Showing posts with label Gadget and DIY Techniques. Show all posts
Showing posts with label Gadget and DIY Techniques. Show all posts

30 December 2013

FPV Micro 5.8 GHz Video Transmitter

Building a Micro FPV pod.
Part list: 

09 December 2013

MINI MWC Flight Control Board and DSM2 - Upload MultiWii into the Board

Some instructions for flashing/uploading/writing the MultiWii program/sketch to a Mini (MultiWii Control) MWC Flight Control Board to a computer. Here is the link to where I bought everything for this work.

This instruction should work with other Wii Motion Plus and a Arduino pro mini board.

First you need to download the following applications into your computer. You need to connect your board to your computer. Here are another posts for how to connect the board to a computer and how to calibrate ESC with MultiWii program.
  1. You need to download the MultiWii program. Here is the link to download. The MultiWii program is in the MultiWii unzipped file. The other MultiWiiConf file has the GUI application for you to adjust and confirm your board settings and configurations.
  2. Arduino application, that is used for setting up and editing the MultiWii program/sketch, will be used for flashing/uploading the program into the board. Here is the link to download. Choose the Arduino IDE and select the one fits your computer to download.
  3. Here are a few editing that I did to the sketch in the congf.h tap. I have a Quadcopter X type, I use this as an example for everyone.
    • Uncomment --- #define QUADX
    • Uncomment --- #define HK_MultiWii_SE_V2 ..... this is for HK Mini MWC board.
    • Uncomment --- #define SERIAL_SUM_PPM .... please select the one match your TX brand.
  4. Next, you need to select the Board Type and Serial Port under Tools.
  5. Last is to save, compile and then upload.
Below are the things to watch out:

08 December 2013

MultiWii ESC Calibration

This video will show you how to use MultiWii program feature """#define ESC_CALIB_CANNOT_FLY """ to calibrate all the ESC at once.

Things to watch out:
  • No need to switch on your TX.
  • Disconnect the board from computer
  • No props attached
  • Once the calibration is completed, comment the #define ESC_CALIB_CANNOT_FLY and re-upload the MultiWii program to the board.
See also how to connect the board to a computer.
and Upload and Configure MultiWii program.

07 December 2013

Defect problem --- Hobby King Mini MWC Flight Control Board and DSM2

Incomplete soldering causes the board not able to communicate with ESC's. This causes me to spend so much time on troubleshoot ESC calibrations. I thought that the MultiWii program setup and parameter settings were the issues. It ended up the board defect.

The entire 3rd row of the ESC pins (signal pin) didn't solder to the board. See the arrow shown on the picture below.

Defect problem --- Mini MWC Flight Control Board and DSM2
Red arrow pointing the row of signal pins have not solder to the board.

Defect problem --- Mini MWC Flight Control Board and DSM2

Defect problem --- Mini MWC Flight Control Board and DSM2

More pictures below

20 November 2013

MINI MWC Flight Control Board and DSM2 - Connecting to Computer

Some instructions for connecting Mini (MultiWii Control) MWC Flight Control Board to a computer.

The device at the top of picture below is the board . Bought it from HobbyKing. Here is the link.
You might so able to find it here for cheaper price with same quality.

The one at the bottom of the picture is FTDI which is used for connecting the Control Board to computer. As you can see it has an USB on the left.

The FTDI is used for connecting the board to your computer so that you can configure and trim the board controls settings via GUI software, and flash other multicopter firmware into the board via Arduino software.

See how to calibrate the ESCs
and how to upload and configure MultiWii program

Here is a mini micro 4 pin 1.25 T-1 JST connector cable for connecting between the Control Board and the FTDI.

If you look closer in the picture below, you can see pin to pin connections. I have green as ground, yellow as 5V or power (PWR), black as RXD (board side) or TXO (FTDI side), and red as TXD (board side) or RXI (FTDI side).

27 December 2012

Scratch Built Plane - SubsonicDrone v1

Part 1 video - Just finished the preliminary design of my first RC plane which has the basic elements of Skywalker and Micro Drone v3. I am using SketchUp to model the this plane.

Part 2 video - Added parts and electronics that include:

Subscribe my SubsonicHobby YouTube channel for the latest development. As always, your ideas and comments are welcomed.

