EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr USLedger 17000 11000
encoding utf-8
Sheet 1 3
Title "OSI Interface"
Date "2019-08-25"
Rev "1.0"
Comp "OSIWeb.org"
Comment1 "Main Keyboard Interface"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Wire Wire Line
	2550 3900 2550 4900
$Comp
L power:GND #PWR04
U 1 1 5BCC068F
P 2550 4900
F 0 "#PWR04" H 2550 4650 50  0001 C CNN
F 1 "GND" H 2555 4727 50  0000 C CNN
F 2 "" H 2550 4900 50  0001 C CNN
F 3 "" H 2550 4900 50  0001 C CNN
	1    2550 4900
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR01
U 1 1 5BCC0E14
P 2400 3100
F 0 "#PWR01" H 2400 2950 50  0001 C CNN
F 1 "+5V" H 2415 3273 50  0000 C CNN
F 2 "" H 2400 3100 50  0001 C CNN
F 3 "" H 2400 3100 50  0001 C CNN
	1    2400 3100
	1    0    0    -1  
$EndComp
Entry Wire Line
	11100 3100 11200 3000
Entry Wire Line
	11100 3200 11200 3100
Entry Wire Line
	11100 3000 11200 2900
Entry Wire Line
	11100 3300 11200 3200
Entry Wire Line
	11100 3400 11200 3300
Entry Wire Line
	11100 3500 11200 3400
Entry Wire Line
	11100 3600 11200 3500
Entry Wire Line
	11100 3700 11200 3600
Entry Wire Line
	11200 2150 11300 2050
Entry Wire Line
	11200 2250 11300 2150
Entry Wire Line
	11200 2350 11300 2250
Entry Wire Line
	11200 2450 11300 2350
Entry Wire Line
	11200 2550 11300 2450
Entry Wire Line
	11200 2650 11300 2550
Entry Wire Line
	11200 2750 11300 2650
Entry Wire Line
	11200 3250 11300 3150
Entry Wire Line
	11200 3350 11300 3250
Entry Wire Line
	11200 3450 11300 3350
Entry Wire Line
	11200 3550 11300 3450
Entry Wire Line
	11200 2050 11300 1950
Entry Wire Line
	11200 2850 11300 2750
Entry Wire Line
	11200 2950 11300 2850
Entry Wire Line
	11200 3050 11300 2950
Entry Wire Line
	11200 3150 11300 3050
Text Label 11450 3050 0    50   ~ 0
Row4
Text Label 11450 2950 0    50   ~ 0
Row5
Text Label 11450 2850 0    50   ~ 0
Row6
Text Label 11450 2750 0    50   ~ 0
Row7
Wire Wire Line
	4900 1750 4900 1850
Wire Wire Line
	4900 1850 5100 1850
Wire Wire Line
	4900 1750 5100 1750
Wire Wire Line
	4900 1950 4900 2050
Wire Wire Line
	4900 2050 5100 2050
Wire Wire Line
	4900 1950 5100 1950
Wire Wire Line
	5100 2250 4900 2250
Wire Wire Line
	4900 2250 4900 2150
Wire Wire Line
	4900 2150 5100 2150
Wire Wire Line
	5100 2450 4900 2450
Wire Wire Line
	4900 2450 4900 2350
Wire Wire Line
	4900 2350 5100 2350
Wire Wire Line
	4900 4000 4900 4100
Wire Wire Line
	4900 4100 5100 4100
Connection ~ 4900 4000
Wire Wire Line
	4900 4000 5100 4000
Wire Wire Line
	4900 4200 4900 4300
Wire Wire Line
	4900 4300 5100 4300
Connection ~ 4900 4200
Wire Wire Line
	4900 4200 5100 4200
Wire Wire Line
	4900 4400 4900 4500
Wire Wire Line
	4900 4500 5100 4500
Connection ~ 4900 4400
Wire Wire Line
	4900 4400 5100 4400
Wire Wire Line
	4900 4600 4900 4700
Wire Wire Line
	4900 4700 5100 4700
Connection ~ 4900 4600
Wire Wire Line
	4900 4600 5100 4600
Wire Wire Line
	8550 1850 8550 3100
Wire Wire Line
	8450 2050 8450 3300
Wire Wire Line
	8450 4000 8450 3400
Wire Wire Line
	8500 4100 8500 3500
Wire Wire Line
	8550 4200 8550 3600
Wire Wire Line
	8600 4300 8600 3700
Text Label 6200 2650 0    50   ~ 0
Col0
Text Label 6200 2550 0    50   ~ 0
Col1
Text Label 6200 2450 0    50   ~ 0
Col2
Text Label 6200 2350 0    50   ~ 0
Col3
Text Label 6250 4900 0    50   ~ 0
Col4
Text Label 6250 4800 0    50   ~ 0
Col5
Text Label 6250 4700 0    50   ~ 0
Col6
Text Label 6250 4600 0    50   ~ 0
Col7
Entry Wire Line
	7400 2350 7500 2450
Entry Wire Line
	7400 2550 7500 2650
Entry Wire Line
	7400 2650 7500 2750
Entry Wire Line
	7400 2450 7500 2550
$Comp
L power:+5V #PWR06
U 1 1 5BF3C034
P 5600 1250
