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
LIBS:V_AMP-cache
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "10x to 100x Precision Pre-Amplifier for Generic Sensors "
Date "2017-12-18"
Rev "1"
Comp "LAPMA - IF/UFRGS"
Comment1 "All resistors are 1/8W, except R16 and R17, 1W"
Comment2 "There's a saturation indicator for output higher than 5V"
Comment3 "The gain adjust must be set for a range in 0 to 5V output voltage"
Comment4 "Designed by Alisson Claudino"
$EndDescr
$Comp
L BNC P1
U 1 1 5A26C4F0
P 2800 4400
F 0 "P1" H 2950 4250 50  0000 C CNN
F 1 "INPUT" H 2800 4550 50  0000 C CNN
F 2 "Connectors:bnc-ci" H 2800 4400 50  0001 C CNN
F 3 "" H 2800 4400 50  0000 C CNN
	1    2800 4400
	-1   0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 5A26C581
P 3200 4650
F 0 "R1" V 3280 4650 50  0000 C CNN
F 1 "100k" V 3200 4650 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 3130 4650 50  0001 C CNN
F 3 "" H 3200 4650 50  0000 C CNN
	1    3200 4650
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 5A26C5A4
P 3400 4400
F 0 "R2" V 3480 4400 50  0000 C CNN
F 1 "1k" V 3400 4400 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 3330 4400 50  0001 C CNN
F 3 "" H 3400 4400 50  0000 C CNN
	1    3400 4400
	0    1    1    0   
$EndComp
$Comp
L ZENERsmall D1
U 1 1 5A26C65F
P 3600 4550
F 0 "D1" H 3550 4650 50  0000 C CNN
F 1 "5V1" H 3550 4450 50  0000 C CNN
F 2 "Diodes_THT:D_DO-41_SOD81_P7.62mm_Horizontal" H 3600 4550 50  0001 C CNN
F 3 "" H 3600 4550 50  0000 C CNN
	1    3600 4550
	0    -1   -1   0   
$EndComp
$Comp
L ZENERsmall D2
U 1 1 5A26C6AA
P 3600 4800
F 0 "D2" H 3650 4900 50  0000 C CNN
F 1 "5V1" H 3650 4700 50  0000 C CNN
F 2 "Diodes_THT:D_DO-41_SOD81_P7.62mm_Horizontal" H 3600 4800 50  0001 C CNN
F 3 "" H 3600 4800 50  0000 C CNN
	1    3600 4800
	0    1    1    0   
$EndComp
$Comp
L GND #PWR01
U 1 1 5A26C6D2
P 3600 4950
F 0 "#PWR01" H 3600 4700 50  0001 C CNN
F 1 "GND" H 3600 4800 50  0000 C CNN
F 2 "" H 3600 4950 50  0000 C CNN
F 3 "" H 3600 4950 50  0000 C CNN
	1    3600 4950
	1    0    0    -1  
$EndComp
$Comp
L C C1
U 1 1 5A26C721
P 4000 4700
F 0 "C1" H 4025 4800 50  0000 L CNN
F 1 "470n" H 4025 4600 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 4038 4550 50  0001 C CNN
F 3 "" H 4000 4700 50  0000 C CNN
	1    4000 4700
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 5A26C746
P 3800 4400
F 0 "R3" V 3880 4400 50  0000 C CNN
F 1 "22k" V 3800 4400 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 3730 4400 50  0001 C CNN
F 3 "" H 3800 4400 50  0000 C CNN
	1    3800 4400
	0    1    1    0   
$EndComp
$Comp
L GND #PWR02
U 1 1 5A26C9C4
P 3200 4950
F 0 "#PWR02" H 3200 4700 50  0001 C CNN
F 1 "GND" H 3200 4800 50  0000 C CNN
F 2 "" H 3200 4950 50  0000 C CNN
F 3 "" H 3200 4950 50  0000 C CNN
	1    3200 4950
	1    0    0    -1  
$EndComp
$Comp
L OPA177 U1
U 1 1 5A26C7F5
P 4650 4500
F 0 "U1" H 4350 4700 50  0000 C CNN
F 1 "OPA177" H 4600 4500 50  0000 C CNN
F 2 "Housings_DIP:DIP-8_W7.62mm_Socket_LongPads" H 4550 4400 50  0001 C CNN
