HeadphoneAmp.sch

EESchema Schematic File Version 2
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:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:digital-audio
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:basicx
LIBS:con-jack
LIBS:HeadphoneAmp-cache
EELAYER 27 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date "21 jun 2014"
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L CONN_1 GND2
U 1 1 5382FA52
P 3100 2700
F 0 "GND2" H 3180 2700 40  0000 L CNN
F 1 "CONN_1" H 3100 2755 30  0001 C CNN
F 2 "" H 3100 2700 60  0001 C CNN
F 3 "" H 3100 2700 60  0001 C CNN
	1    3100 2700
	-1   0    0    1   
$EndComp
$Comp
L CONN_1 R-IN1
U 1 1 5382FA48
P 3100 2600
F 0 "R-IN1" H 3180 2600 40  0000 L CNN
F 1 "CONN_1" H 3100 2655 30  0001 C CNN
F 2 "" H 3100 2600 60  0001 C CNN
F 3 "" H 3100 2600 60  0001 C CNN
	1    3100 2600
	-1   0    0    1   
$EndComp
$Comp
L CONN_1 L-IN1
U 1 1 5382FA46
P 3100 2500
F 0 "L-IN1" H 3180 2500 40  0000 L CNN
F 1 "CONN_1" H 3100 2555 30  0001 C CNN
F 2 "" H 3100 2500 60  0001 C CNN
F 3 "" H 3100 2500 60  0001 C CNN
	1    3100 2500
	-1   0    0    1   
$EndComp
$Comp
L CONN_1 GND1
U 1 1 5382FA17
P 1150 1250
F 0 "GND1" H 1230 1250 40  0000 L CNN
F 1 "CONN_1" H 1150 1305 30  0001 C CNN
F 2 "" H 1150 1250 60  0001 C CNN
F 3 "" H 1150 1250 60  0001 C CNN
	1    1150 1250
	-1   0    0    1   
$EndComp
$Comp
L CONN_1 +VIN1
U 1 1 5382FA0A
P 750 1050
F 0 "+VIN1" H 830 1050 40  0000 L CNN
F 1 "CONN_1" H 750 1105 30  0001 C CNN
F 2 "" H 750 1050 60  0001 C CNN
F 3 "" H 750 1050 60  0001 C CNN
	1    750  1050
	-1   0    0    1   
$EndComp
$Comp
L CONN_1 GND3
U 1 1 5382F9C7
P 10450 2400
F 0 "GND3" H 10530 2400 40  0000 L CNN
F 1 "CONN_1" H 10450 2455 30  0001 C CNN
F 2 "" H 10450 2400 60  0001 C CNN
F 3 "" H 10450 2400 60  0001 C CNN
	1    10450 2400
	1    0    0    -1  
$EndComp
$Comp
L CONN_1 R-OUT1
U 1 1 5382F9C2
P 10450 2300
F 0 "R-OUT1" H 10530 2300 40  0000 L CNN
F 1 "CONN_1" H 10450 2355 30  0001 C CNN
F 2 "" H 10450 2300 60  0001 C CNN
F 3 "" H 10450 2300 60  0001 C CNN
	1    10450 2300
	1    0    0    -1  
$EndComp
$Comp
L CONN_1 L-OUT1
U 1 1 5382F9BC
P 10450 2200
F 0 "L-OUT1" H 10530 2200 40  0000 L CNN
F 1 "CONN_1" H 10450 2255 30  0001 C CNN
F 2 "" H 10450 2200 60  0001 C CNN
F 3 "" H 10450 2200 60  0001 C CNN
	1    10450 2200
	1    0    0    -1  
$EndComp
Wire Wire Line
	5150 5100 5150 4850
Wire Wire Line
	5350 4550 5350 4850
Wire Wire Line
	5350 4850 5150 4850
Connection ~ 1300 1750
Wire Wire Line
	1300 1250 1300 3350
Wire Wire Line
	1300 3350 2050 3350
