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Old 1st June 2006, 06:02 PM   #1
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Default frecuency level display

is there somebody who knows a way to make a frecuency level display?somebody to tell me a site to help me fo this?i have find a circuit with leds but i want to make a lot of levels to display all frecuency from 20hz to 20khz.
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Old 1st June 2006, 10:43 PM   #2
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do you want to display the frequency or the voltage at specific frequencies ???
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Old 1st June 2006, 11:59 PM   #3
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I think you would build a VU meter, (look up a LM3915 IC) and just use a active bandpass in say 15 sets. Similar to an equalizer.
I'm not sure if there is an easier way.
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Old 2nd June 2006, 01:33 AM   #4
Ron E is offline Ron E  United States
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What you really want is an FFT analyser. Use your computer monitor and write or buy a computer program.....
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