EESchema Schematic File Version 2 date Sam 10 Mär 2012 04:03:29 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 25 0 EELAYER END $Descr A4 11700 8267 encoding utf-8 Sheet 1 1 Title "" Date "10 mar 2012" Rev "" Comp "" Comment1 "" Comment2 "" Comment3 "" Comment4 "" $EndDescr Wire Wire Line 5550 3300 5550 3250 Connection ~ 5300 2800 Wire Wire Line 5300 2850 5300 2800 Wire Wire Line 10250 2600 10350 2600 Wire Wire Line 9550 4200 9450 4200 Wire Wire Line 9550 4000 9450 4000 Connection ~ 4200 6050 Wire Wire Line 4200 5850 4250 5850 Connection ~ 7400 5850 Connection ~ 7400 5150 Wire Wire Line 7400 5150 7400 6600 Connection ~ 10400 4100 Wire Wire Line 10350 4100 10400 4100 Wire Wire Line 10350 4300 10400 4300 Wire Wire Line 10400 4300 10400 4000 Wire Wire Line 10650 5150 8600 5150 Wire Wire Line 4250 5150 2200 5150 Connection ~ 9250 2650 Wire Wire Line 9250 2700 9250 2650 Wire Wire Line 6550 4150 6500 4150 Wire Wire Line 7100 4000 7100 4050 Wire Wire Line 7100 4050 7150 4050 Wire Wire Line 8250 4400 8250 4350 Wire Wire Line 8250 4350 8300 4350 Wire Wire Line 8200 4150 8300 4150 Wire Wire Line 8200 3950 8300 3950 Wire Wire Line 7200 2550 7300 2550 Wire Wire Line 8900 1950 9000 1950 Wire Wire Line 9000 2250 8900 2250 Wire Wire Line 7300 2150 7200 2150 Wire Wire Line 7300 1950 7200 1950 Wire Wire Line 9000 2050 8900 2050 Wire Wire Line 9000 2350 8900 2350 Wire Wire Line 7300 2450 7200 2450 Wire Wire Line 9000 2550 8900 2550 Wire Wire Line 10100 1450 10300 1450 Wire Wire Line 10300 1350 10250 1350 Wire Wire Line 10250 3000 10350 3000 Wire Wire Line 10250 2800 10350 2800 Wire Wire Line 10300 3250 10300 3200 Wire Wire Line 10300 3200 10350 3200 Wire Wire Line 4950 2200 4950 2550 Connection ~ 5300 1950 Wire Wire Line 4950 1700 4950 1650 Wire Wire Line 4950 1150 4950 1100 Wire Wire Line 4950 3150 4950 3050 Wire Wire Line 5300 2400 5300 2450 Wire Wire Line 5550 1950 5550 2000 Wire Wire Line 7400 5850 7450 5850 Wire Wire Line 4800 6350 4800 6300 Wire Wire Line 7400 6050 7350 6050 Wire Wire Line 7400 6600 6250 6600 Wire Wire Line 6250 6600 6250 6250 Wire Wire Line 6000 5900 6000 5850 Connection ~ 5400 5850 Wire Wire Line 5400 5750 5400 5850 Connection ~ 4800 5850 Wire Wire Line 4800 5900 4800 5850 Wire Wire Line 6750 5700 6750 5650 Wire Wire Line 7000 5700 7000 5650 Wire Wire Line 6750 6400 6750 6450 Wire Wire Line 4850 5850 4750 5850 Wire Wire