Wire Wire Line
	5150 1050 5150 1250
Wire Wire Line
	5150 4950 6700 4950
Wire Wire Line
	6700 1950 5150 1950
Wire Wire Line
	7100 1950 7550 1950
Wire Wire Line
	5050 6550 5050 6850
Wire Wire Line
	5050 6050 5050 5900
Connection ~ 5050 2950
Wire Wire Line
	5050 2950 5400 2950
Wire Wire Line
	5400 2950 5400 3050
Wire Wire Line
	5150 4250 5150 4150
Wire Wire Line
	5350 1850 5150 1850
Wire Wire Line
	5350 1850 5350 1550
Wire Wire Line
	1300 1050 1400 1050
Wire Wire Line
	8900 4500 8900 4150
Connection ~ 2450 1050
Wire Wire Line
	2450 1250 2450 1050
Connection ~ 2450 1750
Wire Wire Line
	9650 5200 10100 5200
Connection ~ 9800 5200
Wire Wire Line
	9000 1500 9000 1050
Wire Wire Line
	3750 5500 3500 5500
Wire Wire Line
	3500 5500 3500 2600
Wire Wire Line
	3500 2600 3250 2600
Connection ~ 7550 4700
Wire Wire Line
	8600 5750 8350 5750
Wire Wire Line
	9800 5450 9800 5200
Wire Wire Line
	8900 5450 8900 4900
Wire Wire Line
	8600 4700 7150 4700
Connection ~ 5150 4950
Connection ~ 4350 5500
Wire Wire Line
	4350 6050 4350 5500
Wire Wire Line
	7550 1700 7550 2250
Connection ~ 7550 1700
Wire Wire Line
	7150 1700 8700 1700
Connection ~ 7550 1950
Connection ~ 5150 1950
Wire Wire Line
	4500 2500 4500 3000
Wire Wire Line
	5050 3500 5050 3750
Wire Wire Line
	9800 2950 9800 3650
Wire Wire Line
	8700 2750 8450 2750
Wire Wire Line
	4150 2500 4850 2500
Wire Wire Line
	5150 1850 5150 2100
Wire Wire Line
	9000 1900 9000 2450
Wire Wire Line
	9800 2200 9800 2450
Wire Wire Line
	9300 2200 9000 2200
Connection ~ 9000 2200
Wire Wire Line
	5050 2900 5050 3000
Connection ~ 4500 2500
Wire Wire Line
	8950 3400 9000 3400
Wire Wire Line
	9000 3400 9000 3050
Wire Wire Line
	8450 2750 8450 3650
Connection ~ 8450 3400
Wire Wire Line
	4500 3500 4500 3750
Wire Wire Line
	4850 5500 4150 5500
Wire Wire Line
	4350 6550 4350 6850
Wire Wire Line
	9250 5200 8900 5200
Connection ~ 8900 5200
Wire Wire Line
	8900 6050 8900 6350
Wire Wire Line
	8900 6350 8850 6350
Wire Wire Line
	8350 5750 8350 6850
Connection ~ 8350 6350
Connection ~ 7550 2950
Wire Wire Line
	9800 5950 9800 6850
Wire Wire Line
	3250 2500 3750 2500
Wire Wire Line
	3250 2700 3250 3100
Wire Wire Line
	9700 2200 10300 2200
Connection ~ 9800 2200
Wire Wire Line
	10100 5200 10100 2300
Wire Wire Line
	10300 2400 10300 3650
Wire Wire Line
	9000 1050 2000 1050
Connection ~ 5150 1050
Wire Wire Line
	3050 1650 3050 1750
Wire Wire Line
	1700 1750 1700 1350
Wire Wire Line
	2450 1650 2450 1800
Wire Wire Line
	3050 1050 3050 1250
Connection ~ 3050 1050
Wire Wire Line
	7550 2750 7550 3250
