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51 Ultrasonic Rangefinder Design-LLCD1602-KEY-Ultrasonic
This design is composed of STC89C52 single-chip circuit + LCD1602 liquid crystal display circuit + ultrasonic module detection circuit + buzzer alarm circuit + button circuit + power supply circuit.
1. LCD1602 displays the distance in real time.
2. The distance threshold can be set by pressing the button. If the current distance exceeds the threshold, the buzzer will alarm; otherwise, the buzzer will not alarm.
