Protection circuit for detecting source power supply voltages through single-chip microcomputer, and control method
A single-chip microcomputer control and protection circuit technology, applied in the field of electronic information, can solve the problems of complex circuits, unsatisfactory, and increased costs, and achieve the effects of saving components, improving intelligence, and improving production efficiency
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[0015] The present invention will be further described in detail below in conjunction with the drawings.
[0016] See figure 1 , The present invention provides a protection circuit and control method for single-chip microcomputer to detect power supply voltage. The protection circuit is composed of a voltage sampling circuit 1 and a single-chip control circuit 2.
[0017] Preferably, the voltage sampling circuit consists of a resistor R 1 , Resistance R 2 , Resistance R 3 , Capacitance C 1 And diode ZD 1 composition.
[0018] Resistance R 1 One end is connected to the voltage input end, and the other end is simultaneously connected to the resistance R 2 And diode ZD 1 Connected.
[0019] Resistance R 2 The other end is at the same time with resistance R 3 And capacitance C 1 Connect and connect the output terminal of the voltage sampling circuit.
[0020] Resistance R 3 And capacitance C 1 Connect in parallel.
[0021] Resistance R 3 And capacitance C 1 The other end is at the same tim...
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