III-12
[ 2 ] Ambient temperature sensor circuit
This circuit is composed of resistors R12 and a thermistor TH2. It converts the resistance of the
TH2 (whose internal resistance varies depending upon the ambient temperature) to the voltage
variation, and then feeds its output to the A/D input port PA0 on the CPU. According to the
Ambient temperature data, the CPU determines the optimum head drive power.
Fig. 3.2-16 Ambient Temperature Sensor Circuit
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