Sunday, October 30, 2005

Lab # 6 H - Bridge DC

Until my H - Bridge arrives, here's a googled list of H - Bridge sites and things you can peruse:

Googled H- Bridge Sites

H -bridges to arrive shortly - Priority mail shipped-got the email last night.

The pins weren't too good on this one. They were in fact somewhat of a wider spread than the space accross the divide on the breadboard . I bent the pins on one side but it wasn't quite enough and I was concerned about breaking them so I sent for another H-bridge.

In the meantime I've acquired a serial to USB adapter for the PIC programmer I got on ebay.

[ebay want me to comment on how fast this guy at Carnegie Mellon got the programer to me........yeah,... well, he didn't say anything about how fast he got the $$$ from me so, I hope he 's not the "wait by the email inbox" type]

but enough of that guys' problems......

I signed up for a free demo account at . They allow you to compile your programs for free needing only to endure some advertising. I didn't notice anything being in your faceabout it so for someone who can't be down at ITP all the time, it cold be a time saver. You do need your own PIC programmer but I think it is worth the investment.

Here is a picture of the successful compile of the PIC code for
Lab #6 with the programming verify indicated. The M.E. programmer (wide box in foregound) allows coices from a long list of different chips

This is the breadboard setup.

The board has power but the results thus far are a might less than textbook. The motor benchtested OK but on the board it isn't. I've programmed the PIC twice and the result has been the same. I am running the motor in parallel with the 7805 voltage because the motors' voltage said it was 9-18 volts( my local RS has a poor parts selection- choices were this and a 3 volt motor)
Might be the H- bridge, my wiring or some other glitch. I'll have to reprogam the chip using a programmer in the lab to determine that at least it isn't my new ebay programmer. I'd also like to use a 5 volt motor and eliminate the parallel wiring.


Friday, October 21, 2005

Lab # 5 Serial Out Read in Processing

Here's the setup for Serial to Processing readout.
Serial / USB adapter, potentiometer and RB6 Led (lit green closest to PIC). At first there was no readout through the tracking program in Processing and I thought it might be the cable/adapter. I found that the Device Manager assigned port COM 5 for the USB/Serial. When I changed the program to read COM 5 it didn't work either. Same for COM 4. After that I changed it to COM 1 ( same as read in Hyperterminal) and then TX/RX indicators on the adapter started flashing , data started comming in varied by the pot and the green square started tracking the pot.

Light 242
Slide 181
Button 0
Accumulation 728, 727, 0

Light 110~111
Slide 83
Button 0
Accumulation 333, 332, 0

Thursday, October 13, 2005

Lab # 4 Servo -in- Motion

Here is the setup for the servo lab assignment. Programmed the chip - it's O.K. At first the movement was minimal
but it was only powered with a 500ma DC supply. I changed it to a 1000ma supply but it still didn't work too well.
I repositioned the leads of the servo, fired it up (ha) and with Charles' help, captured this potentiometer / servo synchronized movement.
( Thanks to Arly for technical assistance.)

I'm trying to figure out how to compress the mpg file in HP Image Zone so I can load the Servo-in-Motion movie....and.....(days pass).. now, I Decided to provide a link through my page from Sound Design for the Web for the Servo QT movie:
Servo-in-Motion !
(you may experience trouble when using firefox to view this clip)

Friday, October 07, 2005

Lab # 3 - Analog in - Potentiometer value read through Hyper Terminal

Here's the breadboard for Lab # 3. It works, finally. In previous attempts I mistakenly added the pot wiring as though it was a voltage regulator (IGO) and cooked it. I substituted a flex resistor and a new chip but that didn't work either. I believe the flex resistor may have also been NG because when I decided to try a new potentiometer, the Hyper Terminal readout was O.K. Below are some pix of readout values, through Hyper Terminal, that I adjusted the potentiometer to.

Hyper Terminal readout value = 3

Hyper Terminal readout value = 193

Hyper Terminal readout value = 256

Hyper Terminal readout value = 555

Hyper Terminal readout value = 728 ( my son's birthday)

Hyper Terminal readout value = 1021 ( the highest value this pot would register)

Thursday, October 06, 2005

Device / Instrument / Tool Project - Group: Langdon Crawford, Charles Harlan, Stephen Kerrigan, Adam Samuels

Razor - Airgo, air powered POGO Stick
a more quiet POGO because there's no spring
mechanism. Weight adjustments can be
made for a range of approx. 60 -220 lbs.

Other piston/power band POGO's:

See the POGO Pros do their Stuff Right Here !

October 10th update :
The aforementioned Pogo is expected to arrive shortly. Got it new, discounted and free shipping, albeit in a plain box due to original package damage. Full Razor warranty, though. Pogo, Airgo: Airborne! (heh, heh)

Device / Instrument / Tool Project - Group: Langdon Crawford, Charles Harlan, Stephen Kerrigan, Adam Samuels

Week 1 - Observation and Presentation

Smiles Notwithstanding..... These traditional POGO users are having less fun.. yes,.. less.. fun than they think !

If They only knew..........................

Introducing ~

POGO-Simon / POGO-Tone
An interactive aerobic game, where a player(s) uses a POGO Stick, Pogoing on a floor mounted,
color wheel to replicate cued, random color / sound patterns of variable difficulty. The modified POGO Stick will include a battery to supply a current which will power an “on” event when the stick comes in contact with any of the separate areas of the color wheel. This “on” event satisfies a programming requirement of the PIC, which then triggers lighting and or musical events, Indicating success or lack thereof. Whole or segments of each color area could be assigned different timbres or pitch characteristics. Other modes of play might include individual or ensemble POGO-Tone improvisation.

