EESchema Schematic File Version 2
LIBS:74xgxx
LIBS:74xx
LIBS:ac-dc
LIBS:actel
LIBS:adc-dac
LIBS:Altera
LIBS:analog_devices
LIBS:analog_switches
LIBS:atmel
LIBS:audio
LIBS:brooktre
LIBS:cmos4000
LIBS:cmos_ieee
LIBS:conn
LIBS:contrib
LIBS:cypress
LIBS:dc-dc
LIBS:device
LIBS:digital-audio
LIBS:diode
LIBS:display
LIBS:dsp
LIBS:elec-unifil
LIBS:ESD_Protection
LIBS:ftdi
LIBS:gennum
LIBS:graphic
LIBS:hc11
LIBS:intel
LIBS:interface
LIBS:ir
LIBS:Lattice
LIBS:linear
LIBS:logo
LIBS:maxim
LIBS:memory
LIBS:microchip
LIBS:microchip_dspic33dsc
LIBS:microchip_pic10mcu
LIBS:microchip_pic12mcu
LIBS:microchip_pic16mcu
LIBS:microchip_pic18mcu
LIBS:microchip_pic32mcu
LIBS:microcontrollers
LIBS:motor_drivers
LIBS:motorola
LIBS:msp430
LIBS:nordicsemi
LIBS:nxp_armmcu
LIBS:onsemi
LIBS:opto
LIBS:Oscillators
LIBS:philips
LIBS:power
LIBS:powerint
LIBS:Power_Management
LIBS:references
LIBS:regul
LIBS:relays
LIBS:rfcom
LIBS:sensors
LIBS:silabs
LIBS:siliconi
LIBS:stm8
LIBS:stm32
LIBS:supertex
LIBS:switches
LIBS:texas
LIBS:transf
LIBS:transistors
LIBS:ttl_ieee
LIBS:valves
LIBS:video
LIBS:w_analog
LIBS:w_connectors
LIBS:w_device
LIBS:w_logic
LIBS:w_memory
LIBS:w_microcontrollers
LIBS:w_opto
LIBS:Worldsemi
LIBS:w_relay
LIBS:w_rtx
LIBS:w_transistor
LIBS:w_vacuum
LIBS:Xicor
LIBS:xilinx
LIBS:Zilog
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 BNC P1
U 1 1 5A26C4F0
P 2750 2250
F 0 "P1" H 2900 2100 50  0000 C CNN
F 1 "INPUT" H 2750 2400 50  0000 C CNN
F 2 "" H 2750 2250 50  0000 C CNN
F 3 "" H 2750 2250 50  0000 C CNN
	1    2750 2250
	-1   0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 5A26C581
P 3150 2450
F 0 "R1" V 3230 2450 50  0000 C CNN
F 1 "100k" V 3150 2450 50  0000 C CNN
F 2 "" V 3080 2450 50  0000 C CNN
F 3 "" H 3150 2450 50  0000 C CNN
	1    3150 2450
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 5A26C5A4
P 3350 2250
F 0 "R2" V 3430 2250 50  0000 C CNN
F 1 "1k" V 3350 2250 50  0000 C CNN
F 2 "" V 3280 2250 50  0000 C CNN
F 3 "" H 3350 2250 50  0000 C CNN
	1    3350 2250
	0    1    1    0   
$EndComp
$Comp
L ZENERsmall D1
U 1 1 5A26C65F
P 3550 2400
F 0 "D1" H 3500 2500 50  0000 C CNN
F 1 "5V1" H 3500 2300 50  0000 C CNN
F 2 "" H 3550 2400 50  0000 C CNN
F 3 "" H 3550 2400 50  0000 C CNN
	1    3550 2400
	0    -1   -1   0   
$EndComp
$Comp
L ZENERsmall D2
U 1 1 5A26C6AA
P 3550 2600
F 0 "D2" H 3600 2700 50  0000 C CNN
F 1 "5V1" H 3600 2500 50  0000 C CNN
F 2 "" H 3550 2600 50  0000 C CNN
F 3 "" H 3550 2600 50  0000 C CNN
	1    3550 2600
	0    1    1    0   
$EndComp
$Comp
L GND #PWR01
U 1 1 5A26C6D2
P 3550 2700
F 0 "#PWR01" H 3550 2450 50  0001 C CNN
F 1 "GND" H 3550 2550 50  0000 C CNN
F 2 "" H 3550 2700 50  0000 C CNN
F 3 "" H 3550 2700 50  0000 C CNN
	1    3550 2700
	1    0    0    -1  
$EndComp
$Comp
L C C1
U 1 1 5A26C721
P 3950 2500
F 0 "C1" H 3975 2600 50  0000 L CNN
F 1 "470n" H 3975 2400 50  0000 L CNN
F 2 "" H 3988 2350 50  0000 C CNN
F 3 "" H 3950 2500 50  0000 C CNN
	1    3950 2500
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 5A26C746
P 3750 2250
F 0 "R3" V 3830 2250 50  0000 C CNN
F 1 "22k" V 3750 2250 50  0000 C CNN
