Questions tagged [drone]

All related to aircrafts without a human pilot aboard.

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1answer
37 views

Can't satisfy DJI E300 ESC with my PWM signal [closed]

I'm trying to build a drone with my Raspberry Pi 3. I'm using Windows 10 IoT and C#. I've bought a DJI E300 pack (motor + ESC + Propeller) and in the data sheet it says that the ESC works with ...
0
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0answers
10 views

Charging DJI's batteries with USB PD

I want to charge DJI's batteries from USB TypeC PD charger. The charger can provide 60W output on its USB PD port. I'm planning to use an USB PD module (which gets me the 15V output from this PD port,...
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0answers
76 views

PX4FLOW (Optical Flow sensor) - Powering with 5v. Does it work with OmniNXTF7 I2C SCL/SDA at 3.3v?

I want to use PX4FLOW with OmniNXTF7 flight controller. This flight controller has 3.3v I2C SCL/SDA and no PullUp-resistors. I use the PX4FLOW only with I2C port, with 5v at VCC (not 3.3v). Does ...
1
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0answers
33 views

What causes the fail-safe bit to be set in the SBUS protocol?

What causes the fail-safe bit to be set in the SBUS protocol? I know that the when the link between the transmitter and receiver is lost, the fail-safe bit is set, however, what constitutes a 'lost ...
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2answers
47 views

Closing 1s battery connector

I have a drone that can plug two 1s batteries. I have the option the plug only one battery but I need to "close" the other battery input with the following (image). I have no idea how this is called. ...
0
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1answer
73 views

Using a battery as a voltage source in a DC DC converter to supply a second battery?

I was wondering if I could use a battery as Vin to a DC DC converter to charge another battery. Example: Using a Li Ion battery pack and having it go through the DC to DC converter to charge a LiPo ...
1
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0answers
62 views

Drone camera chip identification help

I tried searching for this chip and looking for a similar manufacturer logo but with no succes. I'm trying to get a datasheet on it. It is from a drone that records 720p 30fps video.
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0answers
71 views

Gyroscope drift in IMU

So, a brief foreword. I'm not sure if this question belongs here or in the DSP community, its closely related to both, but I have a feeling this will be more of interest here nonetheless, so I am ...
0
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1answer
95 views

Signal loss failsafe for a cheap drone using 433 MHz tx/rx pair

I bought a cheap drone to get into flying quadcopters and it seems it has only one big issue at that price, which is a very long failsafe time of 20 seconds, i.e. if the remote signal is lost, the ...
1
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1answer
68 views

Brushless Motors kv rating and testing methods/procedures

I’m very interested in testing Brushless motors and Prop sizes. I have been involved with ASTM ASHTO and other testing methods. What procedures/standards are used for testing brushless motors for ...
0
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1answer
73 views

Drone's Remote control not powering on! [closed]

I am using bayangtoys X16 GPS drone. I managed to solder the "alfa APA-M04 7 dBi gain RP-SMA directional panel antenna Wi-Fi" on the board, and it was working absolutely fine. Until, I put hot glue on ...
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0answers
51 views

Take account of motors and ESC peculiarities to sync their speed

I'm trying to synchronize 4 brushless motors' speeds to, eventually, fly a drone. I chose every electronic component and it's starting to look like something. I control my motors with the pigpio ...
1
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0answers
145 views

Beeper for lost FPV drone

I am not an expert in electronics, just the very basics so please bear with me. I am trying to create beeper alarm for my FPV drone that will activate when it crashes or no movement for certain ...
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0answers
103 views

Please help me to identify this chip (Cheerson CX-10SE)

Can someone help me identifying one of these chips? They are from a nano drone called Cheerson CX-10SE. It is possible to control the older CX-10 with a Multiprotocol Module and a decent Transmitter....
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3answers
5k views

Why isn't the ESP32 used for quadcopter flight control? [closed]

I'm looking for a quadcopter microcontroller to use as a flight controller and am comparing a couple of different ones. Went on this website to see what current boards are using: http://www....
1
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2answers
93 views

Wire gauge on Drones different?