Line 5450 5850 5350 5850 Wire Wire Line 5950 5850 6250 5850 Connection ~ 6000 5850 Wire Wire Line 5400 5350 5400 5150 Wire Wire Line 6000 6350 6000 6300 Wire Wire Line 2800 6350 2800 6300 Wire Wire Line 2200 5150 2200 5350 Connection ~ 2800 5850 Wire Wire Line 2750 5850 3050 5850 Wire Wire Line 2250 5850 2150 5850 Wire Wire Line 1650 5850 1550 5850 Wire Wire Line 3550 6400 3550 6450 Wire Wire Line 1700 2750 1700 2600 Wire Wire Line 1700 2600 1650 2600 Wire Wire Line 2500 2100 2500 2300 Wire Wire Line 2250 2200 2850 2200 Wire Wire Line 2850 2600 2750 2600 Wire Wire Line 2750 2600 2750 3250 Wire Wire Line 2750 3250 3950 3250 Wire Wire Line 4100 3500 4100 3550 Wire Wire Line 3350 2800 3350 2750 Wire Wire Line 3350 2050 3350 2000 Wire Wire Line 8300 1450 8300 1650 Connection ~ 8300 1550 Wire Wire Line 7900 1450 7900 1650 Connection ~ 7900 1550 Wire Wire Line 3600 2050 3600 2000 Wire Wire Line 4100 2400 4100 2450 Wire Wire Line 4100 2950 4100 3000 Wire Wire Line 4100 4050 4100 4100 Wire Wire Line 2500 1600 2500 1550 Connection ~ 2500 2200 Wire Wire Line 2500 2800 2500 2900 Wire Wire Line 1650 2400 1700 2400 Wire Wire Line 1700 2400 1700 2200 Wire Wire Line 1700 2200 1850 2200 Wire Wire Line 3800 5700 3800 5650 Wire Wire Line 3550 5700 3550 5650 Wire Wire Line 1600 5850 1600 5900 Connection ~ 1600 5850 Wire Wire Line 2200 5850 2200 5750 Connection ~ 2200 5850 Wire Wire Line 2800 5850 2800 5900 Wire Wire Line 3050 6250 3050 6600 Wire Wire Line 3050 6600 4200 6600 Wire Wire Line 1600 6350 1600 6300 Wire Wire Line 9200 6350 9200 6300 Wire Wire Line 8600 5150 8600 5350 Connection ~ 9200 5850 Wire Wire Line 9150 5850 9450 5850 Wire Wire Line 8650 5850 8550 5850 Wire Wire Line 8050 5850 7950 5850 Wire Wire Line 9950 6400 9950 6450 Wire Wire Line 10200 5700 10200 5650 Wire Wire Line 9950 5700 9950 5650 Wire Wire Line 8000 5850 8000 5900 Connection ~ 8000 5850 Wire Wire Line 8600 5850 8600 5750 Connection ~ 8600 5850 Wire Wire Line 9200 5850 9200 5900 Wire Wire Line 9450 6250 9450 6600 Wire Wire Line 9450 6600 10600 6600 Wire Wire Line 8000 6350 8000 6300 Wire Wire Line 1000 5850 1050 5850 Wire Wire Line 5550 2450 5550 2400 Wire Wire Line 4950 3650 4950 3700 Wire Wire Line 5300 1950 5300 2000 Connection ~ 5550 1950 Wire Wire Line 10300 2450 10300 2500 Wire Wire Line 10300 2500 10350 2500 Wire Wire Line 10350 2700 10250 2700 Wire Wire Line 10350 