Keyestudio Smart Little Turtle Robot V3 Manual page 87

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Wiring note: the brown line of servo is linked with Gnd(G), the red line is
connected to 5v(V) and orange line is attached to digital 10.
The servo has to be connected to external power due to its high demand
for driving servo current. Generally, the current of development board is
not enough. If without connected power, the development board could be
burnt.
(5) Test Code1：
/*
keyestudio smart turtle robot
lesson 4.1
Servo
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87