View allAll Photos Tagged irsensors
"REACH New York"- An Urban Musical Instrument
by Christopher Janney (January 1996)
More here: www.flickr.com/photos/dpstyles/4060492189/in/photostream/
And here: www.nycsubway.org/perl/artwork_show?121
How to make your own Precision High Speed Photography Trigger!
After many hours of writing and hardly getting up from my desk over the past several days, the first part of the tutorial is complete!!! :-) This would be the instructions for making the main unit. I still have to work on the tutorial section for making all of the cables but that part should not take me too long. And I am toying with the idea of adding Bulb Ramping to the Intervalometer area as well. We will see how the testing goes.
The tutorial and associated blog page can be found on my website at: mrossphoto.com/wordpress32/phspt/
The Tutorial is about 100 pages long so far and full of photos of the assembly.
Let me know what you think or if you find anything that doesn't make sense. I would be VERY interested in knowing who might be planning on taking on this project. :-)
Now it is time to get serious about finding employment! :-)
Cheers!
Here is a shot of the 4 new Shako Solenoid Valves along with the mount I fabricated for them. I made the mount adjustable so that I could adjust the height of each valve to help line up the drops when hitting the water. (each valve is opened individually so I have to make up the timing difference this way). And after some testing, I might have to make a mount that will allow even more adjustment room. I also noticed that I may have to narrow down the IR beam and fine tune the trigger with it as well to get things more precise.
These valves make a HUGE difference in controlling the flow of liquids through the valves!
I originally ran across these doing some research on the internet through Kevin Lewis' Photography blog and informaion he had published on these valves and drop photography in general.
And a guy by the name of Wayne Fulton published some VERY extensive information on the use of these valves in drop photography!
These are DEFINITELY worth the money if you plan on working with drop photography! They will save you hours and hours of frustration! ;-)
For the Arduino based Precision High Speed Photography Trigger. The Tutorial to make your own can be found here! :-)
"REACH New York"- An Urban Musical Instrument
by Christopher Janney (January 1996)
More here: www.flickr.com/photos/dpstyles/4061238252/
And here: www.nycsubway.org/perl/artwork_show?121
Replaced the IR sensor on our 42" Vizio LCD. Turned out to be pretty easy to do and an cheap ($9) fix.
Well... After a thinking it over a little, I decided to go ahead and add two additional features to the unit. I have now added an Intervalometer and a Lightning Detector to it's capabilities! :-)
The Intervalometer is a bit more capable than the standard ones out there and certainly the one I have built into my camera. It has the ability to set intervals down to the milliseconds! The ones have used in the past only allowed me to set intervals in seconds and not fractions of a second. I am sure there are other uses for it but I know for sure it would have been handy in doing some time lapses while doing higher speeds in a vehicle. The Lightning detection circuit is about as simple as it can get and will work with any camera having a shutter lag of less than 90 milliseconds (just to be on the safe side).
I also spent a lot of time re-writing the code for the update routines to make it easier to navigate through the system parameters, make changes to them, and then added the ability to save them to non-volatile memory so that the saved parameters will be reloaded on power up of the system. All in all, I think this unit will work very nicely in what I want it to do! :-)
All of this has taken up pretty much every moment of the last two days, but most of that time was spent fighting a bug that I ran across in the Arduino compiler in dealing with complex OR comparisons. That was bit frustrating to figure out, but I finally worked my way around it. :-)
So... now I can get back to work on finishing the tutorial and getting the wiring diagram drawn up!
A test of my new high-speed rig. I wanted to be able to capture the projectile with extreme precision. Here are three consecutive test runs programmed to capture the pellet at 12 inches from the sensor. (hint: IT WORKS!)
This uses an infrared photointerrupter circuit through an Arduino-based microcontroller to sense the pulse duration of the projectile though the sensor and uses the known dimensions of the projectile to predict its trajectory in realtime.
A tight code loop and a sensor with a rise time of 500 nanoseconds allows very precise timing. The lead is traveling at about 280 ft/sec +/- 2 ft/sec (three pumps of a Crosman 1377)
©2010 David C. Pearson, M.D.
