Author Topic: Power converter  (Read 203 times)

Michael Ritchie

  • Active Astronomer
  • ***
  • Posts: 120
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Power converter
« on: December 28, 2017, 06:55:13 PM »
Hi

I would like to know if anyone did test/try a power converter/inverter adapters for his/her SW/Orion EQ5/6 mount power cable, i found this one from many and i am not sure if they are any good or i will face issues with them.

http://www.ebay.com/...H0AAOSwtnpXoxT6

Hope if i can find something similar that can have kind of shortcut protection, i really don't like to depend on a power pack, and buying one reliable it will be heavy and also pricey, with shipping of those kind of power tanks to me, so i was thinking to depend on my house AC , i use it for my laptop and my camera on the scope, so why not for the mount, i don't use it outdoor far away from electricity resources anyway, let me know what do you think.



Mike Heck

  • Active Astronomer
  • ***
  • Posts: 102
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #1 on: January 08, 2018, 03:18:33 PM »
I haven't used the item you linked to, but its rated output is only 500mA. The EQ6 needs 2000mA, so that adapter wouldn't be anywhere near powerful enough.

‚ÄčAndy.

Edward Johnston

  • Active Astronomer
  • ***
  • Posts: 129
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #2 on: January 08, 2018, 09:33:54 PM »
Quote
I haven't used the item you linked to, but its rated output is only 500mA. The EQ6 needs 2000mA, so that adapter wouldn't be anywhere near powerful enough.
‚ÄčAndy.

Indeed, but i will try something else with more power, i just gave an example, it is any converter not necessary the one i linked to, also there are other type of converter or say different look with a power cable can be removed from the adapter same like laptops ones.

I hope i can find something power enough, but even if i find that one, will it be any good without problems?

blufdestholreng

  • Active Astronomer
  • ***
  • Posts: 133
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #3 on: January 10, 2018, 11:27:30 AM »
This is similar to one I use for an AZ-EQ6, which requires 4A: http://www.ebay.com/...ZgAAOSwDKtY2lk2

That is a 110V adapter. If you need 220V, this one should work:http://www.ebay.com/...Y4AAOSwImRYQU~Y

Andy.

Nong Inthisorn

  • Active Astronomer
  • ***
  • Posts: 123
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #4 on: January 12, 2018, 06:48:17 PM »
Quote
This is similar to one I use for an AZ-EQ6, which requires 4A: http://www.ebay.com/...ZgAAOSwDKtY2lk2

That is a 110V adapter. If you need 220V, this one should work:http://www.ebay.com/...Y4AAOSwImRYQU~Y

Andy.

The second one of 220-240V is in the cart already, but i wasn't sure about it over the first one i posted, but how do you rate it, or what is our impression about it? no issues so far?

Thank you very much!

Michael Postle

  • Active Astronomer
  • ***
  • Posts: 106
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #5 on: January 18, 2018, 12:24:46 AM »
In addition, it is rated at 5000mA, isn't it too much power? i mean i won't over power the mount and may damage it, or more power is fine as long it is not going to fry the circuit of the mount.

geblusandde

  • Active Astronomer
  • ***
  • Posts: 128
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #6 on: January 18, 2018, 04:19:48 AM »
Quote
In addition, it is rated at 5000mA, isn't it too much power? i mean i won't over power the mount and may damage it, or more power is fine as long it is not going to fry the circuit of the mount.


No, 5A is the maximum current that it can supply. If the mount requires less, it will draw less. Besides, the cigarette lighter plug is fused so even if the mount shorts, the fuse will blow and prevent damage. When choosing a power supply, pick one with the correct voltage (no more and no less), and with at least as much current as you need. A higher current rating is not a problem. A higher voltage is a problem!

The first one you posted is not powerful enough and would not have worked. This one meets the power requirements and should work well.

Andy.

Prasanna Patel

  • Active Astronomer
  • ***
  • Posts: 103
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #7 on: January 21, 2018, 06:04:04 AM »
Quote
Quote

In addition, it is rated at 5000mA, isn't it too much power? i mean i won't over power the mount and may damage it, or more power is fine as long it is not going to fry the circuit of the mount.


No, 5A is the maximum current that it can supply. If the mount requires less, it will draw less. Besides, the cigarette lighter plug is fused so even if the mount shorts, the fuse will blow and prevent damage. When choosing a power supply, pick one with the correct voltage (no more and no less), and with at least as much current as you need. A higher current rating is not a problem. A higher voltage is a problem!

