3nslav3's overpowered antenna mod (-55dB 181m and going)

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3nslav3
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 02 Feb 2013, 20:43

garrock wrote:
3nslav3 and Daza .... IMPORTANT... About the Wheel Antenna:
    Keep the two tiny via holes in the ground ring of the Wheel Antenna clear and free of any solder.
    Those two tiny via holes act as a tuning capacitor at 2.4gHz to optimize the SWR.



Thanks for the info! 1 of my wheels indeed as these holes filled with solder but i can desolder it so no problems ;)

I also managed to say goodbye to the error rates!

placing a high powered antenna inside the drone is asking for trouble!

since I've been using the mast system most of my link quality errors went away! (even at close range and using the boosted phone + boosted drone)

foam, carbon, electronics in the drone all absorb the 2.4 Ghz band, the more TX power, the worse the link quality took me some time to figure out but now I know why the mast works 10 times better then just installing an internal antenna, this also counts for the RC guys with 2.4Ghz FPS systems... put the antena as far away as possible from electricity conducting materials (anything that heats up, reacts in a microwave oven)

link quality test in my garden (Highly populated wifi enviroment):

samsung GS3 + 500mW booster with inductive pickup antenna + 3dB TX antenna
Drone with 3dB antenna + 500mW booster
http://youtu.be/QTJH0S-lGzQ

Direct link: http://www.youtube.com/v/QTJH0S-lGzQ
the weird image is caused by the IR lens, the drone was all over the place due to the 20MPH winds ;)

next thing that I'll be working on is a wheel mast system ;)

just waiting for a new batch of RG178 cable to arrive (should be here within a few days)


some weight info on my antenna's:

3dB + SMA: 4,5 grams
5-7dB + SMA: 14 grams


as soon the wind calms down I'll be trying to break the 200 meter barrier ;)

3nslav3
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 03 Feb 2013, 19:48

since they are forecasting bad weather with lots of wind for the next week.... ruining my plans once more to break the 200 meter record => I've ordered a go pro 3 black edition (it's very light with amazing image so why the hell not)

-make a cheap batterie delete cable + post a how to (might use a DC-DC convertor or use the onboard 5VDC of the drone)
-make a cheap ass go-pro mount
-make a wheel mast

the drone will look like:
Image

with a go pro hanging unterneath it :lol:

and I've wanted to thank the people who allowed me to steal their ideas to make these mods possible + come up with my own creations (like the phone booster):

DBS: brick design + wifi mods + IR filter removal
Scubasteve: brick design
Garrock: wifi mods
Daza: ideas

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby Dronecrasher » 03 Feb 2013, 20:57

:lol: :lol: :lol:
r u using bigger motors 3nslav3
mine wont even lift off
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby Dronecrasher » 03 Feb 2013, 20:58

because it's a wagonlol

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby DaZa » 03 Feb 2013, 22:45

Image

3nslav3
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 07 Feb 2013, 16:16

Got the GO PRO hooked up on my drone :D (weight is 506Gr with gopro batterie inserted)

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+ the needed weight reduction on the detachable and adjustable angle mount ( 20 grams )
Image

this wouldn't be possible with a stock bottom plate tho... (weight of the plate without booster is 4 grams => cutted out some stuff)
and the booster heatsink has been reduced (hopefully it wont catch fire :lol:) but my testresults are good ;) )
Image


and this is something that I'm very pissed off about:

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-6 gram "batterie delete" cable with DC-DC convertor providing 5VDC @ 1Amp => DOES NOT WORK ON THE GOPRO HERO 3 BLACK EDITION
(I also emailed gopro support asking if it is caused by the gopro firmware but they told me it just can't work.
so how the hell is scubasteve running his gopro hero 3?!? (or does the cable work with the white and silver edition?)

I also tested a different USB cable without convertor but with a 5V 15 AMP psu but it also doesn't work (the gopro boots up but it can't see an sdcard)


still windy as hell.... it has been windy for a month now -_-

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby garrock » 07 Feb 2013, 17:12

Damn!!!

It seems that weight and power consumption increase as functionality increases.
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby ScubaSteve » 07 Feb 2013, 17:29

Our battery delete cable should work fine. I spent time researching how to wire it to work with the go pros, before I started out making them I emailed Go Pro asking if it should work and got the same answer, no it wont.

