RC India

The rains are here in Bangalore and often play spoilsport when I want to fly my Reptile 500. So I thought of building an indoor flyer. Inspired by Oscar Liang's blog post here (http://blog.oscarliang.net/build-fpv-micro-quadcopter-smallest-quad/), I decided to build myself a micro quad I could fly with my current radio setup. This quadcopter comes with a 32 bit processor that can run CleanFlight. Hopefully, this project will give me some experience with the CleanFlight software.

Parts list:
Integrated frame/flight controller  (http://www.goodluckbuy.com/micro-quadcopter-flight-driver-controller-9dof-9-axis-altitude-sensor-stm32f103.html)
USB to Serial adapter (http://www.banggood.com/CJMCU-CP2102-USB-To-TTLSerial-Module-UART-STC-Downloader-p-970993.html)
 Hubsan 7mm brushed motors (http://www.banggood.com/2-x-7mm-Hollow-Cup-Motor-For-Hubsan-H107L-Upgraded-Version-p-80923.html?p=OY2106728901201408U400)
Hubsan spare props (http://www.banggood.com/Hubsan-H107-X4-RC-Quadcopter-Spare-Parts-Propeller-Blade-Set-p-72513.html?p=OY2106728901201408U4)
FrSky VD5M Receiver (http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=22689&aff=1195429)
 Turnigy nano-tech 350mah 1S 65~130C Lipo Pack  (http://www.hobbyking.com/hobbyking/store/__19116__Turnigy_nano_tech_350mah_1S_65_130C_Lipo_Pack.html)

The frame/flight controller came in today and it is smaller than I ever expected. Photos coming up!

Waiting for the pics. Also please mention from where u got the parts.

Just click on the.links that he has put up..
Nice choice ..go for it

Subscribed   :thumbsup:

Thank you Darshan and Sundaram Sir. Miginstruments, I got the parts mostly from BangGood and the frame from GLB. Parichya will be providing the Rx and LiPo.
Here are the pics of the frame. I am still waiting for the rest of the parts. This seems small but is actually much bigger than the likes of the CX-10 and Eachine H7.
(http://i284.photobucket.com/albums/ll36/siddharth_kumanduri1/IMG_1408_zpsdepmda7r.jpg)
(http://i284.photobucket.com/albums/ll36/siddharth_kumanduri1/IMG_1406_zpstipfen0n.jpg)

That is literally MICRO.. keep.us updated as you receive the parts.. :hatsoff: :salute:
A question. . Are you using gears on the motors as.in syma and other quad!

The good thing about this quad being so small is that I can can practise flying in different orientations as well as flying acro. I do not think gears are necessary for these motors.

I have received the USB to Serial adapter as well as the motor and props. So I got around to the software setup.
The first thing I needed to do was install the drivers for my CP2102 USB to Serial adapter. I got the drivers here (https://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx) and they worked flawlessly.

I then flashed CleanFlight after disconnecting the bootloader jumper on my board. the connections are Tx-Rx, Rx-Tx, Gnd-Gnd and 5V-5V. I got around to the software setup as well. I copied the PID values from the original blog post. I will tune them once I fly (still need an Rx and LiPo). I also set up the profiles 1,2 and 3 in CleanFlight such that I can get Acro Mode, Horizon Mode and Headfree mode respectively. This is with only 4 channel input! I can post my CLI dump if anyone is interested. Here are some pictures.

The flashing screen:
(http://i284.photobucket.com/albums/ll36/siddharth_kumanduri1/Screen%20Shot%202015-05-30%20at%2012.35.12%20pm_zpsehebqidm.png)

The screen once connected:
(http://i284.photobucket.com/albums/ll36/siddharth_kumanduri1/Screen%20Shot%202015-05-30%20at%2012.35.33%20pm_zps6kmyntny.png)

The connections to flash:
(http://i284.photobucket.com/albums/ll36/siddharth_kumanduri1/IMG_1447_zps8umfa9gi.jpg)

Wow. That's really a micro quad. Awesome Build.