F 2 "" V 3680 2250 50  0000 C CNN
F 3 "" H 3750 2250 50  0000 C CNN
	1    3750 2250
	0    1    1    0   
$EndComp
$Comp
L GND #PWR02
U 1 1 5A26C9C4
P 3150 2700
F 0 "#PWR02" H 3150 2450 50  0001 C CNN
F 1 "GND" H 3150 2550 50  0000 C CNN
F 2 "" H 3150 2700 50  0000 C CNN
F 3 "" H 3150 2700 50  0000 C CNN
	1    3150 2700
	1    0    0    -1  
$EndComp
$Comp
L OPA177 U1
U 1 1 5A26C7F5
P 4600 2350
F 0 "U1" H 4300 2550 50  0000 C CNN
F 1 "OPA177" H 4550 2350 50  0000 C CNN
F 2 "" H 4500 2250 50  0000 C CNN
F 3 "" H 4600 2350 50  0000 C CNN
	1    4600 2350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR03
U 1 1 5A26C982
P 3950 2700
F 0 "#PWR03" H 3950 2450 50  0001 C CNN
F 1 "GND" H 3950 2550 50  0000 C CNN
F 2 "" H 3950 2700 50  0000 C CNN
F 3 "" H 3950 2700 50  0000 C CNN
	1    3950 2700
	1    0    0    -1  
$EndComp
$Comp
L R R4
U 1 1 5A26CA07
P 4050 3200
F 0 "R4" V 4130 3200 50  0000 C CNN
F 1 "20k" V 4050 3200 50  0000 C CNN
F 2 "" V 3980 3200 50  0000 C CNN
F 3 "" H 4050 3200 50  0000 C CNN
	1    4050 3200
	0    1    1    0   
$EndComp
$Comp
L R R5
U 1 1 5A26CA58
P 4600 3100
F 0 "R5" V 4550 3250 50  0000 C CNN
F 1 "180k" V 4600 3100 50  0000 C CNN
F 2 "" V 4530 3100 50  0000 C CNN
F 3 "" H 4600 3100 50  0000 C CNN
	1    4600 3100
	0    1    1    0   
$EndComp
$Comp
L C C2
U 1 1 5A26CAE2
P 4600 3300
F 0 "C2" V 4650 3400 50  0000 L CNN
F 1 "220n" V 4650 3050 50  0000 L CNN
F 2 "" H 4638 3150 50  0000 C CNN
F 3 "" H 4600 3300 50  0000 C CNN
	1    4600 3300
	0    1    1    0   
$EndComp
$Comp
L C_Small C4
U 1 1 5A26CB62
P 4650 2700
F 0 "C4" V 4750 2750 50  0000 L CNN
F 1 "100n" V 4550 2600 50  0000 L CNN
F 2 "" H 4650 2700 50  0000 C CNN
F 3 "" H 4650 2700 50  0000 C CNN
	1    4650 2700
	0    1    1    0   
$EndComp
$Comp
L GND #PWR04
U 1 1 5A26CC13
P 4750 2700
F 0 "#PWR04" H 4750 2450 50  0001 C CNN
F 1 "GND" H 4750 2550 50  0000 C CNN
F 2 "" H 4750 2700 50  0000 C CNN
F 3 "" H 4750 2700 50  0000 C CNN
	1    4750 2700
	0    -1   -1   0   
$EndComp
NoConn ~ 4900 2450
NoConn ~ 4900 2250
NoConn ~ 4900 2150
$Comp
L R R10
U 1 1 5A26CE37
P 5800 2350
F 0 "R10" V 5880 2350 50  0000 C CNN
F 1 "10k" V 5800 2350 50  0000 C CNN
F 2 "" V 5730 2350 50  0000 C CNN
F 3 "" H 5800 2350 50  0000 C CNN
	1    5800 2350
	0    1    1    0   
$EndComp
$Comp
L C C7
U 1 1 5A26CE98
P 6000 2550
F 0 "C7" H 5900 2650 50  0000 L CNN
F 1 "220n" H 6050 2650 50  0000 L CNN
F 2 "" H 6038 2400 50  0000 C CNN
F 3 "" H 6000 2550 50  0000 C CNN
	1    6000 2550
	-1   0    0    1   
$EndComp
$Comp
L R R11
U 1 1 5A26D0A3
P 6300 2550
F 0 "R11" V 6380 2550 50  0000 C CNN
F 1 "RX" V 6300 2550 50  0000 C CNN
F 2 "" V 6230 2550 50  0000 C CNN
F 3 "" H 6300 2550 50  0000 C CNN
	1    6300 2550
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR05
U 1 1 5A26D18D
P 6150 2800
F 0 "#PWR05" H 6150 2550 50  0001 C CNN
F 1 "GND" H 6150 2650 50  0000 C CNN
F 2 "" H 6150 2800 50  0000 C CNN
F 3 "" H 6150 2800 50  0000 C CNN
	1    6150 2800
	1    0    0    -1  
$EndComp
$Comp
L OPA177 U3
U 1 1 5A26D235
P 6900 2450
F 0 "U3" H 6600 2650 50  0000 C CNN
F 1 "OPA177" H 6850 2450 50  0000 C CNN
