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  • 5 Rin Relays

    Can I control a 5 pin relay with a fusion brain? I am considering doing the Honda ELD bypass mod ( http://forum.sounddomain.com/ubbthre...page/0/fpart/3 half way down page). If I can use that type of relay, will try and figure out how to code it automated. Thanks.

  • #2
    A 5pin relay is NO-COM-NC and 2 coils. That is a standard relay, exactly what the FB is designed for.
    Fusion Brain Version 6 Released!
    1.9in x 2.9in -- 47mm x 73mm
    30 Digital Outputs -- Directly drive a relay
    15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
    Buy now in the MP3Car.com Store

    Comment


    • #3
      "two coils" meaning 2 terminals for the coil.
      We know what the Toaster meant.


      Does the FB require spike protection? I'd assume so - ie, the diode across the coil - Anode (non-lined) end to coil GND, Cathode to coil+.

      Comment


      • #4
        Originally posted by OldSpark View Post
        "two coils" meaning 2 terminals for the coil.
        We know what the Toaster meant.
        Correct, I should have been more explicit.

        Originally posted by OldSpark View Post
        Does the FB require spike protection? I'd assume so - ie, the diode across the coil - Anode (non-lined) end to coil GND, Cathode to coil+.
        Legal mumbo jumbo from me as Fusion Control Centre: Yes

        Me as me: Not always.

        The relays I sell specifically for the FB, have no protection diode. But they are also low current and made to minimize spiking on coil release. If you use a standard beefy automotive relay or just whatever you have lying around, I do recommend a supression diode. The Mega and Mini Relay boards have diodes just because it is on a board, and might as well. The FB's FETs are rated to handle high voltage spikes for limited times, so it all works without suppression diodes for what I sell (FB + FB Relays). When you DIY, your FB's life is in your own hands.
        Fusion Brain Version 6 Released!
        1.9in x 2.9in -- 47mm x 73mm
        30 Digital Outputs -- Directly drive a relay
        15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
        Buy now in the MP3Car.com Store

        Comment


        • #5
          That's the beauty of the FB - just buy the RB relay boards. (And sue the designer if they blow ha ha.)

          Maybe the FB uses a line drivers (like the ULN2003?? - essentially transistor buffers) that some use. They tend to be quite robust.


          I'd say if ever in doubt. add the diode. A mere 20c IN4004 or iN4007 etc could prevent the rear ends of uPC and digital things from blowing. (Relay coils can induce up a a -200V spike, typically 50V-100V are common. Digital circuit typically only tolerate -0.3V to -0.6V.)
          But to that I say add it yourself - I don't like relays with inbuilt diodes, I prefer to add my own externally (to the relay base) - in part just in case I was 85 as more +ve then 86. (By convention, relay coils are 86 = +ve, 85 = -ve, hence the diode line end (Cathode) towards 86 +ve).



          I just didn't want to see a Fusion Brain get fused.

          Comment


          • #6
            Each output pin goes through 2 large NPN transistors in a darlington formation between the MCU and the relay coil. You will blow an output driver before harming the MCU, which is a good thing. The older versions went through shared darlingtons. So if you blew it, you might blow 8 channels at a time.
            Fusion Brain Version 6 Released!
            1.9in x 2.9in -- 47mm x 73mm
            30 Digital Outputs -- Directly drive a relay
            15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
            Buy now in the MP3Car.com Store

            Comment

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