F 3 "" H 4650 4500 50  0000 C CNN
	1    4650 4500
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR03
U 1 1 5A26C982
P 4000 4950
F 0 "#PWR03" H 4000 4700 50  0001 C CNN
F 1 "GND" H 4000 4800 50  0000 C CNN
F 2 "" H 4000 4950 50  0000 C CNN
F 3 "" H 4000 4950 50  0000 C CNN
	1    4000 4950
	1    0    0    -1  
$EndComp
$Comp
L R R4
U 1 1 5A26CA07
P 4100 5350
F 0 "R4" V 4180 5350 50  0000 C CNN
F 1 "20k" V 4100 5350 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 4030 5350 50  0001 C CNN
F 3 "" H 4100 5350 50  0000 C CNN
	1    4100 5350
	0    1    1    0   
$EndComp
$Comp
L R R5
U 1 1 5A26CA58
P 4650 5250
F 0 "R5" V 4600 5400 50  0000 C CNN
F 1 "180k" V 4650 5250 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 4580 5250 50  0001 C CNN
F 3 "" H 4650 5250 50  0000 C CNN
	1    4650 5250
	0    1    1    0   
$EndComp
$Comp
L C C2
U 1 1 5A26CAE2
P 4650 5450
F 0 "C2" V 4700 5550 50  0000 L CNN
F 1 "220n" V 4700 5200 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 4688 5300 50  0001 C CNN
F 3 "" H 4650 5450 50  0000 C CNN
	1    4650 5450
	0    1    1    0   
$EndComp
$Comp
L C_Small C4
U 1 1 5A26CB62
P 4700 4850
F 0 "C4" V 4800 4900 50  0000 L CNN
F 1 "100n" V 4600 4750 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 4700 4850 50  0001 C CNN
F 3 "" H 4700 4850 50  0000 C CNN
	1    4700 4850
	0    1    1    0   
$EndComp
$Comp
L GND #PWR04
U 1 1 5A26CC13
P 4800 4850
F 0 "#PWR04" H 4800 4600 50  0001 C CNN
F 1 "GND" H 4800 4700 50  0000 C CNN
F 2 "" H 4800 4850 50  0000 C CNN
F 3 "" H 4800 4850 50  0000 C CNN
	1    4800 4850
	0    -1   -1   0   
$EndComp
NoConn ~ 4950 4600
NoConn ~ 4950 4400
NoConn ~ 4950 4300
$Comp
L R R10
U 1 1 5A26CE37
P 6200 4450
F 0 "R10" V 6280 4450 50  0000 C CNN
F 1 "10k" V 6200 4450 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 6130 4450 50  0001 C CNN
F 3 "" H 6200 4450 50  0000 C CNN
	1    6200 4450
	0    1    1    0   
$EndComp
$Comp
L C C7
U 1 1 5A26CE98
P 6400 4650
F 0 "C7" H 6300 4750 50  0000 L CNN
F 1 "220n" H 6450 4750 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 6438 4500 50  0001 C CNN
F 3 "" H 6400 4650 50  0000 C CNN
	1    6400 4650
	-1   0    0    1   
$EndComp
$Comp
L R R11
U 1 1 5A26D0A3
P 6700 4650
F 0 "R11" V 6780 4650 50  0000 C CNN
F 1 "RX" V 6700 4650 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 6630 4650 50  0001 C CNN
F 3 "" H 6700 4650 50  0000 C CNN
	1    6700 4650
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR05
U 1 1 5A26D18D
P 6550 4900
F 0 "#PWR05" H 6550 4650 50  0001 C CNN
F 1 "GND" H 6550 4750 50  0000 C CNN
F 2 "" H 6550 4900 50  0000 C CNN
F 3 "" H 6550 4900 50  0000 C CNN
	1    6550 4900
	1    0    0    -1  
$EndComp
$Comp
L OPA177 U3
U 1 1 5A26D235
P 7300 4550
F 0 "U3" H 7000 4750 50  0000 C CNN
F 1 "OPA177" H 7250 4550 50  0000 C CNN
F 2 "Housings_DIP:DIP-8_W7.62mm_Socket_LongPads" H 7200 4450 50  0001 C CNN
F 3 "" H 7300 4550 50  0000 C CNN
	1    7300 4550
	1    0    0    -1  
$EndComp
$Comp
L R R13
U 1 1 5A26D32E
P 7350 5250
F 0 "R13" V 7400 5100 50  0000 C CNN