Wire Wire Line
	7550 3750 7550 4950
Wire Wire Line
	8900 4150 4300 4150
Wire Wire Line
	4300 4150 4300 1050
Connection ~ 4300 1050
Connection ~ 5150 4150
Wire Wire Line
	3050 1750 1300 1750
Connection ~ 1700 1750
Wire Wire Line
	5400 3450 5400 3600
Wire Wire Line
	5400 3600 5050 3600
Connection ~ 5050 3600
Wire Wire Line
	5450 6100 5450 5950
Wire Wire Line
	5450 5950 5050 5950
Connection ~ 5050 5950
Wire Wire Line
	5450 6500 5450 6700
Wire Wire Line
	5450 6700 5050 6700
Connection ~ 5050 6700
Wire Wire Line
	7550 4950 7100 4950
Wire Wire Line
	6650 1700 6400 1700
Wire Wire Line
	6400 1700 6400 1950
Connection ~ 6400 1950
Wire Wire Line
	6650 4700 6400 4700
Wire Wire Line
	6400 4700 6400 4950
Connection ~ 6400 4950
Wire Wire Line
	10100 2300 10300 2300
Wire Wire Line
	2250 3350 2650 3350
Wire Wire Line
	2650 3350 2650 2050
Wire Wire Line
	2650 2050 3600 2050
Wire Wire Line
	3600 2050 3600 1050
Connection ~ 3600 1050
$Comp
L CP1 C6
U 1 1 537DB36B
P 5450 6300
F 0 "C6" H 5500 6400 50  0000 L CNN
F 1 "47uF" H 5500 6200 50  0000 L CNN
F 2 "" H 5450 6300 60  0001 C CNN
F 3 "" H 5450 6300 60  0001 C CNN
	1    5450 6300
	1    0    0    -1  
$EndComp
$Comp
L CP1 C5
U 1 1 537DB32A
P 5400 3250
F 0 "C5" H 5450 3350 50  0000 L CNN
F 1 "47uF" H 5450 3150 50  0000 L CNN
F 2 "" H 5400 3250 60  0001 C CNN
F 3 "" H 5400 3250 60  0001 C CNN
	1    5400 3250
	1    0    0    -1  
$EndComp
$Comp
L POTL_1 P3
U 1 1 537DB257
P 5150 4550
F 0 "P3" V 4974 4400 50  0000 L BNN
F 1 "B50K" V 5049 4400 50  0000 L BNN
F 2 "Pot-POTL_1" H 5150 4700 50  0001 C CNN
F 3 "" H 5150 4550 60  0001 C CNN
	1    5150 4550
	1    0    0    -1  
$EndComp
$Comp
L POTL_1 P2
U 1 1 537DB1C2
P 5150 1550
F 0 "P2" V 4974 1400 50  0000 L BNN
F 1 "B50K" V 5049 1400 50  0000 L BNN
F 2 "Pot-POTL_1" H 5150 1700 50  0001 C CNN
F 3 "" H 5150 1550 60  0001 C CNN
	1    5150 1550
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR1
U 1 1 5367706F
P 2450 1800
F 0 "#PWR1" H 2450 1800 30  0001 C CNN
F 1 "GND" H 2450 1730 30  0001 C CNN
F 2 "" H 2450 1800 60  0001 C CNN
F 3 "" H 2450 1800 60  0001 C CNN
	1    2450 1800
	1    0    0    -1  
$EndComp
$Comp
L CP1 C2
U 1 1 53677059
P 3050 1450
F 0 "C2" H 3100 1550 50  0000 L CNN
F 1 "470uF" H 3100 1350 50  0000 L CNN
F 2 "" H 3050 1450 60  0001 C CNN
F 3 "" H 3050 1450 60  0001 C CNN
	1    3050 1450
	1    0    0    -1  
$EndComp
$Comp
L CP1 C1
U 1 1 53677050
P 2450 1450
F 0 "C1" H 2500 1550 50  0000 L CNN
F 1 "4700uF" H 2500 1350 50  0000 L CNN
F 2 "" H 2450 1450 60  0001 C CNN
F 3 "" H 2450 1450 60  0001 C CNN
