Dear Valued Customer, ‘Techshop Bangladesh’ will remain closed from 23rd June to 01st July 2017 for the occasion of Eid-Ul-Fitr.You are requested to place your order before 2 pm on June 22, 2017 to get delivery inside Dhaka before the starting of Eid vacation of courier services companies. To get delivery before Eid Outside Dhaka, you must order within 20th June, 2017. We wish Eid brings all the happiness to you and your family, Eid Mubarak.
HCSR04 is an Ultrasonic ranging module which consists of a transmitter,receiver and control circuit. It has four pins for VCC, GND, Trigger and Echo.You can easily interface it with micrcontrollers and Arduino boards.
The basic principle of work is:
(1) Using IO trigger for at least 10us high level signal, (2) The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back. (3) IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time×velocity of sound (340M/S) / 2,
Working Voltage DC 5 V
Working Current 15mA
Working Frequency 40Hz
Max Range 4m
Min Range 2cm
Measuring Angle 15 degree
Trigger Input Signal 10uS TTL pulse
Echo Output Signal Input TTL lever signal and the range in proportion