F 1 "27k" V 7350 5250 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 7280 5250 50  0001 C CNN
F 3 "" H 7350 5250 50  0000 C CNN
	1    7350 5250
	0    -1   -1   0   
$EndComp
$Comp
L C_Small C8
U 1 1 5A26D3BD
P 7350 4900
F 0 "C8" V 7250 4950 50  0000 L CNN
F 1 "100n" V 7450 4850 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 7350 4900 50  0001 C CNN
F 3 "" H 7350 4900 50  0000 C CNN
	1    7350 4900
	0    1    1    0   
$EndComp
$Comp
L GND #PWR06
U 1 1 5A26D547
P 7450 4900
F 0 "#PWR06" H 7450 4650 50  0001 C CNN
F 1 "GND" H 7450 4750 50  0000 C CNN
F 2 "" H 7450 4900 50  0000 C CNN
F 3 "" H 7450 4900 50  0000 C CNN
	1    7450 4900
	0    -1   -1   0   
$EndComp
$Comp
L C C9
U 1 1 5A26D71B
P 7350 5450
F 0 "C9" V 7300 5250 50  0000 L CNN
F 1 "220n" V 7300 5550 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 7388 5300 50  0001 C CNN
F 3 "" H 7350 5450 50  0000 C CNN
	1    7350 5450
	0    -1   -1   0   
$EndComp
$Comp
L R R12
U 1 1 5A26E247
P 6700 5350
F 0 "R12" V 6780 5350 50  0000 C CNN
F 1 "2k7" V 6700 5350 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 6630 5350 50  0001 C CNN
F 3 "" H 6700 5350 50  0000 C CNN
	1    6700 5350
	0    1    1    0   
$EndComp
$Comp
L POT RV1
U 1 1 5A26E36E
P 6350 5350
F 0 "RV1" H 6350 5270 50  0000 C CNN
F 1 "50k" H 6350 5350 50  0000 C CNN
F 2 "Potentiometers:Potentiometer_Alps_RK163_Single_Vertical" H 6350 5350 50  0001 C CNN
F 3 "" H 6350 5350 50  0000 C CNN
	1    6350 5350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR07
U 1 1 5A26E5FD
P 5850 5350
F 0 "#PWR07" H 5850 5100 50  0001 C CNN
F 1 "GND" H 5850 5200 50  0000 C CNN
F 2 "" H 5850 5350 50  0000 C CNN
F 3 "" H 5850 5350 50  0000 C CNN
	1    5850 5350
	0    1    1    0   
$EndComp
$Comp
L CONN_01X02 P2
U 1 1 5A26E467
P 6000 5050
F 0 "P2" H 6000 5200 50  0000 C CNN
F 1 "GAIN_ADJ" V 6100 5050 50  0000 C CNN
F 2 "w_pin_strip:pin_strip_2mm_2" H 6000 5050 50  0001 C CNN
F 3 "" H 6000 5050 50  0000 C CNN
	1    6000 5050
	0    1    -1   0   
$EndComp
$Comp
L R R14
U 1 1 5A26E913
P 7950 4550
F 0 "R14" V 8030 4550 50  0000 C CNN
F 1 "100" V 7950 4550 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 7880 4550 50  0001 C CNN
F 3 "" H 7950 4550 50  0000 C CNN
	1    7950 4550
	0    1    1    0   
$EndComp
$Comp
L ZENERsmall D4
U 1 1 5A26EA1B
P 8150 4700
F 0 "D4" H 8200 4600 50  0000 C CNN
F 1 "5V1" H 8150 4800 50  0000 C CNN
F 2 "Diodes_THT:D_DO-41_SOD81_P7.62mm_Horizontal" H 8150 4700 50  0001 C CNN
F 3 "" H 8150 4700 50  0000 C CNN
	1    8150 4700
	0    1    1    0   
$EndComp
$Comp
L GND #PWR08
U 1 1 5A26EC3A
P 8150 4900
F 0 "#PWR08" H 8150 4650 50  0001 C CNN
F 1 "GND" H 8150 4750 50  0000 C CNN
F 2 "" H 8150 4900 50  0000 C CNN
F 3 "" H 8150 4900 50  0000 C CNN
	1    8150 4900
	1    0    0    -1  
$EndComp
$Comp
L BNC P3
U 1 1 5A26ED35
P 8650 4550
F 0 "P3" H 8750 4400 50  0000 C CNN
F 1 "OUTPUT (0-5V)" H 8650 4700 50  0000 C CNN
F 2 "Connectors:bnc-ci" H 8650 4550 50  0001 C CNN
F 3 "" H 8650 4550 50  0000 C CNN
	1    8650 4550
	1    0    0    -1  