	1    2450 1450
	1    0    0    -1  
$EndComp
NoConn ~ 2150 3350
$Comp
L 78XXL IC1
U 1 1 53676F41
P 1700 1050
F 0 "IC1" H 1800 750 50  0000 L BNN
F 1 "7812L" H 1800 650 50  0000 L BNN
F 2 "v-reg-78XXL" H 1700 1200 50  0001 C CNN
F 3 "" H 1700 1050 60  0001 C CNN
	1    1700 1050
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR11
U 1 1 53676E6E
P 10300 3650
F 0 "#PWR11" H 10300 3650 30  0001 C CNN
F 1 "GND" H 10300 3580 30  0001 C CNN
F 2 "" H 10300 3650 60  0001 C CNN
F 3 "" H 10300 3650 60  0001 C CNN
	1    10300 3650
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR2
U 1 1 53676D25
P 3250 3100
F 0 "#PWR2" H 3250 3100 30  0001 C CNN
F 1 "GND" H 3250 3030 30  0001 C CNN
F 2 "" H 3250 3100 60  0001 C CNN
F 3 "" H 3250 3100 60  0001 C CNN
	1    3250 3100
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR10
U 1 1 536768D8
P 9800 6850
F 0 "#PWR10" H 9800 6850 30  0001 C CNN
F 1 "GND" H 9800 6780 30  0001 C CNN
F 2 "" H 9800 6850 60  0001 C CNN
F 3 "" H 9800 6850 60  0001 C CNN
	1    9800 6850
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR7
U 1 1 536768BB
P 8350 6850
F 0 "#PWR7" H 8350 6850 30  0001 C CNN
F 1 "GND" H 8350 6780 30  0001 C CNN
F 2 "" H 8350 6850 60  0001 C CNN
F 3 "" H 8350 6850 60  0001 C CNN
	1    8350 6850
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR6
U 1 1 536768A7
P 5050 6850
F 0 "#PWR6" H 5050 6850 30  0001 C CNN
F 1 "GND" H 5050 6780 30  0001 C CNN
F 2 "" H 5050 6850 60  0001 C CNN
F 3 "" H 5050 6850 60  0001 C CNN
	1    5050 6850
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR3
U 1 1 536768A3
P 4350 6850
F 0 "#PWR3" H 4350 6850 30  0001 C CNN
F 1 "GND" H 4350 6780 30  0001 C CNN
F 2 "" H 4350 6850 60  0001 C CNN
F 3 "" H 4350 6850 60  0001 C CNN
	1    4350 6850
	1    0    0    -1  
$EndComp
$Comp
L CP1 C10
U 1 1 5367688F
P 9450 5200
F 0 "C10" H 9500 5300 50  0000 L CNN
F 1 "1000uF" H 9500 5100 50  0000 L CNN
F 2 "" H 9450 5200 60  0001 C CNN
F 3 "" H 9450 5200 60  0001 C CNN
	1    9450 5200
	0    -1   -1   0   
$EndComp
$Comp
L R R12
U 1 1 53676889
P 9800 5700
F 0 "R12" V 9880 5700 50  0000 C CNN
F 1 "1K" V 9800 5700 50  0000 C CNN
F 2 "" H 9800 5700 60  0001 C CNN
F 3 "" H 9800 5700 60  0001 C CNN
	1    9800 5700
	1    0    0    -1  
$EndComp
$Comp
L R R9
U 1 1 5367687D
P 8600 6350
F 0 "R9" V 8680 6350 50  0000 C CNN
F 1 "10R" V 8600 6350 50  0000 C CNN
F 2 "" H 8600 6350 60  0001 C CNN
F 3 "" H 8600 6350 60  0001 C CNN
	1    8600 6350
	0    -1   -1   0   
$EndComp
$Comp
L LM317L IC2
U 1 1 53676873
P 8900 5750
F 0 "IC2" H 9000 5450 50  0000 L BNN