F 0 "#PWR06" H 5600 1100 50  0001 C CNN
F 1 "+5V" H 5615 1423 50  0000 C CNN
F 2 "" H 5600 1250 50  0001 C CNN
F 3 "" H 5600 1250 50  0001 C CNN
	1    5600 1250
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR08
U 1 1 5BF3C078
P 5600 3650
F 0 "#PWR08" H 5600 3500 50  0001 C CNN
F 1 "+5V" H 5615 3823 50  0000 C CNN
F 2 "" H 5600 3650 50  0001 C CNN
F 3 "" H 5600 3650 50  0001 C CNN
	1    5600 3650
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR012
U 1 1 5BF3C0BC
P 9250 2650
F 0 "#PWR012" H 9250 2500 50  0001 C CNN
F 1 "+5V" H 9265 2823 50  0000 C CNN
F 2 "" H 9250 2650 50  0001 C CNN
F 3 "" H 9250 2650 50  0001 C CNN
	1    9250 2650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR013
U 1 1 5BF3C258
P 9250 4400
F 0 "#PWR013" H 9250 4150 50  0001 C CNN
F 1 "GND" H 9255 4227 50  0000 C CNN
F 2 "" H 9250 4400 50  0001 C CNN
F 3 "" H 9250 4400 50  0001 C CNN
	1    9250 4400
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR09
U 1 1 5BF42928
P 5600 5400
F 0 "#PWR09" H 5600 5150 50  0001 C CNN
F 1 "GND" H 5605 5227 50  0000 C CNN
F 2 "" H 5600 5400 50  0001 C CNN
F 3 "" H 5600 5400 50  0001 C CNN
	1    5600 5400
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR07
U 1 1 5BF48F7E
P 5600 3150
F 0 "#PWR07" H 5600 2900 50  0001 C CNN
F 1 "GND" H 5605 2977 50  0000 C CNN
F 2 "" H 5600 3150 50  0001 C CNN
F 3 "" H 5600 3150 50  0001 C CNN
	1    5600 3150
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR011
U 1 1 5BF5C280
P 8750 4100
F 0 "#PWR011" H 8750 3850 50  0001 C CNN
F 1 "GND" H 8755 3927 50  0000 C CNN
F 2 "" H 8750 4100 50  0001 C CNN
F 3 "" H 8750 4100 50  0001 C CNN
	1    8750 4100
	1    0    0    -1  
$EndComp
Wire Wire Line
	5600 3050 5600 3100
Wire Wire Line
	9250 4300 9250 4400
Wire Wire Line
	9250 2700 9250 2650
Wire Wire Line
	8750 4100 8750 4000
$Comp
L Device:R_Network08_US RN1
U 1 1 5C0319BC
P 7000 1350
F 0 "RN1" H 7380 1396 50  0000 L CNN
F 1 "4.7k" H 7380 1305 50  0000 L CNN
F 2 "Resistor_THT:R_Array_SIP9" V 7475 1350 50  0001 C CNN
F 3 "http://www.vishay.com/docs/31509/csc.pdf" H 7000 1350 50  0001 C CNN
	1    7000 1350
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR010
U 1 1 5C031A36
P 6600 1050
F 0 "#PWR010" H 6600 900 50  0001 C CNN
F 1 "+5V" H 6615 1223 50  0000 C CNN
F 2 "" H 6600 1050 50  0001 C CNN
F 3 "" H 6600 1050 50  0001 C CNN
	1    6600 1050
	1    0    0    -1  
$EndComp
Wire Wire Line
	6600 1050 6600 1150
Wire Wire Line
	5600 1250 5600 1450
Wire Wire Line
	5600 3650 5600 3700
Wire Wire Line
	8600 1750 8600 3000
Text Label 10800 3000 0    50   ~ 0
Row0
Text Label 10800 3100 0    50   ~ 0
Row1
Text Label 10800 3200 0    50   ~ 0
Row2
Text Label 10800 3300 0    50   ~ 0
Row3
Text Label 10800 3400 0    50   ~ 0
Row4
Text Label 10800 3500 0    50   ~ 0
Row5
Text Label 10800 3600 0    50   ~ 0
Row6
Text Label 10800 3700 0    50   ~ 0
Row7
Connection ~ 4900 2350
Connection ~ 4900 2150
Connection ~ 4900 1950
Connection ~ 4900 1750
Wire Wire Line
	2400 4700 2400 3100
$Comp
L Connector_Generic:Conn_02x20_Odd_Even J2
U 1 1 5D1EDC84
P 12200 2750
F 0 "J2" H 12230 3760 50  0000 C CNN
F 1 "Key Matrix" H 12270 1660 50  0000 C CNN
F 2 "Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical" H 12200 2750 50  0001 C CNN
F 3 "~" H 12200 2750 50  0001 C CNN
	1    12200 2750
	1    0    0    -1  
$EndComp
Text Label 11450 3150 0    50   ~ 0
Row3
Text Label 11450 3250 0    50   ~ 0
Row2
Text Label 11450 3350 0    50   ~ 0
Row1
Text Label 11450 3450 0    50   ~ 0
Row0
Text Label 11450 1950 0    50   ~ 0
Col7
Text Label 11450 2050 0    50   ~ 0
Col6
Text Label 11450 2150 0    50   ~ 0
Col5
