EEVblog Electronics Community Forum

Electronics => Beginners => Topic started by: ammjy on October 14, 2018, 02:59:55 pm

Title: I'm looking for quadcopter for study.
Post by: ammjy on October 14, 2018, 02:59:55 pm

Hello !

Always, Thanks you forum peoples !

now, i'm looking for quadcopter that all spec and design opened. (Propeller's spec, motor model, airframe things..)

Can you recommend a model to me ?

i want do analysis and modeling myself with known values.

Please, let me know.
Title: Re: I'm looking for quadcopter for study.
Post by: Audioguru on October 14, 2018, 11:42:37 pm
A quadcopter is a toy. The manufacturer will not publish spec's for any of its parts.
Quadcopters, helicopters, model airplanes, model cars and model boats sold by Horizon Hobby have detailed manuals online listing their parts and their part numbers for the parts.
Title: Re: I'm looking for quadcopter for study.
Post by: StillTrying on October 15, 2018, 12:27:37 am
www.theverge.com/2018/2/5/16974310/ehang-passenger-carrying-drone-first-test-flight (http://www.theverge.com/2018/2/5/16974310/ehang-passenger-carrying-drone-first-test-flight)
Title: Re: I'm looking for quadcopter for study.
Post by: AlcidePiR2 on October 16, 2018, 08:19:20 am
Having a full open source/open hardware quadcopter is not  easy.

Indeed the quad is composed of many parts, and  some of them may not be open hardware ( like the ESC).

It also very much depends the range of quadcopters you are looking for. 
A possible solution is the well described model publish in the DIYODE magazine ( you have access to everything online for free)
https://diyodemag.com/projects/part_one_take_flight_with_h4wk (https://diyodemag.com/projects/part_one_take_flight_with_h4wk)

By the way, DIYODE is a very nice new magazine on electronics, with very pertinent projects and tutorials.

This model which is of  relatively large size has a lot  of possibilities, but will not come cheap. Consider 800$ or more
depending on the options.

Open hardware/Open software :

You can use open software for  all components :
- Open TX  for the radio transmitter. Be careful to choose one that support it. Taranis X9D is an example that is provided with it.
http://open-txu.org/ (http://open-txu.org/)

For the main  controller board, there are several options of open source software.
Adupilot, pixhawk  PX4 and several others.

It does not mean that the board will be always open hardware.

There is plenty of information available on the web : as examples
https://www.dronecode.org/ (https://www.dronecode.org/)
http://ardupilot.org/ (http://ardupilot.org/)
http://px4.io/ (http://px4.io/)

And the very good youtube channel
Painless360 https://www.youtube.com/channel/UCp1vASX-fg959vRc1xowqpw (https://www.youtube.com/channel/UCp1vASX-fg959vRc1xowqpw)

I have not much time to do more, but hope this will be useful as a start.


Title: Re: I'm looking for quadcopter for study.
Post by: CJay on October 16, 2018, 08:54:41 am
Joop Brokking has documented his QuadCopter projects.
Title: Re: I'm looking for quadcopter for study.
Post by: Deku Tree on October 16, 2018, 02:41:42 pm
Joop Brokking has documented his QuadCopter projects.

If you're looking to build stuff from scratch and really learn how they work, the YMFC-3D series from him is great!
Title: Re: I'm looking for quadcopter for study.
Post by: IDEngineer on October 16, 2018, 03:42:32 pm
There are semi-standardized ESC and flight controller schematics around. Since competitive drone pilots (my son is one) like to use popular firmware such as BL-Heli and Betaflight, you can't monkey too much with the basic schematic. Beyond picking the basic MCU family (STM32's are the most popular), most of the various vendors differentiate themselves with their choices of FET's, caps, solder pad layouts, voltage regulation, etc.

