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Answers and Planning

Questions that needed answers:

What will it do?

The main focus of this drone project is the Transmitter system, so the main thing it will do is communicate with a receiver. (spiral 1)

On the drone side, It will fly using the transceiver set (spiral 2)

The drone will fly autonomously (spiral 3)

The drone will have delivery capabilities (spiral 4)

The drone will be capable of delivering

Who’s done what beforehand?

Many people obviously have made their own drones and custom transmitter-receiver sets but they all use pre-made mcu development boards (arduino nano, uno etc). My transmitter system will be based on the ATMEGA328PU chip. The transmitter will control the servos and the motor on the drone.

example of this from a wonderful youtube channel KendinYap : DIY 6 Channel

People also cut individual pieces of cardboard and put them together for he drone body, but mine will be made foldable using the zund, so less glue and adhesives, less manual work.

example of cutting single pieces before putting them together: DIY Glider

What will you design?

I will design: 1. the entire electronics of the Transmitter (fablab-able transmitter system) - KiCAD 1. the 3D printed case for the Transmitter - Fusion360 1. the fixed wing drone - Fusion 60 1. the 3D -> 2D workflow for making the drone cutable in the zund - Rhino + Grasshopper 1. the 3D printed motor holder and landing gear holder

What materials and components will be used?

  1. Cardboard
  2. NRF24L01 modules
  3. Copper Board
  4. Resistors
  5. Capacitors
  6. LED
  7. Joysticks (2 axis potentiometers)
  8. Slide switch
  9. Voltage regulators
  10. 9V battery
  11. Battery Holder
  12. 4S LIPO 11.1 V
  13. 30 A ESC
  14. 1400kv Motor
  15. 9g Servos
  16. Push pull rods
  17. 3D print PLA
  18. prototyping PCB
  19. Arduino nano every
  20. Copper wires
  21. Jumper wires
  22. servo horns
  23. Propellor

This is just the list, the full, proper BOM (in the “how much will they cost” section)will contain the exact amounts with the prices.

Where will come from?

Almost all items are available in the Super FabLab. The niche items such as the Lipo batteries and the NRF modules are purchased from a vendor in India.

How much will they cost?

Total: $118

Bill of Materials:

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What parts and systems will be made?

The drone body and the Transmitter electronics (microcontroller etc) and body will be made in the lab by me.

The receiver board will be soldered and put together together by me using the items available in the lab.

Rest of the items such as the ESC, motor, LIPO etc will not be made by me but the entire system will be assembled by me.

What processes will be used?

  • Subtractive manufacturing using the Zund.
  • Additive manufacturing using the Prusa 3D printers
  • Electronic PCB design
  • electronic PCB production (milled on Roland SRM20)

What questions need to be answered?

  • The exact range of the transmitter system.
  • The exact weight of the drone

How will it be evaluated?

Being as I am tackling the most complex part of the drone system (as a mechanical engineer), I believe my final project can be considered a success if:

  1. my custom fabbed transmitter can communicate, control and move the servos and motor on the receiver side precisely,
  2. I design and 3D print the case for the transmitter.
  3. I design and laser cut the joystick case top using acrylic

Since the propulsion, aerodynamics and flight of the drone is a whole sub-system of its’ own, and a bit out of this class’s scope, unsuccessful flight will not negatively contribute or affect the successful passing of the course.

Tentative Schedule From now until the END

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