Text Label 11450 2250 0    50   ~ 0
Col4
Text Label 11450 2350 0    50   ~ 0
Col3
Text Label 11450 2450 0    50   ~ 0
Col2
Text Label 11450 2550 0    50   ~ 0
Col1
Text Label 11450 2650 0    50   ~ 0
Col0
Wire Wire Line
	11300 1950 12000 1950
Wire Wire Line
	11300 2050 12000 2050
Wire Wire Line
	11300 2150 12000 2150
Wire Wire Line
	11300 2250 12000 2250
Wire Wire Line
	11300 2350 12000 2350
Wire Wire Line
	11300 2450 12000 2450
Wire Wire Line
	11300 2550 12000 2550
Wire Wire Line
	11300 2650 12000 2650
Wire Wire Line
	11300 2750 12000 2750
Wire Wire Line
	11300 2850 12000 2850
Wire Wire Line
	11300 2950 12000 2950
Wire Wire Line
	11300 3050 12000 3050
Wire Wire Line
	11300 3150 12000 3150
Wire Wire Line
	11300 3250 12000 3250
Wire Wire Line
	11300 3350 12000 3350
Wire Wire Line
	11300 3450 12000 3450
Wire Wire Line
	8750 3300 8450 3300
Wire Wire Line
	8750 3200 8500 3200
Wire Wire Line
	8500 1950 8500 3200
Wire Wire Line
	8550 3100 8750 3100
Wire Wire Line
	8600 3000 8750 3000
Wire Wire Line
	8750 3400 8450 3400
Wire Wire Line
	8750 3500 8500 3500
Wire Wire Line
	8750 3600 8550 3600
Wire Wire Line
	8600 3700 8750 3700
Wire Wire Line
	8750 3900 8650 3900
$Comp
L unikbd:74HC240 U3
U 1 1 5ECDC3B9
P 5600 2250
F 0 "U3" H 5400 3000 50  0000 C CNN
F 1 "74HC240" H 5300 2900 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 5600 2250 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/74HC_HCT240.pdf" H 5600 2250 50  0001 C CNN
	1    5600 2250
	1    0    0    -1  
$EndComp
$Comp
L unikbd:74HC240 U4
U 1 1 5ECEC661
P 5600 4500
F 0 "U4" H 5400 5300 50  0000 C CNN
F 1 "74HC240" H 5300 5200 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 5600 4500 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/74HC_HCT240.pdf" H 5600 4500 50  0001 C CNN
	1    5600 4500
	1    0    0    -1  
$EndComp
Entry Wire Line
	7400 4900 7500 5000
Entry Wire Line
	7400 4800 7500 4900
Entry Wire Line
	7400 4700 7500 4800
Entry Wire Line
	7400 4600 7500 4700
$Comp
L 74xx:74LS373 U5
U 1 1 5EE34D09
P 9250 3500
F 0 "U5" H 9400 4150 50  0000 C CNN
F 1 "74LS373" H 9000 4150 50  0000 C CNN
F 2 "Package_DIP:DIP-20_W7.62mm" H 9250 3500 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS373" H 9250 3500 50  0001 C CNN
	1    9250 3500
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS138 U1
U 1 1 5EE9FB59
P 3200 7000
F 0 "U1" H 3000 7600 50  0000 C CNN
F 1 "74LS138" H 2900 7500 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm" H 3200 7000 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS138" H 3200 7000 50  0001 C CNN
	1    3200 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	2200 6700 2700 6700
Wire Wire Line
	2100 6800 2700 6800
Wire Wire Line
	2000 6900 2700 6900
Wire Wire Line
	2300 7400 2700 7400
$Comp
L power:GND #PWR05
U 1 1 5EF3D06A
P 3200 7700
F 0 "#PWR05" H 3200 7450 50  0001 C CNN
F 1 "GND" H 3205 7527 50  0000 C CNN
F 2 "" H 3200 7700 50  0001 C CNN
F 3 "" H 3200 7700 50  0001 C CNN
	1    3200 7700
	1    0    0    -1  
$EndComp
Connection ~ 3200 7700
$Comp
L 74xx:74LS04 U2
U 2 1 5EF63528
P 4400 7100
F 0 "U2" H 4450 7250 50  0000 C CNN
F 1 "74LS04" H 4600 7000 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 4400 7100 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS04" H 4400 7100 50  0001 C CNN
	2    4400 7100
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS04 U2
U 4 1 5EF84CE1
P 4400 8300
F 0 "U2" H 4500 8450 50  0000 C CNN
F 1 "74LS04" H 4600 8150 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 4400 8300 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS04" H 4400 8300 50  0001 C CNN