The first one you posted is not powerful enough and would not have worked. This one meets the power requirements and should work well.

Andy.
Excellent, then i will order one very soon.

Thank you very much!

enmofinwins

  • Active Astronomer
  • ***
  • Posts: 122
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #8 on: January 21, 2018, 06:57:10 AM »
I have said this many times before... The cigarette lighter plugs suck!!
Use plugs that are meant to do what you are using them for.
Cigarette lighter plugs are springloaded and the chance they work themselves out of the socket is huge. On top of that the contact area is very small because the tip is round. Too much amps running through a too little contact area cause carbonating and are bound for trouble!

contpeeresto

  • Active Astronomer
  • ***
  • Posts: 114
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #9 on: January 21, 2018, 09:13:19 AM »
Quote
I have said this many times before... The cigarette lighter plugs suck!!
Use plugs that are meant to do what you are using them for.
Cigarette lighter plugs are springloaded and the chance they work themselves out of the socket is huge. On top of that the contact area is very small because the tip is round. Too much amps running through a too little contact area cause carbonating and are bound for trouble!


Yes, they're not ideal. Unfortunately, that's what Sky-Watcher power cables are fitted with and not everybody has the knowledge or facilities to modify or make their own cable. Sky-Watcher in turn are just trying to make life easier for their users because most power tanks will have the cigarette lighter socket, and unlike barrel connectors, their polarity is universally agreed.

Andy.

llammenkudi

  • Active Astronomer
  • ***
  • Posts: 127
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #10 on: January 23, 2018, 02:24:36 AM »
Then are there cables like i can connect to my Skywatcher mount AZ-EQ6 to the AC directly without cigarette type? hope if available then i don't need to go with cigarette port then another cord for AC or battery power.

vesceoparrest

  • Active Astronomer
  • ***
  • Posts: 112
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #11 on: January 23, 2018, 03:30:57 PM »
I doubt you'll find anything if your mount uses the newer Skywatcher power plug, the one that looks like a microphone connector. Your best bet would be to purchase a 12V 4A power suply from Amazon, $10, and do some minor surgery on the power supply and mount power cord to mate them.

I'd cut off the barrel connector from the power supply and the cigarette plug from the mount cord. Get some polarized connectors, ie PowerPole (mail order) or XT60 (local hobby shop or mail order), and solder them to the cut wire ends so you can use either the AC power supply or restore the cigarette plug if you end up using a battery sometime in the future.

If you're unfamiliar with soldering and getting the polarization correct when installing the connectors, check for a nearby amateur radio operator who should know how to do this. A local astronomy club should also have at least one member who is familiar with the correct procedure to solder connectors to wires.

Craig Olsen

  • Active Astronomer
  • ***
  • Posts: 103
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #12 on: January 26, 2018, 02:56:29 AM »
Ah i see, no thanks, i will stay with cigarette type then.

anstirabnas

  • Active Astronomer
  • ***
  • Posts: 112
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #13 on: January 29, 2018, 10:08:01 PM »
Quote
I have said this many times before... The cigarette lighter plugs suck!!
Use plugs that are meant to do what you are using them for.
Cigarette lighter plugs are springloaded and the chance they work themselves out of the socket is huge. On top of that the contact area is very small because the tip is round. Too much amps running through a too little contact area cause carbonating and are bound for trouble!

The chances they work themselves out of the socket is zero, in my experience. I've used cigarette lighter sockets on three separate Celestron Power Tanks over 14 years, as well as two Pyramid 5-7A power supplies. This is for astro equipment. In addition, I've used them non-stop to power my cell phones in the car. Never has one "worked itself out of the socket."

Ray Gibas

  • Active Astronomer
  • ***
  • Posts: 131
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: Power converter
« Reply #14 on: January 30, 2018, 07:39:26 AM »
Quote
The chances they work themselves out of the socket is zero, in my experience. I've used cigarette lighter sockets on three separate Celestron Power Tanks over 14 years, as well as two Pyramid 5-7A power supplies. This is for astro equipment. In addition, I've used them non-stop to power my cell phones in the car. Never has one "worked itself out of the socket."

I've had them separate a few times, seemingly by themselves but probably due to cheap and ill-fitting components. I have also had them separate when someone has tripped on the cord, but I was glad that they did so rather than break or even pull the mount over(yikes!). However, I never really trust them for these applications. They're 1950's technology - surely we can do better now.

Andy.