Đo khoảng cách dung Atmega8 và cảm biến âm thanh. Ultrasonic Rangefinder HC-SR04 Interfacing with ATmega8

* Hình project

* Sơ đồ nguyên lý:

* Danh sách linh kiện:

S. No.	Reference	Value	Part	Qty
1	R1	100 Ohms	Resistor 1/4 watt	1
2	R2	330 Ohms	Resistor 1/4 watt	1
3	R3	4.7K Ohms	Resistor 1/4 watt	1
4	C1	470uF	Electrolytic Capacitor 25V	1
5	C2,C5,C6,C7	0.1uF(100nF)	Ceramic disk type capacitor	4
6	C3,C4	22pF	Ceramic disk type capacitor	2
7	D1	1N4007	Diode	1
8	D2	-	5mm LED - Round - RED	1
9	U1	ATmega8	ATmega8 MCU	1
10	U2	7805	5V Voltage Regulator	1
11	L1	10uH	Inductor	1
12	RV1	10K Ohms	Preset (Variable Resistor)	1
13	SW1	-	On/Off Switch	1
14	X1	-	DC Socket	1
15	X3	16MHz	Crystal	1
16	X4		HC-SR04 Sensor	1
17	-	-	28 PIN IC Socket	1
18	-	-	16 PIN Female Connecter	1
19	-	-	4 PIN Female Connecter	1
20	-	-	16 PIN Male Connecter	1
21	DISP1	-	LCD Module 16x2 GREEN B/L	1

* Tải chương trình (atmel studio 6 project + Hex)

Source: http://extremeelectronics.co.in