	4    4400 8300
	1    0    0    -1  
$EndComp
Wire Wire Line
	3700 6900 3900 6900
Wire Wire Line
	3900 6900 3900 6600
Wire Wire Line
	3700 7400 3950 7400
Wire Wire Line
	3950 7400 3950 7700
$Comp
L Connector_Generic:Conn_01x16 J1
U 1 1 5F2900DF
P 1300 3900
F 0 "J1" H 1310 4710 50  0000 C CNN
F 1 "KBD port" H 1280 2980 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 1300 3900 50  0001 C CNN
F 3 "~" H 1300 3900 50  0001 C CNN
	1    1300 3900
	-1   0    0    -1  
$EndComp
Wire Wire Line
	1500 3900 2550 3900
Text Label 1600 4100 0    50   ~ 0
R-~W
Text Label 1600 4000 0    50   ~ 0
D7
Text Label 1600 3800 0    50   ~ 0
D6
Text Label 1600 3700 0    50   ~ 0
D5
Text Label 1600 3600 0    50   ~ 0
D4
Text Label 1600 3500 0    50   ~ 0
D3
Text Label 1600 3400 0    50   ~ 0
D2
Text Label 1600 3300 0    50   ~ 0
D1
Text Label 1600 3200 0    50   ~ 0
D0
Text Label 1600 3900 0    50   ~ 0
GND
Text Label 1600 4400 0    50   ~ 0
~KBE
Text Label 1600 4300 0    50   ~ 0
~A1
Text Label 1600 4200 0    50   ~ 0
~A0
Wire Wire Line
	1500 4200 2200 4200
Wire Wire Line
	1500 4300 2100 4300
Wire Wire Line
	1500 4500 1900 4500
Wire Wire Line
	1500 4600 1800 4600
Text Label 1600 4500 0    50   ~ 0
NI
Text Label 1600 4600 0    50   ~ 0
~S1
Wire Wire Line
	1500 4700 2400 4700
Wire Wire Line
	1500 4400 2300 4400
Wire Wire Line
	1500 4100 2000 4100
Text Label 1550 4700 0    50   ~ 0
+5V
Wire Wire Line
	3700 3600 1500 3600
Wire Wire Line
	1800 4600 1800 8300
Wire Wire Line
	1900 4500 1900 8000
Wire Wire Line
	2300 4400 2300 7400
Wire Wire Line
	2100 4300 2100 6800
Wire Wire Line
	2200 4200 2200 6700
Wire Wire Line
	2000 4100 2000 6900
Entry Wire Line
	11200 5400 11300 5500
Entry Wire Line
	11200 5300 11300 5400
Entry Wire Line
	11200 5200 11300 5300
Entry Wire Line
	11200 5100 11300 5200
Entry Wire Line
	11200 5000 11300 5100
Entry Wire Line
	11200 4900 11300 5000
Entry Wire Line
	11200 4800 11300 4900
Entry Wire Line
	11200 4300 11300 4400
Entry Wire Line
	11200 4200 11300 4300
Entry Wire Line
	11200 4100 11300 4200
Entry Wire Line
	11200 4000 11300 4100
Entry Wire Line
	11200 5500 11300 5600
Entry Wire Line
	11200 4700 11300 4800
Entry Wire Line
	11200 4600 11300 4700
Entry Wire Line
	11200 4500 11300 4600
Entry Wire Line
	11200 4400 11300 4500
$Comp
L Connector_Generic:Conn_01x16 J3
U 1 1 5F47E8A6
P 12660 4800
F 0 "J3" H 12650 5610 50  0000 C CNN
F 1 "Expansion" H 12530 3900 50  0000 C CNN
F 2 "Package_DIP:DIP-16_W7.62mm_Socket" H 12660 4800 50  0001 C CNN
F 3 "~" H 12660 4800 50  0001 C CNN
	1    12660 4800
	1    0    0    -1  
$EndComp
Wire Wire Line
	11300 5600 12460 5600
Wire Wire Line
	11300 5500 12460 5500
Wire Wire Line
	11300 5400 12460 5400
Wire Wire Line
	11300 5300 12460 5300
Wire Wire Line
	11300 5200 12460 5200
Wire Wire Line
	11300 5100 12460 5100
Wire Wire Line
	11300 5000 12460 5000
Wire Wire Line
	11300 4900 12460 4900
Wire Wire Line
	11300 4800 12460 4800
Wire Wire Line
	11300 4700 12460 4700
Wire Wire Line
	11300 4600 12460 4600
Wire Wire Line
	11300 4500 12460 4500
Wire Wire Line
	11300 4400 12460 4400
Wire Wire Line
	11300 4300 12460 4300
Wire Wire Line
	11300 4200 12460 4200
Wire Wire Line
	11300 4100 12460 4100
Text Label 11450 4900 0    50   ~ 0
Col0
Text Label 11450 5000 0    50   ~ 0
Col1
Text Label 11450 5100 0    50   ~ 0
Col2
Text Label 11450 5200 0    50   ~ 0
Col3
Text Label 11450 5300 0    50   ~ 0
Col4
Text Label 11450 5400 0    50   ~ 0
Col5
Text Label 11450 5500 0    50   ~ 0
Col6
Text Label 11450 5600 0    50   ~ 0
Col7
Text Label 11450 4100 0    50   ~ 0
Row0
Text Label 11450 4200 0    50   ~ 0
Row1
