My first Drone
Arduino nano + L293D + hc-06
Objective: learn how to use Bluetooth with Arduino.
V 0.1 (no direction, commands by serial terminal).

A little more detail

@dfox I see you fixed the bug with img, thank you, no more crashes till now

V 0.2
12v wasn't enought
Custom made 16v bat now

Bah. The motor is dead.
Need to build a new car.
Has rotation.... lots of rotation but no tork.

Aren't drones the one that fly 😅
Looks more like a rover.
But cool stuff !

That's cool as fuck. What motor drivers do you use? And how does a motor die, did the brushes wear out? 😅

@GyroGearloose are you sure it's the motor? Have you checked the battery and the power delivery? Breadboards don't make for good power delivery circuits, try measuring the current/voltage actually going through the motor

@ceee Nope, Air drones, Land drones, and Water drones, any remote vehicle...
Land rovers if remote-controlled are considered drones.

@N0-Flux-Given The chassis is like 30 years old, and I used the car until it completely died... It was a wonderful NIKO. The motor didn't die but has no torque. Spinks like crazy in the air but can barely pull its weight on the floor. I used L293D since they are so cheap (600ma from each pin), they are H bridges and I can reverse the direction by Arduino code.
ULN2003A are also good and very cheap, with 500ma from each exit with 7 exits, but only passes positive current, meaning no motor reverse.

@endor the motors work fine in the air, I first tried with 12V and they spin like crazy, then 15V and the chassis trambles with the spin. But the motor has no torque, meaning has no strength.
I have an RC Arduino kit (4 weels) the most expensive one that some Chinese seller sent me by mistake instead of some 1€ or 2€ piece. But it's no fun to just use a kit...

@GyroGearloose oh. I was unaware. Something new for me

@GyroGearloose Don't the L29Ds overheat like crazy? And they have a considerable voltage drop too, right. I have one myself and it gets so hot that it'll burn my finger if I touch it for like a second, on 12V.

@GyroGearloose hmmm, generally speaking RPM goes with voltage (the kV number is rpm/Volt), while torque goes with current (Amperes).
Sounds to me like you have too much resistance somewhere in the power delivery lines (maybe some weak connection?), or your battery just can't feed enough current to your motor.
Keep in mind that the nominal voltage of a battery does not stay constant under load: the greater the load, the greater the voltage drop (depends on the C rating too), which in turn means less current too

@N0-Flux-Given IF it overheats like that it's because your drawing to much corrent...
2 minutes working (with weels on the air so they would spin) and barelly got hot.
Now, they really get how are for stepper motors... and for those there are modules, like the Easy Driver and others more suited.
I like the L293D and the ULD2003A a lot because of the price.
And you can/should also buy aluminum heat sinkers since integrated circuits tend to run hot.
You can also place circuits on top of circuits. Now I don't know if the second circuit doubles the Voltage or the Amps (would actually appreciate an answer for this).

@endor Well, I'm using AA batteries ... Might be better to change to lipos... Still don't have a box for lipos yet (on their way) but have protection circuits (which I don't know yet how to use)
You're describing exactly what I see, the wheels spin A LOTTT the higher the voltage but didn't gain much torque...

@endor Still, the original car rolled well with 9V AA ni-cd battery... Might be losing power by using a breadboard...

Found it:
<quote>
So the whole idea is to solder another L293D chip directly on top of the current one. Pin for pin of course This puts the two chips in parallel so the voltage will remain the same but the amperage doubles. These chips are rated at about 600ma continuous or up to 1.2A for a short period. Now they will handle 1.2A continuous and 2.4A for short periods.
</quote>
https://instructables.com/id/...

Power source?

@jvillavi
What do you mean?

I just found out why the drone isn't working properly, found it while building the second droid.
Power bank doesn't give good power to the Arduino nano, If I connect it to the house power it works great. Fuck this fucker.

Hey guys
You can see my second drone and it's story here:

https://devrant.com/rants/1803939/...