But I went ahead anyway, and made it work, when making them i have to wire very specific usb pins otherwise the camera just goes into USB connection mode. I emailed them back with my results and they were surprised even asking me to email their tech guys with how I did it
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 08 Feb 2013, 19:00

finally a day with "less" wind, here is a vid of the first gopro flight:


Direct link: http://www.youtube.com/v/gJR20ckyd40

http://youtu.be/gJR20ckyd40


-wifi signal is perfect, error rates are perfect! , can't be any better!
-only the controls weren't good (deadzone to big + very sensitive gamepad setup for this kind of weight)

up next:
-more weight reduction
-external gopro powercable that will hopefully work + howto (already have a workaround using a "dummy batterie" with a weight of 6 grams)

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 11 Feb 2013, 22:55

small update on the detachable and angle adjustable gopro mount:

Image

weight: 16 grams
-removed more material

and you get a better view on the nylon screw ;)

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 14 Feb 2013, 23:06

ScubaSteve wrote:Our battery delete cable should work fine. I spent time researching how to wire it to work with the go pros, before I started out making them I emailed Go Pro asking if it should work and got the same answer, no it wont.

But I went ahead anyway, and made it work, when making them i have to wire very specific usb pins otherwise the camera just goes into USB connection mode. I emailed them back with my results and they were surprised even asking me to email their tech guys with how I did it


your very specific pins are just pin 1 (5VDC) and pin 5 (GND) I was very pissed off after I asked for your help about the USB power, even after I mentioned the pinout that I was using but you kept going that it is a secret and that I should buy a cable from you...

I did buy a cable because I coudn't figure it out... only to discover that I was already using the same pinout like your "batterie delete cable"

in the end it's just a stock USB cable with a 10$ 5V BEC connected onto it ;) nothing special or something that engineers would break their heads on

pinout mini USB plug:
http://www.cpkb.org/images/thumb/3/31/Miniusb_pinout_2.JPG/180px-Miniusb_pinout_2.JPG

Image

A stock USB cable has 4 wires into it with a specific colour code:
Image

enough about USB... lets get this gopro camera working:

2 things you can do:

1. Use a dummy batterie + USB cable

Image

this is a very light 150mAh lipo batterie that replaces the heavy original hero 3 batterie + powed on USB you'll get a lighter setup then using the stock batterie without USB cable

2. Make a batterie adapter so the hero 3 thinks that it is running off a normal batterie

the hero 3 has 3 pins that connect with the batterie (the pinout can be found on the batterie itself ;) )
pin1: GND
pin2: Temp resistor (to warn the camera if the batterie is overheating)
pin3: 3.7VDC (fully charged the batterie is 4.2 - 4.1VDC ;) )

Pin2 doesnt need to be connected to get this to work (you can always use a 10K resistor and connect that to the GND but there really is no need to)

what you need:

-A 5VDC DC-DC convertor or BEC that takes 13-10VDC input (the BEC from scubasteve's cable will work fine however a tracopower DC-DC convertor might be lighter => it has to be able to deliver at least 2 amp
(startup current of the gopro is high, after it's started up it will only consume 0.5Amps)

-A diode with a forward voltage of 0.8V+ (make sure it's rated for 1amp)

-pre drilled prototyping PCB board

-a way to connect to the gopro batterie contacts (i used spring loaded gold plated pins from ingun)

what I've come up with:
Image

PCB with spring loaded contacts from "ingun" http://www.ingun.de/ (will provide ordernumbers tomorrow)

simple schematic:
Image


more pics:

Image

Image

Image

I did add a small diode on the input as a reverse polarity protection ;)

I've made this for the DIY people here... not to make money from,
this is a mod community, we mod, we share, we help

weight: 7gr :-D
Last edited by 3nslav3 on 15 Feb 2013, 11:15, edited 1 time in total.

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby DBS » 15 Feb 2013, 00:53

3nslav3 the Cable Guy!!!
Image

Sometimes you just amaze the $hit outta me bro!!!

Totally Impressed... :ugeek:
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby DaZa » 15 Feb 2013, 03:40

Yeah that's one hell of an idea!

3nslav3 = The Cable Guy LOL

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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby Dronecrasher » 15 Feb 2013, 03:49

i like to call him "GENIUS" lol

3nslav3
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Re: 3nslav3's overpowered antenna mod (-55dB 181m and going)

Postby 3nslav3 » 16 Feb 2013, 14:12

lol Thanks guys :D

I've just finished the external power mod for the hero 3:

small 12VDC power connector for the gopro: (no usb cable anymore) => there is a polarity protection inside the gopro (diode)
Image

weight drone without gopro:

Image

weight adjustable angle mount + gopro + dummybatterie (all the electronics to step down the voltage are in the batt compartiment)
(see my last post before this one)

Image

total weight: 410gr + 75gr = 485gr = below the critical 490 grams 8-)

not much wind right now so I'm out flying :D
Last edited by 3nslav3 on 16 Feb 2013, 14:49, edited 1 time in total.


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