[MinnowBoard] 1.6V output on gpio pin

Trevor Woerner twoerner at gmail.com
Fri Feb 5 23:17:57 UTC 2016


Hi,

WARNING: sw person doing hardware! ;-)

I was playing around with my MinnowMax and Turbot boards and wanted to 
do the hardware "hello world!" involving flashing an LED via a GPIO.

# cd /sys/class/gpio
# echo 338 > export
# cd gpio338
# echo out > direction
# echo 1 > value

At first I didn't think it was working (which is why I tried on both my 
MinnowMax and Turbot boards). When I double-checked with my DMM I 
noticed that it was working, but the voltage was really low, roughly 1.6V.

Is there something I'm doing wrong that I'm not getting 3.3V (or 5V)?

Best regards,
     Trevor


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