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What's your DIY project?

Ammo9 VIP Member Enter your message here... Posts: 1,814 Likes: 2,667	What's your DIY project? Dec 9, 2014 20:33:54 GMT 10 via mobile Quote Select Post Deselect Post Link to Post Back to Top Post by Ammo9 on Dec 9, 2014 20:33:54 GMT 10 m.jaycar.com.au/m_productView.asp?ID=SL3975#7

graynomad
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What's your DIY project? Dec 9, 2014 21:07:47 GMT 10 Ammo9 and You Must Enter A Name like this

Quote

Post by graynomad on Dec 9, 2014 21:07:47 GMT 10

Dec 9, 2014 20:18:15 GMT 10 Ammo9 said:

I'm not getting the point of the relay. Is it a switch to turn on a switch? The switch I've got coming is rated to 20A I think.

Might I need to add a resister to the circuit to reduce the amps and volts through the led?

Using a relay allows you to run small wires to the switch rather than 20A wires. This may or may not matter, it depends on how far away the switch is from the thing being switched. A relay also allows you to use a nice small switch, once again this may or may not matter, sometimes a small switch is good, other times you want a big switch anyway for mechanical reasons.

If you are powering a normal LED you MUST use a resistor in series with the LED, unless it is one of those that have one inbuilt resistor then of course you don't have to add one, these are sometimes marketed as a "12v LED" etc.

EDIT: didn't see your link, will have a look.

EDIT2: OK, that's ready to rock n roll directly with 12/24 volts, you don't need a resistor.

Last Edit: Dec 9, 2014 21:11:29 GMT 10 by graynomad

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