Flash and LCD off - page 3 - General Discussion and Assistance - CHDK Forum

Flash and LCD off

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Re: Flash and LCD off
« Reply #20 on: 24 / April / 2013, 21:09:38 »
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lcd_on_off turns the display off to save far more power than just turning the backlight off.
The A450 has an OVF (optical viewfinder) so you can save a lot a lot of power using the DISP button to turn the display off.  In fact, it will save you more than turning off the backlight in your script.   

There is actual test data to support this posted here :  http://chdk.setepontos.com/index.php?topic=9049

So you either remember to use the DISP button to turn off the display prior to launch or you can use this version of the script to do it for you :

Code: [Select]
@title Balloon 3
@param a = interval (sec)
@default a 60
if get_mode = 0 then goto "in_rec"
  sleep 1000
  set_record 1
:wait_rec
  sleep 100
  if get_mode <> 0 then goto "wait_rec"
:in_rec
sleep 500
set_capture_mode 2
sleep 500
set_prop 143 2
set_prop 5 0
c=5
print "started..."
while ((get_display_mode <> 2 ) and (c > 0 ))
   click "display"
   c= c - 1
   sleep 1000
wend
:loop
    shoot
    sleep a*1000
goto "loop"
end
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Flash and LCD off
« Reply #21 on: 24 / April / 2013, 21:45:50 »
Ahh, that's quite helpful.

I think I'm all set for the test launch.

I will let you know how it all goes.

Re: Flash and LCD off
« Reply #22 on: 25 / April / 2013, 04:43:58 »


I think I'm all set for the test launch.



But will your exposures be correct at high altitude and will the shutter speed be fast enough ?

It is possible to test that in advance, you will have to wait until you recover the payload.

Re: Flash and LCD off
« Reply #23 on: 25 / April / 2013, 19:06:44 »
But will your exposures be correct at high altitude and will the shutter speed be fast enough ?
A quick google search for  "CHDK High Altitude Balloon" turns up a lot of good sites, complete with CHDK scripts and images.  Pretty much all of those scripts run the camera in AUTO mode and the posted pictures are very impressive.   

The only issue I stumbled across was a concern about not being able to lock focus at infinity by one person. This is unfortunately a little difficult to do reliably in scripts with some camera models and it did not look like the author had tested thoroughly prior to launch.

But if someone is looking for a more sophisitcated CHDK script,  this looks interesting.  Its a very modular, well tested CHDK Lua script, complete and ready to go,  and already tested on HAB missions.  Lots of great pictures on the site and excellent detailed technical documentation.

http://www.francescobonomi.it/ICBNN

Well worth the read even if you are not planning a HAB flight!


Quote
It is possible to test that in advance, you will have to wait until you recover the payload.
Yes, it is in fact possible to test in advance.  Because, best of all, the above script includes support for testing and simulation on your PC prior to flight!

I'll play with it a bit - there are a few CHDK updates (like different power saving modes recently documented) that can be added.

And for the benefit of the curious, heres a couple links to CHDK threads on the subject :

http://chdk.setepontos.com/index.php?topic=3766.0
http://chdk.setepontos.com/index.php?topic=2376.10
http://chdk.setepontos.com/index.php?topic=4541.10

and several other websites of HAB missions (with scripts) using CHDK :

http://www.edgeresearchlab.org/our-projects/edge2-01-sept-2012/chdk-camera/
http://2the3dge.blogspot.com/2012_10_01_archive.html
http://www.veengle.com/s/High+Altitude+Balloons/7.html
https://www.sparkfun.com/tutorials/186
http://www.straybytes.com/tag/high-altitude-balloon/page/2/
http://www.trackuino.org/2011/06/intervalometer-with-chdk.htm
https://github.com/zinkwazi/HAPPy-CHDK
http://ava.upuaut.net/?p=78
http://stilldavid.com/blog/2010/07/high-altitude-weather-balloon-project/
http://ostro.ced.berkeley.edu/~crisr/discuss/comments.php?DiscussionID=3752
http://www.mrtaylorsclass.com/HAB/hack.php
http://www.zinkwazi.com/scripts/chdk-intervalometer/
http://ukhas.org.uk/projects:habe
http://www.stratodean.co.uk/2013_03_01_archive.html
http://fourier.fhsu.edu/mediawiki/index.php/High_Altitude_Ballooning
http://www.mikedeep.com/Project-Soar/Overview/14004205_gKURw
http://habexperiments.wordpress.com/2012/01/06/habe2-update/
http://www.jamesbrittin.com/balloon%20photography.html

Ported :   A1200    SD940   G10    Powershot N    G16


Re: Flash and LCD off
« Reply #24 on: 25 / April / 2013, 20:16:45 »
But if someone is looking for a more sophisitcated CHDK script,  this looks interesting.  Its a very modular, well tested CHDK Lua script, complete and ready to go,  and already tested on HAB missions.

But that is exactly  what the SDM ready-to-run script is based on !!!!! .

It is all done for you.

Waiting for the lens cap to be removed, fastest possible shutter speed up to maximum preferred ISO, gathering of brightness reading, averaging a certain portion of them, using that computed value for stratosphere shots, etc,etc,etc.

No need for Lua, just load DISKBOOT.BIN and the script and run it.

Bonomi + improvements is at your finger tips !
« Last Edit: 25 / April / 2013, 20:20:46 by Microfunguy »

Re: Flash and LCD off
« Reply #25 on: 25 / April / 2013, 20:22:56 »
delete
« Last Edit: 26 / April / 2013, 04:50:18 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

 

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