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Re: [Paparazzi-devel] 5v onboard regulator

From: Prof. Dr.-Ing. Heinrich Warmers
Subject: Re: [Paparazzi-devel] 5v onboard regulator
Date: Mon, 17 Aug 2009 10:05:08 +0200
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Hello Nick,

for high power system it would be nice to have no dc current  ways from the autopilot to the drive and servo system.
A good way to eliminate EMC problems will be the use of opto couplers also for the servo counter.
One for count and one for reset.
Another free GPL autopilot project have also isolated the Servo systems with opto couplers to.
Another good idea is to isolate the RC Receiver by a opto coupler to.


Nicholas Wagner schrieb:
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?


On Mon, Aug 10, 2009 at 11:35 AM, chris<address@hidden> 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

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