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[DIY] Astro CCD 16-bit Color 6Mpx Camera

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1182 replies to this topic

#1126 gehelem

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Posted 26 November 2016 - 09:42 AM

I think that there is a right time - software works and some publicity does not hurt. :).

Hope that bug's will be fixed with common effort. Thanks!

Thank you very much Sergiy



#1127 gehelem

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Posted 16 January 2017 - 05:17 PM

Hi,

just to inform followers : cam86 is out for a few weeks, and some of us are working hard on it.

Indi driver under linux "starts to work", if you are interested :

https://github.com/g.../indi_cam86_ccd

Gilles.



#1128 Toups

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Posted 12 March 2017 - 09:07 PM

I am trying to understand the cam84 code. 

 

My understanding is that the ICX453 is a "Interline Transfer CCD - Progressive Scan."  A good description of the various CCD flavors can be found at http://www.adept.net...t/sensors.shtml

 

So here are some items I wish to confirm with respect to cam8sll.dpr.

  • Is the shift3 routine used to clear the charge on ICX453 CCD using VSUB line?
  • Is the shift2 routine used to shift the image to the interline by switching the XSG1 and XSG2 inputs to the CXD-1267 that then creates signals to the ICX453?
  • In other words is the image exposed from the shift3 call until the shift2 call?
  • Is clearline2 used to shift data out of the horizontal shift register to clear it?
  • Does clearframe empty the vertical line register by shifting it to the horizontal shift register and then clearing the horizontal shift register by calling clearline2?

 

I haven't found a good explanation of tri-level usage for Vphi1 and Vphi3, and the charge clearing using VSUB.  Any further clarifications would be appreciated.



#1129 karlfoxman

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Posted 25 April 2017 - 01:59 PM

Autosave_Image_004_L.jpg

 

Hope you guys are all well, as you may know my father and I built 2 Cam84. My fathers camera has an issue with the image seen above. Before we take the cover off and scope all the supplies does any of you guys know what might cause these dashed lines all over the image? The camera at this point was not cooled, but I dont think this is related to cooling.

 

The image has been stretched to show the lines better.

 

Many thanks in advance.



#1130 gehelem

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Posted 25 April 2017 - 02:36 PM

Hi

I'm now working hard on cam86, but here is an advice : i've observed these lines with a particular configuration. 

Its on linux with very limited raspberry pi3 ressources.

The only explanation we've found is related to high usb traffic with limited bandwidth.

So i suggest to check your usb connections : cables, connectors...

Just my 2 cent



#1131 karlfoxman

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Posted 25 April 2017 - 05:20 PM

Will check these, I did have a feeling that could be one cause. Many thanks mate 😊

#1132 Erland

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Posted 14 June 2017 - 09:02 AM

I read the whole thread from the beggining till the end. Inspiring. Got myself electronics for dummies. I'm kind of more advanced than that, or would like to think so, but I'll start there and hope similar project (or this one) will still be alive when I'll be in position where I am comfortable with the concepts and won't have to ask a million stupid questions. I'm really happy that I decided to learn Russian language previously in my life as astroccd seems to be in Russian, but I had only a very brief look so I might have to learn Ukrainian too :D
Huge respect for all those capable to participate in such projects and even more so to the developers. Awesome, guys.

#1133 gregj888

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Posted 14 June 2017 - 10:08 AM

Erland,

 

The Cam-84 is a pretty quick build and not too difficult.  The Cam86 looks similiar and should be a better option, but is a notch more difficult (but haven't looked at it too hard yet).

 

I have a build thread that has scope traces for the various signals.  Can't help much on the Cam86, but happy to answer what I can on the cam84.  



#1134 steveastrouk

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Posted 14 June 2017 - 06:26 PM

Ukrainian too laugh.gif
Huge respect for all those capable to participate in such projects and even more so to the developers. Awesome, guys.

Ukrainian. Most definitely not Russian.



#1135 karlfoxman

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Posted 11 July 2017 - 01:56 PM

Have just finished the testing stage of the new controller I have designed and built for our Cam 84.

 

Uses a PIC24 MCU to read all the sensors and control the TEC inside the camera, we decided to use a closed loop air system to dry the air inside the camera. The pump pumps air first through 2 bottles holding silica get crystals, this is then fed through a particle filter before entering the camera. From the camera the air is piped into a dome that houses a humidity and temp sensor. This data reads the RH and temp and the software calculates the dew point in the air system. This gives us a failsafe way of ensuring we never see any dew forming inside the camera.

