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Pin interference

Former Member
Former Member over 9 years ago

Hi,
New to this forum so I hope this is the correct place to ask for help.
I have searched, both inside and outside of this forum but can't find anything to help me.

 

 

My setup is located in my car

My problem is that I have a HAM-radio close to the arduino ( about 50cm) and when I set the radio to transmit at >30W, one or more pins on the arduino goes high and triggering my system.

I have a pulldown resistor at 10K on each pin but that doesn't help.

Is there a way for me to shield the arduino from this interference?

The systems share a 12V-line but have there own grounds to the battery.

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  • Robert Peter Oakes
    0 Robert Peter Oakes over 9 years ago

    You could also try placing a very small value cap on the pins to ground, perhaps 50pF ish, this would present a short to RF but not tot the real control signals, though I think a slightly more elabourate filter may be better, if you have them, a small inductor in series with the input pins or loop the wires through a ferrite core

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  • mcb1
    0 mcb1 over 9 years ago in reply to Robert Peter Oakes

    We are assuming the problem is coming in the inputs.

     

    Perhaps bellator could include the code for the Arduino, and maybe the connections, and we could help isolate it.

     

     

    Mark

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  • Robert Peter Oakes
    0 Robert Peter Oakes over 9 years ago in reply to mcb1

    True, a few photos, the schematic and code would be a great help

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  • Robert Peter Oakes
    0 Robert Peter Oakes over 9 years ago in reply to mcb1

    True, a few photos, the schematic and code would be a great help

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