It's called Opto Isolator.

See also Corrosion Galvanization Galvanic anode References External links Galvanic Corrosion and Other Types of Corrosion Corrosion Doctors Galvanic Corrosion Theory and documents Galvanic series Electrochemistry of corrosion From the Yeager Center at CWRU.

In this case, the Opto Isolator is blinking in response to one's own blinks.

You take the patient and show him pictures on the screen and measure his galvanic skin response.

Tables and chairs and lint, nothing happens, as in normal people, but when you show him a picture of his mother, the galvanic skin response is flat.

The third class of treatment was electric shock therapy, in which an electric shock was delivered from a galvanic battery (later electromagnetic generators) via an induction coil to greatly increase the voltage.

Well, what you do is, if you take any one of you here, and put you in front of a screen, and measure your galvanic skin response, and show pictures on the screen,

Bird realised this, but continued to divide his apparatus into electrical machines, which (according to him) delivered a high voltage at low current, and galvanic apparatus, which delivered a high current at low voltage.

The electrical (as opposed to galvanic) machines then available were friction operated electrostatic generators consisting of a rotating glass disc or cylinder on which silk flaps were allowed to drag as the glass rotated.

A number of objects found in Iraq in 1938 dated to the early centuries AD (Sassanid Mesopotamia), called the Baghdad Battery, resembles a galvanic cell and is believed by some to have been used for electroplating.

Galvanic cells suffered from the inconvenience of having to deal with the electrolyte acids in the surgery and the possibility of spillages electrostatic generators required a great deal of skill and attention to keep them working successfully.

Skin conductance, also known as galvanic skin response (GSR), electrodermal response (EDR), psychogalvanic reflex (PGR), skin conductance response (SCR), or skin conductance level (SCL), is a method of measuring the electrical conductance of the skin, which varies depending on the state of sweat glands in the skin.

Well, what you do is, if you take any one of you here, and put you in front of a screen, and measure your galvanic skin response, and show pictures on the screen, I can measure how you sweat when you see an object, like a table or an umbrella. Of course, you don't sweat.