 

The dew point can be used to auto set the temperature of the imaging sensor, or can be used in manual mode but always gives indication if your setting temp near to dew point.

 

After testing we are very pleased with the system performance, it really does an amazing job. We get delta t of around 40 degrees but use a safe limit of -20 for the imaging sensor.

 

Some photos, some minor metal work to still be done..

 

20170711 164817
20170711 164743
20170708 230715
20170707 194047

  • mark77 and gehelem like this

#1136 gehelem

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Posted 11 July 2017 - 03:53 PM

Very nice !

Which model is your tec ?

how many amps to reach dt=40 ?



#1137 karlfoxman

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Posted 11 July 2017 - 04:00 PM

Thanks 😀

I will have to check, it's 40mm x 40mm I think it's 5amp 12volt

TEC1-12706 rings a bell.

#1138 gehelem

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Posted 11 July 2017 - 04:09 PM

It seems a lot to me : does it really drains 5amps ??

Some of us with cam86 use a double stage tec 19003

And can reach -40 with a little more than 2amps



#1139 karlfoxman

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Posted 11 July 2017 - 04:15 PM

I was wrong sorry it's TEC1-12704 3.2 Amp @ 12v

#1140 gehelem

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Posted 11 July 2017 - 04:23 PM

Okay... thx 

I really like the silica bottles idea !

Will give it a try if i find time...



#1141 karlfoxman

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Posted 11 July 2017 - 04:31 PM

Its really a very nice system, the humidity drops very quickly to around 3% if the crystals are fresh. The two bottles will last over 24 hours of running until the sensor reads around 6-8% RH. I will have to make a screen video of the software showing the readings.

 

Obviously our camera's are almost completely airtight to stop and leaks. If you unscrew the cover even by two turns the sensor reads a rise in RH.

 

I will look into the 2 stage TEC you talk about, although we really don't think we need to go below -20 Degrees. One good side is it looks like it would require as much as 1 amp less with your peltier.



#1142 gehelem

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Posted 12 July 2017 - 01:59 AM

Wich sensor are you using ? Dht22 ?

I'm surprised that all this silica lasts only 24h...



#1143 karlfoxman

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Posted 12 July 2017 - 02:01 AM

HIH8131-021-001

It lasts ages but after 24hours it's risen by about 3-4%

#1144 gehelem

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Posted 12 July 2017 - 02:08 AM

Ahhh ok thank you

Sorry for misunderstanding



#1145 kalalaa

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Posted 26 September 2017 - 03:52 AM

I bought the Sequence generator pro astro software, but the Cam84 doesn't work with it. 0-0,4 sec it works but above 0,5 sec expo it can't download the image. Can somebody try SGPro? It is 45 day trial.



#1146 WSG

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Posted 29 September 2017 - 09:17 AM

I tried theSequence Generator and observe the same behaviour. Normaly I use Nebulosity and there any exposure time works fine.



#1147 WSG

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Posted 29 September 2017 - 09:32 AM

One year ago I had the same Problem with Sharpcap. Just did not remember. My brain ist getting old :-(

 

Look at post #1040



#1148 kalalaa

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Posted 01 October 2017 - 03:44 AM

Thank you WSG. I found the post but not solved yet. Maybe in the future.



#1149 gregj888

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Posted 01 October 2017 - 11:23 AM

I set my Cam84 up with ImageJ.  Tried with Astro-ImageJ but it was a rev or two back so didn't work.

 

It's not the best, but seems to work.  

 

Hoping to use the Indi driver and Linux/Indi/EKOS for automation.  Will have to see how that goes as I've had to many other projects to date.

 

Greg



#1150 WSG

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Posted 01 October 2017 - 11:59 AM

Hi kalalaa,

 

I found a work around that worked for me to get longer exposures with Sequence Generator.

For Nebulosity there is  an additional driver available that allows Nebulosity v4 to act as an ASCOM camera for other programs.

First I start Nebolusity and connect Cam84 to it. Then I start Sequence Generator. There I select "ASCOM Camera Driver for Nebulosity" as Camera.

If I now chose exposure times of several seconds in Sequence Generator I get the image from Cam84 . I tried this up to 60 seconds.

 

As I use a licenced of Nebulosity I do not know if this works also with the not registered Version. Maybe you can give it a try.

 

Regards

Wolfgang


Edited by WSG, 01 October 2017 - 12:00 PM.



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