$EndComp
$Comp
L +8V #PWR09
U 1 1 5A26F5A2
P 4550 4100
F 0 "#PWR09" H 4550 3950 50  0001 C CNN
F 1 "+8V" H 4550 4240 50  0000 C CNN
F 2 "" H 4550 4100 50  0000 C CNN
F 3 "" H 4550 4100 50  0000 C CNN
	1    4550 4100
	1    0    0    -1  
$EndComp
$Comp
L -8V #PWR7
U 1 1 5A26F61A
P 4550 4900
F 0 "#PWR7" H 4550 5000 50  0001 C CNN
F 1 "-8V" H 4550 5050 50  0000 C CNN
F 2 "" H 4550 4900 50  0000 C CNN
F 3 "" H 4550 4900 50  0000 C CNN
	1    4550 4900
	-1   0    0    1   
$EndComp
$Comp
L +8V #PWR010
U 1 1 5A26F7A6
P 7200 4250
F 0 "#PWR010" H 7200 4100 50  0001 C CNN
F 1 "+8V" H 7200 4390 50  0000 C CNN
F 2 "" H 7200 4250 50  0000 C CNN
F 3 "" H 7200 4250 50  0000 C CNN
	1    7200 4250
	1    0    0    -1  
$EndComp
$Comp
L -8V #PWR22
U 1 1 5A26F7FC
P 7200 4950
F 0 "#PWR22" H 7200 5050 50  0001 C CNN
F 1 "-8V" H 7200 5100 50  0000 C CNN
F 2 "" H 7200 4950 50  0000 C CNN
F 3 "" H 7200 4950 50  0000 C CNN
	1    7200 4950
	-1   0    0    1   
$EndComp
$Comp
L LM393 U2
U 1 1 5A26F9BB
P 6500 3200
F 0 "U2" H 6650 3350 50  0000 C CNN
F 1 "LM393" H 6750 3050 50  0000 C CNN
F 2 "Housings_DIP:DIP-8_W7.62mm_Socket_LongPads" H 6500 3200 50  0001 C CNN
F 3 "" H 6500 3200 50  0000 C CNN
	1    6500 3200
	1    0    0    -1  
$EndComp
$Comp
L R R8
U 1 1 5A2700C8
P 6100 3500
F 0 "R8" V 6180 3500 50  0000 C CNN
F 1 "2k7" V 6100 3500 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 6030 3500 50  0001 C CNN
F 3 "" H 6100 3500 50  0000 C CNN
	1    6100 3500
	-1   0    0    -1  
$EndComp
$Comp
L C_Small C5
U 1 1 5A270604
P 6550 3600
F 0 "C5" V 6650 3600 50  0000 L CNN
F 1 "100n" V 6450 3500 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 6550 3600 50  0001 C CNN
F 3 "" H 6550 3600 50  0000 C CNN
	1    6550 3600
	0    1    -1   0   
$EndComp
$Comp
L GND #PWR011
U 1 1 5A27060A
P 6650 3600
F 0 "#PWR011" H 6650 3350 50  0001 C CNN
F 1 "GND" H 6650 3450 50  0000 C CNN
F 2 "" H 6650 3600 50  0000 C CNN
F 3 "" H 6650 3600 50  0000 C CNN
	1    6650 3600
	0    -1   1    0   
$EndComp
$Comp
L -8V #PWR17
U 1 1 5A270612
P 6400 3650
F 0 "#PWR17" H 6400 3750 50  0001 C CNN
F 1 "-8V" H 6400 3800 50  0000 C CNN
F 2 "" H 6400 3650 50  0000 C CNN
F 3 "" H 6400 3650 50  0000 C CNN
	1    6400 3650
	1    0    0    1   
$EndComp
NoConn ~ 7600 4350
NoConn ~ 7600 4650
$Comp
L C_Small C3
U 1 1 5A27161E
P 4700 4150
F 0 "C3" V 4750 4200 50  0000 L CNN
F 1 "100n" V 4600 4100 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 4700 4150 50  0001 C CNN
F 3 "" H 4700 4150 50  0000 C CNN
	1    4700 4150
	0    1    1    0   
$EndComp
$Comp
L GND #PWR012
U 1 1 5A2718ED
P 4800 4150
F 0 "#PWR012" H 4800 3900 50  0001 C CNN
F 1 "GND" H 4800 4000 50  0000 C CNN
F 2 "" H 4800 4150 50  0000 C CNN
F 3 "" H 4800 4150 50  0000 C CNN
	1    4800 4150
	0    -1   -1   0   
$EndComp
$Comp
L R R6
U 1 1 5A2721C9
P 5800 3300
F 0 "R6" V 5880 3300 50  0000 C CNN
F 1 "3k3" V 5800 3300 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 5730 3300 50  0001 C CNN
F 3 "" H 5800 3300 50  0000 C CNN
	1    5800 3300
	1    0    0    1   
$EndComp