How is it a 12 volt 40 amp wire in a car has to be approximately 16mm thick but a drone can use 3.5mm thick cable for 12 volt 120 amps. What is the difference? They both have the same amount of power?...
-1
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1answer
32 views

How to masure maximum esc capacity

I have a electronic speed controller(esc). I bought it from local store, so i don't know what is the capacity (maximum current capacity) how to find it? Plz guide me.
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1answer
96 views

Li-Ion vs Li-Poly For Quads

Instead of using a $25 Li-Poly battery with a $10 charger, I was going to use one of these- https://hackaday.io/project/46436-3-cell-rc-battery-pack-made-with-18650-batteries What I was wondering Is ...
7
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4answers
2k views

Why do most FPV 5.8 GHz video transmitters use PAL or NTSC?

I am not much into the details of video transmission in general. However, I wonder since most displays and electronics are digital, why have suppliers for FPV equipment chosen an analog transmission ...
0
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2answers
708 views

Broke my first soldering iron after 5 minutes of using it [closed]

I started getting interested in drones recently and I bought a soldering iron last week on Amazon.co.uk After using it for 5 minutes to try pre-tin some copper wires, the solder was unable to retain ...
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2answers
3k views

How to design drone power tether system? (high power with ultra light cable)

There are drones that are powered with power tether from the ground station, and such drones can be airborne 24/7, not only 20 minutes when using batteries. I'm very interested to reverse-engineer ...
1
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1answer
41 views

How much energy do Li-Ions/Li-Pos have below 3.2V threshold?

How much energy does a battery still have when a protection chip disconnects it? I know that such discharging kills the battery, but in some cases it would be useful. For example, in drones: when you ...
0
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1answer
579 views

Drone gyroscope placement

I'm building a drone with an mpu6050. Does the placement of the mpu influence sensor data? I mean, if I rotate the sensor properly so that all axes point in proper directions, then will it matter if ...
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2answers
276 views

RF reciever to detect unknown drone RC links [closed]

I am currently developing anti drone system as a project. Therefore,I am in need to make a RF reciever/Sensor , which can detect RC links(Drone-controller RC link) at multiple frequencies(488 MHz/2....
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1answer
195 views

How can a drone take down a high-tension power line? [closed]

This news article -- in which a drone reportedly took down the power grid in Mountain View CA -- caught my eye: Thursday night power outage the result of a drone crash Despite the compelling photo ...
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2answers
395 views

how can i make drone fly in same location? (not go left, right, forward, back)

I made quad drone that use PID control to fly and drone fly well. I set the PID values, and the drone always have difference force, so drone always go left or right or forward or back. It can't fly in ...
3
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2answers
993 views

Can high voltage power lines EM provide power for drones? [closed]

How is the EM field that surrounds high voltage power converted to produce a current through a wire? How much electricity can be produced without coming in contact with the wire? Could the EM field ...
-5
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1answer
182 views

Atmega328 Controller schematics

I'm a beginner at electronics. I'm doing a quadcopter controller and for it I use two L293D, one Atmega328 and a MX05-V 433MHz receiver. For power supply I use a 5V battery for the MCU and receiver, ...
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2answers
2k views

Wiring battery and solar panel to drone to extend flight time - schematic help

for one of my projects I'm trying to create a solar assisted drone. So far this is my schematic: So with the battery itself connected to the flight control board, the drone runs for about 6 ...
0
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1answer
73 views

Drones power distribution

I'm trying to build my own quadcopter and I plan to design my own flight controller / mother board. Now my question is, how do drones, such as the DJI phantom, reduce a high voltage with high current, ...
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0answers
69 views

Right ground connection between different blocks

Which is the right way of ground connection? Is it necessary to separately connect grounds between different blocks, without touching other grounds? Something like ground PCB trace going through ...
2
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3answers
467 views

Finding true north in UAVs

In my application, I need to find true north direction, for reference purpose. I am having a GPS enabled drone. I have searched over Internet and found that moving in the north direction while keeping ...
0
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1answer
217 views

