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How to connect a 220 Volt relay with Arduino Uno to control an immersion rod  heater??
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You need to use 5V or 12 V relay for isolation.  See the the link http://playground.arduino.cc/uploads/Main/relays.pdf for reference. You need to choose the rating of the relay in terms of AMPs that can handle the load of your immersion rod.
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do not double post,
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Duplicates merged.
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can any of these SSR be used for my purpose???

http://www.ebay.in/itm/FOTEK-25-AMP-SSR-SOLID-STATE-RELAY-DC-TO-AC-Input-3-32VDC-Output-90-480VAC-/161230249000?pt=LH_DefaultDomain_203&hash=item258a125c28&_uhb=1

http://www.ebay.in/itm/Inventa-SSR-Solid-State-Relay-25A-With-Heat-sink-ZA2524D432-/331157213682?pt=LH_DefaultDomain_203&hash=item4d1a8211f2&_uhb=1
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http://embeddedsystem1.blogspot.in/search/label/relay
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