Sense and contr
Sense and control f
ol featur
eatures
es
The //control.Node outputs are controlled with blocks provided in the
Code tool in SPARKvue or PASCO Capstone. Sensors can be used to
control devices connected to the outputs using the value of
value of block in
the Code tool. After opening the Code tool
, select the Hardware
Hardware
category to access the blocks.
1. Accelerometer
Accelerometer
Use the accelerometer to measure acceleration along three axes.
The label indicates the location of the accelerometer on the
//control.Node and the positive direction of each axis.
+x
+z
+y
When motionless, the accelerometer me9.8 m/s
2
when
pointing
away from the ground and −9.8 m/s
2
when pointing
towards the ground. This is useful for determining the
//control.Node's orientation. For example, if the y-axis is pointing
away from the ground, the Acceleration - y
Acceleration - y measurement reads
9.8 m/s
2
and the other axes measure 0.
2. Speaker
Speaker
Use the speaker to output a sound at a specified frequency.
Control the speaker frequency with the set frequency
set frequency block.
3. Sensor port
Sensor port
Use this port to connect sensors including the Greenhouse
Sensor (PS-3222), Line Follower (PS-3320), or Range Finder
(PS-3321).
4. Power Out ports
Power Out ports
Use these ports to connect a High Speed Stepper Motor
(PS-2976), Low Speed Stepper Motor (PS-2978), Power Output
Board (PS-3324), or Grow Light (PS-3347). Control each accessory
with a block designed specifically for the accessory.
5. Servo ports
Servo ports
Use these ports to connect a Servo Motor (SE-2975), Continuous
Rotation Servo (SE-2977), or other third-party servos. Control
servos with the set servo
set servo block.
Important:
Important: The servos must connect with the black wire on
the
right side, as indicated by the dark dot on the label.
The //control.Node On-board Sensor can measure the servo
current. You can use this measurement to detect a resisting force
when the servo is trying to maintain a specified position. The
Servo Current
Servo Current increases in response to resisting the force.
2 | //control.Node
