trying to get a servo controller from my raspberry pi with a piminori explorer hat and servoblaster. When I use one of the GPIO port which connect to the LEDs and touch with the yellow control wire of the servo the right connector of the LED, everything works fine. When I try to do the same with one of the outputs, I do not succeed.
I do understand that the outputs are only capable of shorting the signal to groun, so I used a 10k pull up resistor. A LED shows me that this seems to work, but my servo does not move.
Here is my setup:
and yes - it seems that the output will be inverted, so in order to use servoblaster, you have to type
cd PiBits/ServoBlaster/user sudo ./servod --p1pins=7,31 --invert echo 1=100 > /dev/servoblaster
pin 7 is the blue LED, pin 31 should be output 1
PS: we have a discussion going on about this problem in the pimoroni forum: http://forums.pimoroni.com/t/trying-to-connect-a-servo-to-explorer-hat/1176