Setup for CHDK matrix bullet-time rig with Powershot A450 and A460 cameras - page 5 - Hotwire! Hardware Mods, Accessories and Insights - CHDK Forum  

Setup for CHDK matrix bullet-time rig with Powershot A450 and A460 cameras

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Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #40 on: 26 / August / 2009, 07:02:30 »
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Exactly. The standard remote script. With a N*40ms delay, N=0,1,2...50

I cannot speak for CHDK,  but with SDM you certainly do not need a script and can set very precise user-delays in the Stereo\Synch menu.

Then, just press the switch.

Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #41 on: 26 / August / 2009, 07:06:21 »
I hope to get this number to a 100 next year.

Why do you need the delay between taking each image ?

Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #42 on: 26 / August / 2009, 07:28:14 »
I am creating a shot where the camera moves quickly showing an actor in ultra-slow motion. 40ms is approx 25 fps - PAL format and close enough to film 24fps.
I can slow it down to 12fps for a slow mo shot.

The classic bullet-time shows sometime frozen in time as the camera shoots around. I show the actor moving in slow motion as the camera shoots around..
Hence the delay between each cameras..
CHDK used for a Bullet-time sequence
Welcome to mishra.tv productions

Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #43 on: 26 / August / 2009, 07:30:26 »
Do you think SDM is a better build to use ?
There seemed to be more documentation about the allbest and other builds hosted on chdk so I used them. I am using ubasic and some set_* functions to disable flash etc..

Have to shutoff review time manually as I could not figure out a way to do this from a script..

I dont know if SDM allows you to run a script..Was a bit confused about this..
CHDK used for a Bullet-time sequence
Welcome to mishra.tv productions


Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #44 on: 26 / August / 2009, 07:33:15 »
I meant - not sure if SDM allows you to control so many menu items from a script..
Initially I did not want to mess with menus on 50+ cameras. Now I'm not so sure as I still need to shutoff review time..
CHDK used for a Bullet-time sequence
Welcome to mishra.tv productions

Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #45 on: 26 / August / 2009, 08:02:28 »
Do you think SDM is a better build to use ?

I think you should spend some time looking at just what SDM can do.
It is specifically designed to operate multiple cameras, not just two.

It has already been used by a number of other people to create bullet sequences.

I strongly advise that you try it and study the website.

Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #46 on: 26 / August / 2009, 08:37:13 »
Let us say that you are testing three cameras ...
Download the DISKBOOT.BIN from the SDM website for your cameras and replace the existing version on your bootable cards.
Power-up.
If the header at the top of the screen is red, you are setup for a 'left' camera.
The significance of this is that if the flash did fire it would only be at 1/16 normal power and undetectable in the image.

If the header is blue, the camera is set to 'right'.

In Stereo menu, set position to 'L' (for left).

In menu Stereo\Synchronisation, enable synch delay and set the user coarse and fine delays.
For now, set coarse to 10, 20 and 30 on the three cameras.

Exit menu mode.

Press the USB switch, screen will blank and blue LED will light.
Release the switch.
After one second first camera triggers, then second, then third.

If it does not work, I have forgotten something.


Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #47 on: 26 / August / 2009, 10:43:09 »
Another little tip ...

In the Stereo\Synchronisation menu you will eventually want to set multiples of 20 msec in user delay (0.1ms).

Use the zoom lever to set increment to '100', it will be displayed top left.
Then use left/right buttons to enter '200' for each 20 ms delay required.


Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #48 on: 01 / September / 2009, 03:47:03 »
Another power option -
I have about 8x PC power supplies. I can tap the 12V and 5V supply on each of them..
Does anyone know of a circuit or a zener that I can use to "break" the 12V signal to 4x 3V signals in parallel ?
CHDK used for a Bullet-time sequence
Welcome to mishra.tv productions

Re: DC Socket size on Canon Powershot models 1.1mm 1.3mm ??
« Reply #49 on: 01 / September / 2009, 03:51:21 »
I have 10x of the DX 10w K2-SSC flashlights. Rigged a portable video power supply by mounting it on top of a pole..

!!! Sweet! Well you either build laptop packs or... very few people have the slightest idea what those are, and having 10? I'm guessing you're probably a CPFer. If so, what's your edc? Mine. :b

CHDK used for a Bullet-time sequence
Welcome to mishra.tv productions

 

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