Part 1

Part 2

15 December 2012

DIY Clover Leaf Antenna

This post has a few quick snap shots of how I DIY Cloverleaf Antenna. Keep in mind that I am not here to reinvent the cloverleaf which created by IBCrazy. Please go here for the most accurate build instruction. This is just my very own build blog of this antenna.

Cloverleaf Antenna
  1. Cut 3 wires (I use AWG 14 or 2.082 mm^2 electrical wire, but the inventor of the cloverleaf antenna recommends 22 or 23 gauge) to same length that matches your video transmitter frequency. Mine is 5.8 GHz = 2.08” or 53mm.

Here is the overall wire length calculation:
In inches = 12088/frequency in MHz
Or in mm = 307022/frequency in MHz
    Cloverleaf wire

    01 December 2012

    FPV success

    Finally I finish the FPV setup on EZ Hawk. Also maiden the plane with the setup. Success!!!

    FPV video

    FPV Setup

    Modified the G-OSD II to CL-OSD.

    22 November 2012

    Scratch Built - Micro Drone V3

    Here is the finished Micro Drone V3.

    Maiden with 2.5 inches CG from leading edge. Using 2213N 800kv motor and 3S 1000mAa LiPo. The motor does not have enough speed but enough torque. I am considering to change the motor to 1450kv motor to speed the plane up.

    Here are the part list:

    Micro Drone V3
    4 inches KFm2 chord. You can find more knowledge about KFm wing profile here.

    29 September 2012

    FPV New cl-osd display layout

    First, I'd like to give credit to cl-osd for this display creation. The new modified OSD layout shown below is based on my own preferences
    This is NTSC, imperial units, voltage 1, 2, and google coordinates always on configuration. This is a HobbyKing G-OSD II. I am using 900MHZ 200mW Tx/Rx & 1/3-inch CCD Camera NTSC.

    Here are the eep and hex files that I share with you, and this is the entire File.


    23 September 2012

    DIY Home made FPV console setup - EZ Hawk Sky

    Here is the final look of the setup and video:

    EZ Hawk FPV Setup


    1: Use Polystyrene Sheet or thin plastic plate and cut to fit the fuselage. This will be your FPV console base. Tape the Velcro on both sides. See pictures below.

    03 September 2012

    DIY Inverted Vee Antenna for FPV - 900MHz

    This is my DIY inverted V antenna building experiences. Hope you find this useful. You may also find this from Aliexpress for a cheap price.

    Here is the final product......

    Inverted Vee Antenna
    Inverted Vee Antenna

    Materials needed----

    • 12 AWG solid wire. It can be purchased from any local hardware store. It is a solid electrical wire. I bought 5 feet of it and it cost me US$1.50
    • A few tie wraps as needed. See pictures below.

    23 August 2012

    G-OSD flashed - converted to CL-OSD

    Here are a few steps with pictures that show how to change the Hobby King G-OSD II firmware to CL-OSD. Here is where I get it. I know there is a blog talks about it, but it has 100+ pages to read. I thought I would just simplify some steps here. At the end you can see a video that shown how the G-OSD react and how the screen looks like during the uploading process.

    Here are the other links to the Success and My New Display Design.

    Step 1: Go to and download the cl-osd.hex and cl-osd.eep files. Here is the screen shot of the website.

     Step 2: To download the files, click on the View raw file at the lower right hand.

    Step 3: You should see the code like below. Then copy the codes and paste them in Notepad and a folder.

    01 October 2011

    Building Tricopter with HobbyKing Quadcopter Board --- Installing AVR Programmer Driver

    I am building a Tricopter and using HobbyKing Quadcopter Board by flashing the firmware with a Tricopter software.

    This blog shows how to install Sparkfun Pocket AVR Programmer Driver for Window XP.

    24 September 2011

    Building Tricopter with HobbyKing Quadcopter Board --- Unbox Pocket AVR Programmer

    I am building a Tricopter and using HobbyKing Quadcopter Board by flashing the firmware with a Tricopter software.

    This blog shows the unboxing the Pocket AVR Programmer which was purchased from The programmer came with a 10-pin to 6-pin connector cable which will be used for connecting the board to the programmer.