Can I hook 5v lipo batteries together to run an electric scooter? [closed]

I have this scooter: http://www.monstermotorscooter.com/e-500.html It takes those big batteries all the scooters take. I was looking at these charger packs that have a 5v lipo battery in them: http:...
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2answers
4k views

Can hard drive stepper motor can be used for making drones? [closed]

I have some useful hard drive stepper motor can it be used for making drone??
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1answer
388 views

Equivalent battery

I bought a drone with a battery and i would like to buy a second one. Maybe a better one if possible. I have a charger with wrote : Li-PO: 7.4V And the battery:...
0
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1answer
455 views

Quadcopter balance with MPU-6050

It is not uncommon to see people asking about how to balance a quadricopter using MPU-6050. It's also common to see people answering that a PID controller is needed. However, people doesn't say how. ...
3
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3answers
3k views

Efficiency comparison between six step and FOC for a given motor

For a given PMSM motor with sinusoidal back-EMF, it can be driven by either six-step (as in drone applications) or by FOC (as in servo control). However, for a given motor and given DC link voltage, ...
1
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1answer
197 views

Why is GPS module acting strange?

I am working on a Arduino based quadcopter. The Arduino being used is a Blend Micro. Not shown in the following diagram are 4 infrared sensors, 1 ultrasonic sensor and a 9 axis accelerometer. The ...
0
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1answer
589 views

DC motors not spinning at same RPM?

I'm attempting to make a quadcopter using an Arduino board (Blend Micro). I've wired everything up as such: When I run the following code just to test if everything is working, the motors do not spin ...
0
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1answer
161 views

AR Parrot navigation board pinout

Does anyone know which pins do what on the AR Parrots navigation board?
0
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1answer
76 views

Re-attaching A Cable To A Circuitboard [closed]

I have a drone, but one of the cables connecting the battery to the circuit detached and I took it apart so I could have better acces to the circuit board. I know where the cable goes but my problem ...
1
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0answers
58 views

tracking multiple object locations

I have a requirement in which I want to track 10+ robots in a field (or hanger), the robots are small. My first thought would be to use a drone to act as a collector, monitoring the position of each ...
0
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1answer
259 views

Brushless motor not turning

I'am trying to build a drone. Therefore I bought some brushless DC motors This is the only specs I have for the motors : ...
9
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3answers
2k views

Why do RC applications use such a small PWM duty cycle?

I know that RC applications, such as a drone, use PWM signals to drive the motors. This PWM signal is mostly 50 Hz (0.02 s). The pulse itself varies from 1 ms to 2 ms. So a 1 ...
1
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1answer
688 views

Electronic hit detection

I'm building various r/c vehicles like warplanes, tanks, auto-turrets, etc. and I want to fit some of them with some kind of a weapon. I've decided an air soft gun is a good choice. So, mounting and ...
1
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1answer
85 views

How to determine FET switch specifications

I am working on a DIY drone, and I (preferably) need to be able to disconnect my ESCs from the battery via the transmitter (a Raspberry Pi). After looking for solutions for a while, I concluded FET ...
3
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1answer
760 views

Protect drone from lightning

I am designing a dirigible, robotic drone. It is basically a polyurethane airship, approx 3.6 m length and 2.1 m diameter. I am worried about lightnings: as far as I know, a Faraday Cage should be ...
2
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2answers
890 views

GPS and Barometer assisted flight on a mountain

This question is regarding a drone and its GPS/Barometer sensor and may not fit well in this community and if that's the case, please advise if I should move it elsewhere. So. I have built a DJI F550 ...
3
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2answers
726 views

Quad copter - from PID values to motor power

I am struggling with a completely self built/written quad copter I am working on. I am working on the PID controller for balance, right now just with a P value and it only reacts on ROLL and PITCH ...
2
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1answer
402 views

Using a low discharge accumulator to power a drone

I'm trying to figure out if there is a way to use a Lithium accumulator to power a drone. Because of the maximum recommended continuous current of the battery, which is too low, I can't drive my ...