Arduino based RC flying projects , closer look - RC Groups
Thread Tools
This thread is privately moderated by remzibi, who may elect to delete unwanted replies.
May 19, 2011, 06:26 AM
Registered User
remzibi's Avatar

Arduino based RC flying projects , closer look

Lastly I was a lot involved into use of Arduino IDE , for some devices based on Arduino .
In closer look of Arduino I have followed conclusions .

Fusebits of Arduino MCU are set for home play with MCU by young hobbyist - but not for RC use in jammed and glitched environment , as for sure is ESC , some radios , cameras step-up converters , Video TX , etc. etc.
So what we got :
- ext. crystal (low power) - Unfortunate clock will work badly in environment what are jammed and glitched and power is not good quality and noisy , RC is exactly such environment .
In this cases manufacturer recommend Full-Swing Crystal option to avoid any problems .

- Brown-out detect is 2,7V , so it should be at 4,3V . In so low power , MCU just "play" that working correctly but it not . In case of communication cable are in , MCU alredy start clock running and can case bad memory and counting malfunctions . MCU should start only when the battery power is connected . In old days when was used RS232 and MAX232 chip such problem doesn't existed , but now USB cable have as normally 3,3V pull-ups on TX RX lines - what in fact made MCU to work .
That can explain why Arduino use for programing special FTDI cable with DTR signal to bypass this issue , except of commercial reason .

- Bootloader 2048kb size , there are smaller exist . Need to use special cable with DTR signal - that bad . There is not problem if on the board exist FTDI chip - but if not there is complication . Personally I have not such working cable .

So I decide that all of this can be repaired .
At first fuse bits must be set in proper way for use in RC environment .
So we set : :
- Brown-out Detect 4,3V
- Ext. Quartz in option of Full-Swing

To do that we need ISP programmer , along with ISP opportunity we can use smaller Bootloader - in this case Megaload (but can be aby other) .
Since this moment we do not need special cable with DTR , we can use any USB->UART TTL bridge , of any brand , even RS232 with MAX232 if anyone still have such old PC (most still have RS232 in PC) .

- Bootloader size 512word (1024kb - half size of original)

So Fusebits should look like that :

Bootloader files we can download from , compilation is more easy than settings of MultiiWiiCopter .
For lazy I add compiled files to this post . Also for other MCU .

About ISP programmer - there are many cheap solutions - I recommend LPT port and 5 wires - can be used ICprog or Bascom (schema of LPT ISP in help file - demo works excellent) .

Well , surprisly I managed that Arduino dudes , for some unknown reasons decided to hide your own compiled .HEX file - why ? that some kind of paranoid . We give you for free nice shiny pen - you can write anything you want but you must buy special ink .
Anyway we still can use that file for our purposes .

At begin in Windows we must set - show hidden files , also is good to unmark to show file extensions . That will be useful in next steps .

Now we can run Arduino IDE . When we want to compile out program we press and hold SHIFT button - then we press compile "play" button , at console on bottom of screen we have full path for out "hidden" compiled .HEX file .

Now we run Megaload bootloader and show him the .HEX flash file .

Now we simply connect power to the board - or on the board we simply press RESET button - update will start automatically . We close Megaload .
Fast and nice .

Here are samples of RC devices based on Arduino , both are working excellent with simple Prolific and other OTi cable , GUI of MultiWii works also excellent .

MultiWii board by FPV4EVER

Ardupilot - for this one I will now back soon and made it fly

Conclusions :
Fuse bits should be fixed .
By the way exchanged bootloader for more "accurate" .
At the end movie showing all procedure :
Arduino and simple TX RX cable without DTR.wmv (4 min 14 sec)


I must admit that having Megaload we can use files compiled by any compiler , like raw AVR-GCC , ICCAVR , Bascom etc.

Also FDTI cable with DTR is still working on it , but DTR is not used .

