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Thread: electronics help

  1. #11
    Resident 100HP water-cannon operator SXRguyinMA's Avatar
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    Default Re: electronics help

    yep, tried it out and it worked perfectly

    Huge +rep to you guys for the suggestions

    Spawn - thats exactly what I'm going to do with the terminal block. Basically This unit will get waterproofed (hopefully) in a project box and mounted to my roof. It will then control 16 of these strings of LEDs going up the stairs into my apartment. they're all 12v, so that idea will work perfectly Spawn!

    I'll make a small thread on it once the LEDs arrive

  2. #12
    . Spawn-Inc's Avatar
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    Default Re: electronics help

    neat idea, i would say make sure the main power feed can handle it, but it's just LED's.
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  3. #13
    Fox Furry crenn's Avatar
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    Default Re: electronics help

    Quote Originally Posted by crenn View Post
    Can you show us the wire up for the relay? I know it's not likely, but on the relay switch side, have you got a power source?
    Quote Originally Posted by SXRguyinMA View Post
    ok huge

    I think I figured it out. looking back at the diagram of it all hooked up on the .pdf, the board doesnt supply 12v. it only acts as a switch. I need to supply 12v into the connector. I'll try it when I get home
    I called it first ;P
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  4. #14
    Resident 100HP water-cannon operator SXRguyinMA's Avatar
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    Default Re: electronics help

    Quote Originally Posted by Spawn-Inc View Post
    neat idea, i would say make sure the main power feed can handle it, but it's just LED's.
    yea I'm trying to find a 12v wall wart that puts out about 1.5A. if I calculated right, at 60ma each (specs for SMD LED's say 3x20ma, as there are 3 anodes and 3 cathodes per LED), you've got 15 LEDs per strip, and 16 strips total = 1.44 Amps. This is no issue for the relay, as it will handle up to 5A.

    Quote Originally Posted by crenn View Post
    I called it first ;P
    yep you did. but with the way the board layout is, its got the positive (COM) lead traced on the board all the way to the other side (input) of the relay, So i figured the +12v went through that trace to provide 12v @ the COM side of the terminal block

  5. #15
    Resident 100HP water-cannon operator SXRguyinMA's Avatar
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    Default Re: electronics help

    found this 12v 2A adapter for $23.98. but for the same price should I get this 3A version just to be safe?

    and I'm also thinking about this enclosure, as its got a clear top for the light sensor, and its got a seal for weatherproofing

  6. #16
    . Spawn-Inc's Avatar
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    Default Re: electronics help

    relay says it will handle 10amp, but either way your well under 5amps.

    i would opt for the 3amp power supply just to be safe.

    i would also get a box large enough to put the whole adaptor into it.
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  7. #17
    AARGH dr.walrus's Avatar
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    Default Re: electronics help

    I just got gifted a few 10A supplies if you need one. UK plug I'm afraid.

  8. #18
    Fox Furry crenn's Avatar
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    Default Re: electronics help

    Quote Originally Posted by SXRguyinMA View Post
    yep you did. but with the way the board layout is, its got the positive (COM) lead traced on the board all the way to the other side (input) of the relay, So i figured the +12v went through that trace to provide 12v @ the COM side of the terminal block
    COM doesn't mean positive, COM means common. It's easy to see how you got confused though, but the COM is connected to the internal 'hammer' of the relay.
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  9. #19
    Resident 100HP water-cannon operator SXRguyinMA's Avatar
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    Default Re: electronics help

    Quote Originally Posted by Spawn-Inc View Post
    relay says it will handle 10amp, but either way your well under 5amps.

    i would opt for the 3amp power supply just to be safe.

    i would also get a box large enough to put the whole adaptor into it.
    Thats a good idea about having a large enough box, I'd just be worried about the length of the 110v cord. I was planning on plugging it into the garage, then sniping the barrel plug off the end and extending the wiring as needed

    Quote Originally Posted by dr.walrus View Post
    I just got gifted a few 10A supplies if you need one. UK plug I'm afraid.
    Thanks for the offer, but the UK plug wouldnt do my any good lol

    Quote Originally Posted by crenn View Post
    COM doesn't mean positive, COM means common. It's easy to see how you got confused though, but the COM is connected to the internal 'hammer' of the relay.
    yea I knew the COM was common, but the illustration showed it as the positive. The COM being connected to the relay is what got me thinking it was powered

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