That’s nothing to do with static electricity, it’s capacitive coupling through the safety capacitors in the power supply. The chassis sits at 90vac or so as a result, it’s not a safety issue it’s FCC compliance for emitted noise.
That’s nothing to do with static electricity, it’s capacitive coupling through the safety capacitors in the power supply. The chassis sits at 90vac or so as a result, it’s not a safety issue it’s FCC compliance for emitted noise.
Is this generally true for laptops / phones?
I've often wondered why I can tell by touch whether a device is charging or not from the slight "vibration" sensation I get when gently touching the case.
For ungrounded / 2-prong outlet devices, yeah.
It's often noticeable if you have a point contact of metal against your skin; sharp edge / screw / speaker grill, etc. Once you have decent coupling between your body and the laptop, you won't feel the tingle / zap.
They're called Y-caps if you want to delve deeper into them and their use in power supplies.
I get that too. I was wondering if it was just me.