I hope maybe this info will be useful for anyone .
Last edited by remzibi; Oct 27, 2011 at 06:47 AM.
Sign up now
to remove ads between posts
Jul 13, 2011, 02:31 PM
Registered User

USB-UART Tx Line driver

Hi, my computer doesn't recognise my remzibis usb. It says that the driver for the USB-UART Tx Line are not installed. Does anyone knows where can I get them?.
So far my computer is not conecting to my remzibis osd and I wonder if this is going to be the problem.
Jul 19, 2011, 01:39 PM
Registered User
tincho_arripios's Avatar
Hello sir!
I wanted to get your email to buy a OSD that you manufacture, it will be possible is available to ARGENTINA??

I hope your answer, I would greatly appreciate, since I can not find more data on you and your products ...

good flights, a warm hug to you!

Jul 23, 2011, 05:34 AM
Registered User


Hi Remzibi,

maybe you can help me to get the parts. Especially the PCB!
Please contact me: or PN.

Sep 08, 2011, 09:01 AM
Registered User


Hi Remzibi,

I would like to get your email if possible,for the purpose of buy OSD that you manufacture.
I hope you contact me:

Sep 28, 2011, 05:02 AM
Registered User
remzibi's Avatar
Originally Posted by angelillogr
Hi, my computer doesn't recognise my remzibis usb. It says that the driver for the USB-UART Tx Line are not installed. Does anyone knows where can I get them?.
So far my computer is not conecting to my remzibis osd and I wonder if this is going to be the problem.
All drivers for all types of cables are for download at first post here

To fast contact please write PM to me (simply press envelope symbol below my avatar) .
Oct 04, 2011, 03:34 AM
Registered User


Hello Remzibi!

I was wondering if I could buy the OSD that you manufacture? I live in the US and would love to have one of your OSD. They look awesome!

I would really appreciate it if you would sell me one of these. Please email or call me at:

Thank you!!
Oct 14, 2011, 09:30 AM
Registered User

OSD purchase.

Hello Remzibi,

I am from Czech Republic, where can I easily purchase your OSD?


Oct 19, 2011, 03:25 PM
Registered User

Hook me up!

Hi Remzibi, finding your excellent OSD is nigh-on impossible, I guess a victim of it's own success. How can I go about purchasing one for my Arductoper Quad please? thanks very much, regards Owen
Jul 16, 2012, 09:09 AM
Registered User

Want to buy OSD

Hi Remzibi!

I would like to buy one of your OSD's. Please would you contact me an tell me how to purchase one in Austria.

Please mail me:

Thanks very much, Herbert.
Aug 19, 2012, 03:58 PM
Registered User
Hello Can you sell me an OSD Remzibi?Thank you
Sep 12, 2012, 06:41 AM
Registered User
lakis21's Avatar
Hi Remzibi!

I would like to buy one of your OSD's + GPS + cable etc. Can you send me an email, how much is the total + shipping to Greece, paying with paypal?
I want to use on my Dji f550.
Please mail me:

Thank you!
Sep 18, 2012, 02:08 AM
Registered User
Hi Remzibi!

Can you help me.
When i have changed firmware on my OSD to version 1_74, after detecting GPS
with OSD's Layout on the screen leave message -

GPS detected 38400
units: meter

How to remove this message?
Thank you.
Sep 18, 2012, 06:11 AM
Registered User
To previous message
On version 1.79 everything is Ok
Oct 28, 2012, 03:52 AM
Registered User

Buy one of your OSD's

Hi Remzibi!

I would like to buy one of your OSD's. Please would you contact me an tell me how to purchase one in Francce.

Please mail me:


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question Any flying sites in SF Bay Area, closer to SF? mikel Parkflyers 7 Mar 23, 2014 04:57 PM
Discussion Arduino-based Helicopter UAV butterS_ UAV - Unmanned Aerial Vehicles 21 Jan 17, 2011 05:46 PM
Idea Head traker based in Arduino and WII motion plus (HTWMplus) fbforos FPV Talk 1 Dec 21, 2009 12:43 AM
Discussion Arduino based quadrocopter? kaldak Coaxial Helicopters 3 Jul 02, 2008 12:57 PM