F 1 "LM317L" H 9000 5350 50  0000 L BNN
F 2 "v-reg-317L" H 8900 5900 50  0001 C CNN
F 3 "" H 8900 5750 60  0001 C CNN
	1    8900 5750
	0    1    1    0   
$EndComp
$Comp
L MOSFET_N Q1
U 1 1 5367686F
P 8800 4700
F 0 "Q1" H 8810 4870 60  0000 R CNN
F 1 "IRF540" H 8810 4550 60  0000 R CNN
F 2 "TO220" H 8800 4700 60  0001 C CNN
F 3 "" H 8800 4700 60  0001 C CNN
	1    8800 4700
	1    0    0    -1  
$EndComp
$Comp
L R R8
U 1 1 53676850
P 7550 3500
F 0 "R8" V 7630 3500 50  0000 C CNN
F 1 "2K2" V 7550 3500 50  0000 C CNN
F 2 "" H 7550 3500 60  0001 C CNN
F 3 "" H 7550 3500 60  0001 C CNN
	1    7550 3500
	1    0    0    -1  
$EndComp
$Comp
L C C8
U 1 1 536767A1
P 6900 4950
F 0 "C8" H 6950 5050 50  0000 L CNN
F 1 "474" H 6950 4850 50  0000 L CNN
F 2 "" H 6900 4950 60  0001 C CNN
F 3 "" H 6900 4950 60  0001 C CNN
	1    6900 4950
	0    -1   -1   0   
$EndComp
$Comp
L R R6
U 1 1 53676791
P 6900 4700
F 0 "R6" V 6980 4700 50  0000 C CNN
F 1 "1K" V 6900 4700 50  0000 C CNN
F 2 "" H 6900 4700 60  0001 C CNN
F 3 "" H 6900 4700 60  0001 C CNN
	1    6900 4700
	0    -1   -1   0   
$EndComp
$Comp
L CP1 C4
U 1 1 5367677A
P 3950 5500
F 0 "C4" H 4000 5600 50  0000 L CNN
F 1 "10uF" H 4000 5400 50  0000 L CNN
F 2 "" H 3950 5500 60  0001 C CNN
F 3 "" H 3950 5500 60  0001 C CNN
	1    3950 5500
	0    1    1    0   
$EndComp
$Comp
L R R1
U 1 1 5367675C
P 4350 6300
F 0 "R1" V 4430 6300 50  0000 C CNN
F 1 "100K" V 4350 6300 50  0000 C CNN
F 2 "" H 4350 6300 60  0001 C CNN
F 3 "" H 4350 6300 60  0001 C CNN
	1    4350 6300
	1    0    0    -1  
$EndComp
$Comp
L R R4
U 1 1 53676758
P 5050 6300
F 0 "R4" V 5130 6300 50  0000 C CNN
F 1 "150R" V 5050 6300 50  0000 C CNN
F 2 "" H 5050 6300 60  0001 C CNN
F 3 "" H 5050 6300 60  0001 C CNN
	1    5050 6300
	1    0    0    -1  
$EndComp
$Comp
L C C7
U 1 1 536765AB
P 6900 1950
F 0 "C7" H 6950 2050 50  0000 L CNN
F 1 "474" H 6950 1850 50  0000 L CNN
F 2 "" H 6900 1950 60  0001 C CNN
F 3 "" H 6900 1950 60  0001 C CNN
	1    6900 1950
	0    -1   -1   0   
$EndComp
$Comp
L C C9
U 1 1 53676567
P 7850 2950
F 0 "C9" H 7900 3050 50  0000 L CNN
F 1 "473" H 7900 2850 50  0000 L CNN
F 2 "" H 7850 2950 60  0001 C CNN
F 3 "" H 7850 2950 60  0001 C CNN
	1    7850 2950
	0    -1   -1   0   
$EndComp
$Comp
L R R7
U 1 1 53676545
P 7550 2500
F 0 "R7" V 7630 2500 50  0000 C CNN
F 1 "2K2" V 7550 2500 50  0000 C CNN
F 2 "" H 7550 2500 60  0001 C CNN
F 3 "" H 7550 2500 60  0001 C CNN
	1    7550 2500
	1    0    0    -1  
$EndComp
$Comp
L R R5
U 1 1 53676532
P 6900 1700
F 0 "R5" V 6980 1700 50  0000 C CNN
