Author Topic: Non-ultrasonic Sonar  (Read 2050 times)

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Offline hazzer123Topic starter

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Non-ultrasonic Sonar
« on: June 01, 2007, 11:52:43 AM »
I want to add sonar to my robot, but i have no cash to buy a module. Plus making my own is much more fun :)

I was wondering, have people made non-ultrasonic sonar for their robots? Is it possible and effective?

What is the best type of mic to plug into a MCU?

My reason for not using ultra sonic is i have no compatible mic or speaker.
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Offline 555 timer chip guy

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Re: Non-ultrasonic Sonar
« Reply #1 on: June 01, 2007, 12:03:03 PM »
I want to add sonar to my robot, but i have no cash to buy a module. Plus making my own is much more fun :)

I was wondering, have people made non-ultrasonic sonar for their robots? Is it possible and effective?


My reason for not using ultra sonic is i have no compatible mic or speaker.
I have made a non ultrasonic range finder and it was ok but it picked up a lot of interference.



and you do not use a mic or speaker you should use ultrasonic transducers.

Offline Brandon121233

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Re: Non-ultrasonic Sonar
« Reply #2 on: June 01, 2007, 12:57:50 PM »
you don't have $25??? Cause thats all they cost, and I guarantee you it would cost 2X that to make one that worked as well.
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Offline hazzer123Topic starter

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Re: Non-ultrasonic Sonar
« Reply #3 on: June 01, 2007, 03:00:25 PM »
Yeh probs. :) I actually do have the money... but i though it might be more of an acheivement to build my own.

Plus id learn loads creating the firmware to handle the creation and detection of the sound.
Imperial College Robotics Society
www.icrobotics.co.uk

Offline Hal9000

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Re: Non-ultrasonic Sonar
« Reply #4 on: June 02, 2007, 07:17:14 AM »
Woah, i wouldn't even have a clue about starting off with this.

The ultrasonic ones are made out of a vibrating crystal of something right? Maybe i'm thinking of oscillators......

However, to make a transducer from scratch sounds very intricate.
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