F 2 "" H 6800 2350 50  0000 C CNN
F 3 "" H 6900 2450 50  0000 C CNN
	1    6900 2450
	1    0    0    -1  
$EndComp
$Comp
L R R13
U 1 1 5A26D32E
P 6950 3150
F 0 "R13" V 7000 3000 50  0000 C CNN
F 1 "27k" V 6950 3150 50  0000 C CNN
F 2 "" V 6880 3150 50  0000 C CNN
F 3 "" H 6950 3150 50  0000 C CNN
	1    6950 3150
	0    -1   -1   0   
$EndComp
$Comp
L C_Small C8
U 1 1 5A26D3BD
P 6950 2800
F 0 "C8" V 6850 2850 50  0000 L CNN
F 1 "100n" V 7050 2750 50  0000 L CNN
F 2 "" H 6950 2800 50  0000 C CNN
F 3 "" H 6950 2800 50  0000 C CNN
	1    6950 2800
	0    1    1    0   
$EndComp
$Comp
L GND #PWR06
U 1 1 5A26D547
P 7050 2800
F 0 "#PWR06" H 7050 2550 50  0001 C CNN
F 1 "GND" H 7050 2650 50  0000 C CNN
F 2 "" H 7050 2800 50  0000 C CNN
F 3 "" H 7050 2800 50  0000 C CNN
	1    7050 2800
	0    -1   -1   0   
$EndComp
$Comp
L C C9
U 1 1 5A26D71B
P 6950 3350
F 0 "C9" V 6900 3150 50  0000 L CNN
F 1 "220n" V 6900 3450 50  0000 L CNN
F 2 "" H 6988 3200 50  0000 C CNN
F 3 "" H 6950 3350 50  0000 C CNN
	1    6950 3350
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3500 2250 3550 2250
Wire Wire Line
	3550 2250 3600 2250
Wire Wire Line
	3550 2250 3550 2300
Connection ~ 3550 2250
Wire Wire Line
	3150 2300 3150 2250
Wire Wire Line
	2900 2250 3150 2250
Wire Wire Line
	3150 2250 3200 2250
Connection ~ 3150 2250
Wire Wire Line
	2750 2650 3150 2650
Wire Wire Line
	3150 2600 3150 2650
Wire Wire Line
	3150 2650 3150 2700
Connection ~ 3150 2650
Wire Wire Line
	3900 2250 3950 2250
Wire Wire Line
	3950 2250 4300 2250
Wire Wire Line
	3950 2250 3950 2350
Wire Wire Line
	3950 2700 3950 2650
Connection ~ 3950 2250
Wire Wire Line
	4500 2650 4500 2700
Wire Wire Line
	4500 2700 4500 2750
Wire Wire Line
	4500 2700 4550 2700
Wire Wire Line
	4450 3100 4400 3100
Wire Wire Line
	4400 3100 4400 3200
Wire Wire Line
	4400 3200 4400 3300
Wire Wire Line
	4400 3300 4450 3300
Wire Wire Line
	4200 3200 4250 3200
Wire Wire Line
	4250 3200 4400 3200
Wire Wire Line
	4250 2450 4250 3200
Wire Wire Line
	4250 2450 4300 2450
Connection ~ 4400 3200
Wire Wire Line
	4750 3100 4800 3100
Wire Wire Line
	4800 3100 4800 3200
Wire Wire Line
	4800 3200 4800 3300
Wire Wire Line
	4800 3300 4750 3300
Wire Wire Line
	5050 3200 4800 3200
Wire Wire Line
	5050 2350 5050 3200
Wire Wire Line
	4900 2350 5050 2350
Wire Wire Line
	5050 2350 5650 2350
Connection ~ 4800 3200
Wire Wire Line
	5950 2350 6000 2350
Wire Wire Line
	6000 2350 6300 2350
Wire Wire Line
	6300 2350 6600 2350
Wire Wire Line
	6000 2350 6000 2400
Wire Wire Line
	6300 2350 6300 2400
Connection ~ 6000 2350
Wire Wire Line
	6000 2700 6000 2750
Wire Wire Line
	6000 2750 6150 2750
Wire Wire Line
	6150 2750 6300 2750
Wire Wire Line
	6300 2750 6300 2700
Wire Wire Line
	6150 2800 6150 2750
Connection ~ 6150 2750
Connection ~ 5050 2350
Connection ~ 6300 2350
Wire Wire Line
	6800 2750 6800 2800
Wire Wire Line
	6800 2800 6800 2850
Wire Wire Line
	6800 2800 6850 2800
Wire Wire Line
	6550 2550 6550 3250
Wire Wire Line
	6550 2550 6600 2550
Wire Wire Line
	6750 3150 6800 3150
Wire Wire Line
	7150 3150 7100 3150
Wire Wire Line
