Hi guys,
this is my first question (probably i'm doing this wrong and I apologize in advance).
I have a drone without lipo battery (3.7v, 500mah, 1 cell), the question is easy:
Can i use arduino instead the battery? Means, can i connect arduino to feed the circuit of the drone?
I attach images of circuit.
Thanks
No.
ok.. it's possible to know why? thanks
I doubt your drone could lift the weight of an Arduino and USB cable.
what do you mean by "Arduino instead Lipo Battery" ? :o
the Arduino is NOT a power supply !
how are you powering the Arduino itself ?!
a very very very very long USB cable ???
sorry I explained myself wrongly.
I'm interested only to power on it, not to fly.
Now, the answer is different?
It might help us all if you read How To Use This Forum -- the top most post in all of the Forums on this site.
Also, you would save us some trouble if you learned how to embed uploaded images by reading this: (Out of Date) Guide: How to Insert Uploaded Images in a Post - #74 by ReverseEMF - Website and Forum - Arduino Forum
But, taking a stab at this, it sounds like you want to use the Arduino Power Supply [specifically the +3.3V output that is available on the UNO -- assuming we're talking about an UNO], to power your "Benched" Drone -- what? For testing purposes? [that's an example of one of the details that would assist us in helping you. 
]
The answer, if I got your scenario correct, depends on how much power that drone needs, and what Arduino "flavor" you yearn to use [notice how I'm impeded by the lack of these details -- another Teachable Moment ].
Sorry i have read the guide a little fast!
Reguard your answer, you got it exactly right.
I have an arduino UNO R3 and i need only to do some test on the drone.
For example the first, look if it turns on.
This is the drone: Infiniti RC drone FX-6
I don't really know how much power needs but it works with a lipo battery 3.7V 500mAh single cell.
At the end, sorry my bad english, but i don't understand what you mean with "flavor".
Raschild:
I don't really know how much power needs but it works with a lipo battery 3.7V 500mAh single cell.
Then clearly you first have to measure how much current the drone is taking when its running from battery.
mm i understand.. But i wanted to use Arduino only because i don't have the battery 
so there isn't another way without using it? (I know it sounds like bullshit)
srnet:
Then clearly you first have to measure how much current the drone is taking when its running from battery.
That might be a "Catch-22" since the OP stated the absence of a battery.
How about this: Since the Arduino's regulator is fairly good at saving it self, when demands are greater than it's capabilities, perhaps just try it, and if the Arduion's regulator doesn't give up, you're good. In the very unlikely case where the Arduino's regulator actually frys, well, perhaps replacing it is not a daunting expense?
Otherwise, perhaps take on the project of making a power supply, as a precedent to your Drone project. Or purchase a 3.3V "Wall Wart". Or, something like this: https://www.ebay.com/itm/AC-DC-Power-Supply-Buck-Converter-Step-Down-Module-3-3V-5V-9V-12V-15V-24V-36V-US/122832954547?hash=item1c996a24b3:m:mNop_RHwBUxr99MJ7MTU6Cg
Just don't kill yourself hooking it up!!!
The Arduino's 3.3V supply is limited to 50 mA.
I don't think any drone could even start moving its props on that little current. You're likely to need a much better power supply. Such a LiPo battery can easily supply a few amps, at least for a short while, and that can very well be the peaks the motors draw to get going (stall current).
Ive got a small drone around the size of the OPs , and it will fly for 4 minutes on a 3.7V 800mah battery, which works out roughly to 12 amps , so 3 amps per motor.
Even a wallwart wont provide that sort of current.
You may be able to just test just the electronics in the drone , as long as you dont enable the ESC, ie dont power the motors.
No. Buy or borrow a battery.
mauried:
You may be able to just test just the electronics in the drone , as long as you dont enable the ESC, ie dont power the motors.
ok thanks! And so how can i do this?
Tell me if i'm wrong: can i disconnect motors from the circuit of the drone and then connect arduino output (3.3V 50mA) to test only the power on?
Probably this will not be enough to turn it on and so I will try another solution, but would I have possible side effects? (ie. burn or broke something)
If not, do I connect the output to the circuit directly? or do I need other components?
Thanks you all, this isn't only for the project itself but also to deepen my general knowledge!
Tell me if i'm wrong: can i disconnect motors from the circuit of the drone and then connect arduino output (3.3V 50mA) to test only the power on?
You're wrong.
AWOL:
You're wrong.
can i ask why? where is the error? (to understand what I'm doing wrong)
Raschild:
...Thanks you all, this isn't only for the project itself but also to deepen my general knowledge!
once again, the Arduino is NOT a power supply - if you are using it just for the 3.3V - and will be getting ONLY 50mA - it seems pointless - what exactly are you testing ?
What is there to test on a drone without motors?
That 3.3V output is meant to power sensors that need this voltage. Most need just a few mA, if that much.
Your drone's control board probably needs just a few mA, too - but without motors you won't get any feedback from it other than that you can see the LEDs go on. No way to see if it actually works, i.e. whether it may be able to fly.
