Radio-controlled drones are extremely popular and you can them in all shapes and sizes.
And today, we'll show you that 3D printers and drones are a perfect match.
3D printed drones are light, agile, fast, customizable and above all: easy to fix
The props and electronic components are well covered, so when you crash, you will usually
need only some extra 3D printed parts.
And you can easily print plenty of them!
Also, drones in stores seem to be cheap, but important equipment is often missing - like
the RC transmitter, so the price is usually much higher than what you see at first.
So let's print and build a small 90mm drone that fits in your palm, but it's powered by
a 2-cell lipo battery, so it has a nice kick and can be unbelievably fast.
Equipped with FPV camera and Racerstar 1103 motors, this little beast is suitable for
both indoor and outdoor flying.
Plus, with all important accessories included, we'll squeeze the costs just under 160 USD.
We've selected a reasonably priced setup, however there are tons of different brands
and parts, so feel free to pick a different configuration, but keep in mind the weight
and dimensions.
FPV is optional and you can buy it later, if you want.
Let's start with the frame.
It's our own design and we printed it on the Original Prusa i3 MK3 with PLA Prusament.
It takes less than three hours to print everything and the assembly is super quick.
Take four short pieces of filament and insert them into four holes in the lower body
The ESC board has three soldering pads for each of the motors.
You can solder the wires in any order you want, because we can invert the motor rotation
with a software tool.
Then solder the JST connector for the battery.
Place the ESC onto the printed frame, the arrow points towards the front of the drone
Wrap the motor wires around each of the arms and secure the motor with four screws
Before you connect the flight controller to the ESCs, add four small spacers.
Keep in mind that the header has to meet the pins.
Also, double-check the directional arrow.
It's time to add the camera.
Our camera has four wires - 5V input, ground, video in and video out.
Check the instructions for your camera to learn which cable is which and solder them
onto the flight board
Now let's move onto the RC receiver.
Take a 3-wire cable and solder it to the receiver pins according to the manual.
Locate the RC input pads on the Flight board and solder red, black and yellow wires from
the RC receiver
Use a zip tie to fix the receiver in place
To bind the drone, press and hold the binding button on the receiver and connect the battery
Then enter the binding mode on your RC transmitter
When the light turns solid, it means the binding was successful
Now we can finish the frame.
First, attach the camera holder to the top body with a zip tie
Carefully push the camera through the central hole and insert it into the camera holder
Take two zip ties and push them through the lower and upper body, but don't tighten them
completely yet.
First, add the battery holder, make sure everything sits in the right place and then tighten the
zip ties.
If you want, you can secure the battery with a sticky velcro or you can use a different
method of your choice
The last part is about configuring the software.
Connect the drone to your PC with a microUSB cable, then download Betaflight tool from
Github and run it.
First, place the drone on a leveled surface and calibrate the accelerometer
Then, go to configuration and change the ESC protocol - in our case, it's DSHOT600
Next, set the Receiver mode to serial and the provider to SBUS or IBUS
We need to enable the receiver port, it's usually UART1
After saving the values, the transmitter should now communicate
We will use the 3-position AUX1 switch to set up arming and flight mode switching.
However, you can set arming to one switch and flight mode switching to another one,
the choice is yours.
We have to make sure the motors rotate in the right direction.
Two clockwise and two counter-clockwise
If any of the motors spin the wrong way, download BLHeli config app.
Open the app, connect the drone and change the direction of the selected motor
Don't forget to save the values. Then run the motor config again.
Finally, attach the props.
There are two different kinds - clockwise and counter-clockwise propellers.
Install them in the correct order and you're all set up!
Happy flying!
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