First try at trying to drop a cherry in a spoon of cream..
using photoduino with a 303ms flash pretime and ir sensor
Any tips on how to avoid blur in the cream splash will be apreciated :-) thx
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video :: vimeo.com/40450746
photos by Paulo Pinto
Fabra i Coats, Barcelona, April 13th 2012
"Where's the Ka-Boom!? There was suppose to be an earth-shattering Ka-BOOM! ;-)
Well, the spaghetti inside is now somewhat organized and all of the components have been put in their proper place with initial testing completed. And it was all completed without allowing any of the precious magic blue smoke from escaping from ANY of the electronic components!!! ("Magic Blue Smoke" is what is hidden inside of all electrical components! If something goes wrong and you see the magic blue smoke escape, things usually won't work anymore!) ;-)
Now it is time to put everything together and put it to the REAL test! :-)
Arduino based Precision High Speed Photography Trigger
First try at trying to drop a cherry in a spoon of cream..
using photoduino with a 324ms flash pretime and ir sensor
Any tips on how to avoid blur in the cream splash will be apreciated :-) thx
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video :: vimeo.com/40450746
photos by Paulo Pinto
Fabra i Coats, Barcelona, April 13th 2012
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video :: vimeo.com/40450746
photos by Paulo Pinto
Fabra i Coats, Barcelona, April 13th 2012
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video :: vimeo.com/40450746
photos by Paulo Pinto
Fabra i Coats, Barcelona, April 13th 2012
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video ::
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video ::
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video :: vimeo.com/40450746
photos by Paulo Pinto
Fabra i Coats, Barcelona, April 13th 2012
Arduino and motor shield based line following robot. It uses three home made ir emitter receiver pairs. The motors are powered by two of the 9V batteries and the third powers the arduino. Front wheel is scavenged from a VCR and paper cups used for back wheels.
Better description and code:
Outside set-up, for 'Canon Wireless Light/IR type' slaves, it helps to have a Sunshade or MiniSnoot over the slave's Pre-flash sensor to shade it from direct sunlight.
In the absence of environmental pre-flash bounce, and if pre-flash bounce off the subject isn't cutting it, the pre-flash sensor (the dark window, seen within the shade/mini-snoot) needs to face towards the master unit. Hence the need to be able to orientate the flash-body separately to the flash-head. So, from the camera possition, the bright red flashing 'slave ready' light is clearly visible.
It does'nt improve range especially (beyond what it says on the 'penguin pages'). But it does improve reliability outside in bright ambient conditions.
On a Speedlite 550Ex slave the 'slave ready' flashing comes from the circular area behind the lower half of the red transparent cover.
Background Canon Wireless stuff here;
www.flickr.com/groups/canonwireless/discuss/7215760512008...
Arduino and motor shield based line following robot. It uses three home made ir emitter receiver pairs. The motors are powered by two of the 9V batteries and the third powers the arduino. Front wheel is scavenged from a VCR and paper cups used for back wheels.
Better description and code:
home made ir emitter receiver pairs wired like the pololu QTR-1A sensor. Wiring diagram at www.pololu.com/docs/0J19/all
Prefalll 135 is an interactive audio-visual installation.
It uses the energy of falling water to make watermils rotate and produce sound and graphics.
By opening and closing the taps, the user is controlling the water circuit and defining the parameters of the audiovisual system
Visuals :: Openframeworks+MSAFluids
Sound :: Pure Data
Physical interaction :: photoreflector IR encoder+arduino
by:Rodrigo Carvalho, Katerina Antonoupoulou, Javier Chavarri
video :: vimeo.com/40450746
photos by Paulo Pinto
Fabra i Coats, Barcelona, April 13th 2012
Que?
It's a design for a light sunshade/minisnoot for the Pre-flash sensor of a Canon Wireless slave used outside in bright ambient sunlight.
Material thickness: 2-3mm Corrugated plastic sheet.
Colour: Black
This outline folds up to create a Sunshade or MiniSnoot that reverses to fit either a 580(11)Ex or a 550Ex.
You can print the original (via 'All sizes') from Windows Expl under 'Full page photo print' and it should print to scale, on an A4 sheet, with 76mm being just that. Then transfer to the plastic & cut!
The sections marked 'Overlap' can be trimmed to suit. If you have chosen 3mm corrugated plastic sheet, then regular matchsticks make suitable dowels to create the edge to edge join - finish with black tape.
Attach with either Bluetack under the tabs - or - an elastic band looped behind the flash-body.
Very helpful for Ex Slaves under Canon Wireless Outside.
A game of 3-D chess anyone? No - it is an IR sensor for the US first generation early warning satellites - MIDAS (Missile Defense Alarm System).
The canted angle of the top half - allowed the satellite to scan a large portion of the Earth's surface as the satellite spun around its axis.
The checkerboarding - was probably to allow the satellite to calculate what area it detected the launch out of.
There is a very prominent stone arch or holed stone landmark in Port Appin that in Scottish Gaelic in known locally as the Clach Tholl.
The infrared photo was made on the Rathad na Cloiche-tuill (road of the stone arch / holed stone) and as an exercise in my learning of Gaelic I have tried to find the correct Gaelic spelling to express the genitive that in the title.