Data Sheet

64 : circuit 3b
SERVO MOTORS
TROUBLESHOOTING
The RGB LED colors aren’t
working or a color is missing
Check the connection for the wire and resistor
connected to each leg of the LED. Ensure the RGB LED is
inserted in the correct orientation.
The distance sensor doesn’t
seem to work
Open up the Serial Monitor on your computer. You
should see a stream of distances being printed in the
monitor. If they are all reading 0 or jumping around,
then check the wiring on your sensor.
The distance sensor still
doesn’t work
Ultrasonic noise pollution will interfere with your
distance sensor readings. If you aim two distance
sensors at each other, they will confuse each other.
Some air-conditioning systems may also emit noises
in the ultrasonic range. Try pointing your sensor
away from the other distance sensors or changing to a
different location.
A B
DISTANCE SENSOR
MOTION ALARM
You’ve completed
Circuit 3B!
Continue to circuit 3C to explore building mechanisms that interact with your circuits.
C