Text Label 11450 4300 0    50   ~ 0
Row2
Text Label 11450 4400 0    50   ~ 0
Row3
Text Label 11450 4800 0    50   ~ 0
Row7
Text Label 11450 4700 0    50   ~ 0
Row6
Text Label 11450 4600 0    50   ~ 0
Row5
Text Label 11450 4500 0    50   ~ 0
Row4
Wire Bus Line
	7500 5800 11200 5800
Wire Wire Line
	9750 3700 10150 3700
Wire Wire Line
	10450 3700 11100 3700
Wire Wire Line
	10150 3600 11100 3600
Wire Wire Line
	9850 3600 9750 3600
Wire Wire Line
	9750 3500 10150 3500
Wire Wire Line
	9850 3400 9750 3400
Wire Wire Line
	9750 3300 10150 3300
Wire Wire Line
	9850 3200 9750 3200
Wire Wire Line
	9750 3100 10200 3100
Wire Wire Line
	9900 3000 9750 3000
Wire Wire Line
	10200 3000 11100 3000
Wire Wire Line
	10500 3100 11100 3100
Wire Wire Line
	10150 3200 11100 3200
Wire Wire Line
	10450 3300 11100 3300
Wire Wire Line
	10150 3400 11100 3400
Wire Wire Line
	10450 3500 11100 3500
Wire Wire Line
	2700 7300 2650 7300
Wire Wire Line
	2650 7300 2650 7700
Wire Wire Line
	2650 7700 3200 7700
Connection ~ 5600 3100
Wire Wire Line
	5600 3100 5600 3150
Wire Wire Line
	5100 2650 4800 2650
Wire Wire Line
	4800 2650 4800 4900
Wire Wire Line
	5100 4900 4800 4900
Connection ~ 4800 4900
Wire Wire Line
	5050 3100 5600 3100
Wire Wire Line
	5050 3100 5050 2750
Wire Wire Line
	5050 2750 5100 2750
Wire Wire Line
	5600 5300 5600 5350
Wire Wire Line
	5600 5350 5050 5350
Wire Wire Line
	5050 5350 5050 5000
Wire Wire Line
	5050 5000 5100 5000
Connection ~ 5600 5350
Wire Wire Line
	5600 5350 5600 5400
Wire Wire Line
	8650 3900 8650 7500
Wire Wire Line
	3250 3200 3250 1750
Wire Wire Line
	1500 3200 3250 3200
Wire Wire Line
	3250 1750 4900 1750
Wire Wire Line
	3400 1950 3400 3300
Wire Wire Line
	3400 1950 4900 1950
Wire Wire Line
	1500 3300 3400 3300
Wire Wire Line
	3550 3400 3550 2150
Wire Wire Line
	3550 2150 4900 2150
Wire Wire Line
	1500 3400 3550 3400
Wire Wire Line
	3700 2350 3700 3500
Wire Wire Line
	3700 2350 4900 2350
Wire Wire Line
	1500 3500 3700 3500
Wire Wire Line
	3700 3600 3700 4000
Wire Wire Line
	3700 4000 4900 4000
Wire Wire Line
	3550 3700 3550 4200
Wire Wire Line
	1500 3700 3550 3700
Wire Wire Line
	3550 4200 4900 4200
Wire Wire Line
	3400 3800 3400 4400
Wire Wire Line
	1500 3800 3400 3800
Wire Wire Line
	3400 4400 4900 4400
Wire Wire Line
	3250 4000 3250 4600
Wire Wire Line
	1500 4000 3250 4000
Wire Wire Line
	3250 4600 4900 4600
Wire Wire Line
	1900 8000 10400 8000
Wire Wire Line
	6100 4000 7950 4000
Wire Wire Line
	6100 2050 8050 2050
Wire Wire Line
	6100 1950 8150 1950
Wire Wire Line
	6100 1850 8250 1850
Wire Wire Line
	6100 4100 7850 4100
Wire Wire Line
	6100 4200 7750 4200
Wire Wire Line
	6100 4300 7650 4300
Wire Wire Line
	8250 1850 8250 6750
Connection ~ 8250 1850
Wire Wire Line
	8250 1850 8550 1850
Wire Wire Line
	8150 1950 8150 6850
Wire Wire Line
	8150 6850 10400 6850
Connection ~ 8150 1950
Wire Wire Line
	8150 1950 8500 1950
Wire Wire Line
	8050 2050 8050 6950
Wire Wire Line
	8050 6950 10400 6950
Connection ~ 8050 2050
Wire Wire Line
	8050 2050 8450 2050
Wire Wire Line
	7950 4000 7950 7050
Wire Wire Line
	7950 7050 10400 7050
Connection ~ 7950 4000
Wire Wire Line
	7950 4000 8450 4000
Wire Wire Line
	7850 4100 7850 7150
Wire Wire Line
	7850 7150 10400 7150
Connection ~ 7850 4100
Wire Wire Line
	7850 4100 8500 4100
Wire Wire Line
	7750 4200 7750 7250
Wire Wire Line
	7750 7250 10400 7250
Connection ~ 7750 4200
Wire Wire Line
	7750 4200 8550 4200
Wire Wire Line
	7650 4300 7650 7350
Wire Wire Line
	7650 7350 10400 7350
Connection ~ 7650 4300
Wire Wire Line
	7650 4300 8600 4300
Wire Wire Line
	8350 1750 8600 1750
Connection ~ 8350 1750
Wire Wire Line
