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By Colin Bourchier
Hope you are all well.
Trying to set up my new telescope and mount. I have a EQ3 Pro - Synscan. I have a wall plug that provides 12v 3A 36W. Will this be enough to run the slewing and synscan system with hand control connected?
Thanks in advance for any help on this. Can't wait to star getting some good pics.
*any mods - not sure if correct section to post? - feel free to move if not 👍🏼
I’m looking to power a mini pc/Intel NUC whilst out in my camper van.
It will need 19v , upto 5A
I have a big leisure battery setup (220ah) so powering it isn’t an issue.
Trying to find some sort of 12v to 19v 5A converter is...I’ve seen cheap ones for a fiver and those buck converters but I’m not trusting that to power an expensive PC
Is there anything like a Pegasus pocket power box that has a 19v DC (smoothed and reliable) output anyone knows of?
Even a ‘branded and reputable company’ made 12v to 19v laptop charger maybe?
I know many will reply saying why not just use a laptop????
This is a mini pc designed for acquisition AND editing.
I could just buy a laptop yes, but £ for £ they are over priced and underpowered, last around 2 hours until needing a charge and I don’t need a screen as I have a 27inch monitor/tv already installed in the van (luckily enough this takes a 12v DC input so no messing around)
My current home pc isn’t suitable for editing anyway so my plan is to build a system that is capable of doing the job of a cheap acquisition stick pc/mini pc and also powerful enough to edit.
Intel NUCs are brilliant for this job...I can use in the van to get the data and easily take inside once home to process.
i could build a do it all NUC for around £500 ...a mini pc for acquisition and then a full desktop pc as well for editing would be at least a 1/3 more.
If anyone has any experience powering something like this directly using a converter .. Or even uses a 12v DC car laptop charger that outputs 19v and is reliable please let me know.
How do you guys power laptops if using out in the field/star party’s etc without a mains hookup? 👍🏼
What is your experience with the small Tracer 12v lithium batteries?
My new manually driven dobson will have a mirror cooling fan and, although I might not using it, I would like to think ahead about potential power sources.
What are your recommendations for a small power supply?
I am about to build an EQDIRECT adapter to connect my laptop and HEQ5. I have a notebook docking station with good old serial port (I tought) so I planned not to struggle with usb to serial port finding, porfilic or FTDI, etc... BUT(!) make my own cheapo EQDIRECT.... Unfortunately I am not an electrical genius, but I learnt somewhat. And as I read the schematic a bit closer, I had a bad feeling about connecting the ground of the notebook serial port and the mount ground potential. Then, I aimed this topic in searching, and I found some issues that might be in connection with that. Now I am a bit afraid to buildmy own, based on the given schematic on the EQMOD website. (no offense) So I tried to figure out how to avoid problems with grounding. Here is what I came up with. Maybe it is an ... how to say ... overkill, but I do not want to be the one in the million, who burt his mounts' electronics becuse of a ground loop. I hope that there is somebody around with more electrical skill, who can check it and tell if it is a complete non sense idea or...? Some explanation: As I read, connecting the grounds no problem in case of batteries, or between DC power supply and batteies but two not well chosen DC power supplies are able to make some serious smoking... So I implemented an intermediate battery powered stage, which is in connection with the notebook RS232 line only, and the mount is fully isolated from those by optocouplers. Ah sorry! I just saw when I uploaded the pic, that possibly the optocoupler output signals must be inverted. While for example logic 1 from the mount would give logic 0 on the MAX232 input. So the other pin of the optocoupler should be used for reading the proper values, and pull down resistor instead of pull up resistor... but the principle of a battry powered "insulation" is the same. Well, some batteries and the circuitry still much cheaper than a new mount/laptop... what do you think? I appreciate all your comments!