User Info

 
 
Welcome, Guest. Please login or register.
Did you miss your activation email?

MultiRotorUK ShoutBox

Refresh History
  • hoverfly: you been watching... :embarrassed
    December 15, 2017, 14:16:18
  • VaNDAL_UK: grab ya TX and pretend to be flying it
    December 15, 2017, 11:22:49
  • hoverfly: Sitting looking out the window watching  a Redkite  being mobbed by a couple of crows.   3d handbrake corners , and a  visible contempt for gravity  .So not a bad morning so far.. :smiley: :smiley:
    December 15, 2017, 10:29:36
  • Icefever: At last the TX is talking to the FC...now I can get on with sorting out the next part
    December 14, 2017, 15:40:20
  • Icefever: Bad R...I have matey here..[link].
    December 12, 2017, 15:30:28
  • Bad Raven: IF/A7, a summary thread would enable more people to look and comment, its too big here!
    December 12, 2017, 07:05:40
  • Icefever: I've set the failsafe in the TX setting that's all..there's no connection between the TX and quad. at all..
    December 12, 2017, 03:40:10
  • Icefever: Andy..I've only messed with the failsafe one...but not in Beta.
    December 12, 2017, 03:38:04
  • Andy7: Ice: Is it just that it's not arming? Have you set the switch settings in betaflight?
    December 11, 2017, 21:24:23
  • Two-Six: Fixed it yet Ice?
    December 11, 2017, 15:04:23
  • hoverfly: ffs.. :rofl: :rofl:
    December 11, 2017, 14:51:15
  • Bad Raven: No, a nun falling down stairs...............
    December 11, 2017, 14:01:01
  • DarkButterfly: :laugh:
    December 11, 2017, 12:27:30
  • hoverfly: you are probably on a zebra crossing. ::)
    December 11, 2017, 09:49:42
  • Bad Raven: Everything went white, black, white, and is now mostly black again.............
    December 10, 2017, 16:55:37
  • hoverfly: everything has gone white. :shrug:
    December 10, 2017, 12:21:29
  • Icefever: Hi Andy I have a prob with the Tx.  it's bound to the rx but when I try the either gimbel nothing happens....I have a green led on the rx..when connected to beta I can run up the motors but nothing else??help
    December 10, 2017, 09:23:12
  • Andy7: Perfect day to have shaved off the beard.... :(
    December 10, 2017, 09:17:17
  • Saleem: Just dont do it facing the wind
    December 09, 2017, 19:36:25
  • hoverfly: AGHHH  yellow snow warning  :laugh:
    December 09, 2017, 18:49:57

Who's Online

Theme Selection



Forum Default

Permanently

Author Topic: PDB  (Read 710 times)

Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
PDB
« on: April 19, 2017, 20:11:39 »
Hi all,

I was wondering if anyone else has problems with un reliable pdbs and if anyone can recommend a good one ?

Sent from my SM-G935F using Tapatalk


Offline Revs

  • aka Paul
  • Site Sponsor
  • Trade Count: (1)
  • Hero Member
  • *****
  • Posts: 3256
  • Liked: 1028
  • Country: gb
  • If it ain't broke... it will be soon!
Re: PDB
« Reply #1 on: April 19, 2017, 20:19:24 »
Hi all,

I was wondering if anyone else has problems with un reliable pdbs and if anyone can recommend a good one ?

Sent from my SM-G935F using Tapatalk

Are we talking a basic PDB or one with regs, etc? I';d just get a branded one from a reputable supplier.

Offline Cheredanine

  • Trade Count: (0)
  • Hero Member
  • *****
  • Posts: 3997
  • Liked: 889
  • Country: gb
  • Everything you have been told is a lie
Re: PDB
« Reply #2 on: April 19, 2017, 20:52:05 »
As above need more detail, frame, supplies, what is it powering

Offline shawdreamer

  • Trade Count: (0)
  • Hero Member
  • *****
  • Posts: 1141
  • Liked: 645
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #3 on: April 20, 2017, 09:40:05 »
I always lean towards Matek if using a pdb, their nothing special but theyve always proven to be rock solid and reliable.

If your using a cc3d fc though consider using one of their new v2.0 fc';s with built in  12v & 5v becs, makes a build so much easier and soooo much tidier ~~

http://www.banggood.com/search/cc3d-v2.0.html
550 custom H-copter
zmr250
Reaper250 V.1
Reaper250 V.2
ViceVersa250 XL
zmr250Hybrid
250 Twinboard
Dji Spark clone
Project Sparkie
https://www.thingiverse.com/shawdreamer/designs

Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #4 on: April 20, 2017, 15:36:38 »
Thanks for your help guys it';s much appreciated.
I';m having issues firstly I had an esc burst into flames the other day. It was on a qav x build on 20 amp cicadas. Anyway during flight I was noticing on my vtx that every time i used the throttle i was getting inteferenece through the goggles. As it eveything had worked fine on my other quad i decided its the pdb. So took my props off and during testing with some throttle on and looking through the goggles one of the esc burst into flames. So im at a bit of a loss with it at the mo. Perhaps applied too much power for too long on the 20amp and that caused it to overheat I don';t know. So I have a spare matek 3s-6s pdb and some 30 amp dys d shot esc that I';m going to try and hopefully that will work

Sent from my SM-G935F using Tapatalk


Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #5 on: April 20, 2017, 15:38:45 »
As above need more detail, frame, supplies, what is it powering
It';s a qav x , 4s or 5s lipos being used on a pdb that says 9 to 18v matek and it had 20amp cicada esc

Sent from my SM-G935F using Tapatalk


Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #6 on: April 20, 2017, 15:41:05 »
I always lean towards Matek if using a pdb, their nothing special but theyve always proven to be rock solid and reliable.

If your using a cc3d fc though consider using one of their new v2.0 fc';s with built in  12v & 5v becs, makes a build so much easier and soooo much tidier ~~

http://www.banggood.com/search/cc3d-v2.0.html
Yes thanks I have only used pdbs from matek and one from armattan . This is is the only one i think I';m having problems with on this build. My other builds have been fine so was just trying to see if anyone else has had issues with pdbs and could recommend any .
Thanks for your reply mate

Sent from my SM-G935F using Tapatalk


Offline Cheredanine

  • Trade Count: (0)
  • Hero Member
  • *****
  • Posts: 3997
  • Liked: 889
  • Country: gb
  • Everything you have been told is a lie
Re: PDB
« Reply #7 on: April 20, 2017, 15:43:36 »
4s =16.8v, 5s = 21v

That pdb is not 5s capable, you are lucky it hasn';t burst into flame and taken the fc with it.
The 20a escs probably blew due to too much current though, the motors try and spin at a certain rate per volt, so 5s tries to make them spin harder, that draws more amps.

What motor/prop/esc specifically were you using?

(My concern is it is likely that although you are likely to blow the pdb that';s not causing your esc to blow or lines in fpv, new pdb for qav is pretty easy, what flight controller are you using?)

Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #8 on: April 20, 2017, 16:11:23 »
Yes I was only using a 4s when it burst into flames. Thanks for the info with that. I take it i need to consider what voltage the pdbs can handle as well before installation.
It';s a naze32 afroflight . Runcam swift 2 and tbs unify hv. Both the camera and the vtx have been working beautifully on my other quad. The lines on the screen aren';t your usual break up or anything like that and it only happens when you apply a decent amount of throttle so my theory was there some level of interference bleeding out voltage intermittently over to the vtx.

Sent from my SM-G935F using Tapatalk


Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #9 on: April 20, 2017, 16:12:44 »
Are we talking a basic PDB or one with regs, etc? I';d just get a branded one from a reputable supplier.
It';s a matek 9v to 18v

Sent from my SM-G935F using Tapatalk


Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #10 on: April 20, 2017, 16:14:36 »
Here';s my quad anyway initially it was working amazingly. 2207 2600kv gold Cobras it';s really punchy

Sent from my SM-G935F using Tapatalk


Offline Cheredanine

  • Trade Count: (0)
  • Hero Member
  • *****
  • Posts: 3997
  • Liked: 889
  • Country: gb
  • Everything you have been told is a lie
Re: PDB
« Reply #11 on: April 20, 2017, 17:06:30 »
So you didn';t cover props but assuming any sort of 5 inch, that is a bad combo

Who chose components? The high kv cobras spinning decent 5 inch props will draw well over 20amps on 4s, never mind 5s. They are under specified.

I would look at 30amp really. And if you are gonna run 5s the escs will need to be 5s capable.

Your vtx/cam combo is an excellent one but it really needs a 12v supply
The naze needs a 5v supply (again a weak choice given the rest you your kit, it just DNA run the run loop times to push the motor changes quick enough.


Anyway
Pdb:
http://www.hobbyrc.co.uk/lumenier-4power-plus-pdb-5v10v-reg-184a-curr
Power the vtx and cam off the 10v reg.

Honestly I would ditch the naze, get a decent f3.

Your lines on the vtx are probably due to slight oscillations at high throttle which the fc reacts to by speeding in and breaking motors, this produces electrical jitter. Thinks that will help:

Soft mount the fc
Use a 1000uf low esc 35v cap across the xt60 solder pads on the pdb
Faster protocols, better tune will help too

I would suggest using something like spedix es30 blheli_s escs, but you may want to wait as wraith32 blheli_32 30a escs will be out mid may

And as I say, a decent f3 flight controller



Offline Saleem

  • Trade Count: (0)
  • Sr. Member
  • ****
  • Posts: 929
  • Liked: 173
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #12 on: April 20, 2017, 18:44:09 »
It';s a matek 9v to 18v

Sent from my SM-G935F using Tapatalk

Your esc are using what i would describe as wrong neg point mate!

Offline MulderUFO

  • Trade Count: (0)
  • Newbie
  • *
  • Posts: 25
  • Liked: 0
  • Country: gb
  • Tricopter, one prop short of a Quadcopter
Re: PDB
« Reply #13 on: April 23, 2017, 17:49:08 »


So you didn';t cover props but assuming any sort of 5 inch, that is a bad combo

Who chose components? The high kv cobras spinning decent 5 inch props will draw well over 20amps on 4s, never mind 5s. They are under specified.

I would look at 30amp really. And if you are gonna run 5s the escs will need to be 5s capable.

Your vtx/cam combo is an excellent one but it really needs a 12v supply
The naze needs a 5v supply (again a weak choice given the rest you your kit, it just DNA run the run loop times to push the motor changes quick enough.


Anyway
Pdb:
http://www.hobbyrc.co.uk/lumenier-4power-plus-pdb-5v10v-reg-184a-curr
Power the vtx and cam off the 10v reg.

Honestly I would ditch the naze, get a decent f3.

Your lines on the vtx are probably due to slight oscillations at high throttle which the fc reacts to by speeding in and breaking motors, this produces electrical jitter. Thinks that will help:

Soft mount the fc
Use a 1000uf low esc 35v cap across the xt60 solder pads on the pdb
Faster protocols, better tune will help too

I would suggest using something like spedix es30 blheli_s escs, but you may want to wait as wraith32 blheli_32 30a escs will be out mid may

And as I say, a decent f3 flight controller

Thanks for your in depth reply cheradanine ,

I have some dys d shot 30 amp 3-6s should be ok. And a pdb that claims yo be up to 6 s.
After your comments regarding the naze I';m starting to think that';s what could be causing it the video "lines" so I';ll probably either swap for a kiss fc or sp racing. As for the 1000uf across the solder pads  what is That exactly for? it looks like a capacitor is that to absorb voltage or something?



Sent from my SM-G935F using Tapatalk


Offline Cheredanine

  • Trade Count: (0)
  • Hero Member
  • *****
  • Posts: 3997
  • Liked: 889
  • Country: gb
  • Everything you have been told is a lie
Re: PDB
« Reply #14 on: April 23, 2017, 18:12:59 »
Basically yes, it will smooth out voltage spikes, specifically look for a 1000uf low esr 35 capacitor, e.g.:
https://www.amazon.co.uk/1000uf-105c-EEUFC1V102-Panasonic-x4pcs/dp/B00LX6PHYY

Do think voltage noise/spike from esc will be causing the lines, but upgrading naze to something better (no experience with kiss, would recomend lux v2 over spr) will improve flight performance