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Choosing a relay? Answered

I was about to make a project, I was all set then I realized that I hadn't chosen a relay yet. (Circuit http://2.bp.blogspot.com/-IdzxyPF4WYE/UfBCWb0deoI/AAAAAAAADZs/1-eYB2ufQCA/s1600/Clap+Switch.jpg) As I didn't know anything about relays or AC voltage I started studying. At the end I came to this. As I will be controlling lamps with either incandescent bulbs or led bulbs and phone chargers a 5v, 220v 1a relay will be enough, since Bulb 0.27 A, LED 100 MiliAmps and Phone Charger a few watts. So the question is that are my calculations right and what else should I know about relays e.g operating voltage resistance and other stuff. Oh and is there a 0.5a relay and if there is will that be enough?

Thanks in advance.
-Prickly Potato 

Discussions

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Downunder35m

3 years ago

Since neither the price ,nor the function make any difference, better go for a 5 or 10A relay.
It is always better to go bigger here so the contact of the relais have a longer life ;)

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SA-DIYDownunder35m

Answer 3 years ago

Price is an issue.........since im funding this project myself. Is 2a relay good enough? Since ALL im gunna plug in is a lamp and phone charger (not at once)

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SA-DIYDownunder35m

Answer 3 years ago

Ok thats settled now can you choose a fuse for me? 2a relay and i live in Pakistan. Oh and tell how to wire it ? :)

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rickharrisSA-DIY

Answer 3 years ago

Google relays so you understand how they work and how to connect them.

Your relay may have a data sheet you can refer to.

3 amp fuse if you can get one. A fuse to be useful should in simple terms be as close to the load current as possible.

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seandoguerickharris

Answer 3 years ago

+1. Nothing we can say will beat what you can easily google.

Google "relay circuit images"