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Thread: Relay switchable USB hub?

  1. #21
    Maximum Bitrate JimmyFitz's Avatar
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    Quote Originally Posted by BAC5point2 View Post
    Actually, I don't need a 4PDT, so how about these:

    http://www.newark.com/35K3220/electr...HRACK-PT370012

    and

    http://www.newark.com/46F3616/electr...UMFIELD-27E893

    I have a question about the orientation of the pins though.

    I found this

    http://relays.tycoelectronics.com/datasheets/PT.pdf

    For the 3PDT relay.

    Can I assume that pins (13) and (14) are used for the coil, and that I'd wire the USB pins from the head unit to (4), (5), and (6), and then wire the thumb-drive input to (1), (2), and (3) and the iPod input to (7), (8), and (9)? I've never used a dual-throw relay before, only SPST's.

    Thanks!
    Pinout for the first relay part #; Your commons are on 7,8,9. Those go to the head unit. Normally Closed are 1-3, that goes to the default device. Normally open is 4-6, and they go to the alternate device. 13-14 are the coil.
    ~Jimmy

  2. #22
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    Awesome, thank you!

    Do you know of a better socket than the screw-type? I'd just want something that has leads I can just insert and wire from. That would take up MUCH less space and my whole project would actually fit in a small project box.

  3. #23
    Maximum Bitrate JimmyFitz's Avatar
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    Quote Originally Posted by BAC5point2 View Post
    Awesome, thank you!

    Do you know of a better socket than the screw-type? I'd just want something that has leads I can just insert and wire from. That would take up MUCH less space and my whole project would actually fit in a small project box.
    Just solder the wires on to the relay. Sockets are convenient when putting things together. You don't really need the socket.
    ~Jimmy

  4. #24
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    I was just thinking for convenience of servicing. The relay won't be taxed too hard, or switched too much, so it'll probably be just fine.

  5. #25
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    OK, I ordered the relay. $4.24 shipped. I got the Tyco 3PDT one I posted above. I'll just solder right to it. I'll maintain additional length on the USB cables in case I need to replace the relay.

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