EESchema Schematic File Version 2 date Mit 07 Mär 2012 04:40:34 CET LIBS:power LIBS:device LIBS:transistors LIBS:conn LIBS:linear LIBS:regul LIBS:74xx LIBS:cmos4000 LIBS:adc-dac LIBS:memory LIBS:xilinx LIBS:special LIBS:microcontrollers LIBS:dsp LIBS:microchip LIBS:analog_switches LIBS:motorola LIBS:texas LIBS:intel LIBS:audio LIBS:interface LIBS:digital-audio LIBS:philips LIBS:display LIBS:cypress LIBS:siliconi LIBS:opto LIBS:atmel LIBS:contrib LIBS:valves LIBS:mur-sat LIBS:idm-cache EELAYER 24 0 EELAYER END $Descr A4 11700 8267 Sheet 1 1 Title "" Date "7 mar 2012" Rev "" Comp "" Comment1 "" Comment2 "" Comment3 "" Comment4 "" $EndDescr Wire Wire Line 9350 3200 9350 3250 Wire Wire Line 9400 2650 9000 2650 Wire Wire Line 7500 4000 7500 3950 Wire Wire Line 7500 3950 7550 3950 Wire Wire Line 7550 3850 7450 3850 Wire Wire Line 8700 3950 8600 3950 Wire Wire Line 8700 3750 8600 3750 Wire Wire Line 8650 3500 8650 3550 Wire Wire Line 8650 3550 8700 3550 Wire Wire Line 7400 2650 7300 2650 Wire Wire Line 7400 2350 7300 2350 Wire Wire Line 7400 2250 7300 2250 Wire Wire Line 7300 2050 7400 2050 Connection ~ 5450 2800 Wire Wire Line 5250 2800 5800 2800 Wire Wire Line 9100 2450 9000 2450 Wire Wire Line 9000 2150 9100 2150 Wire Wire Line 10350 1500 10150 1500 Wire Wire Line 10350 1200 10150 1200 Wire Wire Line 10300 1650 10300 1600 Wire Wire Line 10300 1600 10350 1600 Wire Wire Line 10350 2900 10250 2900 Wire Wire Line 10350 2700 10250 2700 Wire Wire Line 10350 2500 10250 2500 Wire Wire Line 10350 2400 10300 2400 Wire Wire Line 10300 2400 10300 2350 Connection ~ 5700 1950 Wire Wire Line 5800 1950 5250 1950 Wire Wire Line 5450 1950 5450 2000 Wire Wire Line 5450 2800 5450 3000 Wire Wire Line 5700 3400 5700 3700 Wire Wire Line 5100 3650 5100 3700 Wire Wire Line 5700 2450 5700 2400 Wire Wire Line 1000 5850 1050 5850 Wire Wire Line 8000 6350 8000 6300 Wire Wire Line 9450 6600 10600 6600 Wire Wire Line 9450 6600 9450 6250 Wire Wire Line 9200 5850 9200 5900 Connection ~ 8600 5850 Wire Wire Line 8600 5850 8600 5750 Connection ~ 8000 5850 Wire Wire Line 8000 5850 8000 5900 Wire Wire Line 9950 5700 9950 5650 Wire Wire Line 10200 5700 10200 5650 Wire Wire Line 9950 6400 9950 6450 Wire Wire Line 8050 5850 7950 5850 Wire Wire Line 8650 5850 8550 5850 Wire Wire Line 9150 5850 9450 5850 Connection ~ 9200 5850 Wire Wire Line 8600 5350 8600 5150 Wire Wire Line 8600 5150 10600 5150 Wire Wire Line 10600 5150 10600 6600 Connection ~ 10600 6050 Wire Wire Line 9200 6350 9200 6300 Connection ~ 4200 5850 Wire Wire Line 4250 5850 4200 5850 Wire Wire Line 1600 6350 1600 6300 Wire Wire Line 4200 6050 4150 6050 Wire Wire Line 3050 6600 4200 6600 Wire Wire Line 3050 6600 3050 6250 Wire Wire Line 2800 5850 2800 5900 Connection ~ 2200 5850 Wire Wire Line 2200 5850 2200 5750 Connection ~ 1600 5850 Wire Wire Line 1600 5850 1600 5900 Wire Wire Line 3550 5700 3550 5650 Wire Wire Line 3800 5700 3800 5650 Wire Wire Line 1950 2300 1800 2300 Wire Wire Line 1800 2300 1800 2500 Wire Wire Line 1800 2500 1750 2500 Wire Wire Line 2600 2900 2600 3000 Connection ~ 2600 2300 Wire Wire Line 2600 1700 2600 1650 Wire Wire Line 4200 4150 4200 4200 Wire Wire Line 4200 3050 4200 3100 Wire Wire Line 4200 2500 4200 2550 Wire Wire Line 3700 2150 3700 2100 Connection ~ 8000 1550 Wire Wire Line 8000 1450 8000 1650 Connection ~ 8400 1550 Wire Wire Line 8400 1450 8400 1650 Wire Wire Line 3450 2150 3450 2100 Wire Wire Line 3450 2900 3450 2850 Wire Wire Line 4200 3600 4200 3650 Wire Wire Line 4050 3350 2850 3350 Wire Wire Line 2850 3350 2850 2700 Wire Wire Line 2850 2700 2950 2700 Wire Wire Line 2350 2300 2950 2300 Wire Wire Line 2600 2200 2600 2400 Wire Wire Line 1750 2700 1800 2700 Wire Wire Line 1800 2700 1800 2850 Connection ~ 4200 2500 Wire Wire Line 3550 6400 3550 6450 Wire Wire Line 1650 5850 1550 5850 Wire Wire Line 2250 5850 2150 5850 Wire Wire Line 2750 5850 3050 5850 Connection ~ 2800 5850 Wire Wire Line 2200 5350 2200 5150 Wire Wire Line 2200 5150 4200 5150 Wire Wire Line 4200 5150 4200 6600 Connection ~ 4200 6050 Wire Wire Line 2800 6350 2800 6300 Wire Wire Line 6000 6350 6000 6300 Connection ~ 7400 6050 Wire Wire Line 7400 5150 7400 6600 Wire Wire Line 7400 5150 5400 5150 Wire Wire Line 5400 5150 5400 5350 Connection ~ 6000 5850 Wire Wire Line 5950 5850 6250 5850 Wire Wire Line 5450 5850 5350 5850 Wire Wire Line 4850 5850 4750 5850 Wire Wire Line 6750 6400 6750 6450 Wire Wire Line 7000 5700 7000 5650 Wire Wire Line 6750 5700 6750 5650 Wire Wire Line 4800 5900 4800 5850 Connection ~ 4800 5850 Wire Wire Line 5400 5750 5400 5850 Connection ~ 5400 5850 Wire Wire Line 6000 5900 6000 5850 Wire Wire Line 6250 6250 6250 6600 Wire Wire Line 6250 6600 7400 6600 Wire Wire Line 7350 6050 7400 6050 Wire Wire Line 4800 6350 4800 6300 Wire Wire Line 7400 5850 7450 5850 Connection ~ 7400 5850 Wire Wire Line 10550 6050 10700 6050 Wire Wire Line 5700 1950 5700 