	6750 3150 6750 3250
Wire Wire Line
	6750 3250 6750 3350
Wire Wire Line
	6750 3350 6800 3350
Wire Wire Line
	7150 3350 7100 3350
Wire Wire Line
	7150 3150 7150 3250
Wire Wire Line
	7150 3250 7150 3350
Wire Wire Line
	7300 3250 7150 3250
Connection ~ 7150 3250
Wire Wire Line
	6450 3250 6550 3250
Wire Wire Line
	6550 3250 6750 3250
Connection ~ 6750 3250
$Comp
L R R12
U 1 1 5A26E247
P 6300 3250
F 0 "R12" V 6380 3250 50  0000 C CNN
F 1 "2k7" V 6300 3250 50  0000 C CNN
F 2 "" V 6230 3250 50  0000 C CNN
F 3 "" H 6300 3250 50  0000 C CNN
	1    6300 3250
	0    1    1    0   
$EndComp
Connection ~ 6550 3250
$Comp
L POT RV1
U 1 1 5A26E36E
P 5950 3250
F 0 "RV1" H 5950 3170 50  0000 C CNN
F 1 "50k" H 5950 3250 50  0000 C CNN
F 2 "" H 5950 3250 50  0000 C CNN
F 3 "" H 5950 3250 50  0000 C CNN
	1    5950 3250
	1    0    0    -1  
$EndComp
Wire Wire Line
	5650 3250 5750 3250
Wire Wire Line
	5750 3250 5800 3250
Wire Wire Line
	5750 3250 5750 3050
Wire Wire Line
	5750 3050 5950 3050
Wire Wire Line
	5950 3050 5950 3100
Wire Wire Line
	6100 3250 6150 3250
Connection ~ 5750 3250
$Comp
L GND #PWR07
U 1 1 5A26E5FD
P 5450 3250
F 0 "#PWR07" H 5450 3000 50  0001 C CNN
F 1 "GND" H 5450 3100 50  0000 C CNN
F 2 "" H 5450 3250 50  0000 C CNN
F 3 "" H 5450 3250 50  0000 C CNN
	1    5450 3250
	0    1    1    0   
$EndComp
$Comp
L CONN_01X02 P2
U 1 1 5A26E467
P 5600 2950
F 0 "P2" H 5600 3100 50  0000 C CNN
F 1 "GAIN_ADJ" V 5700 2950 50  0000 C CNN
F 2 "" H 5600 2950 50  0000 C CNN
F 3 "" H 5600 2950 50  0000 C CNN
	1    5600 2950
	0    1    -1   0   
$EndComp
Wire Wire Line
	7300 2350 7300 3250
Wire Wire Line
	7300 3250 7300 3800
Wire Wire Line
	7200 2350 7300 2350
Wire Wire Line
	7300 2350 7400 2350
$Comp
L R R14
U 1 1 5A26E913
P 7550 2350
F 0 "R14" V 7630 2350 50  0000 C CNN
F 1 "100" V 7550 2350 50  0000 C CNN
F 2 "" V 7480 2350 50  0000 C CNN
F 3 "" H 7550 2350 50  0000 C CNN
	1    7550 2350
	0    1    1    0   
$EndComp
Connection ~ 7300 2350
$Comp
L ZENERsmall D4
U 1 1 5A26EA1B
P 7750 2500
F 0 "D4" H 7800 2400 50  0000 C CNN
F 1 "5V1" H 7750 2600 50  0000 C CNN
F 2 "" H 7750 2500 50  0000 C CNN
F 3 "" H 7750 2500 50  0000 C CNN
	1    7750 2500
	0    1    1    0   
$EndComp
Wire Wire Line
	7700 2350 7750 2350
Wire Wire Line
	7750 2350 8100 2350
Wire Wire Line
	7750 2350 7750 2400
Connection ~ 7750 2350
$Comp
L GND #PWR08
U 1 1 5A26EC3A
P 7750 2700
F 0 "#PWR08" H 7750 2450 50  0001 C CNN
F 1 "GND" H 7750 2550 50  0000 C CNN
F 2 "" H 7750 2700 50  0000 C CNN
F 3 "" H 7750 2700 50  0000 C CNN
	1    7750 2700
	1    0    0    -1  
$EndComp
$Comp
L BNC P3
U 1 1 5A26ED35
P 8250 2350
F 0 "P3" H 8350 2200 50  0000 C CNN
F 1 "OUTPUT (0-5V)" H 8250 2500 50  0000 C CNN
F 2 "" H 8250 2350 50  0000 C CNN
F 3 "" H 8250 2350 50  0000 C CNN
	1    8250 2350
	1    0    0    -1  
$EndComp
Wire Wire Line
	2750 2450 2750 2650
Wire Wire Line
	7750 2600 7750 2650
Wire Wire Line
	7750 2650 7750 2700
Wire Wire Line
	7750 2650 8250 2650
Wire Wire Line
	8250 2650 8250 2550
Connection ~ 7750 2650
$Comp
L +8V #PWR09
U 1 1 5A26F5A2
P 4500 1950
F 0 "#PWR09" H 4500 1800 50  0001 C CNN
