How to use main flight battery for FPV Transmitter

by Bjarkix2 | April 13, 2013 | (7) Posted in How To

So, i think everyone who´s in to FPV has experienced the black flickering lines created from noisy power. The high and inconsistent amperage draw is what creates this noise, the black lines are simply from the power being supplied inconstantly. It is quite simple, and requires these components.    

I have glued the capacitors together, negative side up. making it easier to solder. They are basically small very high Charge/Discharge rate. Noisy power goes in, charges the capacitors, leaves the capacitors again smooth and stable. As to votage, just make sure it is higher than what your battery is and you will be fine :)

Here is the schematic showing how you have to connect everything.  

Soldering the negative connections using a insulated copper wire. 

Soldering the positive, and adding the wires. (keep in mind that their placement is crucial) 

From another angle (red is positive, orange is negative)

Placing it on the plastic board and wrapping it in heat shrink

And that´s it. Put it between you main battery pack and the Video Tx and get a crystal clear image without having an extra battery to carry around for the Video Tx.      

 !Important! The capacitors have to charge up first to have any effect, so wait 1 or 2 minutes after powering it up before flying ;)

I would like to thank David windestall, as i got my noweledge from his build wich you can find here: 

http://rcexplorer.se/projects/2010/01/twinstar-ii-fpv/

And GO FLITE TEST!

 

 

 

COMMENTS

Hasersys on April 13, 2013
Sweet, i have a rf choke that I made using an old power supplies magnetic coil and one cap. It made my un usable main battery usable. I took the old power supply's coil and cut the plastic cover off. Then took some old coaxial cable and stripped it. Wrapped the new coil, soldiered on the cap and now have a perfectly clear usable battery. These are very useful filters. I wish I had more knowledge in the electrical feild to better explain my setup like you have in this article. Nice write up, this really is a simple project that makes a world of difference.
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Bjarkix2 on April 13, 2013
Thanks, i´m glad you like it :) BTW, funny thing is you don´t actually have to know how it works, you just need to know how to put it together ;)
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Atarix777 on April 14, 2013
Great Article, thx a lot :-)
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animan on April 14, 2013
Hello. I looked at you schematic . Normally to get a proper 2nd order low pass filter, the coil is in series to one set of caps that are terminated to ground. This means the left side caps (on your schematic) are not even doing anything, because of the low impedance of the battery before them.
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Bjarkix2 on April 14, 2013
I am not sure what you mean, it works just fine by my experience so far. I used the same basic build as David Windestall did. Could you perhaps send me a schematic of how you would prefer it to be build? and email it to me here bjarki_andreasen@hotmail.com
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mordy on April 26, 2013
Hi there, do you have an approximate value for the coil ?
is it around 1000uH (1mH) thanks.
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Bjarkix2 on April 26, 2013
i have no idea, its just inducted 0,5 mm wire, 1,5 m long. didn´t go into that much detail ;)
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mordy on April 27, 2013
That's okay and no worries, because if you got good results with that setup then all okay I'll just follow the same technique.
Thanks very much
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MoRaLeSD on March 11, 2014
May I ask how to use the GoPro2 for FPV camera and get rid off the static line? The Problem is that I power the battery from the internal one and not the main battery yet I get some noise in the video!
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Bjarkix2 on March 12, 2014
im not sure exactly what you mean. can you be more specific on what powers what. it is hard to tell from what you wrote ;)
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How to use main flight battery for FPV Transmitter