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  #41  
Old 05-09-2009, 11:42 AM
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mldee (Mike)
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Ascom compatibility concepts

Rally, thanks for the very productive comments and information you have provided on the ASCOM aspects of the project. They provide the sort of 'discussion points' general knowledge we need.

I think you hit the nail on the head with your comment "Someone just needs to:

1 - Make the hardware controllers,
2 - Write an ASCOM driver,
and
3 - Write a Windows interface !!!"

You've spelled out well the priorities and associated tasks we need to address, once we've decided on which functions we are trying to include in the controller.

I don't see myself as any sort of "code dog", and my knowledge of the procedures needed to write an ASCOM driver is non-existent, and I must confess, I don't have much interest in learning at this stage in my life, but I'm sure in the IIS group we have others who are competent and have the knowledge.

I see my role as more of a 'startup catalyst' to organise getting the project up and running, while donating those of my skills which may be of some use.

Some may also pop up from other places in the Astro fraternity with already-written drivers or such. So having the objective of making the controller ASCOM-compliant is a worthy one and I feel should be fundamental to the project concept.

I see us presently at the "pre #1" (make the hardware controllers) stage. We need to identify which functions the controller will handle, based on inputs from members. We should then prioritise the functions by demand and ability to achieve them, including the ASCOM aspect, and then decide on the type of hardware controller that is most suited to the task. Once we have done that, we can then assign knowledgeable members to concentrate on the ASCOM and GUI aspects of the project.

Perhaps a simple XL spreadsheet approach is the way to compile such a list with all the factors available on it for reference. I don't mind doing that.

In the meantime, perhaps some feedback from interested members on this overall approach would be useful, as well as further inputs on desired functions, based in the info available so far.

I don't have any firm preference on how "all-singing, all-dancing" this controller should be, except the quite obvious one that the more complex we make it, the longer it may take to come to fruition.

So perhaps the "Keep It Simple" one is a good way to start until we have identified our individual capabilities. Of course if a lot of the hardware and drivers is already available, simplicity can be readily achieved whilst making a more capable unit.

So far functions that have been identified as desirable by myself and Steve include:

Focusing
DC power monitoring
Weather and related Dew monitoring/control
Dome/roof control
Lighting controls
CCTV Camera switching
CCD temp monitoring
Security monitoring.

Any comments on other useful needs?

I will come up this weekend with a spreadsheet list on these showing possible hardware controllers, costs, and present ASCOM status, so that we can move towards the prioritisation of efforts, depending on demand, achievability and cost. I must admit, so far I see nothing overly demanding.

There are also the basic design concepts such as LAN, Wireless, PC hardware, standalone ability, GUI approach, etc to be addressed early on.

The group will also need to review each function to get a firm grasp of what the users expects/needs it to achieve. That will come after the list has been compiled.

There's also the persistent subject of future basic machine shop needs for hardware, brackets, etc.

Anyway, time for more inputs from the floor.

Cheers
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  #42  
Old 05-09-2009, 12:15 PM
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kinetic (Steve)
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Quote:
Originally Posted by mldee View Post

So far functions that have been identified as desirable by myself and Steve include:

Focusing
DC power monitoring
Weather and related Dew monitoring/control
Dome/roof control
Lighting controls
CCTV Camera switching
CCD temp monitoring
Security monitoring.

Any comments on other useful needs?
Cheers
Peltier control
Filterwheel control
DSC feedback : ArgoNavis or David Ek box for example

Rally mentioned these and a few more
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  #43  
Old 05-09-2009, 12:40 PM
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mldee (Mike)
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Quote:
Originally Posted by kinetic View Post
Peltier control
Filterwheel control
DSC feedback : ArgoNavis or David Ek box for example

Rally mentioned these and a few more
Yep, but they referred to items that at this stage anyway, I didn't think we were going to address, such as scope & filter control, as they are already available in other software packages. I know nothing of DSC feedback functions or the need for it. Perhaps someone can illuminate me.

