Re: [Paparazzi-devel] PPM encoders with non-blinking LED

[Chris Gough]

Another observation - the "wild jitter" on adjacent servo when JP1
removed (PPM encoder unpowered) is actually a regular repeating
pattern.. .

On Fri, Jan 7, 2011 at 12:14 AM, Chris Gough
<address@hidden> wrote:
> PPM encoder is powered from from the reciever (JP1 present). I tried
> different recievers powered by different BECs (all 5v). Same behavior
> with a 5A capable BEC, Multiplex IPD receiver and only one 9g servo.
>
> I just tried two 5v BECs and JP1 removed. Still no blinking.
>
>
>
> On Thu, Jan 6, 2011 at 11:55 PM, Eric Parsonage <address@hidden> wrote:
>> Chris
>>
>> How are you powering the ppm encoder and the receiver ? I think this is the 
>> most likely cause of the problem.
>>
>> Eric
>>
>>
>> On 06/01/2011, at 11:18 PM, Chris Gough wrote:
>>
>>> I have a bunch of PPM encoders (ATMega types, v4.3 hardware and
>>> firmware) that do not behave as expected (from v4.2 manual). The LED
>>> won't blink, stays solid when powered with PWM input (expected 3Hz
>>> blink) and stays solid when PWM removed (expected1Hz blink).
>>>
>>> The PWM input to the PPM encoder seems OK because it moves a servo
>>> (and I've tried multiple reciever/servo combinations). I don't have
>>> ability to test if PPM is coming out at the moment. Reloading the
>>> firmware doesn't change the situation.
>>>
>>> I don't know if it's relevant, but if I install a servo on a Y-lead
>>> (ajacent to the PPM encoder, i.e. both getting same PWM), then
>>> removing JP1 on the PPM encoder makes the servo jitter wildly, and the
>>> servos on other channels of the same reciever jitter a little bit. All
>>> servos return to normal when the unpowered PPM encoder is
>>> disconnected.
>>>
>>> Did LED blinking behavior change between v4.2 and 4.3?
>>>
>>> Chris Gough
>>> --
>>> .
>>>
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>>
>>
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>
>
>
> --
> .
>



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