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This project uses an HC-SR04 ultrasonic sensor to measure how close an object is. A buzzer and LED react depending on the distance, similar to a car parking sensor. < 10 cm → buzzer and LED stay on.
The flashing is thanks to LEDs with a built-in, integrated flashing circuit and the nasty noise comes from a piezoelectric buzzer — both are available from electronics stores that sell ordinary LEDs.
بعض نتائج کو اس وجہ سے چھپا دیا گیا ہے کیونکہ ممکن ہے آپ کو ان تک رسائی حاصل نہ ہو۔
ناقابل رسائی نتائج دکھائیں۔