$Comp
L R R7
U 1 1 5A27226A
P 5800 2900
F 0 "R7" V 5880 2900 50  0000 C CNN
F 1 "5k6" V 5800 2900 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 5730 2900 50  0001 C CNN
F 3 "" H 5800 2900 50  0000 C CNN
	1    5800 2900
	1    0    0    1   
$EndComp
$Comp
L +8V #PWR013
U 1 1 5A272681
P 6400 2800
F 0 "#PWR013" H 6400 2650 50  0001 C CNN
F 1 "+8V" H 6400 2940 50  0000 C CNN
F 2 "" H 6400 2800 50  0000 C CNN
F 3 "" H 6400 2800 50  0000 C CNN
	1    6400 2800
	1    0    0    -1  
$EndComp
$Comp
L C_Small C6
U 1 1 5A272687
P 6550 2850
F 0 "C6" V 6600 2900 50  0000 L CNN
F 1 "100n" V 6450 2800 50  0000 L CNN
F 2 "Capacitors_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm" H 6550 2850 50  0001 C CNN
F 3 "" H 6550 2850 50  0000 C CNN
	1    6550 2850
	0    1    1    0   
$EndComp
$Comp
L GND #PWR014
U 1 1 5A272690
P 6650 2850
F 0 "#PWR014" H 6650 2600 50  0001 C CNN
F 1 "GND" H 6650 2700 50  0000 C CNN
F 2 "" H 6650 2850 50  0000 C CNN
F 3 "" H 6650 2850 50  0000 C CNN
	1    6650 2850
	0    -1   -1   0   
$EndComp
$Comp
L +8V #PWR015
U 1 1 5A272853
P 5800 3450
F 0 "#PWR015" H 5800 3300 50  0001 C CNN
F 1 "+8V" H 5800 3590 50  0000 C CNN
F 2 "" H 5800 3450 50  0000 C CNN
F 3 "" H 5800 3450 50  0000 C CNN
	1    5800 3450
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR016
U 1 1 5A2728C1
P 5800 2750
F 0 "#PWR016" H 5800 2500 50  0001 C CNN
F 1 "GND" H 5800 2600 50  0000 C CNN
F 2 "" H 5800 2750 50  0000 C CNN
F 3 "" H 5800 2750 50  0000 C CNN
	1    5800 2750
	-1   0    0    1   
$EndComp
$Comp
L R R9
U 1 1 5A272BF7
P 6250 2450
F 0 "R9" V 6330 2450 50  0000 C CNN
F 1 "27k" V 6250 2450 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 6180 2450 50  0001 C CNN
F 3 "" H 6250 2450 50  0000 C CNN
	1    6250 2450
	0    1    -1   0   
$EndComp
$Comp
L D_Small D3
U 1 1 5A272D8D
P 6600 2450
F 0 "D3" H 6550 2530 50  0000 L CNN
F 1 "1N4148" H 6450 2370 50  0000 L CNN
F 2 "Diodes_THT:D_DO-35_SOD27_P7.62mm_Horizontal" V 6600 2450 50  0001 C CNN
F 3 "" V 6600 2450 50  0000 C CNN
	1    6600 2450
	-1   0    0    1   
$EndComp
$Comp
L LED D5
U 1 1 5A27312A
P 8800 3400
F 0 "D5" H 8800 3300 50  0000 C CNN
F 1 "SATURATION_LED" H 8800 3550 50  0000 C CNN
F 2 "LEDs:LED_D5.0mm" H 8800 3400 50  0001 C CNN
F 3 "" H 8800 3400 50  0000 C CNN
	1    8800 3400
	0    1    1    0   
$EndComp
$Comp
L R R15
U 1 1 5A2731DD
P 8600 3650
F 0 "R15" V 8680 3650 50  0000 C CNN
F 1 "2k7" V 8600 3650 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 8530 3650 50  0001 C CNN
F 3 "" H 8600 3650 50  0000 C CNN
	1    8600 3650
	0    -1   1    0   
$EndComp
$Comp
L +8V #PWR017
U 1 1 5A2735C3
P 8400 3700
F 0 "#PWR017" H 8400 3550 50  0001 C CNN
F 1 "+8V" H 8400 3840 50  0000 C CNN
F 2 "" H 8400 3700 50  0000 C CNN
F 3 "" H 8400 3700 50  0000 C CNN
	1    8400 3700
	-1   0    0    1   
$EndComp
$Comp
L R R16
U 1 1 5A275E4B
P 4500 2650
F 0 "R16" V 4580 2650 50  0000 C CNN
F 1 "10" V 4500 2650 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 4430 2650 50  0001 C CNN
F 3 "" H 4500 2650 50  0000 C CNN
