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Vtx questions (eachine wiz)
#1
Hi

I am going to add a Runcam Swift 2 to my eachine wizard and i have a couple of questions as the beginner i am...

First of all; can i supply the stock VTX directly from a 4s?

And second; i am also adding a LC filter in the process before the whole Video system. Can I collect the osd voltage sensor (vbat) after the lc filter and still get the correct value? Or should I collect it before the lc ?
#2
hi Johnny, welcome to the forum. as for your question i'm not very familiar with that quad, but from looking at some of the details on BG. you should be ok without the LC filter. is there a reason why you are going to add one?
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#3
Hi Thanks Smile

To hopefully clear up the image and maby add some protection from voltage spikes.
Also, the weather herr is awful and i like to fiddle and mod with the quad so i need some simple ting to learn on. Half the fun is in building and modding.
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#4
Unless you already have a poor image, I wouldn't bother. I've built a few and never had to add a filter. IMO most people that have problems with poor image is simply improper routing of vtx wires
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#5
so very true about half of the fun is in building and modding. plus messing around with inexpensive rtf quads are a great way to learn. but you have to keep in mind that you're not going to get a great picture with fpv. it kinda like watching a tube tv with bunny ear antennas. 
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#6
and to answer the question "can you power directly from 4s to vtx":
ofcourse you can, in some cases you will just see it burned Wink

not trolling any longer, check the specs on the vtx if it can handle the 4s input and add low esr cap to kill the spikes. this should get you going.
All the best
Grzesiek (Grisha/ Greg)

Curently flyable: Nox 5, Nox 3, Minimalist 112, Scrap at the moment... nothing is flyable
Bench / in progres: fixing Nox 5, Nox 3, Minimalist 112, Scrap
thinking about building: 450

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#7
(12-Jan-2017, 12:19 AM)Grisha0 Wrote: and to answer the question "can you power directly from 4s to vtx":
ofcourse you can, in some cases you will just see it burned Wink

not trolling any longer, check the specs on the vtx if it can handle the 4s input and add low esr cap to kill the spikes. this should get you going.

i think he meant for voltage display on the osd. the new runcam swift 2 has a vbat input which hooks up directly to the positive of the lipo for vbat sensing.
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#8
Thanks for the answer guys.
I know the image is of poor quality vs a HD camera but its fun to have something to do.

I have this idea of making the video system attatched to the top plate and it splits of directly from the incoming powersupply. Creating some space from all other electronics.

The vtx have a operating voltage from 7-27v so i guess it should not be a problem vid a 4s battery.

I have orderd a LC filter from bg, what is the diffrence from a low esr CAP and a LC filter?
Could you maby link a low esr CAP?
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#9
27v should be good as long as you will kill the spikes using filter or capacitator.

there are known esc that generate a lot of noise and jumps of V are quite high sometimes they fried the VTX/Cameras as they were fragile equirement
All the best
Grzesiek (Grisha/ Greg)

Curently flyable: Nox 5, Nox 3, Minimalist 112, Scrap at the moment... nothing is flyable
Bench / in progres: fixing Nox 5, Nox 3, Minimalist 112, Scrap
thinking about building: 450

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#10
Thanks. Will try adding a LC filter and se what happends.

Also, if you guys can help me,
Is there a switch or similair in BLheli suite you active for multishot or is it the whole software that is adapted for multishot?

Havent found a guide whos abit up to date.
Im thinking of updating to betaflight 3.1 and The esc to most recent with multishot.
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#11
I would recommend blheli gui for chrome. You can choose firmware from a drop down menu.
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#12
Here is some low esr capacitors:

http://m.ebay.com/itm/1000uf-25v-105c-Lo...nav=SEARCH

Remember to use good quality capacitors. Panasonic and rubycon are known to be good as well as others, but I know only those two. I use 470uf capacitors on each esc, but I heard people have had good results with just one 1000uf on the battery pads
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#13
http://m.banggood.com/L-C-Power-Filter-2...29694.html

Is this any good or should i go to the local electronics store and build one my self?
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#14
The one you linked is very good.

Just make sure to power it from 12V because the capacitor is rated at 16 V
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