| 摘要 |
PURPOSE: A lamp-lighting type temperature display apparatus of cooling water is provided to prevent possibility of confusion in an analogue gauge and to remove movement to operate the gauge. CONSTITUTION: A one-chip microcomputer(8), a temperature sensor(9) of cooling water, a preheating lamp(10) and a warning lamp(11) in an instrument cluster are connected to a power switch(7) respectively. An input end(8a) of the one-chip microcomputer is connected to the temperature sensor of cooling water. An output end(8b) is connected to the preheating lamp by series-parallel capacitor, resistance(R1,R2) and a field effect transistor(12). The warning lamp is connected to the output end of the one-chip microcomputer by a series-parallel capacitor, resistance(R3,R4) and a field effect transistor(13).
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