7 band compact audio sprectrum analyzer based on msgeq7 and msp430 mcu.
msp430 value line 20 pin w/ adc10 can be used, I used msp430g2452
Direct drive 7 x 12 led array w/ multiplexing row and columns and polarity
Compensation for 'noise floor' of circuit built via a pre-fixed table array
Logarithm mapping of adc values to volume unit dot levels
Choice of one-dot, two-dot and bar type of display (decide at build time)
Peak dot indicator avaliable (decide at build time)