2900 10250 2900 Wire Wire Line 10350 3100 10250 3100 Wire Wire Line 10300 1650 10250 1650 Wire Wire Line 10250 1650 10250 1700 Wire Wire Line 10300 1250 10100 1250 Wire Wire Line 10300 1550 10100 1550 Wire Wire Line 8900 2150 9000 2150 Wire Wire Line 9000 2450 8900 2450 Wire Wire Line 7200 2050 7300 2050 Wire Wire Line 7300 2250 7200 2250 Wire Wire Line 7300 2350 7200 2350 Wire Wire Line 7300 2650 7200 2650 Wire Wire Line 8300 3850 8250 3850 Wire Wire Line 8250 3850 8250 3800 Wire Wire Line 8300 4050 8200 4050 Wire Wire Line 8300 4250 8200 4250 Wire Wire Line 7150 4150 7050 4150 Wire Wire Line 7150 4250 7100 4250 Wire Wire Line 7100 4250 7100 4300 Wire Wire Line 9300 2650 8900 2650 Wire Wire Line 9250 3200 9250 3250 Wire Wire Line 5400 5150 7450 5150 Wire Wire Line 5800 1950 5100 1950 Wire Wire Line 5800 2800 5100 2800 Wire Wire Line 10600 6050 10550 6050 Wire Wire Line 10400 4000 10350 4000 Wire Wire Line 10450 4150 10400 4150 Connection ~ 10400 4150 Wire Wire Line 10350 4200 10400 4200 Connection ~ 10400 4200 Wire Wire Line 10600 6600 10600 5150 Connection ~ 10600 5150 Connection ~ 10600 6050 Connection ~ 7400 6050 Wire Wire Line 4200 6050 4150 6050 Wire Wire Line 4200 6600 4200 5150 Connection ~ 4200 5150 Connection ~ 4200 5850 Connection ~ 4950 2400 Wire Wire Line 3950 2400 4950 2400 Connection ~ 4100 2400 Wire Wire Line 9450 4100 9550 4100 Wire Wire Line 9450 4300 9550 4300 Wire Wire Line 5550 2850 5550 2800 Connection ~ 5550 2800 Wire Wire Line 5300 3300 5300 3250 Text Label 10250 2600 2 60 ~ 0 PWRDWN $Comp L CONN_8 P105 U 1 1 4F5A4C4E P 10700 2850 F 0 "P105" V 10650 2850 60 0000 C CNN F 1 "MPU" V 10750 2850 60 0000 C CNN 1 10700 2850 1 0 0 -1 $EndComp $Comp L +3.3V #PWR10 U 1 1 4F56C95E P 3600 2000 F 0 "#PWR10" H 3600 1960 30 0001 C CNN F 1 "+3.3V" H 3600 2110 30 0000 C CNN 1 3600 2000 1 0 0 -1 $EndComp Text Label 9450 4300 2 60 ~ 0 F3_OUT Text Label 9450 4200 2 60 ~ 0 F2_OUT Text Label 9450 4000 2 60 ~ 0 AMP_OUT Text Label 9450 4100 2 60 ~ 0 F1_OUT $Comp L CONN_4X2 P101 U 1 1 4F5A095E P 9950 4150 F 0 "P101" H 9950 4400 50 0000 C CNN F 1 "ADC_SEL" V 9950 4150 40 0000 C CNN 1 9950 4150 1 0 0 -1 $EndComp $Comp L TST P104 U 1 1 4F5A06F2 P 5800 2800 F 0 "P104" H 5800 3100 40 0000 C CNN F 1 "COMP_LOW" H 5800 3050 30 0000 C CNN 1 5800 2800 0 1 1 0 $EndComp $Comp L TST P103 U 1 1 4F5A06E6 P 5800 1950 F 0 "P103" H 5800 2250 40 0000 C