2000 Wire Wire Line 5450 2400 5450 2450 Wire Wire Line 5100 3150 5100 3050 Wire Wire Line 5100 1150 5100 1100 Wire Wire Line 4050 2500 5100 2500 Connection ~ 5100 2500 Wire Wire Line 5450 3400 5450 3700 Wire Wire Line 5700 2800 5700 3000 Wire Wire Line 5100 1700 5100 1650 Connection ~ 5450 1950 Wire Wire Line 5100 2200 5100 2550 Wire Wire Line 10350 3000 10300 3000 Wire Wire Line 10300 3000 10300 3050 Wire Wire Line 10250 2600 10350 2600 Wire Wire Line 10250 2800 10350 2800 Wire Wire Line 10350 1300 10300 1300 Wire Wire Line 10150 1400 10350 1400 Wire Wire Line 9100 2550 9000 2550 Wire Wire Line 7400 2450 7300 2450 Wire Wire Line 9100 2350 9000 2350 Wire Wire Line 9100 2050 9000 2050 Connection ~ 5700 2800 Wire Wire Line 7400 1950 7300 1950 Wire Wire Line 7400 2150 7300 2150 Wire Wire Line 9100 2250 9000 2250 Wire Wire Line 9000 1950 9100 1950 Wire Wire Line 7300 2550 7400 2550 Wire Wire Line 8600 3650 8700 3650 Wire Wire Line 8600 3850 8700 3850 Wire Wire Line 8700 4050 8650 4050 Wire Wire Line 8650 4050 8650 4100 Wire Wire Line 7550 3750 7500 3750 Wire Wire Line 7500 3750 7500 3700 Wire Wire Line 6950 3850 6900 3850 Wire Wire Line 9350 2700 9350 2650 Connection ~ 9350 2650 $Comp L GND #PWR01 U 1 1 4F56D6E5 P 9350 3250 F 0 "#PWR01" H 9350 3250 30 0001 C CNN F 1 "GND" H 9350 3180 30 0001 C CNN 1 9350 3250 1 0 0 -1 $EndComp $Comp L R R17 U 1 1 4F56D6CE P 9350 2950 F 0 "R17" V 9430 2950 50 0000 C CNN F 1 "470k" V 9350 2950 50 0000 C CNN 1 9350 2950 1 0 0 -1 $EndComp Text Label 9400 2650 0 60 ~ 0 FILTER_EN Text Label 8600 3950 2 60 ~ 0 RB0 Text Label 8600 3850 2 60 ~ 0 RA7 Text Label 8600 3750 2 60 ~ 0 RA6 Text Label 8600 3650 2 60 ~ 0 CCP4 Text Label 6900 3850 2 60 ~ 0 CCP4 $Comp L R R13 U 1 1 4F56D5B4 P 7200 3850 F 0 "R13" V 7280 3850 50 0000 C CNN F 1 "R" V 7200 3850 50 0000 C CNN 1 7200 3850 0 -1 -1 0 $EndComp $Comp L +3.3V #PWR02 U 1 1 4F56D5AC P 7500 3700 F 0 "#PWR02" H 7500 3660 30 0001 C CNN F 1 "+3.3V" H 7500 3810 30 0000 C CNN 1 7500 3700 1 0 0 -1 $EndComp $Comp L GND #PWR03 U 1 1 4F56D5A4 P 7500 4000 F 0 "#PWR03" H 7500 4000 30 0001 C CNN F 1 "GND" H 7500 3930 30 0001 C CNN 1 7500 4000 1 0 0 -1 $EndComp $Comp L +3.3V #PWR04 U 1 1 4F56D5A1 P 8650 3500 F 0 "#PWR04" H 8650 3460 30 0001 C CNN F 1 "+3.3V" H 8650 3610 30 0000 C CNN 1 8650 3500 1 0 0 -1 $EndComp $Comp L GND #PWR05 U 1 1 4F56D59E P 8650 4100 F 0 "#PWR05" H 8650 4100 30 0001 C CNN F 1 "GND" H 8650 4030 30 0001 C CNN 1 8650 