Programmable Audio Switch
| Electronics Forum |
 Help
 Search
 Members
 Calendar
|
| Welcome Guest ( Log In | Register ) | Resend Validation Email |
Electronics Forum -> Your Favorite Home Made Projects -> Your Electronic Designs and Home Made Gadgets   |
Programmable Audio Switch| mitro |
Posted: September 07, 2011 02:43 pm
 
|
|
Newbie  Group: Members+ Posts: 2 Member No.: 35,684 Joined: September 04, 2011  |
It's ages since I've made any electronic gadgets, so I would really appreciate any help that anyone can offer. What I would like to make is a sound activated switch to operate a mains circuit which will only respond to the sounds that I programme into it. There seem to be any number of simple switches advertised to respond to 'claps' but nothing more sophisticated. I would also like to incorporate a multi directional, sensitive sensor. If ayone knows of something which already exists, perhaps you'd let me know. Otherwise, any help gladly received.
|
 
|
| GPG |
Posted: September 08, 2011 01:32 am
|
 Forum Addict ++ Group: Spamminator Taskforce Posts: 6,166 Member No.: 792 Joined: April 25, 2004 |
What sort of sounds? Google fast fourier transform. Then google fast fourier transform microcontroller.
|
|
|
| mitro |
Posted: September 08, 2011 08:09 am
|
|
Newbie Group: Members+ Posts: 2 Member No.: 35,684 Joined: September 04, 2011 |
Thanks for the suggestions. That will certainly give me something to get my head around.
Specifically, I would like to design a switch which will respond to the sound of an incoming helicopter. As I said, it would be fun to be able to programme it to any sound, but at the moment helicopters are what I'm interested in. |
|
|
| CWB |
Posted: September 08, 2011 08:21 am
|
 Forum Addict ++ Group: Spamminator Taskforce Posts: 19,523 Member No.: 15,154 Joined: May 15, 2008 |
template comparison/analysis is going to be needed .
-------------------- "Know how to solve every problem that has been solved"
R. Feynman '88 |
|
|
| GPG |
Posted: September 08, 2011 06:12 pm
|
||
|
Forum Addict ++ Group: Spamminator Taskforce Posts: 6,166 Member No.: 792 Joined: April 25, 2004 |
IME helicopters have a charateristic sound that varies with make/model, so _theoretically_ a FFT should be able to tell you this. As long as you have a chacteristic model to compare it to. ^CWB. Starting to sound like a software problem.
|
||
|
|
| MacFromOK |
Posted: September 09, 2011 01:54 am
|
||
 Forum Addict ++ Group: Spamminator Taskforce Posts: 12,956 Member No.: 5,314 Joined: June 04, 2006 |
Are the chopper(s) loud enough (above ambient noise at the LZ) to use a simple audio volume-level trigger? Or... would rotor frequency range be narrow enough for something like a simple tone decoder? Or perhaps combine the two for greater accuracy. Just a thought.  -------------------- Mac *
"Basic research is what I'm doing when I don't know what I'm doing." [Wernher Von Braun] * is not responsible for errors, consequential damage, or... anything. |
||
|
|
| CWB |
Posted: September 09, 2011 11:24 pm
|
|
Forum Addict ++ Group: Spamminator Taskforce Posts: 19,523 Member No.: 15,154 Joined: May 15, 2008 |
a minigun (ie : puff) has a very distinctive sound template .
this is the one i would want to know about .  -------------------- "Know how to solve every problem that has been solved"
R. Feynman '88 |
|
|
| johndev |
Posted: January 16, 2012 10:46 pm
|
||
|
Newbie Group: Members+ Posts: 13 Member No.: 36,384 Joined: January 16, 2012 |
I think so |
||
|
|
0 User(s) are reading this topic (0 Guests and 0 Anonymous Users)
0 Members:
 |
|
:: support us ::
ElectronicsSkin by DutchDork & The-Force
Powered by Invision Power Board(U) v1.3.1 Final © 2003 IPS, Inc.