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  1. 15-08-2015 #16
    HankMcSpank's Avatar
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    HankMcSpank
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    Quote Originally Posted by Clive S View Post
    Boyan Can you show just how you are connecting the relay to the board you might have to connect the -ve grounds to each other.
    He will definitely need to connect the two boards PSU 0V rails together, else all he'll have is two independent supplies with their respective 0Vs floating wrt one another. As mentioned in my last post, my relay board uses a FET/tranny on the input ...the switching/control voltage does not drive the relay coil direct. Therefore if your board is like mine, the notion that the "Pokeys57CNC does not output enough current on output 5v pins to switch a external relay" a misnomer (the input impedance of the relay board will likely be extremely high so will sink very little current at all)
    Last edited by HankMcSpank; 15-08-2015 at 02:57 PM.
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