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DirtyDovi's blog
Posted by DirtyDovi | Jul 19, 2014 @ 11:58 AM | 1,224 Views
DIPOLE TO RH CP CLOVER LEAF / SKEW PLANAR WHEEL ANTENNA MODS:

DIPOLE TO RIGHT HAND CIRCULAR POLARIZED ANTENNA MODS [CLOVER LEAF AND SKEW PLANAR WHEEL] (3 min 37 sec)





When I got my paws on my FPV gear,
I tested out range with the stock dipole antennas..
They weren't terrible, but, they weren't great either.

After that, I ordered a few sets of Circular Polarized antennas..
The 1st set are the opened top version Left-Hand CP though..
The 2nd set are the capped top version Left-Hand CP [Most Likely]

I 'think' that I saw an improvement, however,
when I tested out the visual clarity of the audio and video feed,
I saw some static and drop-outs when going through 'obstacles'..

Yup, 5.8ghz

So, after that, I wanted to try my luck at building a set,
but, I didn't have the $ or the access to any RP-SMA connectors..

A few days go by - I get an idea..

Convert the Dipole antennas to RH-CP [Right Hand Circular Polarized ]

Here are the photos from my mods build:



Sam -

I'll be testing them as soon as I can,
and I'll be sure to leave updated info -...Continue Reading
Posted by DirtyDovi | Mar 06, 2014 @ 11:42 PM | 3,058 Views
Mini Crow Mock Up And Build



Mini Crow 3D Printed Mini H Quad for FPV
http://www.flitereport.com/store/min...-quad-for-fpv/

BIG THANKS to Julian aka JJMelo!

==========================

Now - Lets get to the mock-up/build -

The OE frame setup weighs 73 grams.
With my mod, the weight is 100 grams.

The OE frame has the arms sandwiched between the lower and center plates,
and bolted directly to the two.. This is fine, but, I wanted to have a bit more room.

The OE frame has the ESCs mounted on the arms..
I'm hoping to mount the PDB and ESCs in the new lower/dirty section -
[This will depend on configuration, positioning, and size of the components]
[I also have an LED harness that I would like to try to fit in there. We'll see.]

To do the mod, I used [12] 10mm standoffs - 3 per arm,
and mounted them between the top of the arms and the center plate..

The rest of the [upper] frame assembly is pretty straight forward..
The OE setup uses [4] 31mm standoffs 1 on each corner of the center/top plate..
I added [4] more standoffs.. 1 on each end/side..
I figured that this would help the overall rigidity of the frame..

The plates are 3mm in thickness - The arms are 5mm in thickness..
The frame is now super-solid.. Probably over-kill, but, go big or go home.

The material is PVC, so the arms have a bit of 'flex' . . .
This is probably a good thing in the event of a crash . . .

Speaking of the arms . . .
Julian was nice...Continue Reading
Posted by DirtyDovi | Jan 30, 2014 @ 09:15 AM | 1,917 Views
Cardboard Chaos!

As usual, boredom and sleep deprivation triggered a few ideas..
I hacked the arms off from the 'esc-integrated-pcb-quad'
with the intention of using them as spares for the good one..
But, then I figured I might just build a little H-frame to stick them on -

For now, just tinkering, and trying out a few different configurations -

Specs:

Arms: RCX/ZMR [PCB]
Bottom plate = 10" x 3"
Center plate = 7" x 3"
Top plate = 3" x 3"
Arm angles = 160*...Continue Reading
Posted by DirtyDovi | Jan 27, 2014 @ 07:40 PM | 2,094 Views
I figured I'd get the KK2 board modded up
with as many extra features as I could . .

I soldered a JST connector to feed voltage into the board,
and now, it will read out the input voltage on the screen..

Also, the low-voltage-alarm features are now active..

For those, I made a harness with a beeper and LED
so I'll get both an audio and visual indication
when the pre-set voltage gets too low..

Here are the photos I took along the way -...Continue Reading
Posted by DirtyDovi | Jan 26, 2014 @ 11:51 AM | 2,588 Views
I've had my TH9X for a while, and enjoyed the OEM firmware..
Like many transmitters, the firmware can be the weakest link,
so, I finally broke down, modded it, and flashed a few new ones -
Lots of people rave about ER9X and Open9X/OpenTX,
so that was the order that I tried them..

My quick thoughts?

FlySky firmware is without a doubt 'the best' for a beginner!
IMO, it is also perfectly fine if only being used to fly multirotor crafts..
Sometimes - Simpler Is Better.

ER9X firmware - Definitely a step up, and kicked things up a notch..
More configurations, More settings, More 'in-depth' [for lack of better wording]
Programming takes a bit to figure out and get used to, but it's not bad..
Programming is mostly straight-forward, and still somewhat user-friendly.

Open9X aka OpenTX - Yet another step - But a step 'up'? I'm not sure..
It's another variant of ER9X, with many of the same features and then some..
It's an optimizeable setup that users can tweak depending on their setups..
Setups as in: Hardware, Firmware, Options, etc.
While the previous firmwares were somewhat straight-forward / user-friendly,
IMO, this one is not. While it offers the same features,
trying to figure out how to write them / use them is somewhat ridiculous..
Important/Simple things like 'throttle cut/hold' is not found..
It has be done by fumbling around with different settings and values..
The first time I figured it out and tried it out,
Throttle cut/hold...Continue Reading
Posted by DirtyDovi | Dec 25, 2013 @ 10:23 PM | 2,594 Views
This years x-mas gift from my sister - A brushless miniquad.

L-O-N-G story short . . . Component integrated frames are JUNK -

The top MOSFET on arm # 1 nuked, and the quad is now unflyable.
Damage occurred while trying to re-calibrate the ESCs in Arduino -

Here on out will be my ramblings, and some progress - Or lack thereof..

To be continued . . .
Posted by DirtyDovi | Nov 29, 2013 @ 07:24 PM | 1,878 Views
I have been going out of my mind bored lately..
After some rummaging around, I found some parts
that I thought might make up a fun little H-copter build..



Semi nuked RC Eye One FC, TX, and motors
and.. uh.. yeah.. some tongue-depressors.

Maiden Flight: Modes 1 and 2 where a no-go.
Rough weighing says OEM EyeOne = 2.5 oz
Rough weight of the H-frame is about 2.75 oz
Mode 3 - Takes right off, and flies like crazy!

Wiring is now all cleaned up,
and held in place with spike-tape. Lighter option than zip-ties.

...Continue Reading
Posted by DirtyDovi | Nov 02, 2013 @ 08:19 AM | 2,793 Views
This past year,
I had a handful of micro / mini quads, and not one of them made it out unmodified.
There's no doubt that it was just as much fun tinkering on them as it was flying them!

I figured that I'd throw this blog together to compile some of the descriptions and pics:

Enjoy!


Sam -

____________________________________
Youtube videos I shot of some of these builds -
http://www.youtube.com/user/DirtyDovi/videos
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RC Logger - RC Eye One



Within minutes of the quad being out of the box, and maidened,
it was game over. A defective RX or TX led to a crash.
[6 feet up to the grass led to a broken frame. Buzz-Kill]

The RC.E.O. on the operating table



While down for the count, I also figured I'd mod the bottom..
I added a base for Velcro for the LiPo, and a heli landing skid

...Continue Reading