	1    4500 2650
	0    1    1    0   
$EndComp
$Comp
L R R17
U 1 1 5A275FB0
P 4500 2950
F 0 "R17" V 4580 2950 50  0000 C CNN
F 1 "10" V 4500 2950 50  0000 C CNN
F 2 "w_pth_resistors:RC03" V 4430 2950 50  0001 C CNN
F 3 "" H 4500 2950 50  0000 C CNN
	1    4500 2950
	0    1    1    0   
$EndComp
$Comp
L CP_Small C10
U 1 1 5A276093
P 4750 3100
F 0 "C10" H 4760 3170 50  0000 L CNN
F 1 "22u" H 4760 3020 50  0000 L CNN
F 2 "Capacitors_THT:CP_Radial_D5.0mm_P2.50mm" H 4750 3100 50  0001 C CNN
F 3 "" H 4750 3100 50  0000 C CNN
	1    4750 3100
	1    0    0    1   
$EndComp
$Comp
L CP_Small C11
U 1 1 5A276151
P 5350 3100
F 0 "C11" H 5360 3170 50  0000 L CNN
F 1 "22u" H 5360 3020 50  0000 L CNN
F 2 "Capacitors_THT:CP_Radial_D5.0mm_P2.50mm" H 5350 3100 50  0001 C CNN
F 3 "" H 5350 3100 50  0000 C CNN
	1    5350 3100
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR018
U 1 1 5A276C0A
P 4750 3300
F 0 "#PWR018" H 4750 3050 50  0001 C CNN
F 1 "GND" H 4750 3150 50  0000 C CNN
F 2 "" H 4750 3300 50  0000 C CNN
F 3 "" H 4750 3300 50  0000 C CNN
	1    4750 3300
	1    0    0    -1  
$EndComp
$Comp
L +8V #PWR019
U 1 1 5A2771AF
P 5350 2600
F 0 "#PWR019" H 5350 2450 50  0001 C CNN
F 1 "+8V" H 5350 2740 50  0000 C CNN
F 2 "" H 5350 2600 50  0000 C CNN
F 3 "" H 5350 2600 50  0000 C CNN
	1    5350 2600
	1    0    0    -1  
$EndComp
$Comp
L -8V #PWR8
U 1 1 5A2772C0
P 4750 2900
F 0 "#PWR8" H 4750 3000 50  0001 C CNN
F 1 "-8V" H 4750 3050 50  0000 C CNN
F 2 "" H 4750 2900 50  0000 C CNN
F 3 "" H 4750 2900 50  0000 C CNN
	1    4750 2900
	1    0    0    -1  
$EndComp
$Comp
L PWR_FLAG #FLG020
U 1 1 5A2778A9
P 4750 2550
F 0 "#FLG020" H 4750 2645 50  0001 C CNN
F 1 "PWR_FLAG" H 4750 2730 50  0000 C CNN
F 2 "" H 4750 2550 50  0000 C CNN
F 3 "" H 4750 2550 50  0000 C CNN
	1    4750 2550
	1    0    0    -1  
$EndComp
$Comp
L PWR_FLAG #FLG021
U 1 1 5A277BFD
P 5050 2900
F 0 "#FLG021" H 5050 2995 50  0001 C CNN
F 1 "PWR_FLAG" H 5050 3080 50  0000 C CNN
F 2 "" H 5050 2900 50  0000 C CNN
F 3 "" H 5050 2900 50  0000 C CNN
	1    5050 2900
	1    0    0    -1  
$EndComp
$Comp
L PWR_FLAG #FLG022
U 1 1 5A278544
P 5050 3300
F 0 "#FLG022" H 5050 3395 50  0001 C CNN
F 1 "PWR_FLAG" H 5050 3480 50  0000 C CNN
F 2 "" H 5050 3300 50  0000 C CNN
F 3 "" H 5050 3300 50  0000 C CNN
	1    5050 3300
	1    0    0    1   
$EndComp
$Comp
L GND #PWR023
U 1 1 5A278E18
P 3950 5350
F 0 "#PWR023" H 3950 5100 50  0001 C CNN
F 1 "GND" H 3950 5200 50  0000 C CNN
F 2 "" H 3950 5350 50  0000 C CNN
F 3 "" H 3950 5350 50  0000 C CNN
	1    3950 5350
	0    1    1    0   
$EndComp
Text Notes 4150 3700 0    60   ~ 0
POWER - Symmetric 8V\n
Text Notes 3550 5700 0    60   ~ 0
10x 1st Stage Amplifier\n
Text Notes 6650 5700 0    60   ~ 0
1-10x 2nd Stage Amplifier
Text Notes 7050 3800 0    60   ~ 0
Saturation Indicator
Text Notes 5650 3150 0    60   ~ 0
5V
Wire Wire Line
	3550 4400 3650 4400
Wire Wire Line
	3600 4400 3600 4450
Connection ~ 3600 4400
Wire Wire Line
	3200 4500 3200 4400
Wire Wire Line
	2950 4400 3250 4400
Connection ~ 3200 4400
