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Old 2nd June 2006, 03:24 PM   #1
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Join Date: May 2006
Default frecuency level display

i want to display all the level of all the frecuences with leds.something like the display at a car stereo.can i find a chip to do this?
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Old 10th June 2006, 02:54 AM   #2
dangus is offline dangus  Canada
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Location: Vancouver Island
Rohm had some chips that did this, although I think only over a limited number of frequency bands.
Vellemann probably has a kit, and surely Elektor or ELV has published plans for such a thing at some time. There were plans in an old Popular Electronics magazine from about 1977 that used quad opamps and multiplexed bar graph drivers to do a 10 band RTA.
It should be possible to do this in software with a PIC or Atmel microcontroller driving the display.
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Old 10th June 2006, 04:41 PM   #3
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