Opto-isolator
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An opto-isolator is an electronic component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the
Cross section of an opto-isolator
Optocoupler on a circuit board. Note the pair of class Y1 safety capacitors.
A reflective pair (left) and two slotted couplers with the light paths in purple
Thyristor
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A thyristor is a solid-state semiconductor device which can be thought of as a highly robust and switchable diode, allowing the passage of current in one direction but not the other, often under contr
Opto-isolator
…opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals and can act as an electronic switch, but some techniques allow…
Thyristor
A bank of six 2000-amp thyristors (white disks arranged in a row at top, and seen edge-on)
Valve hall containing thyristor valve stacks used for long-distance transmission of power from Manitoba Hydro dams