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In order to prevent the man-made destruction of communication lines and the electromagnetic actuator from burning the coil due to the excessive current flowing through the electromagnetic coil for some reason, this paper uses the current monitoring technology in the design of intelligent Combination lock. The current monitor adopts the current/voltage conversion chip MAX471 produced by MAXIM company. This chip can convert the measured current I into an output voltage U to the ground, and has the characteristics of large measurement range, high accuracy, and proportional output voltage U to the measured current I. The output voltage of the current monitor is sent to the A/D converter, and the microcontroller reads the A/D conversion results to understand the changes in current in the circuit. Through analysis, abnormalities are detected in a timely manner and an alarm signal is issued.
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.