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How Does a Solid State Relay Work?

Answer

Solid state relay uses opto-coupling to provide complete electrical isolation between its low power input circuit and its high power output circuit. When the output switch is 'open' it has a nearly infinite resistance and a very low resistance when 'closed' .It can also be used to switch either AC or DC currents. Devices that are used in the control of high voltage or high power equipment need to have good electrical insulation between their high voltage output and low voltage input. Relying on a layer of silicon a few atoms thick to provide the required insulation is not really an option in such conditions.
Q&A Related to "How Does a Solid State Relay Work?"
1. Connect either the positive control lead to the positive source, or the negative lead to the negative source that will operate your relay, depending on your circuit application
http://www.ehow.com/how_5821400_wire-solid-state-r...
Solid state relays have no moving parts and do not spark, as there are no contacts. They are more expensive and need to be matched closely to the voltages and currents used. They
http://wiki.answers.com/Q/What_are_the_application...
I have some idea, but I would prefer not to suggest until I am sure. However, you can look at http://www.sparkfun.com/search/r..., there are solid-state relays under $5. You can also
http://www.quora.com/Which-solid-state-relay-shoul...
Solid state hard drives are either NAND flash or SDRAM. NAND writes information by sending small charges of electricity through a film and onto silicon. SDRAM is temporary memory
http://answers.ask.com/Computers/Hardware/how_do_s...
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