Multi-camera setup project. - page 46 - Creative Uses of CHDK - CHDK Forum
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Multi-camera setup project.

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Offline cdg

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Re: Multi-camera setup project.
« Reply #450 on: 02 / April / 2017, 07:49:36 »
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The supply is DC 12V 12.5A
and i tried to add two 2200uf capacitors,still not working.
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Offline srsa_4c

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Re: Multi-camera setup project.
« Reply #451 on: 02 / April / 2017, 08:14:35 »
Quote from: cdg on 02 / April / 2017, 07:29:14
Here is the diagram.
If your DC-DC converter really only has a 800mA rating, that might not be sufficient for supplying the camera. Choose a converter that can handle the camera's peak currents (which could probably exceed 2A). Take a look at the specs (output current) of the original Canon power supply to get an idea.

late edit:
Found a picture of a genuine looking CA-DC10 power supply on the 'net. It says:
Output: 4.3V 1.5A
« Last Edit: 02 / April / 2017, 20:22:28 by srsa_4c »
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Offline cdg

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Re: Multi-camera setup project.
« Reply #452 on: 02 / April / 2017, 08:48:14 »
Quote from: srsa_4c on 02 / April / 2017, 08:14:35
Take a look at the specs (output current) of the original Canon power supply to get an idea.
Thank you ! i will try to find out that current.
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Offline waterwingz

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Multi-camera setup project.
« Reply #453 on: 02 / April / 2017, 12:54:27 »
Quote from: cdg on 02 / April / 2017, 08:48:14
Quote from: srsa_4c on 02 / April / 2017, 08:14:35
Take a look at the specs (output current) of the original Canon power supply to get an idea.
Thank you ! i will try to find out that current.
As srsa_4c suggests, your DC-DC converter is almost certainly too small. The moment the camera starts to zoom, the current draw needed will overload it.  As you have already observed.  There are several posts on this forum documenting measured brief current draws of about 1.5 amps IIRC!  Those extra capacitors you added will not help enough to overcome that.

You need something that can source at least 1.5 amps for several seconds without overloading.
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Offline mphx

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Re: Multi-camera setup project.
« Reply #454 on: 02 / April / 2017, 22:37:58 »
Quote from: wasd on 02 / April / 2017, 04:46:02
Hi mphx：
     I have 8 cameras and it's make me crazy to charger them everytime,so i bought a DC 12V power supplies and some DC-DC converters tried to power the cameras,but it's failed at the beginning with one camera,when i try to zoom in ,camera died, i think maybe because of the length of the DC12 power and the camera.The length I need is 4 meters.
Could you help me with your experience?
Thanks.

通过我的 MX5 上的 Tapatalk发言

Why not use a dummy battery pack ?Many cameras have one for situations like this where , getting batteries out , charge them , put them back in , is not practical at all.

You don't mention your camera model , but you can look it up and see if there is one.
And you can "cut" the distance down by using a long power cord and a multi-power-outlet thing (don't know/remember how it is called in english :P )

Only bad thing about dummy battery packs is that they can get really expensive if you have to buy lots of them (dummy battery pack for my model is around 10-11 euros on ebay and i don't think they are the original ones..so 10 x 64 cameras...you get the idea...)
Atleast we know they have the correct specs .
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Offline cdg

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Re: Multi-camera setup project.
« Reply #455 on: 03 / April / 2017, 02:45:27 »
Quote from: mphx on 02 / April / 2017, 22:37:58
Only bad thing about dummy battery packs is that they can get really expensive if you have to buy lots of them (dummy battery pack for my model is around 10-11 euros on ebay and i don't think they are the original ones..so 10 x 64 cameras...you get the idea...)
Atleast we know they have the correct specs .
Just like you said,not cheap for the dummy battery pack.
[/size]I will try to change the [/size]DC-DC converter to 2A or 3A first,see what hanppens,if still not working,i will buy the [/size]dummy battery pack.
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Offline cdg

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Re: Multi-camera setup project.
« Reply #456 on: 03 / April / 2017, 02:48:16 »
Quote from: waterwingz on 02 / April / 2017, 12:54:27
Quote from: cdg on 02 / April / 2017, 08:48:14
Quote from: srsa_4c on 02 / April / 2017, 08:14:35
Take a look at the specs (output current) of the original Canon power supply to get an idea.
Thank you ! i will try to find out that current.
As srsa_4c suggests, your DC-DC converter is almost certainly too small. The moment the camera starts to zoom, the current draw needed will overload it.  As you have already observed.  There are several posts on this forum documenting measured brief current draws of about 1.5 amps IIRC!  Those extra capacitors you added will not help enough to overcome that.

You need something that can source at least 1.5 amps for several seconds without overloading.
[size=78%]I going to buy some DC-DC [/size][/size]converters with 2A or 3A to see if it's working.[size=78%]
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Offline bismo

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Re: Multi-camera setup project.
« Reply #457 on: 17 / January / 2019, 02:18:45 »
How do you load the bcamHost.lua?
I don't understand how to run it on the PC, I've successfully run the bcamRem.lua on the camera by loading it via card reader to the card and run it with "Load Script from File..."
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Offline mphx

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Re: Multi-camera setup project.
« Reply #458 on: 17 / January / 2019, 07:46:52 »
Quote from: bismo on 17 / January / 2019, 02:18:45
How do you load the bcamHost.lua?
I don't understand how to run it on the PC, I've successfully run the bcamRem.lua on the camera by loading it via card reader to the card and run it with "Load Script from File..."
It's been a while since i was playing with lua scripts in chdkptp.So i dont quite remember :) But have a look at this link.Start cli mode of chdkptp and my bet is on this :
Code: [Select]
exec (!)     <lua code>  : - execute local lua
To integrate the script in GUI , its a bit more complicated if i remember well...

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Offline bismo

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Re: Multi-camera setup project.
« Reply #459 on: 17 / January / 2019, 22:29:53 »
Quote from: mphx on 17 / January / 2019, 07:46:52
Quote from: bismo on 17 / January / 2019, 02:18:45
How do you load the bcamHost.lua?
I don't understand how to run it on the PC, I've successfully run the bcamRem.lua on the camera by loading it via card reader to the card and run it with "Load Script from File..."
It's been a while since i was playing with lua scripts in chdkptp.So i dont quite remember :) But have a look at this link.Start cli mode of chdkptp and my bet is on this :
Code: [Select]
exec (!)     <lua code>  : - execute local lua
To integrate the script in GUI , its a bit more complicated if i remember well...


Thanks for the reply! I'll try it after school tonight.
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