Sorry I haven't updated this thread in ages. Thanks to a production error in one batch of boards, my board came with the wrong motor driver transistors. i have ordered some IRLML2502 FETs to replace them with, but I've been waiting for them for almost one and a half months. :(

After I got the FETs, I tried repairing the board. However, I appear to have damaged the board while desoldering the old transistors. I got a replacement board from GLB with a record shipping time of one week by Hong Kong post! The build was quick and easy and this quad is a little rocket! A great acro trainer though the flight time leaves a lot to be desired (2.5 min). Pics and video coming up!

very exciting to know  (:|~  {:)}   please upload some MAST TYPE videos  :thumbsup:

Is the FrSky receiver compatible with HobbyKing 6CH Transmitter?

No. Receivers are usually only compatible with their own brand/ protocol of transmitter. FrSky receivers will only work with FrSky transmitters or modules.

I have a HobbyKing 6ch transmitter. I don't think HK makes any micro receivers like the one mention by Oscar Liang (FrSky VD5M). Kindly help with the same.

I have few of these lying in warehouse. Its very very old, like 2 yrs back i bought it. But never found a mini receiver to try my hands on it.

Anyhow its a good build  :thumbsup: :thumbsup:

Thank you sir. I never got around to posting flying videos and completed pictures and now I've dismantled it completely. I will do a rebuild and post some videos.

Also, are the boards you have the STM32 version that support cleanflight or the ATMega version that run MultiWii? I have seen both of them available.

I think they are ATMega version cos 2 years back ATmega was common, now STM is common.

Woow  {:)}

Thank you for sharing such an awesome thing :D
keep updating this thread with the knowledge you get or the additions you make to it. :bow:

BY the way how much did it cost you :D

Hello SK1701,

I already have all the parts to build this mini quad, including the usb adapter (same as you).
My problem is that I have an error connection when I try to flash it with cleanflight. I tryed with baseflight and the messagge is equal: "No configuration received within 10 seconds, communication failed"

I have the drivers from silabs, my pc detects the usb and says that is installed well.

Until I read your post I had wired it wrong, tx-tx rx-rx. So I supposed that it was the problem  {:)}, but it wasn't.  :banghead:
Boot0 is disconnected and the other connector is in "pow" position.

I will apreciate any idea or advice.

Thanks
Carlos

Hello Carlos.

Have you selected "Full Chip Erase" and "No reboot sequence" in the firmware flasher screen? Also, have you made sure that the CP2102 adapter and the CJMCU have a common ground connection. When you connect the adapter to your computer do the LEDs on the CJMCU board turn on?

Yes, I did everything you describe. I will send a picture when I arrive at home, maybe you see something wrong... Thanks!

Sorry...but...how do you upload photos??! it says maximum attachment size allowed 200 kb!

You either need to reduce the image size a lot or upload them to an external hosting site like Photobucket and embed the link here.

Thanks, so I will try with photobucket. I uploaded 5 photos, in one of them I show with an specific program that my pc recognize the cp2102. I tryed many many times to connect it, I order another usb adapter, the same as Oscar Liang, and another micro quadcopter...Do you see something wrong?

kind regards from Spain

http://s1074.photobucket.com/user/carpalen29/media/device%20connected%201_zps3ajpd0nk.png.html

Your connections look fine and the board is powered on. So this is a very strange problem. Maybe you could try it from a different PC? Which version of Windows are you on now?

I've tryied it with windows xp. I run windows 7 with my job laptop but I can't use it because of I don't have administration permisions to install the drivers.
I will try with another laptop which runs windows 10 or 8 I don't remember. But the drivers are the same, right?

It's very frustrating to be stuck at this point...

I've tryied with my mother's laptop, which runs windows 10. After a while searching on the internet for the cp2102 drivers, I discover that there are no drivers available yet for windows 10...amazing  {:)}

I will try tomorrow with my girlfriend's laptop, it has windows 7!!

Just a tip/trick, whenever you capture a pic from phone, just take its screen shoot :) and you'll be good to go :D. It will be under 150 kb and easily uploadable.
(Self implemented) I do it every time, it works for me :). I hope it does for you as well.

Thank you Sukhpreet! easy and fast... :)

Happy to help broda....don't forget to +1  :P  :giggle: