Free Flight FF Auto Balance Controller with 3D Acceleration Sensor For QuadCopter - Page 98 - RC Groups
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Feb 11, 2012, 10:15 PM
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Actually the ulink clone I'm getting claims to be 50Mhz... We'll see how it goes, lo..
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Feb 11, 2012, 10:47 PM
OpenAeroVTOL developer
HappySundays's Avatar
Quote:
Originally Posted by timecop
Actually the ulink clone I'm getting claims to be 50Mhz... We'll see how it goes, lo..
That'll be because yours is a clone of a ULINK Pro originally worth about $1500
Feb 12, 2012, 03:18 AM
manuLRK
So, i see STM32 platform is still for mcu experts. I am not. Sorry.

Thanks for the feedback,
manu
PS:but still hope i could get my hands on it.
Feb 12, 2012, 06:56 AM
Registered User
snapper1234's Avatar
pid parameter optimized for 330 + 500 mm frame (from china pilot)
to the test with no guarantees!

" this parameter make your copter more stable "

FF V1.3, which is the difference, color ?
Last edited by snapper1234; Feb 12, 2012 at 09:05 AM.
Feb 12, 2012, 12:18 PM
Registered User
abriosi's Avatar
guys im thinking on getting this board. Is there anyone on europe who has a extra i can buy?(i dont want to wait 4 weeks for china postage) also is this board better than the crius? in terms of autoleveling etc..
Feb 12, 2012, 02:11 PM
Registered User
anfarol's Avatar
Quote:
Originally Posted by abriosi
i dont want to wait 4 weeks for china postage...
From GLB you can choose DHL. It will arrive in 5-7days ( at least in Italy). Of course it's not cheaper as airmail but if you can't wait...
Feb 12, 2012, 02:23 PM
Registered User
Quote:
Originally Posted by abriosi
guys im thinking on getting this board. Is there anyone on europe who has a extra i can buy?(i dont want to wait 4 weeks for china postage) also is this board better than the crius? in terms of autoleveling etc..
I have one brand new still in the bag.
Send PM or email.

Geotete
Feb 12, 2012, 04:01 PM
Registered User
Quote:
Originally Posted by HappySundays
That'll be because yours is a clone of a ULINK Pro originally worth about $1500
Any hints which of these clones you guys bought and are using successfully? I see several on Ebay, but I'm just wary ordering something from unknown seller in China. So it's great if you guys had success stories to tell!
Feb 12, 2012, 05:47 PM
Suspended Account
Quote:
Originally Posted by snapper1234
FF V1.3, which is the difference, color ?
Maybe they fixed i2c pullups, 12v going into mcu, added front arrow, besides that I don't see anything diff.
Feb 12, 2012, 05:50 PM
Suspended Account
Quote:
Originally Posted by javemtr
Any hints which of these clones you guys bought and are using successfully? I see several on Ebay, but I'm just wary ordering something from unknown seller in China. So it's great if you guys had success stories to tell!
I bought both from powermcu.com and so did several other people I referred to them.
Just chat the seller guy on Skype, and he ships stuff out same/ next day from HK.
Feb 12, 2012, 08:57 PM
Registered User
snapper1234's Avatar
Quote:
Originally Posted by timecop
Maybe they fixed i2c pullups, 12v going into mcu, added front arrow, besides that I don't see anything diff.
no i2c pullups, no other changes, only the color is different !
Feb 12, 2012, 11:08 PM
Registered User

FF board X400 vs DJI F450


Hello ALL,

I am new to the quad helis, although I have been reading everything I can about these. I decided to bite the bullet and get an ARF from goodluckbuy.com.

Does anyone have a recently purchased X400 with FF board?

Is the firmware stable with the controllers from GLB?

What ARF configuration is a good starter? X400 or DJI F450?

Thanks!
Nick
Feb 13, 2012, 08:30 AM
Registered MisUser
whiteturbo's Avatar
@timecop,

Are you going to be making your cloned/improved Free flight FF available for sale in the future, if so put me on the list.

Ray
Feb 13, 2012, 01:31 PM
Dance the skies...
Tom Frank's Avatar
Quote:
Originally Posted by HappySundays
OK, before I changed my pull-up resistors I had a look and the actual SCL, SDA signals were pretty good and at what looked like 400kHz. That was surprising.
But what was much more suprising were the enormous glitches I was seeing on the i2c lines on power-up. I swear I was occasionally seeing close to 12V on those lines that quickly settled to 3.3V. Insane.
So, I looked at the 3.3V line itself (at the SWD connector) and occasionally saw this hideous harbinger of doom...


I think this is why some FF boards detonate. Nothing to do with ESD.
It's a miracle my board works at all. That's 11.3V for almost 20ms. WTH?

@TC - you say you removed your PSU components, but if so, did you replace them with a 3V3 linear regulator from the 5V supply? After seeing those spikes it sounds a good plan. No luck with either version of software though.
Edit: Scrub that - I see that the switchmode goes to 5V, then a linear to 3.3V...So how does a huge spike make it to 3V3?
...
Quote:
Originally Posted by HappySundays
Yes that's what I have now done. My board now runs from an ESC as per normal. Unfortunately while the FF code seems to run in its GUI, your code doesn't. Having said that, the FF GUI doesn't show gyros so who knows if its working.
I updated to V1.24 and following the latest docs to calibrate RC and arm but while the stick throws are fine in the FF GUI, it just refuses to arm with the stick positions shown in the doc.... This is getting rapidly frustrating.
This issue put a lock on my finger as I was about to order one of the FF boards! It kind of got resolved by powering the FF board from the ESC BEC(S). So is this condition an issue with all the FF boards? How can a spike like that get through a 5V switching regulator AND a 3.3V regulator? And if the combination of the switching/linear regulators on this board is that bad, is it reasonable to expect the voltage regulation on a $10-$15 ESC or external switching BEC to be any better?

Assuming it's best advice to NOT use the onboard power supply, can you tell me the current draw of just the FF board?
Last edited by Tom Frank; Feb 13, 2012 at 03:25 PM. Reason: Deleted last paragraph... found answers in FAQs
Feb 13, 2012, 02:03 PM
Suspended Account
so timecop just made his own board? lol!


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