Many people use the ubiquitous bit of tech day in, day out with little to no regard for what the symbols mean. One of the most common is on the on/off switch to your telly. According to an ...

This language-agnostic design was meant to convey that a switch or button ... device both on and off. Fun fact: Back in the ...

When the switch is tuned off, the circuit is open so the electrical energy stops flowing. Circuit symbols are really useful when designing the electrical circuits inside the things we use.