One main 12V supply vs lots of bricks?
Posted 11 January 2013 - 09:56 AM
Another way is to simply get a fairly robust 12V DC Supply ( 150W 12V DC Power Supply ) and use something like a simply Arduino board ( Arduino Boards ) and program it up with a relay board to switch separate 12V connections to the respective accessories.
I've been an electrical engineer for 30+ years so programming up an Arduino for me is a relatively simple task. That being said, I've never been one to reinvent the wheel if a reasonable solution already exists.
My thinking is using a 12V supply with the Arduino is probably both the most robust and most programmable. While my AC supply is through a heavy duty Tripp Lite UPS that regenerates a perfect sine wave, the regulation on a dedicated DC supply like I showed is far better than your average brick, which is many cases is not much more than a diode bridge with a cap. That being said, I lack real time experience in this application so I am quite interested in solutions and problems others have overcome and solved.
Posted 11 January 2013 - 10:16 AM
Posted 11 January 2013 - 10:54 AM
Posted 11 January 2013 - 11:07 AM
Posted 11 January 2013 - 11:36 AM
They are RS-232 controlled via this crude GUI I wrote in Visual Basic
This is an older version of the GUI it looks a little different now but I think you'll get the idea.
Posted 11 January 2013 - 12:08 PM
I checked out your web page. Very sweet indeed. I'm just getting started and putting things together. This is item was one of the early ones on a list that looks to be, oh probably semi-infinite in length but fun none the less. Thanks for the input.
Posted 11 January 2013 - 02:29 PM
My observatory is only a few minutes away. Not a problem to go out there and fix something. I have the option to move it to an even darker site. I may do that someday. This is one option I would consider if I moved the observatory. The DSL line you use might be a trip saver for you. It works on a regular telephone (POTS) line. As long as the line is working you have dial tone and can dial into a modem. That modem can be used as a way to get into the system and control power to devices including your DSL modem when your high speed is out.
If you do go with a big 12V supply don't forget sub fusing. I was given a 45 amp supply out of an RV. More than enough power to turn wires into heating elements.
Posted 11 January 2013 - 10:54 PM
Posted 12 January 2013 - 12:08 AM
Posted 22 January 2013 - 08:57 AM
So a dedicated 12V supply and switchable individual routes like the RR is a nice solution.
I'm not remote but I'm slowly setting up my setup as if it was (running from in the house as a dry run) in prep for later.
I also contemplated programming a simple MCU board (my company makes them) as a home-grown programmable switching solution, but decided it just wasn't worth the extra time required when turn-key solutions are there...
Posted 22 January 2013 - 08:48 PM