to actually build the mounts?

Let’s assume IR Beam-Break– Would the tube refract the light?- Speed of detections, are the sensors fast enough- Tolerance of Ambient Light

How to mount the sensors?- Use existing tube mounting hardware?- Design our own laser cut mounting rings?- Or design our own 3D printed clamps?

Bill Detection / IR Beam Break

So what are those components... (pictures of ‘lil ring boards)Standard IR LED and standard TV IR remote control detectorThat proved useful in testing later on installed tubes (use TV remote to trigger)IR detectors need modulated IR light,Helps filter out ambient light changesTo modulate light, need Arduino hardware timers, can’t “delay()” this

Bill Detection / Lots of tweaking for sensor ring itself

Many design iterations of the sensor rings and the electronics boxHad around 40 versions, about 10 fabbed.Will it hold? Will it align the sensors correctly?

Bill Detection / Lots of tweaking for sensor ring itself

Bill Detection / Custom Shield

Picture of Bill Detector Arduino ShieldSo much in a little space so best course of action was to make custom shieldBreadboard version proved out the idea, but can’t use in production.

Bill Detection / Custom Shield

Picture of production shields

Bill Detection / Test

First prototype PCB (fabbed 3 versions total)3D printed rings act as both clamps around the pipe and as mounts for sensor boards

Bill Detection / All together

Final production version of sensor rings.3D printed rings act as both clamps around the pipe and as mounts for sensor boards

Noise & Light

Bells, Servo Motors & MaxMs

Noise & Light / Bells, Bells, Bells

Tried different bell types (Amazon & Guitar Center as research tool)- Desk bells- Jingle bells- Cow bells- Shaker Sticks- Drums & CymbalsNeeded something that cuts through the noise but isn’t annoying.Children’s handbells seemed to best solution.

Noise & Light / Solenoids Vs. Servo Motors

Actuation methods – servo motorsBell striking typically done with solenoids b/c they have speedBut servos have SWIIING, works in multiple orientations, don’t use as much power

Noise & Light / The right striker

Picture of servo mounted strikersServos can’t move fast enough.So we stole springiness from the strikers, they make the up the needed speed

And the strikers needed to be hard & dense to get the right tone.

Noise & Light / An extra signal

Picture of MaxMSuper bright, will allow an update of color pattern (light engine) in the future if desired and / or upgrade to strip lights.

Noise & Light / The Build Out

Production bell box.Laser-cut wood form the box,3d printed sensor ringsEverything painted Machine Project Red

And the arrangement of bells produce a custom melody

Spinny Bits

Styrofoam Fantasy

Spinny Bits / Baffling Red Whoosie Whatzits

This was not really part of the original project plan, and mentally had started out as little flags and pinwheels.

But realized that we would need some fairly large objects to fill the volume of the space.

Servo drivable / combination of full rotation and regular for different behaviors. Some motion all the time and some just a trigger reward.LIGHT Texture

Spinny Bits / Material & Process Research

Styrofoam, what to cover the styrofoam with, what could expedite the process

Spinny Bits / Design Research

Initial designsSpikeyFlatMore 3 Dimensional / More Visual Volume / Less Fragile / More AsymmetricNeeded to change mounting style (there is a hole down the middle)

Spinny Bits / The drawing board

Me looking tiredDesigning the “feel” of the entire piece, and the behaviors of each spinny bit.

Spinny Bits / Swappable mounting hardware

Many iterations of the mechanical linkage to transmit power from servo to spinnybit.Also many iterations of the box itself to hold the servo motor.

Spinny Bits / Swappable mounting hardware

Close up views of the servo linkage and the spinnybit mounting plate, both 3d printed

Spinny Bits / The drawings

What kind of motor are they attached to, size factor, what order, how much Styrofoam of what sizes, how much balsa wood of each size? Nice to have a sketch book, but also need a spreadsheet.

Spinny Bits / Manufacturing Process

Manufacturing ProcessLots of tests with different toolsPicture of MeWhite Assembled On the GrassPainted RedPrimed?

4 Days, 5 People

The Install

Mount Impeller (hole in wall)Mount Cyclone (Attach to rest, add end cap)Bell BoxesSplice Power in from 3 places, wire it to all the boxesSpinny Bit BoxesThe Intake Had to Be mounted, lit, child proofed a little.

Install / Mounting the tubes

Trouble with angles...Mount PipeFlexible Hose as GasketThere was an app for that. (Clinometer iPhone app helped get the 45 degree angles)

Flexible Hose as GasketCut small lengths of the hose to cushion delicate acrylic tube in metal bracket.

Tubes installed, now time for bell boxes

Install / Mounting bell boxes

Giving the bell boxes their approx. location so we could test them.

Install / Mounting spinny bits

Key holes were drilled into back of motor boxes for mounting

Install / Scissor Lift Joy.

Being 3 stories up in a scissor lift is fun, but tiring.

Install / Occupy San Diego

Going on at the same time as our install.

October 15th OpeningThe Pay Off

The Pay Off / Mo’ Money

The Pay Off / People Playing

Movie of it in use

But more to go...

What we learned from children watching it...Fixing the flash problem...Good for us that it is a children’s museumMore challenging because has to be more “hardened”Excellent because the HAVE a maintenance staff with skills.The circuit we showed is actually going in on Wednesday b/c of loose connectionRefine the behaviors of the spinnersReplaced on of the spinners where the arm didn’t survive (the glue didn’t take)

More To Go / Flash Dance

Camera flashes trigger all bell boxes

Questions?

Thank You

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