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Expand file tree Collapse file tree Original file line number Diff line number Diff line change @@ -3,7 +3,7 @@ Controlling hobby servo motors
33
44There are 4 dedicated connection points on the pyboard for connecting up
55hobby servo motors (see eg
6- [ Wikipedia]( http://en.wikipedia.org/wiki/Servo_%28radio_control%29) ).
6+ ` Wikipedia < http://en.wikipedia.org/wiki/Servo_%28radio_control%29 >`__ ).
77These motors have 3 wires: ground, power and signal. On the pyboard you
88can connect them in the bottom right corner, with the signal pin on the
99far right. Pins X1, X2, X3 and X4 are the 4 dedicated servo signal pins.
Original file line number Diff line number Diff line change 1+ .. _pyboard_tutorial_switch :
2+
13The Switch, callbacks and interrupts
24====================================
35
Original file line number Diff line number Diff line change @@ -50,8 +50,8 @@ Timer callbacks
5050---------------
5151
5252The next thing we can do is register a callback function for the timer to
53- execute when it triggers (see the [ switch tutorial](tut-switch) for an
54- introduction to callback functions)::
53+ execute when it triggers (see the :ref: ` switch tutorial < pyboard_tutorial_switch >`
54+ for an introduction to callback functions)::
5555
5656 >>> tim.callback(lambda t:pyb.LED(1).toggle())
5757
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