F 1 "1K" V 6900 1700 50  0000 C CNN
F 2 "" H 6900 1700 60  0001 C CNN
F 3 "" H 6900 1700 60  0001 C CNN
	1    6900 1700
	0    -1   -1   0   
$EndComp
$Comp
L GND #PWR9
U 1 1 536764C0
P 9800 3650
F 0 "#PWR9" H 9800 3650 30  0001 C CNN
F 1 "GND" H 9800 3580 30  0001 C CNN
F 2 "" H 9800 3650 60  0001 C CNN
F 3 "" H 9800 3650 60  0001 C CNN
	1    9800 3650
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR8
U 1 1 536764B2
P 8450 3650
F 0 "#PWR8" H 8450 3650 30  0001 C CNN
F 1 "GND" H 8450 3580 30  0001 C CNN
F 2 "" H 8450 3650 60  0001 C CNN
F 3 "" H 8450 3650 60  0001 C CNN
	1    8450 3650
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR4
U 1 1 536764A4
P 4500 3750
F 0 "#PWR4" H 4500 3750 30  0001 C CNN
F 1 "GND" H 4500 3680 30  0001 C CNN
F 2 "" H 4500 3750 60  0001 C CNN
F 3 "" H 4500 3750 60  0001 C CNN
	1    4500 3750
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR5
U 1 1 53676494
P 5050 3750
F 0 "#PWR5" H 5050 3750 30  0001 C CNN
F 1 "GND" H 5050 3680 30  0001 C CNN
F 2 "" H 5050 3750 60  0001 C CNN
F 3 "" H 5050 3750 60  0001 C CNN
	1    5050 3750
	1    0    0    -1  
$EndComp
$Comp
L LM317L IC3
U 1 1 53676180
P 9000 2750
F 0 "IC3" H 9100 2450 50  0000 L BNN
F 1 "LM317L" H 9100 2350 50  0000 L BNN
F 2 "v-reg-317L" H 9000 2900 50  0001 C CNN
F 3 "" H 9000 2750 60  0001 C CNN
	1    9000 2750
	0    1    1    0   
$EndComp
$Comp
L MOSFET_N Q2
U 1 1 53675533
P 8900 1700
F 0 "Q2" H 8910 1870 60  0000 R CNN
F 1 "IRF540" H 8910 1550 60  0000 R CNN
F 2 "TO220" H 8900 1700 60  0001 C CNN
F 3 "" H 8900 1700 60  0001 C CNN
	1    8900 1700
	1    0    0    -1  
$EndComp
$Comp
L CP1 C11
U 1 1 536754F1
P 9500 2200
F 0 "C11" H 9550 2300 50  0000 L CNN
F 1 "1000uF" H 9550 2100 50  0000 L CNN
F 2 "" H 9500 2200 60  0001 C CNN
F 3 "" H 9500 2200 60  0001 C CNN
	1    9500 2200
	0    -1   -1   0   
$EndComp
$Comp
L R R11
U 1 1 536754D9
P 9800 2700
F 0 "R11" V 9880 2700 50  0000 C CNN
F 1 "1K" V 9800 2700 50  0000 C CNN
F 2 "" H 9800 2700 60  0001 C CNN
F 3 "" H 9800 2700 60  0001 C CNN
	1    9800 2700
	1    0    0    -1  
$EndComp
$Comp
L R R10
U 1 1 536754BF
P 8700 3400
F 0 "R10" V 8780 3400 50  0000 C CNN
F 1 "10R" V 8700 3400 50  0000 C CNN
F 2 "" H 8700 3400 60  0001 C CNN
F 3 "" H 8700 3400 60  0001 C CNN
	1    8700 3400
	0    -1   -1   0   
$EndComp
$Comp
L R R3
U 1 1 536754A8
P 5050 3250
F 0 "R3" V 5130 3250 50  0000 C CNN
F 1 "150R" V 5050 3250 50  0000 C CNN
F 2 "" H 5050 3250 60  0001 C CNN
F 3 "" H 5050 3250 60  0001 C CNN
	1    5050 3250
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 5367549D