The player(s) interactivity with the device(s) in POGO-Simon, provides competition, aerobics and mental and physical agility challenges.

POGO-Tone offers aerobic, mental and physical agility challenges as well as the challenge of musical creativity.

The rewards of competitive success and creativity, engage player(s) to continue play.

The POGO-Simon / POGO-Tone 4'- 6' colorwheel design (plan view)

October 7th -update info:

Our group, heeding some sage wisdom, has determined that supplying a voltage, albeit a small one, without a common ground, when the POGOer comes in contact with a conductive segment of the color "rebound zone" is not the workable solution we thought it might Adam is investigating alternate switching possibities that are least absorbing of the POGO's potential energy as it comes in contact with the rebound zone. The closing of a switch to trigger the programmed PIC event and maximum rebound to the next, cued, sequenced, color area are our concerns du jour. When we have found a switching method that works, I'll fabricate the rebound zone segments that the test POGOer will target. You can go to Adam's Blog for switching successes !

Week 2 - Parts investigation and Prototype (basic)

October 11 th update:

Adam is investigating switching possibilities and has some diagrams on his site, so check that out!

Langdon's testing the possible setup(s) for switch events as simulated by the button box. It looks good so see his site for the visuals.

I've been thinking about the punishment this pogo impact will impart to the switch and how the height of our "impact/rebound zone, shouldn't be too high, lest the pogoer catch an edge somewhere. It might necessitate a more low profiled, fixed, pogoing surface. So I googled a while about impact, switch, severe, sensing, thin, pressure and found a site that makes switches that are ribbons and mats and traffic sensing, industrial purposes etc. I've got a call into Paul Sords about the specs of some of the products.....we'll see what comes of it. The product line is from a company called Tapeswitch from England but they have a factory in Farmingdale, NY. It's one of the lines of Anderson-Bolds, an Ohio company. Here's the link:

If we can use any of these switches it might give us a low profile on the pogo surface, stability and industrial stregnth! .....Maybe.

If they are usable I could rout recesses or channels in a bottom peice of plywood to allow the switch to sit flush with the lower surface and rely on the pressure contact through the upper piece of plywood to close the switch and trigger the event, .................maybe, .............we'll see.

October 11 th 10:35ish PM update:

I spoke with Paul Sords late this afternoon and explained to him: who we are and about our PComp project, etc. He is sending me a catalog with the specs for the pressure sensitivities of the line of ribbon switches. There is another product line that uses the same technology as the ribbon switches and turns it into a highly durable mats that, according to Mr. Sords, can be cut and terminated however you'd like. The ribbon switches are extruded to make a 500 foot roll and then cut to length and terminated. Turnaround time for an order is about 1 week. He extended an invite to see the Farmingdale facility, where he says, we could pick an order up ourselves and save some time.

October 12 th update:

Better still............I checked out this site : which is the Farmingdale factory site and we can buy a Do-it Yourself kit for these switches. It may solve a potential problem of stability of the Pogo costs a fortune!

Possible Construction Design for the Pogoing Surface

Weeks 3 - 5 and Presentation:

Construction/Fabrication, Wiring/Lighting, Power Supply and Programming proceeded more or less independently by each member of our group and then we put together a test session for the prospective users to give it a whirl.

4' plywood circle layout wedges cut & routing for tapeswitches wedges primed/painted

Pogo DJ /Pogo Simon Lighting harness
earlier Max setup for Sounds

Brave volunters:

Our user test revealed a "suPOGOsition" regarding our original design intent for the Pogo Simon Concept. That was.... that people would have an easier time Pogoing, that is, using the Pogo stick, than they actually did. The learning curve for the immediacy of our project turned out to be fairly steep. Given enough time and desire on the part of our intrepid users, they may well be able to manipulate the Pogo Stick with enough control to take on a challenge game such as the Pogo Simon concept. The concept is not lost of course, as it can be one of a number of modes that could be available using the Pogo Surface. The novilty of using the Pogo is important. Interest in playing on the Pogo Surface was not as enthusiastic when simply stepping or "dancing". Even though the result of hearing the sounds generated was the same. So we decided to switch modes and in a sense, reward people for participating with whatever their skill set for Pogoing happens to be. The result is a mode of play we're calling POGO D.J., where you actuate serial connections for (Charles')lighting and (Adam and Langdon's)programed loops through MAX when you sucessfully Pogo on the color surfaces. We are anticipating more gratifying user experiences and a greater socially interactive environment surrounding the game. The Pogo Simon concept of being cued with a sequence to follow and when done correctly, being rewarded sonically or simply by the completion of the challenge needs to be reserved for a group with more accomplished Pogoing skills. Our project has that flexibility available to it. We can accomodate any level of ability for users who are able to access the POGO D.J. / POGO Simon Game Surface. Next.......................the presentation ! ............

Post Presentation Coments:

I am most thankful to the concerted efforts of our group. Our ideas came into being and the results were most gratifying. We could/might make the presentable form more elaborate or on the fly changable but the important thing is that the concept was brought into a physical form and one that we were moving toward.
The user experience was was in a range of not really able to manipulate the Pogo (which was much harder to do than anyone thought) to seeming ease. The observed results though, were that people enjoyed the experience of being on the Pogo and Pogo/DJ. suface and observing the occasion of others doing the same. Thanks to Langdon, Charles and Adam, a great group to work with!

For Additional Info about the different areas of hard work in the Project, check out Our Group's Sites, They all like it so, when company comes a callin' :

Langdon's Site

Charles' Site

Adam's Site