SG90 Servo Disrupts Receiver While Attached

[KonradMcClure]

I've been trying to put together a test program to test each component together before it's assembled, and I ran into an odd problem that took awhile to pin down.

I'm not sure if something changed in the libraries, but while the SG90 Servo is attached (myservo.attach(A5);) and the TSOP4838 is enabled (irrecv.enableIRIn();) the servo motor "vibrates" idly and the IR receiver just pumps out random values. I assume some kind of interrupt or timer is shared between the two and disrupting them, but I haven't been able to nail it down. Loading up the plotter sketch, the same thing is happening. The only difference I can find in our hardware is that my TSOPs only work from 4.5-5.5V rather than the lower voltage version you had used.

I'm currently trying to address it by only temporarily attaching the servo when it needs to move, but I have the feeling that's not going to be viable in a real test. If you have any ideas as to what might be causing this I'd love to hear it.

[snebragd]

Hi Konrad! I haven't experienced problems with clashes of servo and IR. I Cannot say I have tested everything thoroughly in isolation the way you are doing, so it might be that I have this problem but haven't noticed. As you suggest doing attach/detach for each move operation will likely work. I think the servo will stay in position when idling unless the printing surface is full with obstacles... :-) I'm physically separated from my arduino stuff for a few weeks so I can unfortunately not try this out myself right now. Cheers, Fredrik

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On Tue, Jul 14, 2020 at 7:59 AM Konrad McClure ***@***.***> wrote: I've been trying to put together a test program to test each component together before it's assembled, and I ran into an odd problem that took awhile to pin down. I'm not sure if something changed in the libraries, but while the SG90 Servo is attached (myservo.attach(A5);) and the TSOP4838 is enabled (irrecv.enableIRIn();) the servo motor "vibrates" idly and the IR receiver just pumps out random values. I assume some kind of interrupt or timer is shared between the two and disrupting them, but I haven't been able to nail it down. Loading up the plotter sketch, the same thing is happening. The only difference I can find in our hardware is that my TSOPs only work from 4.5-5.5V rather than the lower voltage version you had used. I'm currently trying to address it by only temporarily attaching the servo when it needs to move, but I have the feeling that's not going to be viable in a real test. If you have any ideas as to what might be causing this I'd love to hear it. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#4>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABN4DVSQ3SO5TYXADGXHKYLR3PX5VANCNFSM4OZFOJ7A> .