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I want to build a multi voltage power supply to run scope, cameras, usb hub etc each device having different power requirements
I have done some searching round the internet and come up with the following circuit, can anyone provide any advice as to whether it is an OK design or have I got it completely round my neck (Wont be the first time) I have a 24Volt 10A regulated power supply and was looking to use this as the input.
I am sure I am not the only person to want to do this, are there designs out there, I dont want to reinvent the wheel
Any advice greatly appreciated
1. If the wire to a pair of 12v DC batteries in series is 10AWG (5.3mm2) and is say 2m in length, what gauge and length wire should join the two batteries, or as long as it is at least 10AWG and less than 2m it is unimportant? Are there issues with using thicker wire to join the two batteries together.
2. And if these two batteries were in parallel, what are the requirements of the wire joining these two batteries together? Again, is using thicker wire than the live and positive to the battery pair problematic?
3. And if you can tolerate answering another question, where would you fuse these two set ups?
I'm new to this forum but not particularly new to astronomy.
Anyway, I have an issue and I'm hoping that there is someone here who can help or at least point me in the right direction.
I have a celestron advanced VX which I have now owned for probably 5 years or so, I lost a bit of interest in astronomy so all of my equipment went away and I have just recently started it all up again.
Iwas powering the mount using an RAC heavy duty jump starter, which, admittedly, I haven't been keeping on charge! So there is a fair chance it is dead/on it's way out. So I purchased a talentcell 8300 from Amazon, it arrived today (12th) and I plugged in straight in to the mains to charge up, as soon as it was fully charged I plugged it in to my mount and nothing, literally nothing at all, no lights, no reponse, it's as if I had not plugged it in. So I plugged one of my RAC units in, one of them, when fully charged, will power the mount but not fully, the power LED comes on but the backlight on the HC does not and all I can see on the display is "boot start".
I then tried to power the mount via the same 12v cable as I was using from the RAC units but with the power pack plugged in a charging too, this all worked exactly as expected, everything turned on, I can input into the HC and the motors all respond to input. I have noticed that the power LED on the 12v cigarette connector does dim dramatically as soon as I turn the avx on (when plugged in to the RAC pack).
I purchased the talentcell unit as I had noticed on other forums that people were using it for the same mount, it is rated as 12v and 6A output so all should be ok. I have not had a chance to check anything with my multimeter, and, honestly, I'm not that handy with one!
Any help would be greatly appreciated
Has anyone used the celestron lithium powertank (the small one, not the pro version) with a skywatcher HEQ5?
It looks like it should be perfect but that is coming from someone who is relatively clueless
From the skywatcher specs, it looks like the mount needs 2 amps of current, and the powertank supplies 3, so that should be good?
It also looks like the power cable is a double-ended tip-positive 2.1 mm plug, so i assume that even though it doesn't have one of those 12V car battery inputs, it shouldn't matter right?
(just to save people some time, i'm not going to bother with a lead battery / leisure battery / jump-start pack / etc)
I was hesitant to write this earlier, but I wanted to try all possible ways to get my new SkyWatcher 250P GOTO allgined, but to no avail.
I have followed the instruction manuals of both the synscan and SW, and managed to get the message "alignment successful" multiple times on the handset or the app. The closest I got when I tried to dial a different star was a 20 to 25 degrees off on the azimth axis. Most times it's off by a margin on both axes.
I have tried aligning around 30 times on more than 5 diffrenet occasions, different locations as well. I end up ignoring the thing and switch to navigating manually as the eager friends want to observe instantly, but we ran out of objectes and the planets are not close anymore, so I figured it's time to get deeper DSO's and sort out the GOTO.
Here is what I do:
• I level the scope to the zero reading on top of the base
• I make sure the base is level with a spirit level I bought recently
• I point the scope northish, but latley I bought compass to pinpoint north
• I plug all equipments in and then switch on the power from a lead acid battery
• I enter the date ( US fromat, month before day 😕 )
• enter correct time zone obviously
• the coordinates in the format of E 000 00 , N 00 00
• As for elevation I use "my elevation" app, not sure if it's accurate. Does this entry have to be that accurate?
• I tried both brightest star and the 2 star align methods on the handset (which seems to be the same thing apart from the brightest method having an extra menu asking for which direction you are pointing at)
I even used the synscan app and the synscan pro, and tried the 3 star align method. The app uses location and enters all data automatically
•I use the top and right arrows as the last press before centring the star in the eyepiece as recommended by the manual
These are the steps I follow when I align , is there anythung I missed? Your kind help is much appreciated.
Update: issue solved, check the reply in the second page