F 1 "+8V" H 4500 2090 50  0000 C CNN
F 2 "" H 4500 1950 50  0000 C CNN
F 3 "" H 4500 1950 50  0000 C CNN
	1    4500 1950
	1    0    0    -1  
$EndComp
$Comp
L -8V #PWR8
U 1 1 5A26F61A
P 4500 2750
F 0 "#PWR8" H 4500 2850 50  0001 C CNN
F 1 "-8V" H 4500 2900 50  0000 C CNN
F 2 "" H 4500 2750 50  0000 C CNN
F 3 "" H 4500 2750 50  0000 C CNN
	1    4500 2750
	-1   0    0    1   
$EndComp
Connection ~ 4500 2700
$Comp
L +8V #PWR010
U 1 1 5A26F7A6
P 6800 2150
F 0 "#PWR010" H 6800 2000 50  0001 C CNN
F 1 "+8V" H 6800 2290 50  0000 C CNN
F 2 "" H 6800 2150 50  0000 C CNN
F 3 "" H 6800 2150 50  0000 C CNN
	1    6800 2150
	1    0    0    -1  
$EndComp
$Comp
L -8V #PWR21
U 1 1 5A26F7FC
P 6800 2850
F 0 "#PWR21" H 6800 2950 50  0001 C CNN
F 1 "-8V" H 6800 3000 50  0000 C CNN
F 2 "" H 6800 2850 50  0000 C CNN
F 3 "" H 6800 2850 50  0000 C CNN
	1    6800 2850
	-1   0    0    1   
$EndComp
Connection ~ 6800 2800
Connection ~ 7300 3250
$Comp
L LM393 U2
U 1 1 5A26F9BB
P 5700 4500
F 0 "U2" H 5850 4650 50  0000 C CNN
F 1 "LM393" H 5950 4350 50  0000 C CNN
F 2 "" H 5700 4500 50  0000 C CNN
F 3 "" H 5700 4500 50  0000 C CNN
	1    5700 4500
	1    0    0    1   
$EndComp
$Comp
L LM393 U2
U 2 1 5A26FA9A
P 5850 6400
F 0 "U2" H 6000 6550 50  0000 C CNN
F 1 "LM393" H 6100 6250 50  0000 C CNN
F 2 "" H 5850 6400 50  0000 C CNN
F 3 "" H 5850 6400 50  0000 C CNN
	2    5850 6400
	1    0    0    -1  
$EndComp
Wire Wire Line
	5650 3150 5650 3250
Wire Wire Line
	5550 3150 5550 3250
Wire Wire Line
	5550 3250 5450 3250
$Comp
L R R8
U 1 1 5A2700C8
P 5300 4200
F 0 "R8" V 5380 4200 50  0000 C CNN
F 1 "2k7" V 5300 4200 50  0000 C CNN
F 2 "" V 5230 4200 50  0000 C CNN
F 3 "" H 5300 4200 50  0000 C CNN
	1    5300 4200
	-1   0    0    1   
$EndComp
Wire Wire Line
	5300 4350 5300 4400
Wire Wire Line
	5300 4400 5400 4400
$Comp
L C_Small C5
U 1 1 5A270604
P 5750 4100
F 0 "C5" V 5850 4100 50  0000 L CNN
F 1 "100n" V 5650 4000 50  0000 L CNN
F 2 "" H 5750 4100 50  0000 C CNN
F 3 "" H 5750 4100 50  0000 C CNN
	1    5750 4100
	0    1    1    0   
$EndComp
$Comp
L GND #PWR011
U 1 1 5A27060A
P 5850 4100
F 0 "#PWR011" H 5850 3850 50  0001 C CNN
F 1 "GND" H 5850 3950 50  0000 C CNN
F 2 "" H 5850 4100 50  0000 C CNN
F 3 "" H 5850 4100 50  0000 C CNN
	1    5850 4100
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5600 4100 5650 4100
$Comp
L -8V #PWR15
U 1 1 5A270612
P 5600 4050
F 0 "#PWR15" H 5600 4150 50  0001 C CNN
F 1 "-8V" H 5600 4200 50  0000 C CNN
F 2 "" H 5600 4050 50  0000 C CNN
F 3 "" H 5600 4050 50  0000 C CNN
	1    5600 4050
	1    0    0    -1  
$EndComp
Connection ~ 5600 4100
Wire Wire Line
	5600 4050 5600 4100
Wire Wire Line
	5600 4100 5600 4200
NoConn ~ 7200 2250
NoConn ~ 7200 2450
NoConn ~ 7200 2550
$Comp
L C_Small C3
U 1 1 5A27161E
P 4650 2000
F 0 "C3" V 4700 2050 50  0000 L CNN
F 1 "100n" V 4550 1950 50  0000 L CNN
F 2 "" H 4650 2000 50  0000 C CNN
F 3 "" H 4650 2000 50  0000 C CNN
	1    4650 2000
	0    1    1    0   
$EndComp
Wire Wire Line
	4550 2000 4500 2000
Wire Wire Line
	4500 1950 4500 2000
Wire Wire Line
	4500 2000 4500 2050
Connection ~ 4500 2000
$Comp
