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Re: [Paparazzi-devel] 5v onboard regulator

From: Andrew S
Subject: Re: [Paparazzi-devel] 5v onboard regulator
Date: Mon, 17 Aug 2009 08:43:17 +0400

Hello, me interested. Max voltage I used at the moment was 4 lipo, and future 
problem would be insufficient power for servos. Also good thing about backup 
battery. In case of larger autopilot i think you dont have to use micro molex 
connectors, especially for servos, and better would be a separate gps receiver.
Also there is one thing for reliability - now 3v for MC is made from 5v for 
servos, and in case of overloading we have reset of board, this must be set 
right. I agree with Chris about high current lines near MK, it is acceptable 
for small system, but must be redesigned for larger. Also problem was with 5V 
modems. When I powered them from 5v line, they didnt work because of noise from 
servos, and I had to put separate 7805 for it. 12v bec is also good solution, 
it required in order for some payloads powering, some videotransmitters needs 
it etc. 

17.08.09, 05:50, "Nicholas Wagner" <address@hidden>:

> I am working on a board that has a separate 12V and 5V switching
> regulators for servos and an input for a battery for an autopilot and
> servo battery backup.  Is this something that anyone else would want?
> Vin for the board is about 50V  This would allow for the autopilot to
> be used for much larger planes.. is this something anyone else would
> be interested in?
> Nick
> On Mon, Aug 10, 2009 at 11:35 AM, chris wrote:
> > I never experienced a crash due to an autopilot problem until i connected
> > one servo directly to the autopilot.
> > After the incident i removed it and all flights have been perfect.
> > From the start i used an external 10A bec for powering the servos.
> > I think the onboard regulator be changed for a 3.3v @ 2A or more output
> > with the parallel removal  of the linear 3.3v regulator.
> > Even if the 5v regulator is upgraded to a high amperage one i don't think
> > that it is wise to run
> > high current and noisy lines from servos  inside the autopilot's pcb.
> > I keep the high current path for the servos well outside the autopilot's
> > pcb.
> > Chris
> >
> >
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> >
> >

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