Heater wrote: ↑
Sat May 23, 2020 5:04 pm
There is no danger of your shorting anything out with your fingers. Your skin resistance is far too high.
Static electricity is the killer. In low humidity environments a human body can accumulate significant static electric charge. Thousands of volts. You may have noticed the effect when combing your hair, taking off a shirt and so on. I used to get the pin pricks of sparks as I touched door handles in our office after walking across the room.
Those static discharges from your fingers can kill the transistors in GPIO inputs and so on.
In properly equipped electronics labs one has anti static mats and straps ones wrist to ground with an anti-static strap.
Having said that, I have never bothered at home and have never seen static cause a problem.
Of course I have to be careful running a naked Pi on my desk. It's generally covered in bits of snipped off wire and an other junk that couls short things out.
Steve Wozniak of Apple Computer fame produce a video on the topic and static electricity has killed more than its share of solid state electronics products, in particular, PCs, in the hands of the careless. A development house I worked at had an extraordinary rate of network card failures, and I have seen the IT tech walking around the nylon carpeted office located in dry Southern California in leather soled shoes and a handful of bare, unprotected NICs. Surprise!
The RPi design is very well protected as I (and probably many others) have had our ham fists all over the board and its GPIO pins without failure. Still, it pays to handle only by the edges...if you can. I live in Hawaii with relative humidity of 50% or greater all the time and I am usually barefoot on bare concrete floors. You are probably not so fortunate.