Developer

 

I've seen many times that when rebooting the board, or connecting the APM +5V rail when connected through USB, we can loose CH1 or 2 or 3 or 4 input.

 

This is caused i think by a PPM encoder crash because of noise or spikes on the +VCC rail.

 

Eventually the PPM encoder could be crashed by the main AVR reboot noise.

 

After watching to the APM schematics, it seems that the PPM encoder reset is not connected to the reset switch, neither to the USB reset output.

 

To avoid problems, i think that the PPM encoder reset input should be connected to main board reset circuitry so that it is resestted at the same time when USB connection is done or when manualy reseting the board.

 

Perhaps that the USB +5V shoud not be used as well, to avoid power spikes when connecting USB and crashing the PPM encoder.

 

Those PPM crashes could explain why some users do have strange radio behavior sometimes.

 

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • Developer

    Thanks for the info... It will be considered for the next revision.. =)

     

  • 3D Robotics
    Thanks for the report. We'll look into it.
  • Developer

     

    I've reopened issue 157 i've opened 2 weeks ago in the tracker, as i feel now that it is not a specific problem on my board.

     

     

This reply was deleted.

Activity

DIY Robocars via Twitter
Friday
DIY Robocars via Twitter
Friday
DIY Drones via Twitter
Thursday
DIY Robocars via Twitter
RT @Heavy02011: @diyrobocars : A Home-brew computer club* for Connected Autonomous Driving on Jan 23rd, 2021 https://www.meetup.com/Connected-Autonomous-Driving/events/275728684/ #Meetu…
Thursday
DIY Robocars via Twitter
Thursday
David Hori liked Isabella Domi's profile
Wednesday
DIY Robocars via Twitter
RT @Heavy02011: ⁦@diyrobocars⁩ Autonomous Driving Assembly at #rC3. join us at https://rc3.world/rc3/assembly/diyrobocars-f1tenth/ ⁦@f1tenth⁩ ⁦@DAVGtech⁩ ⁦@DWalmroth⁩…
Jan 11
DIY Robocars via Twitter
RT @chr1sa: New car designs coming for our next @DIYRobocars @donkey_car virtual race on the 23rd. Choose any one you want at race time Le…
Jan 11
DIY Robocars via Twitter
RT @RoboticMasters: Thanks to @EllerbachMaxime and the Sydney Uni Capstone Students the @donkey_car @diyrobocars simulator is getting a ma…
Jan 11
DIY Robocars via Twitter
Jan 6
DIY Robocars via Twitter
Dec 28, 2020
DIY Robocars via Twitter
An interesting line-following simulator to use with with your robocars: https://github.com/ron-grant/LFS
Dec 23, 2020
DIY Robocars via Twitter
Dec 23, 2020
DIY Robocars via Twitter
An improved version of the @IntelAIResearch OpenBot: https://diyrobocars.com/2020/12/14/an-improved-version-of-the-intel-openbot/
Dec 14, 2020
DIY Drones via Twitter
An improved version of the Intel OpenBot https://ift.tt/2KkHT8Q
Dec 14, 2020
DIY Robocars via Twitter
Dec 10, 2020
More…