Wire Wire Line
	2800 4900 3200 4900
Wire Wire Line
	3200 4800 3200 4950
Connection ~ 3200 4900
Wire Wire Line
	3950 4400 4350 4400
Wire Wire Line
	4000 4400 4000 4550
Wire Wire Line
	4000 4950 4000 4850
Connection ~ 4000 4400
Wire Wire Line
	4550 4800 4550 4900
Wire Wire Line
	4550 4850 4600 4850
Wire Wire Line
	4500 5250 4450 5250
Wire Wire Line
	4450 5250 4450 5450
Wire Wire Line
	4450 5450 4500 5450
Wire Wire Line
	4250 5350 4450 5350
Wire Wire Line
	4300 4600 4300 5350
Wire Wire Line
	4300 4600 4350 4600
Connection ~ 4450 5350
Wire Wire Line
	4800 5250 4850 5250
Wire Wire Line
	4850 5250 4850 5450
Wire Wire Line
	4850 5450 4800 5450
Wire Wire Line
	5100 5350 4850 5350
Wire Wire Line
	5100 4500 5100 5350
Wire Wire Line
	4950 4500 5200 4500
Connection ~ 4850 5350
Wire Wire Line
	6350 4450 7000 4450
Wire Wire Line
	6400 4450 6400 4500
Wire Wire Line
	6700 4450 6700 4500
Connection ~ 6400 4450
Wire Wire Line
	6400 4800 6400 4850
Wire Wire Line
	6400 4850 6700 4850
Wire Wire Line
	6700 4850 6700 4800
Wire Wire Line
	6550 4900 6550 4850
Connection ~ 6550 4850
Connection ~ 5100 4500
Connection ~ 6700 4450
Wire Wire Line
	7200 4850 7200 4950
Wire Wire Line
	7200 4900 7250 4900
Wire Wire Line
	6950 4650 6950 5350
Wire Wire Line
	6950 4650 7000 4650
Wire Wire Line
	7150 5250 7200 5250
Wire Wire Line
	7550 5250 7500 5250
Wire Wire Line
	7150 5250 7150 5450
Wire Wire Line
	7150 5450 7200 5450
Wire Wire Line
	7550 5450 7500 5450
Wire Wire Line
	7550 5250 7550 5450
Connection ~ 7550 5350
Wire Wire Line
	6850 5350 7150 5350
Connection ~ 7150 5350
Connection ~ 6950 5350
Wire Wire Line
	6050 5350 6200 5350
Wire Wire Line
	6150 5350 6150 5150
Wire Wire Line
	6150 5150 6350 5150
Wire Wire Line
	6350 5150 6350 5200
Wire Wire Line
	6500 5350 6550 5350
Connection ~ 6150 5350
Wire Wire Line
	7700 4350 7700 5350
Wire Wire Line
	8100 4550 8500 4550
Wire Wire Line
	8150 4550 8150 4600
Connection ~ 8150 4550
Wire Wire Line
	2800 4600 2800 4900
Wire Wire Line
	8150 4800 8150 4900
Wire Wire Line
	8150 4850 8650 4850
Wire Wire Line
	8650 4850 8650 4750
Connection ~ 8150 4850
Connection ~ 4550 4850
Connection ~ 7200 4900
Wire Wire Line
	6050 5250 6050 5350
Wire Wire Line
	5950 5250 5950 5350
Wire Wire Line
	5950 5350 5850 5350
Wire Wire Line
	6100 3350 6100 3300
Wire Wire Line
	6100 3300 6200 3300
Wire Wire Line
	6400 3600 6450 3600
Connection ~ 6400 3600
Wire Wire Line
	6400 3500 6400 3650
Wire Wire Line
	4600 4150 4550 4150
Wire Wire Line
	4550 4100 4550 4200
Connection ~ 4550 4150
Wire Wire Line
	6450 2850 6400 2850
Wire Wire Line
	6400 2800 6400 2900
Connection ~ 6400 2850
Wire Wire Line
	5800 3050 5800 3150
Wire Wire Line
	5800 3100 6200 3100
Connection ~ 5800 3100
Wire Wire Line
	6700 2450 6900 2450
Wire Wire Line
	6900 2450 6900 3200
Wire Wire Line
	6800 3200 8800 3200
Wire Wire Line
	6400 2450 6500 2450
Wire Wire Line
	6100 2450 6050 2450
Wire Wire Line
	6050 2450 6050 3100
Connection ~ 6050 3100
Connection ~ 6900 3200
Wire Wire Line
	8800 3600 8800 3650
Wire Wire Line
	8800 3650 8750 3650
