Hey! I am looking at purchasing a jDrones Quad or maybe Hexa. I have 3 BIG questions. I am completely new so help and advice would be amazing! 


1st. If I buy the CMOS Video Camera from the DIY Drones Store, how do I record video? Where does it plugin? Is there more external hardware required? How would one set up 900mhz live video? 


2. What is the payload difference between the four models? Does anyone know? *Four models being: 1.Quad 2.Quad with motor upgrades, 30 amp ESC's, and 12x45 props 3. Hexa 4. Hexa with same upgrades as 2...*


3. If I have Telemetry set up, can I program the drone to go outside of RC reciever mode? I saw somewhere that APM gets its power from the RC receiver? is that true? If I send it via Telemetry outside range, will the autopilot shut down? 


Thanks so much guys! I am so excited to build a drone!!!!


Views: 1136

Reply to This

Replies to This Discussion

Also which is better? 3DR Robotics kits, or jDrones kits? (Thoughts?)


1. If the CMOS camera has no internal memory to record to, you need a video transmitter for the plane and receiver on the ground. You then plug the receiver to any recorder/device you want.

2. Don't know about this. I only have the quad and haven't even flown it yet :)

3. You can do everything that you would be able to do if you had the APM connected with USB (except upgrade firmware, I think). APM get's its power from ESC and receiver gets its power from APM.

The CMOS Video Camera is the camera alone.  You'll will need to attach it to a video transmitter to send video down to the ground, and then record it on some recording device via the NTSC video output.  This type of camera is usually used for FPV (First Person Video) flying.  The resolution is very low. (640x480) If you want to capture high quality images and video, it's recommended to just mount a camera on board with no video downlink.  You could mount a lightweight consumer type camera on board, if you get a frame and motor combination that can handle the weight, which brings us to your other questions.


1- Quad.  Just for flying around with with almost no payload capabilities.

2- Quad with upgraded motors.  With motors running 12x45 props, you could probably bring up a small consumer point and shoot camera with no problem.

3- Hexa - Has 6 arms/motors/props, will carry even more weight if you get the right motors.

4- Hexa with motor upgrade - Bigger motors, more payload.

5- The quad is not powered by the receiver, it should be the other way around.  The low voltage (5v) comes from the BEC (Battery Equivalency Circuit) on one of the ESC(motor contorller)  The quad can definitely fly out of radio range without a problem.  The difficulty is how do you get it back.  If you programmed the waypoints properly, then your last waypoint will be your home location.  There's also failsafe, where you can set it to return home after loosing radio signal.


Hope this is a good start for you.

About camera setup and downlink: With a GoPro camera, you can have high quality HD recording to the internal memory and low quality SD output at the same time. This is the way I'm planning to do video.

Also, quad "just for flying around" - you sure about that? GoPro for example weights under 100g and quad should be able to lift that easily. Even the battery can have a 100-200g differences in them depending on what you get. Correct me if I'm wrong :)


Woah! To the 16 gig internal memory of the Copter? Or does the camera have its own memory? Where does one find a GoPro? 



@Ellison Chan

Thanks so much! 

Do you know a good transmitter? What sort of reciever works for the transmitter? 

Do you know a good recording tool? 


For the hexa, what are the right motors? 


No not to the copter memory :) Here's the GoPro: http://gopro.com

They *just* released a new model (there's only two models, they just come in different packages that have different set of mounts with them).

Hey Foxilla, What mounts are there for gopros?


You can find that information and much more from their website, so I rather not rewrite it here.

Here's a direct link to one edition: http://gopro.com/cameras/hd-hero2-outdoor-edition

For UAV use, you might not need any of them though, but they're still nice to have for other things.

For UAVs you should find a compatible mount from jDrones once they start to sell them. Or just figure out how to mount it yourself. I still haven't gotten a mount myself, so can't really tell you any better.

You'd be surprised how adding 100-200g to a quad can affect it's lifting capabilities.  

A regular quad with 10x4 or so props will develop about 500-600g of realistic thrust at each motor.  That'll give you a total of 2-2.4 kg.  All up weight with a 3000mah battery and motors will be about 1.2kg.  That will give you about 0.8kg for payload you would think, but don't forget that the software will limit your throttle so you will never get full throttle, since it needs to reserve some for manuvering.  Realistically you will only get 75% of the throttle for lifting the quad and the payload.  That means you will get 1.4kg of payload and lifting power.  So you see that having a 100g gopro won't give you much extra overhead not to mention that the motors and ESC will overhead from stress if run for long periods.

I would recommend a motor that can swing at least 11" props and 30A ESC if your going to do any camera work.  Also you would probably want more than 5-10 minutes of flying, so you'd use a 5000mah or higher battery which means battery weight will be about another 500g.


Of course, like I said, if you go with more motors like a hex or octo, you can get away with lower torque motors.



Reply to Discussion


© 2020   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service