	6100 1750 8350 1750
Wire Wire Line
	8350 1750 8350 6650
Wire Wire Line
	3700 7000 3900 7000
Wire Wire Line
	3900 7000 3900 7100
Wire Wire Line
	3900 7100 4100 7100
Wire Wire Line
	4800 4900 4800 6600
Wire Wire Line
	4700 6600 4800 6600
Wire Wire Line
	3900 6600 4100 6600
$Comp
L 74xx:74LS04 U2
U 1 1 5EF5DD97
P 4400 6600
F 0 "U2" H 4450 6750 50  0000 C CNN
F 1 "74LS04" H 4450 6450 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 4400 6600 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS04" H 4400 6600 50  0001 C CNN
	1    4400 6600
	1    0    0    -1  
$EndComp
Wire Wire Line
	4700 7100 7050 7100
Wire Wire Line
	7050 7100 7050 7500
Wire Wire Line
	7050 7500 8650 7500
Entry Wire Line
	13000 7200 13100 7300
Entry Wire Line
	13000 7100 13100 7200
Entry Wire Line
	13000 7000 13100 7100
Entry Wire Line
	13000 6900 13100 7000
Entry Wire Line
	13000 6800 13100 6900
Entry Wire Line
	13000 6700 13100 6800
Entry Wire Line
	13000 7300 13100 7400
Text Label 13250 6800 0    50   ~ 0
Col1
Text Label 13250 6900 0    50   ~ 0
Col2
Text Label 13250 7000 0    50   ~ 0
Col3
Text Label 13250 7100 0    50   ~ 0
Col4
Text Label 13250 7200 0    50   ~ 0
Col5
Text Label 13250 7300 0    50   ~ 0
Col6
Text Label 13250 7400 0    50   ~ 0
Col7
Wire Bus Line
	11200 5800 13000 5800
Connection ~ 11200 5800
Entry Wire Line
	13000 6500 13100 6600
Entry Wire Line
	13000 6600 13100 6700
Text Label 13250 6600 0    50   ~ 0
Row1
Text Label 13250 6700 0    50   ~ 0
Row7
Wire Wire Line
	12100 7500 14300 7500
Wire Wire Line
	12100 7700 14300 7700
Wire Wire Line
	13100 6600 14300 6600
Wire Wire Line
	13100 6700 14300 6700
Wire Wire Line
	13100 6800 14300 6800
Wire Wire Line
	13100 6900 14300 6900
Wire Wire Line
	13100 7000 14300 7000
Wire Wire Line
	13100 7100 14300 7100
Wire Wire Line
	13100 7200 14300 7200
Wire Wire Line
	13100 7300 14300 7300
Wire Wire Line
	13100 7400 14300 7400
$Comp
L power:GND #PWR014
U 1 1 609E5C10
P 12800 8100
F 0 "#PWR014" H 12800 7850 50  0001 C CNN
F 1 "GND" H 12805 7927 50  0000 C CNN
F 2 "" H 12800 8100 50  0001 C CNN
F 3 "" H 12800 8100 50  0001 C CNN
	1    12800 8100
	1    0    0    -1  
$EndComp
Wire Wire Line
	12800 8100 12800 7600
Wire Wire Line
	12800 7600 14300 7600
$Comp
L Connector_Generic:Conn_01x12 J4
U 1 1 60A345E3
P 14500 7100
F 0 "J4" H 14460 7720 50  0000 L CNN
F 1 "Sound" H 14180 6390 50  0000 L CNN
F 2 "Connector_Molex:Molex_KK-396_A-41791-0012_1x12_P3.96mm_Vertical" H 14500 7100 50  0001 C CNN
F 3 "~" H 14500 7100 50  0001 C CNN
	1    14500 7100
	1    0    0    -1  
$EndComp
Wire Wire Line
	3950 7700 4100 7700
$Comp
L 74xx:74LS04 U2
U 3 1 5EF73E4B
P 4400 7700
F 0 "U2" H 4450 7850 50  0000 C CNN
F 1 "74LS04" H 4500 7550 50  0000 C CNN
F 2 "Package_DIP:DIP-14_W7.62mm" H 4400 7700 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS04" H 4400 7700 50  0001 C CNN
	3    4400 7700
	1    0    0    -1  
$EndComp
Wire Wire Line
	8250 6750 10400 6750
Wire Wire Line
	8350 6650 10400 6650
$Sheet
S 10400 6250 1700 2400
U 6013A2E7
F0 "Sound" 50
F1 "Sound.sch" 50
F2 "KD0" I L 10400 6650 50 
F3 "KD1" I L 10400 6750 50 
F4 "KD2" I L 10400 6850 50 
F5 "KD3" I L 10400 6950 50 
F6 "KD4" I L 10400 7050 50 
F7 "KD5" I L 10400 7150 50 
F8 "KD6" I L 10400 7250 50 
F9 "KD7" I L 10400 7350 50 
F10 "NI" I L 10400 8000 50 
F11 "S1" I L 10400 8300 50 
F12 "Noise1" O R 12100 7700 50 
F13 "Noise2" O R 12100 7500 50 
F14 "SOUND_EN" I L 10400 7700 50 
$EndSheet
Wire Wire Line
	4700 7700 10400 7700
Entry Wire Line
	12800 1500 12900 1600
Entry Wire Line
	12800 1600 12900 1700
Text Label 13000 1600 0    50   ~ 0
Col0
Wire Bus Line
