Running a Sesto Senso 2 with a cheap 5v usb to 12 dc cable

It will work as long as it can deliver a minimum of 1A. Not all laptops can do that reliably. I'd rather get an external power unit, with 3A just in case.

I would be pleased if you share your experience with the Sesto Senso 2 at some point in the future. Later this year I may upgrade to an electronic focuser too and the Sesto Senso 2 is on my list of candidates too.

Clear skies
Wolfgang

The Sesto Senso 2 is excellent but you don't need an Eagle to power it. I'd also recommend an external power supply. I use a Pocket Power Box Advance but have previously used a 12V external supply.

The cable won't provide any power - cables don't - but it is rated at being able to carry 2A. If your PC USB circuitry can't provide the required current to produce 1A at 12V (which by my maths is 2.5A at 5V) then you are likely to fry your USB port. If you use a powered USB hub, check if it's rated for 2.5A+. Even so, you are already over your rated amperage for this cable. Would it not be easier to use an external supply?

Padraic Moran:
The Sesto Senso 2 is excellent but you don't need an Eagle to power it. I'd also recommend an external power supply. I use a Pocket Power Box Advance but have previously used a 12V external supply.

The cable won't provide any power - cables don't - but it is rated at being able to carry 2A. If your PC USB circuitry can't provide the required current to produce 1A at 12V (which by my maths is 2.5A at 5V) then you are likely to fry your USB port. If you use a powered USB hub, check if it's rated for 2.5A+. Even so, you are already over your rated amperage for this cable. Would it not be easier to use an external supply?

Seems it would be easier. 
power management isn’t exactly my thing 😅
i also plan to buy a pegasus astro box. 

Andy Wray:
As previously stated:  please be careful as you will need 2A or more at the USB end to supply the 800mA at the 12V end that I believe this focuser needs.  Technically the cable says it can handle that as long as your USB port/hub can.  

Out of interest?  Have you considered the ZWO EAF 5V?  It uses only one standard USB2.0 cable to provide both power and autofocuser control and is considerably cheaper than the one you are looking at.  It can also be connected to and powered by many ZWO and other cooled cameras that have USB ports built-in.

Here's a picture of it on my rig:

I considered the zwo eaf and maybe, just maybe i will get one but i like that the sesto senso is more accurate. 
this will be my first eaf and i have no clue if the theoretical higher accuracy of the primaluce product has any advantage over the zwo in practice but as long as i don’t find a concrete answer to that i will rather go with the sesto.

i have no clue if the theoretical higher accuracy of the primaluce product has any advantage over the zwo in practice

The problem with the "theoretical higher accuracy" is that primulace states a precision of 0.7 microns which makes no sense as it can't control the number of microns as the gearing depends on the telescope's focusser.  The ZWO quotes that it has a 7.5 degree stepper motor that is reduced by gearing by a factor of 120.  i.e. it can rotate the coarse focusser by 0.0625 degrees. That makes a lot more sense to me as I can relate to just how fine the moves on the focusser are.  It means the ZWO turns the equivalent of 0.6 degrees steps on my Crayford fine (10:1) focusser knob;  I know that that is a factor more accurate than I could ever achieve by hand.  In fact, most auto-focussing software will never even be able to nail the focussing to within one step anyway as they use a curve fit to estimate the focus point.

Bottom line:  they will both do the job and have other strengths and weaknesses (mounting options, power requirements, wifi access etc.).  I personally went for the ZWO as I knew it would hold the load, didn't need a power supply, I knew it would fit my scope and would be able to focus much better than I ever could.

One real positive of the primulace product is that is much faster at moving the focus point;  that said, the autofocus routines used by most software (e.g. APT) spend much more time capturing frames and evaluating focus than moving the focus point. Also, it doesn't need a mounting plate and you can still focus manually using the coarse focus wheel which you can't do on the ZWO.  One thing the ZWO does is hold the focus point with what feels like a grip of steel which is definitely a positive.

I would obviously highly recommend the ZWO, but I'm sure you'd be happy with either.