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AN07-00200-03E
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4.1.3
LED displays using temperature sensor operations
This section explains how to display temperature information on the LED using the temperature
sensor, which is mounted to the starter kit. A temperature sensor is a sensor for detecting changes in
temperature. Put simply, it is a thermometer for measuring the temperature. Although there are
various methods of measuring the temperature, the temperature sensor mounted to the starter kit is
called a thermistor. A thermistor is a resistor that uses the temperature characteristics of
semiconductors, and is a temperature sensor in which the resistance value changes according to the
temperature
The circuit surrounding the temperature sensor on the starter kit is shown in “Figure 4-10 peripheral
circuit diagram for temperature sensor”. As explained in the section on the volume switch, with this
circuit also, if the resistance value of the temperature sensor changes, the input voltage of the A/D
converter in the microcontroller changes.
MB95F136JBS
AN07
端子
R=10k
Ω
VCC5
GND
GND
温度センサ
Figure 4-10 peripheral circuit diagram for temperature sensor
Next, about the LED display, is basically the same as turning ON/OFF the LED. Here, The LED is
turned ON in multiple patterns according to the digital values acquired from the temperature sensor.
AN07 pin
Temperature sensor