	11200 1150 12800 1150
NoConn ~ 12500 3050
NoConn ~ 12500 3150
NoConn ~ 12500 3250
NoConn ~ 12500 3350
NoConn ~ 12500 3450
NoConn ~ 12500 3550
NoConn ~ 12500 3650
NoConn ~ 12500 3750
NoConn ~ 12000 3750
NoConn ~ 12000 3650
NoConn ~ 12000 3550
NoConn ~ 12500 2950
NoConn ~ 12500 2850
NoConn ~ 12500 1850
NoConn ~ 12500 1950
NoConn ~ 12500 2050
NoConn ~ 12500 2150
Text Label 13000 1700 0    50   ~ 0
Row0
$Sheet
S 13400 1200 1600 2200
U 5D770C6B
F0 "special_keys" 50
F1 "special_keys.sch" 50
F2 "~RESET" I R 15000 1700 50 
F3 "Col0" I L 13400 1600 50 
F4 "Row0" O L 13400 1700 50 
F5 "ShiftLock_1" U L 13400 2250 50 
F6 "ShiftLock_2" U L 13400 2350 50 
F7 "ShiftLock_LED+" O L 13400 2450 50 
F8 "ShiftLock_LED-" O L 13400 2550 50 
F9 "Break_1" U L 13400 2650 50 
F10 "Break_2" U L 13400 2750 50 
$EndSheet
Wire Wire Line
	12900 1600 13400 1600
Wire Wire Line
	12900 1700 13400 1700
Wire Wire Line
	12500 2250 13400 2250
Wire Wire Line
	12500 2350 13400 2350
Wire Wire Line
	12500 2450 13400 2450
Wire Wire Line
	12500 2550 13400 2550
Wire Wire Line
	12500 2650 13400 2650
Wire Wire Line
	12500 2750 13400 2750
Text Notes 5940 9100 0    50   ~ 0
S1 is from Video timing chain.  \n- To enable sound on a 540A board, Jumper the\n   S1 signal (Pin 13 of E4) to pin 15 of the keyboard \n   connector, and set JP1 to “S1”\n\n- For 540B board, set jumper JP1 to “~S1~”
$Comp
L Connector_Generic:Conn_01x02 J5
U 1 1 5EC9C46D
P 15750 1700
F 0 "J5" H 15700 1800 50  0000 L CNN
F 1 "~RESET~" H 15650 1450 50  0000 L CNN
F 2 "Connector_Molex:Molex_KK-396_A-41791-0002_1x02_P3.96mm_Vertical" H 15750 1700 50  0001 C CNN
F 3 "~" H 15750 1700 50  0001 C CNN
	1    15750 1700
	1    0    0    -1  
$EndComp
Wire Wire Line
	15000 1700 15550 1700
$Comp
L power:GND #PWR036
U 1 1 5ECBC368
P 15400 1950
F 0 "#PWR036" H 15400 1700 50  0001 C CNN
F 1 "GND" H 15405 1777 50  0000 C CNN
F 2 "" H 15400 1950 50  0001 C CNN
F 3 "" H 15400 1950 50  0001 C CNN
	1    15400 1950
	1    0    0    -1  
$EndComp
Wire Wire Line
	15400 1950 15400 1800
Wire Wire Line
	15400 1800 15550 1800
Wire Wire Line
	7000 1550 7000 4900
Wire Wire Line
	7100 1550 7100 4800
Wire Wire Line
	7200 1550 7200 4700
Wire Wire Line
	7300 1550 7300 4600
Wire Wire Line
	6100 2550 6700 2550
Wire Wire Line
	6700 1550 6700 2550
Wire Wire Line
	6600 1550 6600 2650
Wire Wire Line
	6800 1550 6800 2450
Wire Wire Line
	6900 1550 6900 2350
Connection ~ 6900 2350
Wire Wire Line
	6900 2350 7400 2350
Wire Wire Line
	6100 2350 6900 2350
Connection ~ 6700 2550
Wire Wire Line
	6700 2550 7400 2550
Connection ~ 6600 2650
Wire Wire Line
	6600 2650 7400 2650
Wire Wire Line
	6100 2650 6600 2650
Connection ~ 6800 2450
Wire Wire Line
	6800 2450 7400 2450
Wire Wire Line
	6100 2450 6800 2450
Wire Wire Line
	6100 4900 7000 4900
Wire Wire Line
	6100 4800 7100 4800
Wire Wire Line
	6100 4700 7200 4700
Wire Wire Line
	6100 4600 7300 4600
Connection ~ 7300 4600
Wire Wire Line
	7300 4600 7400 4600
Connection ~ 7200 4700
Wire Wire Line
	7200 4700 7400 4700
Connection ~ 7100 4800
Wire Wire Line
	7100 4800 7400 4800
Connection ~ 7000 4900
Wire Wire Line
	7000 4900 7400 4900
$Comp
L power:GND #PWR03
U 1 1 5BFDC5C9
P 1350 10150
F 0 "#PWR03" H 1350 9900 50  0001 C CNN
F 1 "GND" H 1355 9977 50  0000 C CNN
F 2 "" H 1350 10150 50  0001 C CNN
F 3 "" H 1350 10150 50  0001 C CNN
	1    1350 10150
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR02
U 1 1 5BFDC5C3
P 1350 9550
F 0 "#PWR02" H 1350 9400 50  0001 C CNN
F 1 "+5V" H 1365 9723 50  0000 C CNN
F 2 "" H 1350 9550 50  0001 C CNN
F 3 "" H 1350 9550 50  0001 C CNN
