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Very unusual problem encountered last week flying FPV with the Neo 2

JustDavid

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Let me start with some background. I have Peripheral Neuropathy, and I have a Spinal Cord Stimulator Implant to help manage the pain. There are two leads that run inside my spinal column up to I think C4/C5. The implant sends an electrical signal to the major nerve trunks for my arms which overrides and blocks the pain signals. Works quite well and I have had this implant in for 9 years, the first one was in for 10 years. My pain level had been up, so I had increased the output of the stim to 8 millivolts, up from the normal 6 millivolts.

So, now to the point of this story. I fly FPV with the Motion Controller in my left hand because I am left handed and it is more 'normal' for me. I have done this several times, but that day was the first time I had any issues. I was prepping for flight and I was getting 'Interference in MC Location' errors in the Goggles. I had seen this before when the MC is sitting in my lap and I have my vape close, but my vape was on the table beside me. There was nothing electronic or electrical anywhere close to my left hand.
I put the controller in my right hand, no error. Back in my left hand, error returns. I finish the short flight using my right hand.

In contemplating this issue, I asked Gemini about it. It is possible that the stimulator at 8 millivolts was producing an electromagnetic field in my left arm which was strong enough to be interfering with the IMUs in the Motion Controller. My next 2 flights with the MC were error free, but I had also turned down my stimulator to my usual 6 millivolts.

I have been around electronics all my life and I know strange and spooky things can happen with electronics. That was a very bizarre, and interesting couple of days.
 
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Sounds like you have identified the issue.
 
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I wonder if a compass held above your arm would detect a slight anomaly in the reading if turned up to 8mv? 🤔

.
 
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I don't have a magnetic compass to test that theory . . .
 

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