building usb-remote-cable - page 45 - Hotwire! Hardware Mods, Accessories and Insights - CHDK Forum

building usb-remote-cable

  • 474 Replies
  • 236581 Views
Re: building usb-remote-cable
« Reply #440 on: 04 / December / 2012, 13:47:25 »
Advertisements
Has anyone done any timing tests in order to determine what is the exact delay between the shoot/full-press signal and the image capture?
I'm using a laser-trigger remote very similar to this: http://www.glacialwanderer.com/hobbyrobotics/?p=11 and CHDK is configured for a OnePush switch with Normal control.   
It all works (pre-focus and all), but there is a delay of about a third of a second between the shoot signal and the image capture -- the laser-trigger is about 50 cm above the where the picture of a falling object is landing, and any delay being introduced by the trigger is one millisecond or less.
A810 1.00e

Re: building usb-remote-cable
« Reply #441 on: 04 / December / 2012, 15:59:29 »
In some previous tests, philmoz measured the time from switch release to sensor data becoming available.

The results (in msec)  were :-

G12 = 470
SX30 = 700
IXUS310 = 320 - 350
SX40 = 280 - 330

I do not think older cameras had delays that big.

Re: building usb-remote-cable
« Reply #442 on: 04 / December / 2012, 16:00:20 »
Hope it helps.


Good find, I have bookmarked it.

Re: building usb-remote-cable
« Reply #443 on: 04 / December / 2012, 19:47:18 »
Has anyone done any timing tests in order to determine what is the exact delay between the shoot/full-press signal and the image capture?
In some previous tests, philmoz measured the time from switch release to sensor data becoming available.
The results (in msec)  were :-
G12 = 470
SX30 = 700
IXUS310 = 320 - 350
SX40 = 280 - 330
I do not think older cameras had delays that big.

You will get a much smaller interval if you use the USB remote sync mode - set it up the same way as you have now but enable sync. 
« Last Edit: 04 / December / 2012, 19:51:10 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16


Re: building usb-remote-cable
« Reply #444 on: 06 / December / 2012, 09:58:44 »
Even though it probably does not bother you, have you been able to find very flexible USB leads ?

Best source for those is the retractable usb cables you can get from ebay for almost nothing. Remove the single screw in the middle of the winder under the label, and it'll come apart (probably with a 'sproing' and a lot of little ball bearings flying everywhere) leaving you with a premade remote cable made from earphone wire.

They're *really* not much good for anything more demanding than a USB 1.1 mouse or keyboard (which is why they're so cheap, and why no other usb cables are that thin or flexible) but they work brilliantly for our purposes.

Re: building usb-remote-cable
« Reply #445 on: 08 / December / 2012, 14:18:23 »
Hey guys, I was looking for a way to remotely trigger my SX10IS for some macro photography and came across this project. I successfully loaded CHDK on an SD card and activated the remote settings based on the wiki page. When I trigger my remote though, nothing is happening. I've verified then when I push the button I get ~4.8V (3 AAA batteries) on the V+ pin on the USB cable I'm using.

Any ideas or help?

Thanks!

Re: building usb-remote-cable
« Reply #446 on: 08 / December / 2012, 14:30:38 »
Hey guys, I was looking for a way to remotely trigger my SX10IS for some macro photography and came across this project. I successfully loaded CHDK on an SD card and activated the remote settings based on the wiki page. When I trigger my remote though, nothing is happening. I've verified then when I push the button I get ~4.8V (3 AAA batteries) on the V+ pin on the USB cable I'm using.
Can you post a screenshot / picture of the Remote Parameters menu ?  Or at least list how you set each value ?
Also,  you cannot trigger the remote while in CHDK <ALT> mode - you need to be in normal shooting mode.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: building usb-remote-cable
« Reply #447 on: 08 / December / 2012, 14:33:26 »
Verify the Switch Type and Control Mode settings.  Maybe you left the Control Mode set to None?
A810 1.00e


Re: building usb-remote-cable
« Reply #448 on: 08 / December / 2012, 14:38:28 »
Also,  you cannot trigger the remote while in CHDK <ALT> mode - you need to be in normal shooting mode.
I was still in <ALT> mode. Got it working now - thanks!

Re: building usb-remote-cable
« Reply #449 on: 08 / December / 2012, 14:40:14 »
I was still in <ALT> mode. Got it working now - thanks!
I've learned to always ask that question first - its a common problem.
Ported :   A1200    SD940   G10    Powershot N    G16

 

Related Topics