Wire Wire Line
	8400 3700 8400 3650
Wire Wire Line
	8400 3650 8450 3650
Wire Wire Line
	4750 2900 4750 3000
Wire Wire Line
	4650 2950 5050 2950
Wire Wire Line
	5350 2600 5350 3000
Wire Wire Line
	4650 2650 5350 2650
Wire Wire Line
	4750 3200 4750 3300
Wire Wire Line
	4300 3250 5350 3250
Wire Wire Line
	5350 3250 5350 3200
Connection ~ 4750 3250
Connection ~ 5350 2650
Wire Wire Line
	4750 2550 4750 2650
Connection ~ 4750 2650
Wire Wire Line
	5050 2950 5050 2900
Connection ~ 4750 2950
Wire Wire Line
	5050 3300 5050 3250
Connection ~ 5050 3250
Connection ~ 4300 5350
Wire Notes Line
	3750 3800 5550 3800
Wire Notes Line
	5550 3800 5550 2250
Wire Notes Line
	5550 2250 3750 2250
Wire Notes Line
	2550 3850 5550 3850
Wire Notes Line
	2550 5750 5550 5750
Wire Notes Line
	5600 4050 5600 5750
Wire Notes Line
	5600 5750 9050 5750
Wire Notes Line
	5600 4050 9050 4050
Wire Notes Line
	5600 4000 9050 4000
Wire Notes Line
	9050 4000 9050 2100
Wire Notes Line
	9050 2100 5600 2100
Wire Notes Line
	5600 2100 5600 4000
Wire Wire Line
	3600 4650 3600 4700
Wire Wire Line
	3600 4950 3600 4900
Text GLabel 5200 4500 2    60   Output ~ 0
OUT1
Wire Notes Line
	5550 5750 5550 3850
Wire Notes Line
	2550 3850 2550 5750
Text GLabel 6050 4450 0    60   Input ~ 0
OUT1
Text GLabel 7850 4350 2    60   Output ~ 0
OUT2
Wire Notes Line
	9050 4050 9050 5750
Text GLabel 6050 3800 0    60   Input ~ 0
OUT2
Wire Wire Line
	6050 3800 6100 3800
Wire Wire Line
	6100 3800 6100 3650
Connection ~ 2850 3250
Wire Wire Line
	2850 3250 2950 3250
Wire Wire Line
	2850 3050 2850 3300
Wire Wire Line
	2950 3050 2850 3050
NoConn ~ 3550 3150
NoConn ~ 3150 3450
NoConn ~ 3150 2850
$Comp
L GND #PWR024
U 1 1 5A274D3B
P 2850 3300
F 0 "#PWR024" H 2850 3050 50  0001 C CNN
F 1 "GND" H 2850 3150 50  0000 C CNN
F 2 "" H 2850 3300 50  0000 C CNN
F 3 "" H 2850 3300 50  0000 C CNN
	1    2850 3300
	1    0    0    -1  
$EndComp
$Comp
L LM393 U2
U 2 1 5A26FA9A
P 3250 3150
F 0 "U2" H 3400 3300 50  0000 C CNN
F 1 "LM393" H 3500 3000 50  0000 C CNN
F 2 "Housings_DIP:DIP-8_W7.62mm_Socket_LongPads" H 3250 3150 50  0001 C CNN
F 3 "" H 3250 3150 50  0000 C CNN
	2    3250 3150
	1    0    0    -1  
$EndComp
NoConn ~ 7600 4450
Wire Wire Line
	7600 4550 7800 4550
Connection ~ 7700 4550
Wire Wire Line
	7700 4350 7850 4350
Wire Wire Line
	7700 5350 7550 5350
Text Notes 4400 2600 0    60   ~ 0
1W
Text Notes 4400 2900 0    60   ~ 0
1W
$Comp
L CONN_01X03 P4
U 1 1 5A37B0B0
P 4050 2950
F 0 "P4" H 4050 3150 50  0000 C CNN
F 1 "POWER" H 3950 2750 50  0000 C CNN
F 2 "Connectors:bornier3" H 4050 2950 50  0001 C CNN
F 3 "" H 4050 2950 50  0000 C CNN
	1    4050 2950
	-1   0    0    1   
$EndComp
Wire Wire Line
	4250 2950 4350 2950
Wire Wire Line
	4250 2850 4300 2850
Wire Wire Line
	4300 2850 4300 2650
Wire Wire Line
	4300 2650 4350 2650
Wire Wire Line
	4250 3050 4300 3050
Wire Wire Line
	4300 3050 4300 3250
Text Notes 3800 3100 0    60   ~ 0
GND
Text Notes 3850 2900 0    60   ~ 0
+8
Text Notes 3850 3000 0    60   ~ 0
-8\n
Wire Notes Line
	3750 2250 3750 3800
$EndSCHEMATC