EESchema Schematic File Version 2
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
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:power
LIBS:eSim_Plot
LIBS:transistors
LIBS:conn
LIBS:eSim_User
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:eSim_Analog
LIBS:eSim_Devices
LIBS:eSim_Digital
LIBS:eSim_Hybrid
LIBS:eSim_Miscellaneous
LIBS:eSim_Power
LIBS:eSim_Sources
LIBS:eSim_Subckt
LIBS:eSim_Nghdl
LIBS:eSim_Ngveri
LIBS:AD_620-cache
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L lm_741 X1
U 1 1 62A60F4C
P 5600 3650
F 0 "X1" H 5400 3650 60  0000 C CNN
F 1 "lm_741" H 5500 3400 60  0000 C CNN
F 2 "" H 5600 3650 60  0000 C CNN
F 3 "" H 5600 3650 60  0000 C CNN
	1    5600 3650
	1    0    0    1   
$EndComp
$Comp
L lm_741 X3
U 1 1 62A60F4D
P 8250 4800
F 0 "X3" H 8050 4800 60  0000 C CNN
F 1 "lm_741" H 8150 4550 60  0000 C CNN
F 2 "" H 8250 4800 60  0000 C CNN
F 3 "" H 8250 4800 60  0000 C CNN
	1    8250 4800
	1    0    0    -1  
$EndComp
$Comp
L lm_741 X2
U 1 1 62A60F4E
P 5600 5700
F 0 "X2" H 5400 5700 60  0000 C CNN
F 1 "lm_741" H 5500 5450 60  0000 C CNN
F 2 "" H 5600 5700 60  0000 C CNN
F 3 "" H 5600 5700 60  0000 C CNN
	1    5600 5700
	1    0    0    -1  
$EndComp
$Comp
L resistor R11
U 1 1 62A60F4F
P 7100 4700
F 0 "R11" H 7150 4830 50  0000 C CNN
F 1 "10k" H 7150 4650 50  0000 C CNN
F 2 "" H 7150 4680 30  0000 C CNN
F 3 "" V 7150 4750 30  0000 C CNN
	1    7100 4700
	1    0    0    -1  
$EndComp
$Comp
L resistor R12
U 1 1 62A60F50
P 7100 4950
F 0 "R12" H 7150 5080 50  0000 C CNN
F 1 "10k" H 7150 4900 50  0000 C CNN
F 2 "" H 7150 4930 30  0000 C CNN
F 3 "" V 7150 5000 30  0000 C CNN
	1    7100 4950
	1    0    0    -1  
$EndComp
$Comp
L resistor R21
U 1 1 62A60F51
P 8350 4050
F 0 "R21" H 8400 4180 50  0000 C CNN
F 1 "11.11k" H 8400 4000 50  0000 C CNN
F 2 "" H 8400 4030 30  0000 C CNN
F 3 "" V 8400 4100 30  0000 C CNN
	1    8350 4050
	1    0    0    -1  
$EndComp
$Comp
L resistor R22
U 1 1 62A60F52
P 7600 5750
F 0 "R22" H 7650 5880 50  0000 C CNN
F 1 "11.11k" H 7650 5700 50  0000 C CNN
F 2 "" H 7650 5730 30  0000 C CNN
F 3 "" V 7650 5800 30  0000 C CNN
	1    7600 5750
	0    1    1    0   
$EndComp
$Comp
L resistor R31
U 1 1 62A60F53
P 6250 4150
F 0 "R31" H 6300 4280 50  0000 C CNN
F 1 "24.7k" H 6300 4100 50  0000 C CNN
F 2 "" H 6300 4130 30  0000 C CNN
F 3 "" V 6300 4200 30  0000 C CNN
	1    6250 4150
	0    1    1    0   
$EndComp
$Comp
L resistor R32
U 1 1 62A60F55
P 6250 5300
F 0 "R32" H 6300 5430 50  0000 C CNN
F 1 "24.7k" H 6300 5250 50  0000 C CNN
F 2 "" H 6300 5280 30  0000 C CNN
F 3 "" V 6300 5350 30  0000 C CNN
	1    6250 5300
	0    1    1    0   
$EndComp
Text Label 7300 3400 0    60   ~ 0
vcc
$Comp
L resistor R5
U 1 1 62A60F69
P 7250 3800
F 0 "R5" H 7300 3930 50  0000 C CNN
F 1 "1" H 7300 3750 50  0000 C CNN
F 2 "" H 7300 3780 30  0000 C CNN
F 3 "" V 7300 3850 30  0000 C CNN
	1    7250 3800
	0    1    1    0   
$EndComp
$Comp
L resistor R6
U 1 1 62A60F6A
P 6800 2750
F 0 "R6" H 6850 2880 50  0000 C CNN
F 1 "1" H 6850 2700 50  0000 C CNN
F 2 "" H 6850 2730 30  0000 C CNN
F 3 "" V 6850 2800 30  0000 C CNN
	1    6800 2750
	-1   0    0    1   
$EndComp
$Comp
L resistor R4
U 1 1 62A60F6B
P 6250 4900
F 0 "R4" H 6300 5030 50  0000 C CNN
F 1 "40" H 6300 4850 50  0000 C CNN
F 2 "" H 6300 4880 30  0000 C CNN
F 3 "" V 6300 4950 30  0000 C CNN
	1    6250 4900
	0    1    1    0   
$EndComp
Wire Wire Line
	6150 3650 6150 4050
Wire Wire Line
	6150 4050 6800 4050
Wire Wire Line
	6800 4050 6800 4650
Wire Wire Line
	6800 4650 7000 4650
Connection ~ 6300 4050
Wire Wire Line