CNN F 1 "COMP_HIGH" H 5800 2200 30 0000 C CNN 1 5800 1950 0 1 1 0 $EndComp Text Label 10650 5150 0 60 ~ 0 F3_OUT Text Label 7450 5150 0 60 ~ 0 F2_OUT Text Label 4250 5150 0 60 ~ 0 F1_OUT $Comp L GND #PWR30 U 1 1 4F56D6E5 P 9250 3250 F 0 "#PWR30" H 9250 3250 30 0001 C CNN F 1 "GND" H 9250 3180 30 0001 C CNN 1 9250 3250 1 0 0 -1 $EndComp $Comp L R R17 U 1 1 4F56D6CE P 9250 2950 F 0 "R17" V 9330 2950 50 0000 C CNN F 1 "470k" V 9250 2950 50 0000 C CNN 1 9250 2950 1 0 0 -1 $EndComp Text Label 9300 2650 0 60 ~ 0 FILTER_EN Text Label 8200 4250 2 60 ~ 0 RB0 Text Label 8200 4150 2 60 ~ 0 RA7 Text Label 8200 4050 2 60 ~ 0 RA6 Text Label 8200 3950 2 60 ~ 0 CCP4 Text Label 6500 4150 2 60 ~ 0 CCP4 $Comp L R R13 U 1 1 4F56D5B4 P 6800 4150 F 0 "R13" V 6880 4150 50 0000 C CNN F 1 "R" V 6800 4150 50 0000 C CNN 1 6800 4150 0 -1 -1 0 $EndComp $Comp L +3.3V #PWR22 U 1 1 4F56D5AC P 7100 4000 F 0 "#PWR22" H 7100 3960 30 0001 C CNN F 1 "+3.3V" H 7100 4110 30 0000 C CNN 1 7100 4000 1 0 0 -1 $EndComp $Comp L GND #PWR23 U 1 1 4F56D5A4 P 7100 4300 F 0 "#PWR23" H 7100 4300 30 0001 C CNN F 1 "GND" H 7100 4230 30 0001 C CNN 1 7100 4300 1 0 0 -1 $EndComp $Comp L +3.3V #PWR26 U 1 1 4F56D5A1 P 8250 3800 F 0 "#PWR26" H 8250 3760 30 0001 C CNN F 1 "+3.3V" H 8250 3910 30 0000 C CNN 1 8250 3800 1 0 0 -1 $EndComp $Comp L GND #PWR27 U 1 1 4F56D59E P 8250 4400 F 0 "#PWR27" H 8250 4400 30 0001 C CNN F 1 "GND" H 8250 4330 30 0001 C CNN 1 8250 4400 1 0 0 -1 $EndComp $Comp L CONN_3 K1 U 1 1 4F56D585 P 7500 4150 F 0 "K1" V 7450 4150 50 0000 C CNN F 1 "SPEAKER" V 7550 4150 40 0000 C CNN 1 7500 4150 1 0 0 -1 $EndComp $Comp L CONN_6 P2 U 1 1 4F56D57B P 8650 4100 F 0 "P2" V 8600 4100 60 0000 C CNN F 1 "UNUSED" V 8700 4100 60 0000 C CNN 1 8650 4100 1 0 0 -1 $EndComp Text Label 9000 1950 0 60 ~ 0 RB0 Text Label 7200 2650 2 60 ~ 0 RA7 Text Label 7200 2550 2 60 ~ 0 RA6 Text Label 7200 2350 2 60 ~ 0 CCP4 Text Label 9000 2250 0 60 ~ 0 INT Text Label 7200 2250 2 60 ~ 0 ADC_IN Text Label 7200 2150 2 60 ~ 0 AMP_OUT Text Label 7200 2050 2 60 ~ 0 C2+ Text Label 7200 1950 2 60 ~ 0 C1- Text Label 9000 2150 0 60 ~ 0 SDO Text Label 9000 2050 0 60 ~ 0 SDI Text Label 9000 2350 0 60 ~ 0 SCK Text Label 9000 2450 0 60 ~ 0 CS Text Label 9000 2550 0 60 ~ 0 PGC Text Label 9000 2650 0 60 ~ 0 PGD Text Label 7200 2450 2 60 ~ 0 MCLR Text Label 10100 1550 2 60 ~ 0 PGC Text Label 10100 1450 2 60 ~ 0 PGD Text