On Tue, Aug 23, 2016 at 5:18 AM, <niv...@gmail.com> wrote: When I got my new bbgw I ran an internet search to find how to use the > relay and did not find an easy answer, so here goes: > 1. The Grove - SPDT Relay(30A) - uses +5V , so you need to solder the > third pin of that groove connector. Disconnect it from the board, and > connect it to the input 5v power. >
It seems that your relay requires nominal 5V coil voltage and 185mA coil current. This is far beyond what a BBB pin can provide: they put out 3.3V and barely above 10mA. Additionally, switching the coil on and off generates inductive spikes that are likely to damage the BBB output circuits. You need some sort of coil driver; I suggest buying something, e.g one of http://blog.machinekit.io/p/hardware-capes.html, or building your own circuit like this one http://i.stack.imgur.com/OhY9d.png -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAC%3D1GgFMYszu7ETm7KWi6UvcvzRZFXE5Z2dsy3Bt2wf2tB2ROA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