The professional pilots all build their own aircraft. They tune for whatever is their preferred performance, which is affected by dozens of parameters. Some are in firmware, others are physical (such as motor windings, frame dimensions, even battery placement). My son can feel the difference in very slight frame dimensions even when all other components are identical, in fact for each racing season he builds one-offs of many configurations as he narrows down the array of components he will use. Then he builds a fleet of identical aircraft to fly for that season. For example, one of the issues he's toying with is whether to top-mount or bottom-mount the battery. There are excellent arguments for both configurations and religious adherents to both approaches too. My son ignores the chaff and noise and just does his own testing, because every pilot feels and prefers different things. This is more an art than science.

Almost every day UPS, FedEx, and USPS deliver components to our house from a surprisingly wide array of vendors. Yesterday he received a couple cubic foot box of props that the vendor just wants him to test. I've lost count of the different motors he's evaluating, many have custom windings that he's dialing in with motor vendors to figure out what they're going to offer in the next 6-12 months.

My point here is that we can't really "recommend a model to me". All the commercially available quads are proprietary, and all the privately built ones are extremely specific to that pilot. Your best bet is to spend a LOT of time online and on YouTube, reading and learning how to build them yourself, and then characterize one that YOU have built from components YOU have selected. That's pretty much the only way you'll have collective access to all the data you're seeking.

Good luck! It's a very fun profession/hobby but be prepared for the time commitment.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 07:54:11 pm

Thanks you very much, Audioguru !

you teached me good information.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 07:58:34 pm

Thanks you very much, StillTrying !

impressive news. i thought only small drones.
Title: Re: I'm looking for quadcopter for study.
Post by: blueskull on October 16, 2018, 07:59:25 pm
If you are into the controller design, here you go: https://github.com/DCoJA/yatagarasu-red.

Made by forum member fanofeediy.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 08:02:43 pm
Thanks you so much, AlcidePiR2.

Really, Thanks you for detail informations and documents, Mr. AlcidePiR2 !

i already added that sites in my favorite list in browser.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 08:05:51 pm

Thanks you very much, Cjay.

i visited that link from your reply. quite nice site.
really nice. all components list and detail clearly written.
this site really will help me.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 08:08:08 pm
Thanks you very much, Deku Tree !

yes, quite nice )) i watched his youtube video from your reply. and also his video have detail !
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 08:17:50 pm
Thanks you so much, detail reply, IDEngineer !

your reply make a lot of sense to me. Thanks you so much again, IDEngineer.
and your son is very nice boy ! that is can't possible without talent of Math and Electronics, also Dynamics.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 16, 2018, 08:21:54 pm

Ow, Thanks you very much Blueskull !

it's really nice info. i added already ))
Title: Re: I'm looking for quadcopter for study.
Post by: TK on October 17, 2018, 12:40:12 am
Crazyflie 2.0 by bitcraze
Title: Re: I'm looking for quadcopter for study.
Post by: Mechatrommer on October 17, 2018, 01:40:42 am
even with that if thats still not enough, if you need thing such as propeller specification...
http://teacher.buet.ac.bd/mmkarim/propellerlecture.pdf/ (http://teacher.buet.ac.bd/mmkarim/propellerlecture.pdf/)
https://www.rc-airplane-world.com/propeller-size.html (https://www.rc-airplane-world.com/propeller-size.html)
Title: Re: I'm looking for quadcopter for study.
Post by: StillTrying on October 17, 2018, 09:36:24 am
FPV groups often have quite technical threads.

quadcopterforum.com (http://quadcopterforum.com)
fpvlab.com/forums (http://fpvlab.com/forums)
www.fpvhub.com (http://www.fpvhub.com)
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 18, 2018, 01:44:47 pm
Thanks you for your help !


Crazyflie 2.0 by bitcraze also one of nice quard copter ))
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 18, 2018, 01:50:22 pm


Thanks you for your help, Mechatrommer !

it is quite nice informations ! i'm now reading this.
Title: Re: I'm looking for quadcopter for study.
Post by: ammjy on October 18, 2018, 01:51:35 pm

StillTrying, again Thanks you for your help !!

you teached me nice sources ! it will help me ! ))