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PCB: Distance Measurement using Ultrasonic Waves

PCB: Distance Measurement using Ultrasonic Waves
PCB: Distance Measurement using Ultrasonic Waves back view
SKU SKU17763  
Weight 25.00 grams
 
Our price: Rs70.00 ($1.46)
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info icon This listing is for Bare PCB Only, you have to purchase and solder all components your self.

This MINI AVR Project demonstrate how the distance to an obstacle can be measured using ultrasonic waves. It makes use of techniques to precisely measure the time it takes for the sound wave (in ultrasonic wavelength) to reach the obstacle and then bounce and come back to the receiver. After the time measurement is complete, a small calculation is done to get the distance of obstacle from the sensor.

To show the calculated distance, a 16x2 Alphanumeric LCD Module is used. The main microcontroller used is ATmega8.

Assembly Guide Video

LCD Interface

LCD can be easily connect on the 16 pin female connecter provided on the board.

NOTE: If no text is visible on LCD then adjust the LCD Contrast Adj. preset with the help of a screwdriver.

Parts of the board

The images below shows the main parts of the board.

parts of board
Fig. Parts of the board

Usage

  • Install the sensor (HC-SR04) as shown on the image below. NOTE: Sensor is included in the package.
  • Power up the board using a 12V 1 A Adapter (NOT included with package!)
  • Switch on the board.
  • Now you can bring any obstacle in front of the sensor, its distance in CM will be shown on the LCD.
Installing HC-SR04
Fig. Installing the sensor

 

HC-SR04 ATmega8 Demo
Fig. HC-SR04 ATmega8 Interface Demo

Schematic

schematic hc-sr04 atmega8
Fig. HC-SR04 ATmega8 Interface Demo

Bill of Materials

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
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