Label 10100 1250 2 60 ~ 0 MCLR $Comp L GND #PWR34 U 1 1 4F56CFED P 10250 1700 F 0 "#PWR34" H 10250 1700 30 0001 C CNN F 1 "GND" H 10250 1630 30 0001 C CNN 1 10250 1700 1 0 0 -1 $EndComp $Comp L +3.3V #PWR33 U 1 1 4F56CFEA P 10250 1350 F 0 "#PWR33" H 10250 1310 30 0001 C CNN F 1 "+3.3V" H 10250 1460 30 0000 C CNN 1 10250 1350 0 -1 -1 0 $EndComp $Comp L CONN_5 P4 U 1 1 4F56CFE5 P 10700 1450 F 0 "P4" V 10650 1450 50 0000 C CNN F 1 "ICSP" V 10750 1450 50 0000 C CNN 1 10700 1450 1 0 0 -1 $EndComp Text Label 10250 3100 2 60 ~ 0 SDO Text Label 10250 3000 2 60 ~ 0 SDI Text Label 10250 2900 2 60 ~ 0 SCK Text Label 10250 2800 2 60 ~ 0 CS Text Label 10250 2700 2 60 ~ 0 INT $Comp L +3.3V #PWR35 U 1 1 4F56CF77 P 10300 2450 F 0 "#PWR35" H 10300 2410 30 0001 C CNN F 1 "+3.3V" H 10300 2560 30 0000 C CNN 1 10300 2450 1 0 0 -1 $EndComp $Comp L GND #PWR36 U 1 1 4F56CF70 P 10300 3250 F 0 "#PWR36" H 10300 3250 30 0001 C CNN F 1 "GND" H 10300 3180 30 0001 C CNN 1 10300 3250 1 0 0 -1 $EndComp $Comp L POT RV2 U 1 1 4F56CEE5 P 4950 1950 F 0 "RV2" H 4950 1850 50 0000 C CNN F 1 "50k" H 4950 1950 50 0000 C CNN 1 4950 1950 0 1 1 0 $EndComp $Comp L POT RV3 U 1 1 4F56CE90 P 4950 2800 F 0 "RV3" H 4950 2700 50 0000 C CNN F 1 "50k" H 4950 2800 50 0000 C CNN 1 4950 2800 0 1 1 0 $EndComp Text Label 5650 1950 0 60 ~ 0 C1- Text Label 5650 2800 0 60 ~ 0 C2+ $Comp L +3.3V #PWR13 U 1 1 4F56CDD2 P 4950 1100 F 0 "#PWR13" H 4950 1060 30 0001 C CNN F 1 "+3.3V" H 4950 1210 30 0000 C CNN 1 4950 1100 1 0 0 -1 $EndComp $Comp L GND #PWR14 U 1 1 4F56CDB6 P 4950 3700 F 0 "#PWR14" H 4950 3700 30 0001 C CNN F 1 "GND" H 4950 3630 30 0001 C CNN 1 4950 3700 1 0 0 -1 $EndComp $Comp L R R10 U 1 1 4F56CDB1 P 4950 3400 F 0 "R10" V 5030 3400 50 0000 C CNN F 1 "330k" V 4950 3400 50 0000 C CNN 1 4950 3400 1 0 0 -1 $EndComp $Comp L C C8 U 1 1 4F56CDAF P 5300 3050 F 0 "C8" H 5350 3150 50 0000 L CNN F 1 "5µF" H 5350 2950 50 0000 L CNN 1 5300 3050 1 0 0 -1 $EndComp $Comp L C C10 U 1 1 4F56CDAE P 5550 3050 F 0 "C10" H 5600 3150 50 0000 L CNN F 1 "5µF" H 5600 2950 50 0000 L CNN 1 5550 3050 1 0 0 -1 $EndComp $Comp L GND #PWR18 U 1 1 4F56CDAD P 5550 3300 F 0 "#PWR18" H 5550 3300 30 0001 C CNN F 1 "GND" H 5550 3230 30 0001 C CNN 1 5550 3300 1 0 0 -1 $EndComp $Comp L GND #PWR16 U 1 1 4F56CDAC P 5300 3300 F 0 "#PWR16" H 5300 3300 30 0001 C CNN F 1 "GND" H 5300 3230 30 0001 C CNN 1 5300 3300 1 0 0 -1 $EndComp $Comp L GND #PWR15 U 1 1 4F56CD9B P 5300 2450 F 0 "#PWR15" H 5300 2450 30 0001 C CNN F 1 "GND" H 5300 2380 30 0001 C CNN 1 5300 2450 1 0 0 -1 $EndComp $Comp L GND #PWR17 U 1 1 4F56CD99 P 5550 2450 F 0 "#PWR17" H 5550 2450 30 0001 C CNN F 1 "GND" H 5550 2380 30 0001 C CNN 1 5550 2450 1 0 0 -1 $EndComp $Comp L C C9 U 1 1 4F56CD43 P 5550 2200 F 0 "C9" H 5600 2300 50 0000 L CNN F 1 "5µF" H 5600 2100 50 0000 L CNN 1 5550 2200 1 0 0 -1 $EndComp $Comp L C C7 U 1 1 4F56CD3B P 5300 2200 F 0 "C7" H 5350 2300 50 0000 L CNN F 1 "5µF" H 5350 2100 50 0000 L CNN 1 5300 2200 1 0 0 -1 $EndComp $Comp L R R9 U 1 1 4F56CD2D P 4950 1400 F 0 "R9" V 5030 1400 50 0000 C CNN F 1 "330k" V 4950 1400 50 0000 C CNN 1 4950 1400 1 0 0 -1 $EndComp Text Label 10450 4150 0 60 ~ 0 ADC_IN Text Label 1000 5850 2 60 ~ 0 AMP_OUT $Comp L GND #PWR29 U 1 1 4F56CC3C P 9200 6350 F 0 "#PWR29" 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 #PWR25 U 1 1 4F56CC3B P 8000 6350 F 0 "#PWR25" 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 #PWR32 U 1 1 4F56CC34 P 9950 6450 F 0 "#PWR32" 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 #PWR31 U 1 1 4F56CC33 P 9950 5650 F 0 "#PWR31" 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 #PWR20 U 1 1 4F56CBF5 P 6750 5650 F 0 "#PWR20" 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 #PWR21 U 1 1 4F56CBF4 P 6750 6450 F 0 "#PWR21" 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 #PWR12 U 1 1 4F56CBED P 4800 6350 F 0 "#PWR12" 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 #PWR19 U 1 1 4F56CBEC P 6000 6350 F 0 "#PWR19" 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 #PWR5 U 1 1 4F56CB68 P 2800 6350 F 0 "#PWR5" 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 #PWR1 U 1 1 4F56CB66 P 1600 6350 F 0 "#PWR1" 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 4300 2400 0 60 ~ 0 AMP_OUT $Comp L +3.3V #PWR3 U 1 1 4F56CA59 P 2500 1550 F 0 "#PWR3" H 2500 1510 30 0001 C CNN F 1 "+3.3V" H 2500 1660 30 0000 C CNN 1 2500 1550 1 0 0 -1 $EndComp $Comp L GND #PWR11 U 1 1 4F56CA1A P 4100 4100 F 0 "#PWR11" H 4100 4100 30 0001 C CNN F 1 "GND" H 4100 4030 30 0001 C CNN 1 4100 4100 1 0 0 -1 $EndComp $Comp L R R7 U 1 1 4F56C952 P 4100 3800 F 0 "R7" V 4180 3800 50 0000 C CNN F 1 "10k" V 4100 3800 50 0000 C CNN 1 4100 3800 1 0 0 -1 $EndComp $Comp L R R6 U 1 1 4F56C94E P 4100 2700 F 0 "R6" V 4180 2700 50 0000 C CNN F 1 "10k" V 4100 2700 50 0000 C CNN 1 4100 2700 1 0 0 -1 $EndComp $Comp L POT RV1 U 1 1 4F56C949 P 4100 3250 F 0 "RV1" H 4100 3150 50 0000 C CNN F 1 "100k" H 4100 3250 50 0000 C CNN 1 4100 3250 0 -1 -1 0 $EndComp $Comp L GND #PWR2 U 1 1 4F56C942 P 1700 2750 F 0 "#PWR2" H 1700 2750 30 0001 C CNN F 1 "GND" H 1700 2680 30 0001 C CNN 1 1700 2750 1 0 0 -1 $EndComp $Comp L GND #PWR4 U 1 1 4F56C940 P 2500 2900 F 0 "#PWR4" H 2500 2900 30 0001 C CNN F 1 "GND" H 2500 2830 30 0001 C CNN 1 2500 2900 1 0 0 -1 $EndComp $Comp L C C2 U 1 1 4F56C903 P 2050 2200 F 0 "C2" H 2100 2300 50 0000 L CNN F 1 "47µF" H 2100 2100 50 0000 L CNN 1 2050 2200 0 1 1 0 $EndComp $Comp L R R5 U 1 1 4F56C8FE P 2500 2550 F 0 "R5" V 2580 2550 50 0000 C CNN F 1 "470k" V 2500 2550 50 0000 C CNN 1 2500 2550 1 0 0 -1 $EndComp $Comp L R R4 U 1 1 4F56C8E4 P 2500 1850 F 0 "R4" V 2580 1850 50 0000 C CNN F 1 "470k" V 2500 1850 50 0000 C CNN 1 2500 1850 1 0 0 -1 $EndComp $Comp L CONN_2 P1 U 1 1 4F56C8DB P 1300 2500 F 0 "P1" V 1250 2500 40 0000 C CNN F 1 "MIC_IN" V 1350 2500 40 0000 C CNN 1 1300 2500 -1 0 0 1 $EndComp $Comp L C C13 U 1 1 4F56B741 P 8100 1550 F 0 "C13" H 8150 1650 50 0000 L CNN F 1 "100nF" H 8150 1450 50 0000 L CNN 1 8100 1550 0 1 1 0 $EndComp $Comp L GND #PWR28 U 1 1 4F56B73F P 8300 1450 F 0 "#PWR28" H 8300 1450 30 0001 C CNN F 1 "GND" H 8300 1380 30 0001 C CNN 1 8300 1450 -1 0 0 1 $EndComp $Comp L +3.3V #PWR24 U 1 1 4F56B73C P 7900 1450 F 0 "#PWR24" H 7900 1410 30 0001 C CNN F 1 "+3.3V" H 7900 1560 30 0000 C CNN 1 7900 1450 1 0 0 -1 $EndComp $Comp L PIC16F1847SO U3 U 1 1 4F56B72F P 8100 2300 F 0 "U3" H 8100 2350 60 0000 C CNN F 1 "PIC16F1847SO" H 8100 2250 60 0000 C CNN 1 8100 2300 1 0 0 -1 $EndComp $Comp L GND #PWR7 U 1 1 4F56B6FA P 3350 2800 F 0 "#PWR7" H 3350 2800 30 0001 C CNN F 1 "GND" H 3350 2730 30 0001 C CNN 1 3350 2800 1 0 0 -1 $EndComp $Comp L GND #PWR9 U 1 1 4F56B6F7 P 3550 6450 F 0 "#PWR9" 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 #PWR8 U 1 1 4F56B6E8 P 3550 5650 F 0 "#PWR8" 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 #PWR6 U 1 1 4F56B6E5 P 3350 2000 F 0 "#PWR6" H 3350 1960 30 0001 C CNN F 1 "+3.3V" H 3350 2110 30 0000 C CNN 1 3350 2000 1 0 0 -1 $EndComp $Comp L MAX9913 U1 U 1 1 4F56B59C P 3350 2400 F 0 "U1" H 3450 2050 60 0000 C CNN F 1 "MAX9913" H 3550 2150 60 0000 C CNN 1 3350 2400 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