Turnigy 9x - Frsky DHT Module Telemetry Hack without RS232 Converter

I'm having this transmitter for quite so long which i bought from a friend. All this while it just been used by my son to control his RC Rover as i don't trust the stock Tx module on the transmitter for my flying. Until i build my tricopter and then my quadcopter. Flying a multirotor need us to be aware of the on board voltage while flying to a void any mishaps.
As i have done a mod to a friends Flysky TH9x with a Frsky module giving him a means to monitor his voltage on board through telemetry, i decided to mod my Turnigy to do the same but this time using a Frsky DHT DIY module.

How To - Servo 360 Mod

I get a lot of question as to how i did the servo mod for my rc rover. That is involving modifying a normal 9g servo to be able to turn freely on both direction.
I got the tips from a youtube channel rctestflight which happens to be the same person i got the idea to build the rc rover. The build is really cool (you can ask my son) and the modification needed is simple. Anyone with a spare servo and couple of old broken one could easily make it.

Running Turnigy/Flysky 9x on 2s 7.4v

I found out from the reading that i've done that the Turnigy/Flysky 9x transmitter can be operated using just 2s 7.4v lipo setup. Which result in no less the performance of the one with a 3s 11.1v battery. Provided you have flash your transmitter with the custom firmware ie. ER9x. This is due to the option to set your transmitter low battery alarm which you can't achieve with the stock firmware.

Because I'm cheap and I have a couple 2s lipo around, I did this simple mod to the battery balance plug so it can be used directly in the transmitter.

Flysky TH9X ER9X FrSky Telemetry Conversion Without RS232 Level Converter

I've been saving this mod for my friends quad while waiting for his  new FrSky modul (FrSky DF 2.4Ghz Combo Pack for JR w/ Module & RX) as the stock modul has raised doubt of its reliability for us who fly at Ampang area. There has been a lot of reports from fliers using Flysky and Turnigy 9x having problems with the stock modul.

FrSky has made a reliable modul for this TX at an affordable price which come with a telemetry capabilty. You will need a telemetry ready RX from FrSky to make use of its function and a couple of sensors with its FrSky DHT-U Telemetry System to display all its telemetry information.

With Flsky/Turnigy 9X flashed with custom firmware such as ER9X, we can have all the telemetry data directly on our TX screen without the use of DHT-U. That's awesome. Now get your soldering iron heat up.

FUTABA 7CHP PPM/PCM 2.4GHz Conversion Using FrSky DHT 8ch DIY Module

After my previous Backlight Mod, I am thinking of upgrading my 7CHP to a 2.4GHz but want to have the capability to switch to my old trusty 40MHz which i have more than a couple of RX around that i don't want to waste. So i remember seeing a video posted on Flitetest regarding such modification and found it on their website -> DIY 2.4Ghz Radio Upgrade on Flitetest by David Windestal
David are known for his work on RCExplorer have done a great job describing his way of modifying his 72Mhz 7CHP and here I am not trying to do a how to for this mod but instead just trying to share how i did it by using David's article.

Futaba 7CHP PPM/PCM Backlight Mod

I've been using this radio for so long from the time i got my Thunder Tiger Mini Titan 450 6ch RC heli about 4 years ago which i got it second hand from a friend. Since then it has been my primary TX for my aircraft.
  As for this couple of years, i'm active in our night flying activities which is held every Friday night at  a public field about 20 minutes drive from my house.
  The thing is, its hard to do some adjustment to my TX setting at night without a backlight on it. So i did some searching and found a way to have a backlight on my ol TX.

Skyartec Mini Cessna Stick Mod

Skyartec Mini Cessna as i was told by its owner Mr Sopi and he has given me an opportunity to try n figure out how to modify its transmitter which is in mode 1 to mode 2.

Figuring the mod at the field and double checked by my fellow flyer Mr Osman. I brought the plane home with full permission by its owner to do as i like as long as its change to mode 2.

Here how i did it ...

9xr Battery Connector Mod

Flysky TH-9x Hacked with ER9x

The power of internet...

It all started when a friend of mine asking me to setup his Dji Naza-M on his 450 frame quad copter. Needing a 3 position switch, he opted to buy a new Flysky TH9x because its 9ch and its cheap.
Problem: Mixing a function in stock TH9x is a nightmare. The need to create a failsafe/return to home switch faced a failure due to stock firmware bugs in mixing.
Action: Flash its firmware to custom ER9x which is a godsend for diy rcers. The new firmware has make it a totally new tx inside but still the same on the outside.

Mod: Firmware flashed using arduino uno. Backlight ER9x controlled. Speaker and haptic vibration feedback.

Handy DC to AC Tricks

Ever wonder how u gonna use your hotglue or even your soldering iron @ the field with no power supplies.  We rcers actually loaded with 12v source - lipos. So for those who still wondering, The answer is 'use your lipos'. Read more if you want to know how ...

AXN Floater / Cloudsfly

Looking for something out of the box for me to enjoy on my weekends in the field, I lay my eyes on this nice little power glider n from the look, I know im going to enjoy it.

Esky Nemo

Hi guys. Wanna share some mod and settings that I’ve made to my e-sky nemo airplane. some that u guys might find useful and some I do just for experimental purpose or just for fun. This plane is a nice foam plane, although the made are not so scale looking, but by using epp as building material, this is one tough plane for someone who crash a lot. And I mean crash not loose it. If you loose it, just buy another one .[@more@]

Personal Videographer

ever wanna record ur flight but no one to help u with. or if there is someone, u dont trust him/her enough to help u. tired of missing a shots or aircraft out of frame? if so, u might wanna try this. worked if u r using a digital camera to record ur flight.

HBK2 Battery Tray Mod

i found this mod on rcg. mini titan style. some how it improves my hbk stability. easy to fix and secure the bty as well. how ever got to put some effort on putting the canopy on.

i use a piece of hardboard, cabletight it to the body.

before:

after:

HBK2 Tail Pulley Mod

on my early days with my hbk2, i kept having promblem with the tail belt keep slipping frm the pulley. hover once, fix once, hover once, fix once. fed up with all the touble, i search for a solution in the net.

the pulley somehow is not low enough to hold the belt in place. so the solution is to lower it. i used a spacer for that.