The hc-sr04 ultrasonic sensor are not exist on proteus. If you download this library you can use hc-sr04 ultrasonic sensor on the proteus with arduino and others. Download this library from below. Read first for using the library: 1) Copy and Paste the files: ARDUINO.IDX and ARDUINO.LIB in… C:\Program Files\Labcenter Electronics\Proteus …
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