4100 1 0 0 -1 $EndComp $Comp L CONN_3 K1 U 1 1 4F56D585 P 7900 3850 F 0 "K1" V 7850 3850 50 0000 C CNN F 1 "SPEAKER" V 7950 3850 40 0000 C CNN 1 7900 3850 1 0 0 -1 $EndComp $Comp L CONN_6 P2 U 1 1 4F56D57B P 9050 3800 F 0 "P2" V 9000 3800 60 0000 C CNN F 1 "UNUSED" V 9100 3800 60 0000 C CNN 1 9050 3800 1 0 0 -1 $EndComp Text Label 9100 1950 0 60 ~ 0 RB0 Text Label 7300 2650 2 60 ~ 0 RA7 Text Label 7300 2550 2 60 ~ 0 RA6 Text Label 7300 2350 2 60 ~ 0 CCP4 Text Label 9100 2250 0 60 ~ 0 INT Text Label 7300 2250 2 60 ~ 0 ADC_IN Text Label 7300 2150 2 60 ~ 0 AMP_OUT Text Label 7300 2050 2 60 ~ 0 C2+ Text Label 7300 1950 2 60 ~ 0 C1- Text Label 9100 2150 0 60 ~ 0 SDO Text Label 9100 2050 0 60 ~ 0 SDI Text Label 9100 2350 0 60 ~ 0 SCK Text Label 9100 2450 0 60 ~ 0 CS Text Label 9100 2550 0 60 ~ 0 PGC Text Label 9100 2650 0 60 ~ 0 PGD Text Label 7300 2450 2 60 ~ 0 MCLR Text Label 10150 1500 2 60 ~ 0 PGC Text Label 10150 1400 2 60 ~ 0 PGD Text Label 10150 1200 2 60 ~ 0 MCLR $Comp L GND #PWR06 U 1 1 4F56CFED P 10300 1650 F 0 "#PWR06" H 10300 1650 30 0001 C CNN F 1 "GND" H 10300 1580 30 0001 C CNN 1 10300 1650 1 0 0 -1 $EndComp $Comp L +3.3V #PWR07 U 1 1 4F56CFEA P 10300 1300 F 0 "#PWR07" H 10300 1260 30 0001 C CNN F 1 "+3.3V" H 10300 1410 30 0000 C CNN 1 10300 1300 0 -1 -1 0 $EndComp $Comp L CONN_5 P4 U 1 1 4F56CFE5 P 10750 1400 F 0 "P4" V 10700 1400 50 0000 C CNN F 1 "ICSP" V 10800 1400 50 0000 C CNN 1 10750 1400 1 0 0 -1 $EndComp Text Label 10250 2900 2 60 ~ 0 SDO Text Label 10250 2800 2 60 ~ 0 SDI Text Label 10250 2700 2 60 ~ 0 SCK Text Label 10250 2600 2 60 ~ 0 CS Text Label 10250 2500 2 60 ~ 0 INT $Comp L +3.3V #PWR08 U 1 1 4F56CF77 P 10300 2350 F 0 "#PWR08" H 10300 2310 30 0001 C CNN F 1 "+3.3V" H 10300 2460 30 0000 C CNN 1 10300 2350 1 0 0 -1 $EndComp $Comp L GND #PWR09 U 1 1 4F56CF70 P 10300 3050 F 0 "#PWR09" H 10300 3050 30 0001 C CNN F 1 "GND" H 10300 2980 30 0001 C CNN 1 10300 3050 1 0 0 -1 $EndComp $Comp L CONN_7 P3 U 1 1 4F56CF6C P 10700 2700 F 0 "P3" V 10670 2700 60 0000 C CNN F 1 "MPU" V 10770 2700 60 0000 C CNN 1 10700 2700 1 0 0 -1 $EndComp $Comp L POT RV2 U 1 1 4F56CEE5 P 5100 1950 F 0 "RV2" H 5100 1850 50 0000 C CNN F 1 "50k" H 5100 1950 50 0000 C CNN 1 5100 1950 0 1 1 0 $EndComp $Comp L POT RV3 U 1 1 4F56CE90 P 5100 2800 F 0 "RV3" H 5100 2700 50 0000 C CNN F 1 "50k" H 5100 2800 50 0000 C CNN 1 5100 2800 0 1 1 0 $EndComp Text Label 5800 1950 0 60 ~ 0 C1- Text Label 5800 2800 0 60 ~ 0 