P 4500 3250
F 0 "R2" V 4580 3250 50  0000 C CNN
F 1 "100K" V 4500 3250 50  0000 C CNN
F 2 "" H 4500 3250 60  0001 C CNN
F 3 "" H 4500 3250 60  0001 C CNN
	1    4500 3250
	1    0    0    -1  
$EndComp
$Comp
L CP1 C3
U 1 1 5367536D
P 3950 2500
F 0 "C3" H 4000 2600 50  0000 L CNN
F 1 "10uF" H 4000 2400 50  0000 L CNN
F 2 "" H 3950 2500 60  0001 C CNN
F 3 "" H 3950 2500 60  0001 C CNN
	1    3950 2500
	0    1    1    0   
$EndComp
$Comp
L ECC81 U1
U 3 1 5367518D
P 2150 2900
F 0 "U1" H 2280 3210 50  0000 C CNN
F 1 "ECC82" H 2500 2600 50  0000 C CNN
F 2 "VALVE-NOVAL_P" H 2420 2500 50  0001 C CNN
F 3 "" H 2150 2900 60  0001 C CNN
	3    2150 2900
	1    0    0    -1  
$EndComp
$Comp
L ECC81 U1
U 1 1 53675156
P 5150 2500
F 0 "U1" H 5280 2810 50  0000 C CNN
F 1 "ECC82" H 5500 2200 50  0000 C CNN
F 2 "VALVE-NOVAL_P" H 5420 2100 50  0001 C CNN
F 3 "" H 5150 2500 60  0001 C CNN
	1    5150 2500
	1    0    0    -1  
$EndComp
$Comp
L ECC81 U1
U 2 1 53675143
P 5150 5500
F 0 "U1" H 5280 5810 50  0000 C CNN
F 1 "ECC82" H 5500 5200 50  0000 C CNN
F 2 "VALVE-NOVAL_P" H 5420 5100 50  0001 C CNN
F 3 "" H 5150 5500 60  0001 C CNN
	2    5150 5500
	1    0    0    -1  
$EndComp
Wire Wire Line
	7550 2950 7650 2950
Wire Wire Line
	6150 2850 5900 2850
Wire Wire Line
	5900 2850 5900 1950
Connection ~ 5900 1950
Wire Wire Line
	6150 3250 5900 3250
Wire Wire Line
	5900 3250 5900 4950
Connection ~ 5900 4950
Wire Wire Line
	7150 2850 7150 2150
Wire Wire Line
	7150 2150 7550 2150
Connection ~ 7550 2150
Wire Wire Line
	7150 3250 7150 3900
Wire Wire Line
	7150 3900 7550 3900
Connection ~ 7550 3900
Wire Wire Line
	8050 2950 8050 3400
Wire Wire Line
	8050 3400 8450 3400
$Comp
L SPST SW1
U 1 1 538AD560
P 6650 2850
F 0 "SW1" H 6650 2950 70  0000 C CNN
F 1 "SPST" H 6650 2750 70  0000 C CNN
F 2 "~" H 6650 2850 60  0000 C CNN
F 3 "~" H 6650 2850 60  0000 C CNN
	1    6650 2850
	1    0    0    -1  
$EndComp
$Comp
L SPST SW2
U 1 1 538AD56F
P 6650 3250
F 0 "SW2" H 6650 3350 70  0000 C CNN
F 1 "SPST" H 6650 3150 70  0000 C CNN
F 2 "~" H 6650 3250 60  0000 C CNN
F 3 "~" H 6650 3250 60  0000 C CNN
	1    6650 3250
	1    0    0    -1  
$EndComp
$Comp
L DIODE D?
U 1 1 539156DE
P 1100 1050
F 0 "D?" H 1100 1150 40  0000 C CNN
F 1 "DIODE" H 1100 950 40  0000 C CNN
F 2 "~" H 1100 1050 60  0000 C CNN
F 3 "~" H 1100 1050 60  0000 C CNN
	1    1100 1050
	1    0    0    -1  
$EndComp
Text Notes 10650 7650 0    60   ~ 0
0.1
Text Notes 7350 7550 0    60   ~ 0
Hybrid Headphone Amp https://github.com/xavpaice/hybridheadphoneamp
$EndSCHEMATC