L GND #PWR012
U 1 1 5A2718ED
P 4750 2000
F 0 "#PWR012" H 4750 1750 50  0001 C CNN
F 1 "GND" H 4750 1850 50  0000 C CNN
F 2 "" H 4750 2000 50  0000 C CNN
F 3 "" H 4750 2000 50  0000 C CNN
	1    4750 2000
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5300 4050 5300 3800
Wire Wire Line
	5300 3800 7300 3800
$Comp
L R R6
U 1 1 5A2721C9
P 5000 4400
F 0 "R6" V 5080 4400 50  0000 C CNN
F 1 "3k3" V 5000 4400 50  0000 C CNN
F 2 "" V 4930 4400 50  0000 C CNN
F 3 "" H 5000 4400 50  0000 C CNN
	1    5000 4400
	1    0    0    -1  
$EndComp
$Comp
L R R7
U 1 1 5A27226A
P 5000 4800
F 0 "R7" V 5080 4800 50  0000 C CNN
F 1 "5k6" V 5000 4800 50  0000 C CNN
F 2 "" V 4930 4800 50  0000 C CNN
F 3 "" H 5000 4800 50  0000 C CNN
	1    5000 4800
	1    0    0    -1  
$EndComp
$Comp
L +8V #PWR013
U 1 1 5A272681
P 5600 4900
F 0 "#PWR013" H 5600 4750 50  0001 C CNN
F 1 "+8V" H 5600 5040 50  0000 C CNN
F 2 "" H 5600 4900 50  0000 C CNN
F 3 "" H 5600 4900 50  0000 C CNN
	1    5600 4900
	1    0    0    1   
$EndComp
$Comp
L C_Small C6
U 1 1 5A272687
P 5750 4850
F 0 "C6" V 5800 4900 50  0000 L CNN
F 1 "100n" V 5650 4800 50  0000 L CNN
F 2 "" H 5750 4850 50  0000 C CNN
F 3 "" H 5750 4850 50  0000 C CNN
	1    5750 4850
	0    1    -1   0   
$EndComp
Wire Wire Line
	5650 4850 5600 4850
Wire Wire Line
	5600 4800 5600 4850
Wire Wire Line
	5600 4850 5600 4900
Connection ~ 5600 4850
$Comp
L GND #PWR014
U 1 1 5A272690
P 5850 4850
F 0 "#PWR014" H 5850 4600 50  0001 C CNN
F 1 "GND" H 5850 4700 50  0000 C CNN
F 2 "" H 5850 4850 50  0000 C CNN
F 3 "" H 5850 4850 50  0000 C CNN
	1    5850 4850
	0    -1   1    0   
$EndComp
Wire Wire Line
	5000 4550 5000 4600
Wire Wire Line
	5000 4600 5000 4650
$Comp
L +8V #PWR015
U 1 1 5A272853
P 5000 4250
F 0 "#PWR015" H 5000 4100 50  0001 C CNN
F 1 "+8V" H 5000 4390 50  0000 C CNN
F 2 "" H 5000 4250 50  0000 C CNN
F 3 "" H 5000 4250 50  0000 C CNN
	1    5000 4250
	-1   0    0    -1  
$EndComp
$Comp
L GND #PWR016
U 1 1 5A2728C1
P 5000 4950
F 0 "#PWR016" H 5000 4700 50  0001 C CNN
F 1 "GND" H 5000 4800 50  0000 C CNN
F 2 "" H 5000 4950 50  0000 C CNN
F 3 "" H 5000 4950 50  0000 C CNN
	1    5000 4950
	-1   0    0    -1  
$EndComp
Wire Wire Line
	5000 4600 5250 4600
Wire Wire Line
	5250 4600 5400 4600
Connection ~ 5000 4600
$Comp
L R R9
U 1 1 5A272BF7
P 5450 5250
F 0 "R9" V 5530 5250 50  0000 C CNN
F 1 "27k" V 5450 5250 50  0000 C CNN
F 2 "" V 5380 5250 50  0000 C CNN
F 3 "" H 5450 5250 50  0000 C CNN
	1    5450 5250
	0    1    1    0   
$EndComp
$Comp
L D_Small D3
U 1 1 5A272D8D
P 5800 5250
F 0 "D3" H 5750 5330 50  0000 L CNN
F 1 "1n4001" H 5650 5170 50  0000 L CNN
F 2 "" V 5800 5250 50  0000 C CNN
F 3 "" V 5800 5250 50  0000 C CNN
	1    5800 5250
	-1   0    0    -1  
$EndComp
Wire Wire Line
	5900 5250 6100 5250
Wire Wire Line
	6100 5250 6100 4500
Wire Wire Line
	6000 4500 6100 4500
Wire Wire Line
	6100 4500 8000 4500
Wire Wire Line
	5600 5250 5700 5250
Wire Wire Line
	5300 5250 5250 5250
Wire Wire Line
	5250 5250 5250 4600
Connection ~ 5250 4600
$Comp
L LED D5
U 1 1 5A27312A
P 8000 4300
F 0 "D5" H 8000 4200 50  0000 C CNN