C2+ $Comp L +3.3V #PWR010 U 1 1 4F56CDD2 P 5100 1100 F 0 "#PWR010" H 5100 1060 30 0001 C CNN F 1 "+3.3V" H 5100 1210 30 0000 C CNN 1 5100 1100 1 0 0 -1 $EndComp $Comp L GND #PWR011 U 1 1 4F56CDB6 P 5100 3700 F 0 "#PWR011" H 5100 3700 30 0001 C CNN F 1 "GND" H 5100 3630 30 0001 C CNN 1 5100 3700 1 0 0 -1 $EndComp $Comp L R R10 U 1 1 4F56CDB1 P 5100 3400 F 0 "R10" V 5180 3400 50 0000 C CNN F 1 "330k" V 5100 3400 50 0000 C CNN 1 5100 3400 1 0 0 -1 $EndComp $Comp L C C8 U 1 1 4F56CDAF P 5450 3200 F 0 "C8" H 5500 3300 50 0000 L CNN F 1 "5µF" H 5500 3100 50 0000 L CNN 1 5450 3200 1 0 0 -1 $EndComp $Comp L C C10 U 1 1 4F56CDAE P 5700 3200 F 0 "C10" H 5750 3300 50 0000 L CNN F 1 "5µF" H 5750 3100 50 0000 L CNN 1 5700 3200 1 0 0 -1 $EndComp $Comp L GND #PWR012 U 1 1 4F56CDAD P 5700 3700 F 0 "#PWR012" H 5700 3700 30 0001 C CNN F 1 "GND" H 5700 3630 30 0001 C CNN 1 5700 3700 1 0 0 -1 $EndComp $Comp L GND #PWR013 U 1 1 4F56CDAC P 5450 3700 F 0 "#PWR013" H 5450 3700 30 0001 C CNN F 1 "GND" H 5450 3630 30 0001 C CNN 1 5450 3700 1 0 0 -1 $EndComp $Comp L GND #PWR014 U 1 1 4F56CD9B P 5450 2450 F 0 "#PWR014" H 5450 2450 30 0001 C CNN F 1 "GND" H 5450 2380 30 0001 C CNN 1 5450 2450 1 0 0 -1 $EndComp $Comp L GND #PWR015 U 1 1 4F56CD99 P 5700 2450 F 0 "#PWR015" H 5700 2450 30 0001 C CNN F 1 "GND" H 5700 2380 30 0001 C CNN 1 5700 2450 1 0 0 -1 $EndComp $Comp L C C9 U 1 1 4F56CD43 P 5700 2200 F 0 "C9" H 5750 2300 50 0000 L CNN F 1 "5µF" H 5750 2100 50 0000 L CNN 1 5700 2200 1 0 0 -1 $EndComp $Comp L C C7 U 1 1 4F56CD3B P 5450 2200 F 0 "C7" H 5500 2300 50 0000 L CNN F 1 "5µF" H 5500 2100 50 0000 L CNN 1 5450 2200 1 0 0 -1 $EndComp $Comp L R R9 U 1 1 4F56CD2D P 5100 1400 F 0 "R9" V 5180 1400 50 0000 C CNN F 1 "330k" V 5100 1400 50 0000 C CNN 1 5100 1400 1 0 0 -1 $EndComp Text Label 10700 6050 0 60 ~ 0 ADC_IN Text Label 1000 5850 2 60 ~ 0 AMP_OUT $Comp L GND #PWR016 U 1 1 4F56CC3C P 9200 6350 F 0 "#PWR016" H 9200 6350 30 0001 C CNN F 1 "GND" H 9200 6280 30 0001 C CNN 1 9200 6350 1 0 0 -1 $EndComp $Comp L GND #PWR017 U 1 1 4F56CC3B P 8000 6350 F 0 "#PWR017" H 8000 6350 30 0001 C CNN F 1 "GND" H 8000 6280 30 0001 C CNN 1 8000 6350 1 0 0 -1 $EndComp $Comp L C C14 U 1 1 4F56CC3A P 8600 5550 F 0 "C14" H 8650 5650 50 0000 L CNN F 1 "47nF" H 8650 5450 50 0000 L CNN 1 8600 5550 1 0 0 -1 $EndComp $Comp L C C12 U 1 1 4F56CC39 P 8000 6100 F 0 "C12" H 8050 6200 50 0000 L CNN F 1 "220nF" H 8050 6000 50 0000 L CNN 1 8000 6100 1 0 0 -1 $EndComp $Comp L R R16 U 1 1 4F56CC38 P 8900 5850 F 0 "R16" V 8980 5850 50 0000 C CNN F 1 "3k0" V 8900 5850 50 0000 C CNN 1 8900 5850 0 1 1 0 $EndComp $Comp L R R14 U 1 1 4F56CC37 P 7700 5850 F 0 "R14" V 7780 5850 50 0000 C CNN F 1 "430R" V 7700 5850 50 0000 C CNN 1 7700 5850 0 1 1 0 $EndComp $Comp L R R15 U 1 1 4F56CC36 P 8300 5850 F 0 "R15" V 8380 5850 50 0000 C CNN F 1 "6k8" V 8300 5850 50 0000 C CNN 1 8300 5850 0 1 1 0 $EndComp $Comp L C C15 U 1 1 4F56CC35 P 9200 6100 F 0 "C15" H 9250 6200 50 0000 L CNN F 1 "2,2nF" H 9250 6000 50 0000 L CNN 1 9200 6100 1 0 0 -1 $EndComp Text Label 10200 5650 1 60 ~ 0 FILTER_EN $Comp L GND #PWR018 U 1 1 4F56CC34 P 9950 6450 F 0 "#PWR018" H 9950 6450 30 0001 C CNN F 1 "GND" H 9950 6380 30 0001 C CNN 1 9950 6450 1 0 0 -1 $EndComp $Comp L +3.3V #PWR019 U 1 1 4F56CC33 P 9950 5650 F 0 "#PWR019" H 9950 5610 30 0001 C CNN F 1 "+3.3V" H 9950 5760 30 0000 C CNN 1 9950 5650 1 0 0 -1 $EndComp $Comp L MAX9913 U2 U 2 1 4F56CC32 P 9950 6050 F 0 "U2" H 10050 5700 60 0000 C CNN F 1 "MAX9913" H 10150 5800 60 0000 C CNN 2 9950 6050 1 0 0 -1 $EndComp $Comp L MAX9913 U2 U 1 1 4F56CBF6 P 6750 6050 F 0 "U2" H 6850 5700 60 0000 C CNN F 1 "MAX9913" H 6950 5800 60 0000 C CNN 1 6750 6050 1 0 0 -1 $EndComp $Comp L +3.3V #PWR020 U 1 1 4F56CBF5 P 6750 5650 F 0 "#PWR020" H 6750 5610 30 0001 C CNN F 1 "+3.3V" H 6750 5760 30 0000 C CNN 1 6750 5650 1 0 0 -1 $EndComp $Comp L GND #PWR021 U 1 1 4F56CBF4 P 6750 6450 F 0 "#PWR021" H 6750 6450 30 0001 C CNN F 1 "GND" H 6750 6380 30 0001 C CNN 1 6750 6450 1 0 0 -1 $EndComp Text Label 7000 5650 1 60 ~ 0 FILTER_EN $Comp L C C11 U 1 1 4F56CBF3 P 6000 6100 F 0 "C11" H 6050 6200 50 0000 L CNN F 1 "2,2nF" H 6050 6000 50 0000 L CNN 1 6000 6100 1 0 0 -1 $EndComp $Comp L R R11 U 1 1 4F56CBF2 P 5100 5850 F 0 "R11" V 5180 5850 50 0000 C CNN F 1 "6k8" V 5100 5850 50 0000 C CNN 1 5100 5850 0 1 1 0 $EndComp $Comp L R R8 U 1 1 4F56CBF1 P 4500 5850 F 0 "R8" V 4580 5850 50 0000 C CNN F 1 "430R" V 4500 5850 50 0000 C CNN 1 4500 5850 0 1 1 0 $EndComp $Comp L R R12 U 1 1 4F56CBF0 P 5700 5850 F 0 "R12" V 5780 5850 50 0000 C CNN F 1 "3k0" V 5700 5850 50 0000 C CNN 1 5700 5850 0 1 1 0 $EndComp $Comp L C C5 U 1 1 4F56CBEF P 4800 6100 F 0 "C5" H 4850 6200 50 0000 L CNN F 1 "220nF" H 4850 6000 50 0000 L CNN 1 4800 6100 1 0 0 -1 $EndComp $Comp L C C6 U 1 1 4F56CBEE P 5400 5550 F 0 "C6" H 5450 5650 50 0000 L CNN F 1 "47nF" H 5450 5450 50 0000 L CNN 1 5400 5550 1 0 0 -1 $EndComp $Comp L GND #PWR022 U 1 1 4F56CBED P 4800 6350 F 0 "#PWR022" H 4800 6350 30 0001 C CNN F 1 "GND" H 4800 6280 30 0001 C CNN 1 4800 6350 1 0 0 -1 $EndComp $Comp L GND #PWR023 U 1 1 4F56CBEC P 6000 6350 F 0 "#PWR023" H 6000 6350 30 0001 C CNN F 1 "GND" H 6000 6280 30 0001 C CNN 1 6000 6350 1 0 0 -1 $EndComp $Comp L GND #PWR024 U 1 1 4F56CB68 P 2800 6350 F 0 "#PWR024" H 2800 6350 30 0001 C CNN F 1 "GND" H 2800 6280 30 0001 C CNN 1 2800 6350 1 0 0 -1 $EndComp $Comp L GND #PWR025 U 1 1 4F56CB66 P 1600 6350 F 0 "#PWR025" H 1600 6350 30 0001 C CNN F 1 "GND" H 1600 6280 30 0001 C CNN 1 1600 6350 1 0 0 -1 $EndComp $Comp L C C3 U 1 1 4F56CB2B P 2200 5550 F 0 "C3" H 2250 5650 50 0000 L CNN F 1 "47nF" H 2250 5450 50 0000 L CNN 1 2200 5550 1 0 0 -1 $EndComp $Comp L C C1 U 1 1 4F56CB2A P 1600 6100 F 0 "C1" H 1650 6200 50 0000 L CNN F 1 "220nF" H 1650 6000 50 0000 L CNN 1 1600 6100 1 0 0 -1 $EndComp $Comp L R R3 U 1 1 4F56CB28 P 2500 5850 F 0 "R3" V 2580 5850 50 0000 C CNN F 1 "3k0" V 2500 5850 50 0000 C CNN 1 2500 5850 0 1 1 0 $EndComp $Comp L R R1 U 1 1 4F56CB27 P 1300 5850 F 0 "R1" V 1380 5850 50 0000 C CNN F 1 "430R" V 1300 5850 50 0000 C CNN 1 1300 5850 0 1 1 0 $EndComp $Comp L R R2 U 1 1 4F56CB22 P 1900 5850 F 0 "R2" V 1980 5850 50 0000 C CNN F 1 "6k8" V 1900 5850 50 0000 C CNN 1 1900 5850 0 1 1 0 $EndComp $Comp L C C4 U 1 1 4F56CB20 P 2800 6100 F 0 "C4" H 2850 6200 50 0000 L CNN F 1 "2,2nF" H 2850 6000 50 0000 L CNN 1 2800 6100 1 0 0 -1 $EndComp Text Label 3800 5650 1 60 ~ 0 FILTER_EN Text Label 4550 2500 0 60 ~ 0 AMP_OUT $Comp L +3.3V #PWR026 U 1 1 4F56CA59 P 2600 1650 F 0 "#PWR026" H 2600 1610 30 0001 C CNN F 1 "+3.3V" H 2600 1760 30 0000 C CNN 1 2600 1650 1 0 0 -1 $EndComp $Comp L GND #PWR027 U 1 1 4F56CA1A P 4200 4200 F 0 "#PWR027" H 4200 4200 30 0001 C CNN F 1 "GND" H 4200 4130 30 0001 C CNN 1 4200 4200 1 0 0 -1 $EndComp $Comp L +3.3V #PWR028 U 1 1 4F56C95E P 3700 2100 F 0 "#PWR028" H 3700 2060 30 0001 C CNN F 1 "+3.3V" H 3700 2210 30 0000 C CNN 1 3700 2100 1 0 0 -1 $EndComp $Comp L R R7 U 1 1 4F56C952 P 4200 3900 F 0 "R7" V 4280 3900 50 0000 C CNN F 1 "10k" V 4200 3900 50 0000 C CNN 1 4200 3900 1 0 0 -1 $EndComp $Comp L R R6 U 1 1 4F56C94E P 4200 2800 F 0 "R6" V 4280 2800 50 0000 C CNN F 1 "10k" V 4200 2800 50 0000 C CNN 1 4200 2800 1 0 0 -1 $EndComp $Comp L POT RV1 U 1 1 4F56C949 P 4200 3350 F 0 "RV1" H 4200 3250 50 0000 C CNN F 1 "100k" H 4200 3350 50 0000 C CNN 1 4200 3350 0 -1 -1 0 $EndComp $Comp L GND #PWR029 U 1 1 4F56C942 P 1800 2850 F 0 "#PWR029" H 1800 2850 30 0001 C CNN F 1 "GND" H 1800 2780 30 0001 C CNN 1 1800 2850 1 0 0 -1 $EndComp $Comp L GND #PWR030 U 1 1 4F56C940 P 2600 3000 F 0 "#PWR030" H 2600 3000 30 0001 C CNN F 1 "GND" H 2600 2930 30 0001 C CNN 1 2600 3000 1 0 0 -1 $EndComp $Comp L C C2 U 1 1 4F56C903 P 2150 2300 F 0 "C2" H 2200 2400 50 0000 L CNN F 1 "47µF" H 2200 2200 50 0000 L CNN 1 2150 2300 0 1 1 0 $EndComp $Comp L R R5 U 1 1 4F56C8FE P 2600 2650 F 0 "R5" V 2680 2650 50 0000 C CNN F 1 "470k" V 2600 2650 50 0000 C CNN 1 2600 2650 1 0 0 -1 $EndComp $Comp L R R4 U 1 1 4F56C8E4 P 2600 1950 F 0 "R4" V 2680 1950 50 0000 C CNN F 1 "470k" V 2600 1950 50 0000 C CNN 1 2600 1950 1 0 0 -1 $EndComp $Comp L CONN_2 P1 U 1 1 4F56C8DB P 1400 2600 F 0 "P1" V 1350 2600 40 0000 C CNN F 1 "MIC_IN" V 1450 2600 40 0000 C CNN 1 1400 2600 -1 0 0 1 $EndComp $Comp L C C13 U 1 1 4F56B741 P 8200 1550 F 0 "C13" H 8250 1650 50 0000 L CNN F 1 "100nF" H 8250 1450 50 0000 L CNN 1 8200 1550 0 1 1 0 $EndComp $Comp L GND #PWR031 U 1 1 4F56B73F P 8400 1450 F 0 "#PWR031" H 8400 1450 30 0001 C CNN F 1 "GND" H 8400 1380 30 0001 C CNN 1 8400 1450 -1 0 0 1 $EndComp $Comp L +3.3V #PWR032 U 1 1 4F56B73C P 8000 1450 F 0 "#PWR032" H 8000 1410 30 0001 C CNN F 1 "+3.3V" H 8000 1560 30 0000 C CNN 1 8000 1450 1 0 0 -1 $EndComp $Comp L PIC16F1847SO U3 U 1 1 4F56B72F P 8200 2300 F 0 "U3" H 8200 2350 60 0000 C CNN F 1 "PIC16F1847SO" H 8200 2250 60 0000 C CNN 1 8200 2300 1 0 0 -1 $EndComp $Comp L GND #PWR033 U 1 1 4F56B6FA P 3450 2900 F 0 "#PWR033" H 3450 2900 30 0001 C CNN F 1 "GND" H 3450 2830 30 0001 C CNN 1 3450 2900 1 0 0 -1 $EndComp $Comp L GND #PWR034 U 1 1 4F56B6F7 P 3550 6450 F 0 "#PWR034" H 3550 6450 30 0001 C CNN F 1 "GND" H 3550 6380 30 0001 C CNN 1 3550 6450 1 0 0 -1 $EndComp $Comp L +3.3V #PWR035 U 1 1 4F56B6E8 P 3550 5650 F 0 "#PWR035" H 3550 5610 30 0001 C CNN F 1 "+3.3V" H 3550 5760 30 0000 C CNN 1 3550 5650 1 0 0 -1 $EndComp $Comp L +3.3V #PWR036 U 1 1 4F56B6E5 P 3450 2100 F 0 "#PWR036" H 3450 2060 30 0001 C CNN F 1 "+3.3V" H 3450 2210 30 0000 C CNN 1 3450 2100 1 0 0 -1 $EndComp $Comp L MAX9913 U1 U 1 1 4F56B59C P 3450 2500 F 0 "U1" H 3550 2150 60 0000 C CNN F 1 "MAX9913" H 3650 2250 60 0000 C CNN 1 3450 2500 1 0 0 -1 $EndComp $Comp L MAX9913 U1 U 2 1 4F56B58F P 3550 6050 F 0 "U1" H 3650 5700 60 0000 C CNN F 1 "MAX9913" H 3750 5800 60 0000 C CNN 2 3550 6050 1 0 0 -1 $EndComp $EndSCHEMATC