There are such devices that, when clapping, can turn on or off.
can you turn off TV? Do not turn off lights!
I believe the signals from the electronic devices could interfere with cockpit and/or tower electronics/signals.
67% of people never turn electronic devices off, and 22% only turn them off when going on vacation.
LG's simplink system can control all of your connected home theater devices with one remote control. If you press the SIMPLINK remote control button, you can switch on and control all devices connected by HDMI. Once you turn off your LG TV, all of those devices will also turn off.
A permissive relay is one that "permits" other electrical devices( relays, swithches, machine etc.) to become active ( turn on) or deactivated ( turn off).
Altimeters don't normally need turning off. They are passive devices that work without power. They use an aneriod system, which is mechanical.
Yes, you can bring a PSP on a plane, as long as electronic devices are permitted, and you turn off wireless communications.
Turning the narrator on and off for the visually impaired depends on the device you are using. Check your devices settings folder or refer back to the user manual.
Recent motherboards may still allow power to be given to some peripherals even when the computer is turned off, such as usb devices which can be charged even when the PC is off. There may be an option in bios to turn this off or you could just turn the PC off at the mains when you are finished using it.
Because if there are parallel paths the current can take, the contacts will not shut off or turn on the device.
It allowed the CPU to turn off moniter or devices to keep the system cooler, then they would restart by a touch of the keyboard.