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luis80
New Member

2 Posts
Posted - Sep 27 2010 :  10:22:41 PM  Show Profile  Reply with Quote
Hi, i need to swith on or off a 120VAC lights with a 12VDC, 60 to 800mA. I think i could do this with a relay but i'm not shure. I guess so i need a diode to protect the relay. Can you guys help me? If it's possible, can you send me a diagram?
Thanks

audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Sep 28 2010 :  08:19:53 AM  Show Profile  Reply with Quote
You need a relay and a diode across its coil connected in the correct direction.
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luis80
New Member

2 Posts
Posted - Sep 28 2010 :  12:58:16 PM  Show Profile  Reply with Quote
Thanks audioguru... that's wath i thought
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dollat7852
Apprentece

Nigeria
7 Posts
Posted - Sep 29 2010 :  08:35:19 AM  Show Profile  Reply with Quote
yes it can be done as you think just be sure you buy the correct rated relay and be sure the relay is an AC relay
dollat
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audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Sep 29 2010 :  7:35:51 PM  Show Profile  Reply with Quote
quote:
Originally posted by dollat7852

yes it can be done as you think just be sure you buy the correct rated relay and be sure the relay is an AC relay

What is an AC relay?
The load and contacts use AC but the coil uses DC.
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Oct 02 2010 :  10:49:35 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
I think he means a relay with appropriate contact ratings to handle the higher voltage AC instead of, say, a 12V automotive relay.
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Jessica99
New Member

1 Posts
Posted - Oct 25 2010 :  11:15:41 AM  Show Profile  Reply with Quote
Try to look at this picture. .

This uses a 24 volt DC supply and your using 12V. You just replace the 24 volt to 12 V. This would be a reference for you. Hope this helps. For more information, you can search google for transistor switch circuits.
Edited by - Jessica99 on Oct 25 2010 11:17:21 AM
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