> > As Wulf man said: Which relay driver are you using? > What happens if you detach the relay driver and sense the outputs directly with a multimeter? Most GPIO are capable of currents between 4mA and 8mA (see buffer strength table 4.1. am3352.pdf). <http://www.ti.com/lit/ds/symlink/am3352.pdf> Drawing more current can kill the µC !!
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