Agreed, it would be nice to incorporate all of them, but for startoff, it is preferable to focus on those functions that are not readily available in a "controller package" and are desired by IIS members, as shown by their inputs to the thread.

Hopefully, over the weekend those inputs may start to be posted by other interested IIS members.

Cheers,
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  #44  
Old 07-09-2009, 04:41 PM
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mldee (Mike)
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There seems little interest within IIS in participating in this activity, so I'll turn my attentions elsewhere to complete the task.

My thanks to those who did contribute information.

If anyone still has interest in the project, please feel free to PM me.
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  #45  
Old 13-09-2009, 02:22 AM
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KenGee (Kenith Gee)
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Hi all,
I used one of these kits to build a cloud sensor last year for my Observatory it works well. I make use of the ASCOM standard for the rest of my off the shelf stuff. I'm a programmer so I would be willing to help out.
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  #46  
Old 13-09-2009, 08:37 AM
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Hello people, I have just coma across this thread, and note that someone else has mentioned Arduino.

I have been using this board for a couple of years and cannot rate it highly enough. It has an IDE (integrated development environment) that works under Linux, Windows and Mac OS, it has a very powerful processor (Atmel AVR) at its core, there are a great many plug-in boards for relay, LCD screen, ethernet etc, and ... it's really low cost (around AUD45 for 6 analog in, 13 digital I/O & PWM, 1 serial/USB, and bus powered). It can work as a standalone system or comm through USB for monitoring or interactive control.

It uses a C compiler (avr-gcc) but the beauty of the system is that you don't need to dig through makefiles - it is really an elegant, clean implementation of what a microcontroller project environment ought to be.

I program on the Mac (REALbasic) and now use the Arduino exclusively as a target for my microcontroller needs at work.

Regards,
Tony Barry
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  #47  
Old 14-09-2009, 04:33 AM
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Hi,

Same as Tony I found this posting quite late.

I have started with the remotization of my Observatory maybe a year ago and it grew steadily and so far I can say I am finished to 99%. That missing 1% will never come because I always find somehting to improve or change

I am using boards from www.controlanything.com which come in a huge variaty of communication possibilites and switching possibilities.

I am using the board ADR85ProXR which has 8 SPDT 5amp 240v relays as well as 8 A/D inputs be it 8 or 10 bit resolution.

http://rainerehlert.com/ObsReal14/Remoto/ADR85ProXR.jpg

Also I just purchased a new one with 2 boards as everything grew and now I have 16 SPDT relays 5amp 240v which are the AD1216 and XR165

http://rainerehlert.com/ObsReal14/Re...D1216XR165.jpg

You just need to write a program in VB.net with simple commands consisting of 2 or 3 bytes.

The communication I use is serial because it is easy and the serial ports do no hang up

Here a few images of the installation in my Observatory

Main switching like PCs, power to the columns etc. Sorry for the mess but it works
http://rainerehlert.com/ObsReal14/Re...enterBoard.jpg

and here a view into the control box of one oy my piers
http://rainerehlert.com/ObsReal14/Re...ControlBox.jpg
http://rainerehlert.com/ObsReal14/Remoto/ROR-20.jpg

The big black bos is a UPS for Rack installation and delivers 500VA which allows me to keep alive my pier for about 30 minutes

and here the box closed
http://rainerehlert.com/ObsReal14/Re...-remoto-00.jpg

In order to have the safety functions I am using so called reed relays as used in home security which are activated via magnets.

