Electronics > Electronics

Non-ultrasonic Sonar

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hazzer123:
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.

555 timer chip guy:

--- Quote from: hazzer123 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?


My reason for not using ultra sonic is i have no compatible mic or speaker.

--- End quote ---
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.

Brandon121233:
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.

hazzer123:
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.

Hal9000:
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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