วันพฤหัสบดีที่ 25 มกราคม พ.ศ. 2561

DIY Solar Garden light

         
        Instruction "DIY Solar Garden light" will explain how to make low-cost DIY solar garden light by using household waste and cheap electronic parts,simple soldering method and general basic tools.              
        Difficulty : easy
        Cost : less than 5 USD. 

Materials 
1. 1 - LED 5-10 mm.

2. 1 - QX5252F

3. Electrical wires.









4. 1 - Battery Nicad AA 1.2V. 900 mAh.

5. 1 - DIY solar panel 6V.1w.


6. Inductor 100-330 microHenry 1/2w


7. Waste glass jar(out-door usable)




Tools

1. Soldering gun

2. Soldering wire

3. Soldering paste

4. Electrical drill

5. Plier

6. Hot glue gun

Making process
1. Soldering QX5252F with LED,Inductor,and battery according to circuit diagram.



2.Drill a small hole on cover for wiring with solar panel.

3.Connecting solar panel and QX5252F as illustration.

4.Testing and finishing.






วันพุธที่ 24 มกราคม พ.ศ. 2561

How to build DIY Arduino Transmitter OpenTx firmware

        Instruction "How to build  DIY Arduino Transmitter OpenTx firmware" will describe how to build 2.4G 8-channel DIY transmitter using MEGA2560 Arduino controller installing OpenTx firmware which similar to commercial transmitter in the market.       
       The Arduino MEGA2560 will produce traditional PPM signal to send to RF module that can  communicate to general transmitter modules like Frsky,Flysky,Orange,..etc.
        Difficulty : Hard
Materials
1. 1 - Arduino controller - MEGA2560 Core











2. 1 - 128x64 LCD display  12864ZW with ST7920 controller









3. 1 - Old RC transmitter body












4. Joy stick gimbals.(mode1,mode2)

5. Push buttons








6. Capacitors - See detail in BOM
7. Diode 1N4007












8. 1 - 7805 IC Regulator 5V.

9. Female pin header












10. Double rows female pin header








11.Single row male pin header











12.Single row long male pin header












13. Double rows male pin header
14. 1 - LED 5 mm.









15. Resistors













16. Ribbon wires.












17. Male JST Battery Pigtail






18. Heat shrink tube 1.5 - 10 mm.







19. Velcro tape










20. 1 - PCB.DIY. circuit board











22. Electrical 26 AWG wires

23. 1 - Piezo speaker












2. Soldering wire

3. Soldering paste


5. Plier



8. Two sides glue tape



DIY PCB building

1.Installing electronic parts on DIY PCB according to electrical circuit diagram.(see in Github)
2.Install switches,joy stick gimbals,push buttons on transmitter body.
3.Wiring and connecting PCB - MEGA2560 - Gimbals - Switches - Push buttons according to circuit diagram.

Firmware installation (can do before hardware installation)
1.Downloading software OpenTx companion2.2.x from OpenTx website.

2.Installing OpenTx companion on PC.

3.Running OpenTx companion,downloading firmware by using OpenTx companion.
   3.1 Edit setting menu 
      - Radio type : DIY MEGA2560 radio
   3.2 Build option 
      - ST7920
      - frsky
      - sdcard
      - more option as you want

    3.3 Default Stick Mode(Futaba)
      - Mode3 (AIL ELE THR RUD) 
    3.4 Default Channel Order (Futaba)
      - A E T R
4.Flashing Arduino MEGA2560 by using usbtiny.
    See detail of flasing procedure in Github.


5.Testing hardware post-installation.