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

From: Chris Gough
Subject: Re: [Paparazzi-devel] PPM encoders with non-blinking LED
Date: Fri, 7 Jan 2011 00:14:02 +1100

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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>> Paparazzi-devel mailing list
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