M
O
WAY
Title
: mOway Beginner Manual
Rev
: v2.1.3 – March 2011
Page
15
of
65
www.moway-robot.com
Image 12. RF modules into expansion connector.
3.3.5.
Temperature sensor
mOway has installed as a temperature measurer an NTC thermistor from Murata,
a semiconductor whose electrical variable resistance decreases as temperature increases.
The sensor is located in the front part of the robot, very close to obstacle sensor.
The thermistor is connected to the analog port of the microcontroller so that with a
simple reading of the ADC it is possible to get the temperature value in that moment
and notice any change in it since the last reading
4
.
3.3.6.
Speaker
The CMT-1102 speaker from CUI INC directly connected to the microcontroller,
is capable to play tones from 250 Hz to 65 KHz.
3.3.7.
Microphone
The CMC-5042PF-AC microphone from CUI INC enables the robot to detect
sounds from 100 Hz to 20 KHz.
The output is directly connect to an analog input of the microcontroller so that it is
capable to detect not only if there is sound or not (digital mode) but also the intensity of
the sound with a simple reading of the ADC (analog mode).
4
Temperature measured by the sensor can be 5ºC higher than external temperature.