Re: [Paparazzi-devel] Lisa M wiring layout

[Piotr Esden-Tempski]

Hey guys,

I sadly don't have the time to fully go through the wiring diagram and check 
everything, but I have one comment.

When you are using cheep motor controllers they have linear voltage regulators 
as BEC. I observed that if you put those in parallel you may get balancing 
problems. The easiest solution to that is to add a 1Ohm in line resistor on the 
+5V lines of the motor controllers this is normally enough to balance the motor 
controller outputs enough that you don't end up with one of the BEC provide 
most of the current and getting hot and the rest staying completely cool. :)

Cheers Esden

On Jan 4, 2012, at 12:46 PM, Bruzzlee wrote:

> Hi Simon
> Yes - V_BATT is only needed to measure the battery voltage level if you don't 
> power the board directly from the battery.
> I think you need to bridge J2 if you power the board on V_IN to be able to 
> measure the voltage level.
> http://paparazzi.enac.fr/wiki_images/Lisa_m_v1_0_sheet_3.png
> http://paparazzi.enac.fr/wiki/Lisa/M/Tutorial/FixedWing#Jumpers
> 
> At the moment I can't test anything with my board because I don't have the 
> possibility to wiring something with Picoblade (don't have the utility's 
> right now)
> 
> ---> So I'll upload the diagram to Wiki as soon as someone proved the wiring 
> (BEC powered with J1)
> 
> Bruzzlee
> 
> Am Sun Jan  1 21:56:05 2012 schrieb Eduardo lavratti:
>> Bruzzlee, the correct way to powert lisa/m is the i2c1 as you say.
>> The vin in used to monitor the battery voltage.
>> In my setupi i use 7v to power the lisa/m because the onboard regulator work 
>> very HOT with 12v.
>> So i connect the vin directo to battery and a 7v to v_batt pin.
>> 
>> 
>> 
>> 
>> ------------------------------------------------------------------------
>> Date: Sun, 1 Jan 2012 14:43:06 +0100
>> From: address@hidden
>> To: address@hidden
>> Subject: Re: [Paparazzi-devel] Lisa M wiring layout
>> 
>> Thanks for the answers.
>> 
>> @ Eduardo
>> Of course I will share my tests to the community
>> 
>> @ Eric
>> Is the Lisa M usually been powered by the I2C1 CAN plug with 11.1V?
>> Because this looks strange to me...
>> 
>> Bruzzlee
>> 
>> Am 31.12.11 21:03, schrieb Eduardo lavratti:
>> 
>>    Bruzzlee, i am using lisa/m too.
>>    Please, report your tests to the group.
>> 
>>    I have strange behavior with my copter.
>>    Some of this caused by vibration and other that i not know the cause.
>> 
>>    regards.
>> 
>>    > From: address@hidden <mailto:address@hidden>
>>    > Date: Sun, 1 Jan 2012 01:46:19 +1030
>>    > To: address@hidden <mailto:address@hidden>
>>    > Subject: Re: [Paparazzi-devel] Lisa M wiring layout
>>    >
>>    > Hi Bruzzlee
>>    >
>>    > It looks good to me and yes the ADC1 bridge is needed only for
>>    the initial bind to the Spektrum receiver (or receivers, you can
>>    use two at once)
>>    >
>>    > Eric
>>    >
>>    > On 30/12/2011, at 7:51 AM, Bruzzlee wrote:
>>    >
>>    > > Hi all
>>    > > After a long break I've continued the work on my quadrotor
>>    Lisa M project. Now I've done my wiring layout but I'm not sure if
>>    everything is correct.
>>    > > Especially the power source for the board: I2C1 CAN
>>    (V_BATT/GND) or SERVO1 (SV/GND)?
>>    > > The ADC1 bridge - I need it only for the first binding to the
>>    spectrum remote - right?
>>    > >
>>    > > I want to publish this layout on wiki - please report mistakes!
>>    > >
>>    > > thx
>>    > > Bruzzlee

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