Electronic Projects, forums and more.

Go Back   Electronic Circuits Projects Diagrams Free > Electronics Forums > Electronic Projects Design/Ideas/Reviews


Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution.

Reply
 
Tools
Old 10th November 2008, 02:27 PM   #1
Default Frequency Detector Circuit

For anyone who might be interested in the sort of thing:

Frequency Detector « Broken Remote

I wish I had the original schematic that I used to create this. Enjoy!
bacterozoid is offline  
Old 11th November 2008, 07:29 AM   #2
Default

thinks freind
oil8080 is offline  
Old 19th February 2009, 12:15 AM   #3
Default

Hi,
Thanks for the link. I currently doing the project that detect the presence of electromagnetic waves which i think similar to frequency detection, since electromagnetic waves also have property of frequency. Am I right? For the frequency detector circuit provide by the link posted by bacterozoid..instead of audio input, can the circuit accepts radio frequency or electromagnetic waves as the input? if cannot, can anyone suggest some modification that i need to do on the circuit?
On the butterworth filter part, it is low frequency butterworth filter with cut off frequency of 400Hz right?It means, the filter will suppress other harmonics greater than 400Hz frequency..Am I right?If let say, I want to make my frequency detector circuit that have cut off frequency larger than 400Hz, I just need to calculate the new value of resistor and capacitor on the butterworth filter part. Is it? If I modify the butterworth filter part, is it necessary for me to modify the circuit at gain, envelope or comparator part?
Or I just can used the original one, just a modification on butterworth filter part?
Thanks for any idea and help.
Really appreciate it
xda_xdi is offline  
Old 19th February 2009, 12:25 AM   #4
Default

My circuit is designed for frequencies in the audible range (under 2KHz). I doubt if you can use it for electromagnetic waves. Those are much higher in frequency - you would have to hook an antenna up to the input and even then I don't really think it would work...

I'm not really any sort of expert on that.

I don't recall exactly about that filter - what you said sounds about right. If this circuit would work for what you want, that filter needs to cut off at much higher frequencies. The reason for the butterworth filter is to knock out harmonics in the audio input. I don't know if that does any good for a wave though.

You probably want to create a new topic if you're looking to detect electromagnetic waves. I'm sure there are better ways of doing such a thing

Good luck!
bacterozoid is offline  
Reply

Tags
circuit, detector, frequency

Thread Tools
Display Modes


Similar
Title Starter Forum Replies Latest
cellphone detector circuit colmcuddy Electronic Projects Design/Ideas/Reviews 6 16th July 2008 01:25 PM
Need Metal detector circuit. makehand Electronic Projects Design/Ideas/Reviews 11 27th May 2008 04:21 PM
Frequency detector ariakovo General Electronics Chat 23 4th January 2008 03:28 PM
Infrared detector circuit George L. General Electronics Chat 4 29th May 2005 02:41 AM
laser/detector circuit Markos Electronic Projects Design/Ideas/Reviews 11 22nd November 2004 12:54 AM



All times are GMT. The time now is 12:43 AM.


Electronic Circuits  |  Learning Electronics
eXTReMe Tracker