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From: | Balazs GATI |
Subject: | Re: [Paparazzi-devel] PPM encoders with non-blinking LED |
Date: | Thu, 06 Jan 2011 15:58:36 +0100 |
User-agent: | Mozilla/5.0 (Windows; U; Windows NT 5.1; hu; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 |
Chris!I have got two PPM encoders (cant remember the version). None of them blinks. But one of them definitely works for one year. (The other is a spare one: never flown yet.)
Balazs Department of Aircraft and Ships Budapest University of Technology and Economics Twog + EasyGlider + 10 hours flightime in total 2011.01.06. 14:34 keltezéssel, Chris Gough írta:
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 -- . _______________________________________________ Paparazzi-devel mailing list address@hidden http://lists.nongnu.org/mailman/listinfo/paparazzi-devel_______________________________________________ Paparazzi-devel mailing list address@hidden http://lists.nongnu.org/mailman/listinfo/paparazzi-devel-- .
-- Balazs GATI, PhD Department of Aircraft and Ships Budapest University of Technology and Economics Address: Budapest Stoczek u 6. J. ép. 423 1111 Tel: +(36)-1-463-1960 Fax: +(36)-1-463-3080 Homepage: http://rht.bme.hu/~gatib/
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