1. Self-Adjusting Equalizer Scott Lair
Senior Design
Self-Adjusting Equalizer Scott Lair

2. Overall System

3. Summing Amplifiers Stereo to mono converter Sum of bands
High input impedance
Potentiometer for tuning
Sum of bands
Tuning potentiometers
Volume control

4. Bandpass Filters

5. Bandpass Filters ∆|H| = 0.64 dB 3 dB frequencies 2nd order
179 Hz
223 Hz, 1795 Hz
2229 Hz
2nd order
Orthogonal Tuning
R1 for w0
R2 for Q
R3 for H

6. Oscillators
Produce sinusoid for calibration
Wein-Bridge

7. Microprocessor Three functions Three button input Volume control
Calibration
Viewing gain levels
Three button input
Up, down, enter

8. Other Concerns Switches Input device LCD Conditioning circuit
Bandpass filters
AC to DC converter
Microphone?