F 1 "SATURATION_LED" H 8000 4450 50  0000 C CNN
F 2 "" H 8000 4300 50  0000 C CNN
F 3 "" H 8000 4300 50  0000 C CNN
	1    8000 4300
	0    1    -1   0   
$EndComp
$Comp
L R R15
U 1 1 5A2731DD
P 7800 4050
F 0 "R15" V 7880 4050 50  0000 C CNN
F 1 "2k7" V 7800 4050 50  0000 C CNN
F 2 "" V 7730 4050 50  0000 C CNN
F 3 "" H 7800 4050 50  0000 C CNN
	1    7800 4050
	0    -1   -1   0   
$EndComp
Connection ~ 6100 4500
$Comp
L +8V #PWR017
U 1 1 5A2735C3
P 7600 4000
F 0 "#PWR017" H 7600 3850 50  0001 C CNN
F 1 "+8V" H 7600 4140 50  0000 C CNN
F 2 "" H 7600 4000 50  0000 C CNN
F 3 "" H 7600 4000 50  0000 C CNN
	1    7600 4000
	-1   0    0    -1  
$EndComp
Wire Wire Line
	8000 4100 8000 4050
Wire Wire Line
	8000 4050 7950 4050
Wire Wire Line
	7600 4000 7600 4050
Wire Wire Line
	7600 4050 7650 4050
Wire Wire Line
	5550 6300 5450 6300
Wire Wire Line
	5450 6300 5450 6500
Wire Wire Line
	5450 6500 5450 6550
Wire Wire Line
	5450 6500 5550 6500
$Comp
L GND #PWR018
U 1 1 5A274D3B
P 5450 6550
F 0 "#PWR018" H 5450 6300 50  0001 C CNN
F 1 "GND" H 5450 6400 50  0000 C CNN
F 2 "" H 5450 6550 50  0000 C CNN
F 3 "" H 5450 6550 50  0000 C CNN
	1    5450 6550
	1    0    0    -1  
$EndComp
Connection ~ 5450 6500
NoConn ~ 5750 6100
NoConn ~ 5750 6700
NoConn ~ 6150 6400
$Comp
L CONN_01X01 P4
U 1 1 5A275BB2
P 2800 4050
F 0 "P4" H 2800 4150 50  0000 C CNN
F 1 "+8" V 2900 4050 50  0000 C CNN
F 2 "" H 2800 4050 50  0000 C CNN
F 3 "" H 2800 4050 50  0000 C CNN
	1    2800 4050
	-1   0    0    -1  
$EndComp
$Comp
L CONN_01X01 P5
U 1 1 5A275C4F
P 2800 4350
F 0 "P5" H 2800 4450 50  0000 C CNN
F 1 "-8" V 2900 4350 50  0000 C CNN
F 2 "" H 2800 4350 50  0000 C CNN
F 3 "" H 2800 4350 50  0000 C CNN
	1    2800 4350
	-1   0    0    -1  
$EndComp
$Comp
L CONN_01X01 P6
U 1 1 5A275CE2
P 2800 4650
F 0 "P6" H 2800 4750 50  0000 C CNN
F 1 "GND" V 2900 4650 50  0000 C CNN
F 2 "" H 2800 4650 50  0000 C CNN
F 3 "" H 2800 4650 50  0000 C CNN
	1    2800 4650
	-1   0    0    -1  
$EndComp
$Comp
L R R16
U 1 1 5A275E4B
P 3150 4050
F 0 "R16" V 3230 4050 50  0000 C CNN
F 1 "10" V 3150 4050 50  0000 C CNN
F 2 "" V 3080 4050 50  0000 C CNN
F 3 "" H 3150 4050 50  0000 C CNN
	1    3150 4050
	0    1    1    0   
$EndComp
$Comp
L R R17
U 1 1 5A275FB0
P 3150 4350
F 0 "R17" V 3230 4350 50  0000 C CNN
F 1 "10" V 3150 4350 50  0000 C CNN
F 2 "" V 3080 4350 50  0000 C CNN
F 3 "" H 3150 4350 50  0000 C CNN
	1    3150 4350
	0    1    1    0   
$EndComp
$Comp
L CP_Small C10
U 1 1 5A276093
P 3450 4500
F 0 "C10" H 3460 4570 50  0000 L CNN
F 1 "22u" H 3460 4420 50  0000 L CNN
F 2 "" H 3450 4500 50  0000 C CNN
F 3 "" H 3450 4500 50  0000 C CNN
	1    3450 4500
	1    0    0    1   
$EndComp
$Comp
L CP_Small C11
U 1 1 5A276151
P 4050 4500
F 0 "C11" H 4060 4570 50  0000 L CNN
F 1 "22u" H 4060 4420 50  0000 L CNN
F 2 "" H 4050 4500 50  0000 C CNN
F 3 "" H 4050 4500 50  0000 C CNN
	1    4050 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	3450 4300 3450 4350
Wire Wire Line
	3450 4350 3450 4400
Wire Wire Line
	3300 4350 3450 4350
Wire Wire Line
	3450 4350 3750 4350
Wire Wire Line
	4050 4000 4050 4050
Wire Wire Line
