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The Time Constant of an RC Circuit
The Time Constant of an RC Circuit

... positive and negative charges on opposing terminals known as “plates” - which may or may not actually be plate-like. Capacitors trace their lineage to the middle of the Eighteenth century and the invention of the Leyden jar. For forty years, the biggest names in natural philosophy spent time in the ...
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Opto-isolator



In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs.A common type of 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, but some techniques allow them to be used with analog signals.
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