10-14-2016, 08:06 PM
Hi Guys,
After some frustrating 10 days, while spending most of my time searching for the root of the problem, it turned out to be caused by some Electromagnetic Interferce.
Apparently the Specsheet of the sensor incorrectly warned that it is only ESD un-protected, but they didn't mention about EMI.
I will write a bit more once i've done some more testing with more sensors, but for now - one of them that kept oscillating quite a bit, got silenced once i taped it all with electrical tape and then wrapped it with some aluminium foil and connected it with an aligator clip to ground.
Yet - it somehow depends where exactly the aluminium foil is.
Also apparently only some devices are vulnerable to EMI, while others are not.. i haven't yet succeeded in getting a consistent relation between charger, cable, assembly or place. Sometimes just switching two ports on the same charger causes EMI to start.
It is quite frustrating searching for the issue, as in the moment it gets to some reproducible results - i move something apparently unrelated and the issue stops
i will send you more details over the weekend
Regards, Vladimir
After some frustrating 10 days, while spending most of my time searching for the root of the problem, it turned out to be caused by some Electromagnetic Interferce.
Apparently the Specsheet of the sensor incorrectly warned that it is only ESD un-protected, but they didn't mention about EMI.
I will write a bit more once i've done some more testing with more sensors, but for now - one of them that kept oscillating quite a bit, got silenced once i taped it all with electrical tape and then wrapped it with some aluminium foil and connected it with an aligator clip to ground.
Yet - it somehow depends where exactly the aluminium foil is.
Also apparently only some devices are vulnerable to EMI, while others are not.. i haven't yet succeeded in getting a consistent relation between charger, cable, assembly or place. Sometimes just switching two ports on the same charger causes EMI to start.
It is quite frustrating searching for the issue, as in the moment it gets to some reproducible results - i move something apparently unrelated and the issue stops
i will send you more details over the weekend
Regards, Vladimir