Delete comment from: Ken Shirriff's blog

Akshay said...

Hi Ken,

Interesting article. At the beginning, you mentioned "noisy power that cause touchscreen malfunctions". I'm going through the source you linked to, but I have had this question in my head for a while now, so I'll just put it here.

In India, we have 230V/50Hz and my Samsung charger says 150-250V/50-60Hz on the label. For some reason, Indian Railways has 110V power sockets in trains. When charging phones in the train, it always happens that the touchscreen goes wonky. Different phones show different behaviour, from totally non-responsiveness to very heavy lag or some offset in the touch location.

So that would mean that the power coming in from the train sockets is very noisy. In that case, how much blame do we assign to the charger for not filtering it out?

Thanks.

Oct 29, 2012, 8:19:19 AM

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