(electronics)

I am trying to build something (takes me up to 4-5 hours to fall asleep, but only if ikeep myself occupied with stuff not work related)/...and for this ..something... i need to map a large frequency range, as large as possible, lets say from  x up to 3Ghz, ad translate it into frequency in audible range. I am interested to group together the waves. sample it, idk how its called,,,you tell me.

 

In the end i want to be able to output the result and hear the pulses and whatever noise i get from condensing the high frequencies into lower frequencies. Accuracy is not imporant, and i am aware most of the data will be lost, its natural, you convert from a lot to just a few.

 

An electric or even a logic (programming) method might work, i am coding an arduino to do that, so either i need a module that i hav no clue how it should be named, or i do it from soft, and i cant image how exactly.....I pefere a module

 

A simpler example, to convert ultrasounds into audible sounds (i just need a lot higer frequency, but same concept like for this) Anyone any ideea?

 

Thnx

Well, there's resampling, but that typically is used to refer to adjusting the bitrate of the audio. Only other thing I can think of is a frequency modulator? No idea if that's what you're actually looking for though.

look at

 

http://en.wikipedia.org/wiki/Intermediate_frequency

 

Heterodyning principle

make an "sin"  (pure single frequency not square or other shape) oscillator at a frequency yu chose


and an cirquit tha multifly that with you other sigal (an nonlinear thing like diode circuit or something more sofisticate)

the result is  2  banswith of frequencies :signal frequencies  + oscillator frequency
and bandwith of frequensy : signal frequencies - oscillator frequency

now make an low filter or an band filter to take only the part you want of bandwith frequwncy: signal frequencies - oscillator frequency
 

Edited March 14, 201511 yr by Tom Pouce

damn i thought it will be a lot more simple.

 

thank you anyway

A resistor? 

http://www.ehow.com/how_6134042_reduce-frequency-simple-circuit.html