	7300 4650 7700 4650
Wire Wire Line
	7300 4900 7700 4900
Wire Wire Line
	7650 5650 7650 4900
Connection ~ 7650 4900
Wire Wire Line
	8250 4000 7600 4000
Wire Wire Line
	7600 4000 7600 4650
Connection ~ 7600 4650
Wire Wire Line
	8800 4800 9400 4800
Wire Wire Line
	8550 4000 9050 4000
Wire Wire Line
	9050 4000 9050 4800
Connection ~ 9050 4800
Wire Wire Line
	5050 3550 3800 3550
Wire Wire Line
	5450 4100 5450 5250
Wire Wire Line
	5450 4350 8100 4350
Wire Wire Line
	4800 3200 5450 3200
Wire Wire Line
	4800 3200 4800 6150
Wire Wire Line
	4800 6150 7200 6150
Wire Wire Line
	8100 5250 7200 5250
Wire Wire Line
	7200 5250 7200 6150
Connection ~ 5450 6150
Wire Wire Line
	7650 5950 7650 6250
Wire Wire Line
	4900 3200 4900 2800
Wire Wire Line
	4900 2800 6600 2800
Connection ~ 4900 3200
Wire Wire Line
	7750 3200 7300 3200
Wire Wire Line
	7300 3200 7300 3700
Wire Wire Line
	7300 4000 7300 4350
Wire Wire Line
	6300 4350 6300 4500
Wire Wire Line
	6300 4700 6300 4800
Wire Wire Line
	6300 5100 6300 5200
Wire Wire Line
	6300 5500 6300 5700
Wire Wire Line
	6150 5700 6800 5700
Wire Wire Line
	6800 5700 6800 4900
Wire Wire Line
	6800 4900 7000 4900
Connection ~ 6300 5700
Wire Wire Line
	5050 3800 5050 4400
Wire Wire Line
	5050 4400 6300 4400
Wire Wire Line
	5050 5550 5050 5200
Wire Wire Line
	5050 5200 6300 5200
Connection ~ 5450 4350
Connection ~ 7300 4350
Wire Wire Line
	5050 5800 3800 5800
Wire Wire Line
	6900 2800 7350 2800
Wire Wire Line
	6300 4500 3850 4500
Connection ~ 6300 4400
Wire Wire Line
	6300 4700 3850 4700
Wire Wire Line
	7650 6250 8850 6250
$Comp
L PORT U1
U 1 1 62A61C9F
P 3600 4500
F 0 "U1" H 3650 4600 30  0000 C CNN
F 1 "PORT" H 3600 4500 30  0000 C CNN
F 2 "" H 3600 4500 60  0000 C CNN
F 3 "" H 3600 4500 60  0000 C CNN
	1    3600 4500
	1    0    0    -1  
$EndComp
$Comp
L PORT U1
U 2 1 62A61D59
P 3550 5800
F 0 "U1" H 3600 5900 30  0000 C CNN
F 1 "PORT" H 3550 5800 30  0000 C CNN
F 2 "" H 3550 5800 60  0000 C CNN
F 3 "" H 3550 5800 60  0000 C CNN
	2    3550 5800
	1    0    0    -1  
$EndComp
$Comp
L PORT U1
U 3 1 62A61E36
P 3550 3550
F 0 "U1" H 3600 3650 30  0000 C CNN
F 1 "PORT" H 3550 3550 30  0000 C CNN
F 2 "" H 3550 3550 60  0000 C CNN
F 3 "" H 3550 3550 60  0000 C CNN
	3    3550 3550
	1    0    0    -1  
$EndComp
$Comp
L PORT U1
U 4 1 62A61EFF
P 7600 2800
F 0 "U1" H 7650 2900 30  0000 C CNN
F 1 "PORT" H 7600 2800 30  0000 C CNN
F 2 "" H 7600 2800 60  0000 C CNN
F 3 "" H 7600 2800 60  0000 C CNN
	4    7600 2800
	-1   0    0    -1  
$EndComp
$Comp
L PORT U1
U 5 1 62A61FDE
P 9100 6250
F 0 "U1" H 9150 6350 30  0000 C CNN
F 1 "PORT" H 9100 6250 30  0000 C CNN
F 2 "" H 9100 6250 60  0000 C CNN
F 3 "" H 9100 6250 60  0000 C CNN
	5    9100 6250
	-1   0    0    -1  
$EndComp
$Comp
L PORT U1
U 6 1 62A62529
P 9650 4800
F 0 "U1" H 9700 4900 30  0000 C CNN
F 1 "PORT" H 9650 4800 30  0000 C CNN
F 2 "" H 9650 4800 60  0000 C CNN
F 3 "" H 9650 4800 60  0000 C CNN
	6    9650 4800
	-1   0    0    -1  
$EndComp
$Comp
L PORT U1
U 7 1 62A625D2
P 8000 3200
F 0 "U1" H 8050 3300 30  0000 C CNN
F 1 "PORT" H 8000 3200 30  0000 C CNN
F 2 "" H 8000 3200 60  0000 C CNN
F 3 "" H 8000 3200 60  0000 C CNN
	7    8000 3200
	-1   0    0    -1  
$EndComp
$Comp
L PORT U1
U 8 1 62A62687
P 3600 4700
F 0 "U1" H 3650 4800 30  0000 C CNN
F 1 "PORT" H 3600 4700 30  0000 C CNN
F 2 "" H 3600 4700 60  0000 C CNN
F 3 "" H 3600 4700 60  0000 C CNN
	8    3600 4700
	1    0    0    -1  
$EndComp
NoConn ~ 5550 4050
NoConn ~ 5650 4000
NoConn ~ 5650 5350
NoConn ~ 5550 5300
NoConn ~ 8300 4450
NoConn ~ 8200 4400
$EndSCHEMATC