[Canberrauav] MAVProxy "line noise"

Brucebaxtersolutions brucebaxtersolutions at gmail.com
Wed Dec 16 08:22:28 AEDT 2015


Try unplugging the speed controls and power it from a USB charger.
That was when I saw the problem go away.

Sent from my iPad

On 16 Dec 2015, at 12:17 AM, Alex Satrapa <grail at goldweb.com.au> wrote:

>> On 15 Dec 2015, at 09:49, Brucebaxtersolutions <brucebaxtersolutions at gmail.com> wrote:
>> 
>> May be a long shot, but I had a lot of trouble with "noise" that was caused by voltage.
>> At 5.7v I couldn't get stable operation, but at 5.3v the problem disappeared completely.
>> 
>> Turned out the external Bec was set to 6v instead of 5v.
>> Some speed controllers have a standard setting of 6v as well.
> 
> My ESCs have built in BEC, they’re producing 6V but the power lines to the telemetry radio are 5.15V.
> 
> I’ve tried the following, with no reduction in line noise:
> 
> - Disconnecting all the servos.
> - Disconnecting the GPS and compass module.
> - Changing the orientation of the dipole antenna.
> 
> Next challenge is to use the radios with USB connections between two computers, and just pump a few books worth of text over the wire. That should isolate it to being the radios versus the quadcopter platform.
> 
> That might happen Thursday sometime. Tomorrow is electronics night at MHV and I’ll be working on my water level sensor …
> 
> Alex
> 
> 


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