Comments on: Interfacing Ultrasonic Rangefinder with AVR MCUs – AVR Tutorial

By: tania

tania — Sun, 14 Apr 2013 18:40:30 +0000

hello avinash sir.. this code is for ultrasonic serial out sensor for distance measurement . can u send me assembly code for ultrasonic serial out distance measurement sensor which is interface with atmega8515. working on avr studio4?? please send me code … i am very thankful to u…..

By: r-giga

r-giga — Thu, 17 Jan 2013 18:42:57 +0000

thanks because of your kindness.

By: Avinash

Avinash — Thu, 13 Dec 2012 05:03:09 +0000

If you use a number of uSonic Sensors, fire each one by one so that they don’t interfere with each others.

Max range is 4m only

Timer period for delivery anywhere in India is 3-5 days.

Only the above code is available. No Bascom code available.

By: Gaurav Shukla

Gaurav Shukla — Wed, 12 Dec 2012 10:34:00 +0000

Hello sir,

I want to use number of ultrasonic sensors at a time for distance measuring so did they effect each other?

As I want high range distance sensors with good maximum(10 m) as well as minimum range(5 cm) so which sensor I should prefer and do u have that type of sensors?

Does ultrasonic sensors can get distraction from other sources?

What will be the time period of delivery if I order 10 to 15 sensors at a time?

I want code for atmega16 in bascom AVR language for that sensor can you provide me that with product?

By: Ted

Ted — Fri, 30 Nov 2012 12:28:17 +0000

It works.. Just change getPulseWidth to read from echo pin and dont set Trig as input in the while loop. DONE!

By: Ted

Ted — Fri, 30 Nov 2012 11:46:47 +0000

Hello. im trying to get this work also. The example uses the same pin as read/write so shouldnt be too hard to do.

By: Avinash

Avinash — Sun, 07 Oct 2012 14:37:50 +0000

@Brendon
Thanks !

By: Brendon

Brendon — Sun, 07 Oct 2012 12:42:34 +0000

“I don’t know why I will write code for you If I can have a nap in that time!” – Best reply ever!!

Great tutorials keep up the good work.

By: maeer_amit

maeer_amit — Sun, 23 Sep 2012 16:35:25 +0000

Hello Mr Uttam Dutta,
I would like to know the details of your project on”relay driver that turns on the relay when an object comes nearer than predefined distance. The output is then used to play a audio warning”. I would be highly obliged if you could mail me detailed description of your project along with the schematics on a2mit7@gmail.com..
Thank you

By: Ravindra

Ravindra — Mon, 06 Aug 2012 05:25:07 +0000

@Rakib

no….!!!!!!!

By: Ravindra

Ravindra — Fri, 03 Aug 2012 11:13:29 +0000

“”Distance (cm) = pulsewidth/58.”"
“”Distance (inches) = pulsewidth/148.”"

Is this formula only for AVR or PIC.?????

And just want to know how this formula came..!!!!

why 58 ro 148 numbers are there in the formula..????

By: An Inexpensive Robot Platform « Pointers Gone Wild

An Inexpensive Robot Platform « Pointers Gone Wild — Fri, 22 Jun 2012 02:31:51 +0000

[...] and RX UART ports and creates a serial connection I can interact with using a terminal program. The ultrasonic distance sensors send ultrasonic pulses on command and will keep a digital value high until the echo comes [...]

By: Avinash

Avinash — Sun, 03 Jun 2012 12:24:27 +0000

@Vikas
LOW Fuse = 0xFF
HIGH Fuse = 0xC9

By: vikas patel

vikas patel — Sun, 03 Jun 2012 12:08:18 +0000

hi , i used usbasp programmer purchse from ur store. i used atmega 128 microcontoller with 11.0592 mhz i dont know fuse bit can u help me what is the fuse bit of it ?

By: steve

steve — Sat, 02 Jun 2012 15:29:20 +0000

Nice tutorial. I have an HC SR04 ultrasonic module with 4 pins:
vcc, trig, echo and gnd.
Is there much difference in coding for an HC sr04?

By: Rakib

Rakib — Tue, 29 May 2012 21:12:53 +0000

Can this ultrasonic sensor be used for counting rpm of a turbine(fan)?

By: Ankit Raj

Ankit Raj — Wed, 23 May 2012 01:58:06 +0000

Hello Avinash..

Greetings!!

I have few queries regarding the above circuit.

1. What can be the maximum distance between the sensor and the micro controller board.

2. I came across a sensor (similar to above) which sends data (ASCII values which corresponds to distance in cms ) serially on 9600 baud rate.
The data sent is automatically refreshed after every 500 ms.

Link below.
http://www.rhydolabz.com/documents/sensors/Ultrasonic%20Distance%20Sensor%20Serial%20Output-User%20Manual.pdf

So which sensor should I opt for PWM output or Serial output when i have to keep the distance between sensor and microcontroller board > 30 ft. Which will be more accurate?

Thanks
Ankit Raj.

By: Rohit

Rohit — Tue, 08 May 2012 12:12:57 +0000

Hello Avinash, When are the stocks expected for the ultrasonic range finder module?

By: Rohit

Rohit — Mon, 07 May 2012 13:41:05 +0000

Nice program.

Why have you chosen the magic numbers – 600000 and 60000 in your program?

I guess the first one (600000) is a calculated time out value in for loop but I am unable to get on the other value (60000) which you are checking against TCNT value in your program to detect if TCNT is greater than 60000 then there is no obstacle.
So question is how did you derive the value 60000 – from datasheet of this module or from your own experiments?

By: Ankit Raj

Ankit Raj — Sat, 05 May 2012 15:08:58 +0000

Thanks Avinash!

Probably i will also have to take care about the percentage of reflection/refraction/absorption on the water surface.

I want to buy a UltraSonic Range Finder from your site..but i found that its not in the stock!

Can you give an approximation of its availability?

Thanks!
Ankit Raj