On Thursday 14 May 2020 20:30:58 Dan Henderson wrote: > Hello everyone, I have a simple question for you. I’m testing the > ability to trip a simple 5v relay with an output pin from a 5 axis BOB > and don’t seem to be having any luck. I have motion-spindle-reverse > mapped to the output pin (04). Was expecting an M4 to go high on the > mapped pin and trigger the external relay. I have 5v+, 5v-, and pin 4 > wired to the relay input side. What have I done wrong here?
Draw us a back of the envelope schematic. scan & post it. As a retired CET I can read that easier than this text. But bear in mind the logic output available is going to be quite a ways from enough current to reliably operate most 5 volt relays as they generally take more current than is available from a straight logic output to operate them. Most BoB's that have a relay, will also have the booster circuitry to operate that relay, but that might not be wired to pin4. So show us a schematic plz. > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
