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| 16F819 Audio Spectrum Analyzer |
This is the new version of my previous spectrum analyzer. Used PIC16F819 microcontroller and BA3834 Band-pass filter for spectrum analyzer. It has two versions, BA3834S and BA3834F. Here i used BA3834S. BA3834 are 7-band, band-pass filter ICs that use microprocessor time division to produce serial output for spectrum analyzer displays. To minimize the number of attached components required and enable compact and reliable designs, all of the capacitors for the filters are on the chip. So we can build spectrum analyzer easily
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| Analizer circuit |
This circuit included 11 modes (9 patterns, off and random) and it shows which pattern currently running at start-up (S1, S2, etc.). In off mode it shows S0 on display and S+ for random mode. The pattern mode saved to Eeprom to run at next power up. In random mode it changes its pattern in every 3.5 minutes.
PCB, Circuit, and hex available in below
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