NTC temperature detection circuit
The utility model discloses an NTC temperature detection circuit comprising an MCU, a temperature control resistor RT1, a resistor R1 and a capacitor C1. IO pins IO1 and IO2 of the MCU are respectively connected with one end of a temperature control resistor RT1 and one end of a resistor R1, and the...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses an NTC temperature detection circuit comprising an MCU, a temperature control resistor RT1, a resistor R1 and a capacitor C1. IO pins IO1 and IO2 of the MCU are respectively connected with one end of a temperature control resistor RT1 and one end of a resistor R1, and the other end of the temperature control resistor RT1 and the other end of the resistor R1 are connected with a capacitor C1 and then are grounded; the capacitor C1 is charged through the resistor R1 and the temperature control resistor RT1 respectively, the time of two times of charging is recorded, and the resistance value of the temperature control resistor RT1 can be deduced according to the resistance value of the resistor R1 by comparing the time of two times of charging, so that the temperature of the temperature control resistor RT1 is obtained.
本实用新型公开一种NTC温度检测电路，包括MCU、温控电阻RT1、电阻R1以及电容C1；MCU的IO管脚IO1和IO2分别与温控电阻RT1和电阻R1一端连接，温控电阻RT1和电阻R1另一端与电容C1连接后接地；通过电阻R1和温控电阻RT1分别给电容C1充电，并记录下两次充电的时间，通过比较两次充电时间即可根据电阻R1的阻值推断出温控 |
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