Here the roof safety in closed state
http://rainerehlert.com/ObsReal14/Remoto/ROR-00.jpg

open state
http://rainerehlert.com/ObsReal14/Remoto/ROR-02.jpg

Here on one of my GEM Losmandy G11
http://rainerehlert.com/ObsReal14/Remoto/ROR-07.jpg

Here a screenshot of my GUI for switching nearly everyhting
http://rainerehlert.com/ObsReal14/Re...SCC1-RSCC2.jpg

The software developed slowly as I am no programmer and with the help of a friend in germany I have been improving everything

Here the GUI for switching the hardware mounted on a pier
http://rainerehlert.com/ObsReal14/Remoto/ROR-17.jpg

Now another safety is to know if after switching on a device like tha camera it is really drawing power or not. Therefore I developed so called Currentloop relays using a reed relay and a handmade magentic coil. If current flows a magnetioc field is cerated and the reed relay clsoes and send a signal to the A/D inputs.

Here an image of my archaic relays
http://rainerehlert.com/ObsReal14/Remoto/ROR-18.jpg

Also I needed to know if my power supplies inside the pier cointrol are on and therefore I made another safety switch using a simple optocoupler circuit. If both supplies are running then I get green light. This is achieved by connecting in series the both optocuplers.

Here a picture of that simple circuit
http://rainerehlert.com/ObsReal14/Re...521-1GB-00.jpg

In this case for testing purposes I used a half fried TLP504 on only one channel.

Here the real circuit in the box
http://rainerehlert.com/ObsReal14/Re...Opto12v24v.jpg

and last but not least the view of my desk in my warm room into the cold room

http://rainerehlert.com/ObsReal14/cons/Monitores-04.jpg

The missing 1% is a good bandwidth in order to control it safely remotely

If you would like to have specific info about anythinf just contact me via private message.

Sorrry for the long post.
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  #48  
Old 14-09-2009, 04:37 AM
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ooops

Forgot to add that I also have an AllSkycamera, a Raindetector and a Cloud detector.

Here they are
http://rainerehlert.com/ObsReal14/Re...etector-03.jpg
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  #49  
Old 21-09-2009, 06:49 AM
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kinetic (Steve)
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Velleman Kit app

Wrote a front end using VB studio over the weekend and
got a few devices functioning as inputs and outputs.

Temp readings are simply a voltage divider network
across two thermocouples just to simulate a real input.

In reality, a dedicated temp IC like a LM335 would be used here.

Edit: screengrab background courtesy JJJ's Sagittarius Widefield

Steve
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Last edited by kinetic; 21-09-2009 at 08:01 PM.
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  #50  
Old 21-09-2009, 09:38 AM
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mldee (Mike)
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Quote:
Originally Posted by kinetic View Post
Wrote a front end using VB studio over the weekend and
got a few devices functioning as inputs and outputs.

Temp readings are simply a voltage divider network
across two thermocouples just to simulate a real input.

In reality, a dedicated temp IC like a LM335 would be used here.

Steve
Good to see you're making some progress Steve. The interface looks good. About the level of functionality I'm trying to achieve. I decided to go the arduino route for a trial, and hopefully, with the others also using it, will come up with something there as well.

I'm presently trialling some PWM boards on a small geared motor for remote focusing and a peltier controller for my DSI III. The first focuser mount is aimed at GSO 10:1 crayfords. The next will be for SW ED100 crayford.

Taking lots of photos, so will pass it along when I get something useable. I'm off to get my DSI III rear cover milled for the heat sink today, so will be able to pass on costs and photos soon.

As I'm just too inexperienced at VB GUI's to do much there, much less ASCOM interfaces, I've decided to just go for the XP USB GUI concept at the moment, and if someone wants to do the ASCOM side of things, go for it.

Good luck,
Mike
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  #51  
Old 27-09-2009, 10:19 PM
picklesrules (Nicholas)
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Just my 2c , you guys probably already know this so disregard this post if u do, but if you use a dedicated ob PC, u can add a program such a tightVNC or something to remotely connect to your observatory pc from a remote location such as a house an hr away from your dark site using the internet as the connecter with a VPN software such as hamachi to make a virtual lan over the internet. Which could also be used to recive live views from observatory camera (securtiy,scope) etc.
Good Luck
Nick
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