	4050 4050 4050 4400
Wire Wire Line
	3300 4050 3450 4050
Wire Wire Line
	3450 4050 4050 4050
Wire Wire Line
	3450 4600 3450 4650
Wire Wire Line
	3450 4650 3450 4700
Wire Wire Line
	3000 4650 3450 4650
Wire Wire Line
	3450 4650 3750 4650
Wire Wire Line
	3750 4650 4050 4650
Wire Wire Line
	4050 4650 4050 4600
Connection ~ 3450 4650
$Comp
L GND #PWR019
U 1 1 5A276C0A
P 3450 4700
F 0 "#PWR019" H 3450 4450 50  0001 C CNN
F 1 "GND" H 3450 4550 50  0000 C CNN
F 2 "" H 3450 4700 50  0000 C CNN
F 3 "" H 3450 4700 50  0000 C CNN
	1    3450 4700
	1    0    0    -1  
$EndComp
$Comp
L +8V #PWR020
U 1 1 5A2771AF
P 4050 4000
F 0 "#PWR020" H 4050 3850 50  0001 C CNN
F 1 "+8V" H 4050 4140 50  0000 C CNN
F 2 "" H 4050 4000 50  0000 C CNN
F 3 "" H 4050 4000 50  0000 C CNN
	1    4050 4000
	1    0    0    -1  
$EndComp
Connection ~ 4050 4050
$Comp
L -8V #PWR2
U 1 1 5A2772C0
P 3450 4300
F 0 "#PWR2" H 3450 4400 50  0001 C CNN
F 1 "-8V" H 3450 4450 50  0000 C CNN
F 2 "" H 3450 4300 50  0000 C CNN
F 3 "" H 3450 4300 50  0000 C CNN
	1    3450 4300
	1    0    0    -1  
$EndComp
$Comp
L PWR_FLAG #FLG021
U 1 1 5A2778A9
P 3450 3950
F 0 "#FLG021" H 3450 4045 50  0001 C CNN
F 1 "PWR_FLAG" H 3450 4130 50  0000 C CNN
F 2 "" H 3450 3950 50  0000 C CNN
F 3 "" H 3450 3950 50  0000 C CNN
	1    3450 3950
	1    0    0    -1  
$EndComp
Wire Wire Line
	3450 3950 3450 4050
Connection ~ 3450 4050
$Comp
L PWR_FLAG #FLG022
U 1 1 5A277BFD
P 3750 4300
F 0 "#FLG022" H 3750 4395 50  0001 C CNN
F 1 "PWR_FLAG" H 3750 4480 50  0000 C CNN
F 2 "" H 3750 4300 50  0000 C CNN
F 3 "" H 3750 4300 50  0000 C CNN
	1    3750 4300
	1    0    0    -1  
$EndComp
Wire Wire Line
	3750 4350 3750 4300
Connection ~ 3450 4350
$Comp
L PWR_FLAG #FLG023
U 1 1 5A278544
P 3750 4700
F 0 "#FLG023" H 3750 4795 50  0001 C CNN
F 1 "PWR_FLAG" H 3750 4880 50  0000 C CNN
F 2 "" H 3750 4700 50  0000 C CNN
F 3 "" H 3750 4700 50  0000 C CNN
	1    3750 4700
	1    0    0    1   
$EndComp
Wire Wire Line
	3750 4700 3750 4650
Connection ~ 3750 4650
Connection ~ 4250 3200
$Comp
L GND #PWR024
U 1 1 5A278E18
P 3900 3200
F 0 "#PWR024" H 3900 2950 50  0001 C CNN
F 1 "GND" H 3900 3050 50  0000 C CNN
F 2 "" H 3900 3200 50  0000 C CNN
F 3 "" H 3900 3200 50  0000 C CNN
	1    3900 3200
	0    1    1    0   
$EndComp
Text Notes 2850 5100 0    60   ~ 0
POWER - Symmetric 8V\n
Wire Notes Line
	2550 5200 4250 5200
Wire Notes Line
	4250 5200 4250 3650
Wire Notes Line
	4250 3650 2550 3650
Wire Notes Line
	2550 3650 2550 5200
Wire Notes Line
	5150 1700 5150 3600
Wire Notes Line
	3050 1700 3050 3600
Wire Notes Line
	3050 1700 5150 1700
Text Notes 3800 3550 0    60   ~ 0
10x Amplifier\n
Wire Notes Line
	3050 3600 5150 3600
Text Notes 5650 3600 0    60   ~ 0
1-10x 2nd Stage Amplifier
Wire Notes Line
	5200 1950 5200 3650
Wire Notes Line
	5200 3650 7900 3650
Wire Notes Line
	7900 3650 7900 1950
Wire Notes Line
	7900 1950 5200 1950
Wire Notes Line
	4850 3700 8250 3700
Text Notes 6100 5550 0    60   ~ 0
Saturation Indicator
Wire Notes Line
	8250 3700 8250 5600
Wire Notes Line
	8250 5600 4850 5600
Wire Notes Line
	4850 5600 4850 3700
$EndSCHEMATC