Signal amplification type automatic irrigation control system based on protective circuit
A protection circuit, automatic irrigation technology, applied in pump control, protection against overvoltage, machine/engine, etc. Effect
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[0020] Such as figure 1 As shown, the present invention is mainly composed of control chip U3, diode D2, detection probe Q1, detection probe Q2, resistance R2 connected in series between the P poles of detection probe Q1 and diode D2, and connected to the VIN pin of control chip U3 The protection circuit, the resistance R1 connected in series between the detection probe Q1 and the protection circuit, the N pole connected to the detection probe Q1, the diode D1 connected to the P pole with the TON pin of the control chip U3, and the positive pole connected to the TON pin of the control chip U3 The BOOT pin is connected, the capacitor C4 whose negative electrode is connected to the LX pin of the control chip U3, the resistor R3 connected in series between the NC pin and the GND pin of the control chip U3, and the ISEN pin of the control chip U3 connected signal amplifying circuit, a power circuit connected to the N pole of the diode D2, and a switch circuit connected in series b...
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