Ryutaro Minesawa

I need to make a spectrum analiser from the bar-graph LED's I've included the datasheet, I'm alright at using arduino, I want the left side to be low frequency 32hz and the to the right 16000hz. I need the decibels to contol the hight that the LED bar thats lit I am aware that there is a pdf from june 1978 that explains how to make one but its 10 x 10 and I want to have a considerable amount more pdf included and it starts on page 27.

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