	1    1350 9550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 10000 5900 10000
Wire Wire Line
	5500 9700 5900 9700
$Comp
L Device:C C11
U 1 1 61CE6393
P 5900 9850
F 0 "C11" H 6015 9896 50  0000 L CNN
F 1 "0.1 uF" H 5950 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 5938 9700 50  0001 C CNN
F 3 "~" H 5900 9850 50  0001 C CNN
	1    5900 9850
	1    0    0    -1  
$EndComp
Wire Wire Line
	5100 10000 5500 10000
Wire Wire Line
	5100 9700 5500 9700
$Comp
L Device:C C10
U 1 1 61CE638B
P 5500 9850
F 0 "C10" H 5615 9896 50  0000 L CNN
F 1 "0.1 uF" H 5550 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 5538 9700 50  0001 C CNN
F 3 "~" H 5500 9850 50  0001 C CNN
	1    5500 9850
	1    0    0    -1  
$EndComp
Wire Wire Line
	4700 10000 5100 10000
Wire Wire Line
	4700 9700 5100 9700
$Comp
L Device:C C9
U 1 1 606D38CE
P 5100 9850
F 0 "C9" H 5215 9896 50  0000 L CNN
F 1 "0.1uF" H 5150 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 5138 9700 50  0001 C CNN
F 3 "~" H 5100 9850 50  0001 C CNN
	1    5100 9850
	1    0    0    -1  
$EndComp
Connection ~ 3150 10000
Wire Wire Line
	3150 10000 3500 10000
Connection ~ 3150 9700
Wire Wire Line
	3150 9700 3500 9700
Connection ~ 3500 9700
Wire Wire Line
	4300 10000 4700 10000
Connection ~ 4300 10000
Wire Wire Line
	3900 10000 4300 10000
Connection ~ 3900 10000
Wire Wire Line
	3500 10000 3900 10000
Connection ~ 3500 10000
Wire Wire Line
	4300 9700 4700 9700
Connection ~ 4300 9700
Wire Wire Line
	3900 9700 4300 9700
Connection ~ 3900 9700
Wire Wire Line
	3500 9700 3900 9700
$Comp
L Device:C C8
U 1 1 6064F329
P 4700 9850
F 0 "C8" H 4815 9896 50  0000 L CNN
F 1 "0.1uF" H 4800 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 4738 9700 50  0001 C CNN
F 3 "~" H 4700 9850 50  0001 C CNN
	1    4700 9850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C7
U 1 1 6064F323
P 4300 9850
F 0 "C7" H 4415 9896 50  0000 L CNN
F 1 "0.1uF" H 4350 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 4338 9700 50  0001 C CNN
F 3 "~" H 4300 9850 50  0001 C CNN
	1    4300 9850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C6
U 1 1 6064F31D
P 3900 9850
F 0 "C6" H 4015 9896 50  0000 L CNN
F 1 "0.1uF" H 3950 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 3938 9700 50  0001 C CNN
F 3 "~" H 3900 9850 50  0001 C CNN
	1    3900 9850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C5
U 1 1 6064F317
P 3500 9850
F 0 "C5" H 3615 9896 50  0000 L CNN
F 1 "0.1uF" H 3550 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 3538 9700 50  0001 C CNN
F 3 "~" H 3500 9850 50  0001 C CNN
	1    3500 9850
	1    0    0    -1  
$EndComp
Wire Wire Line
	1650 10000 1950 10000
Connection ~ 1650 10000
$Comp
L power:PWR_FLAG #FLG02
U 1 1 5F0E9D7D
P 1650 10000
F 0 "#FLG02" H 1650 10075 50  0001 C CNN
F 1 "PWR_FLAG" H 1650 10173 50  0000 C CNN
F 2 "" H 1650 10000 50  0001 C CNN
F 3 "~" H 1650 10000 50  0001 C CNN
	1    1650 10000
	1    0    0    -1  
$EndComp
Wire Wire Line
	1650 9700 1950 9700
Connection ~ 1650 9700
$Comp
L power:PWR_FLAG #FLG01
U 1 1 5F0E8BB3
P 1650 9700
F 0 "#FLG01" H 1650 9775 50  0001 C CNN
F 1 "PWR_FLAG" H 1650 9873 50  0000 C CNN
F 2 "" H 1650 9700 50  0001 C CNN
F 3 "~" H 1650 9700 50  0001 C CNN
	1    1650 9700
	1    0    0    -1  
$EndComp
Connection ~ 1950 9700
Wire Wire Line
	1350 9700 1650 9700
Wire Wire Line
	1350 10000 1650 10000
Wire Wire Line
	2750 10000 3150 10000
Connection ~ 2750 10000
Wire Wire Line
	2350 10000 2750 10000
Connection ~ 2350 10000
Wire Wire Line
	1950 10000 2350 10000
Connection ~ 1950 10000
Wire Wire Line
	1350 10000 1350 10150
Wire Wire Line
	2750 9700 3150 9700
Connection ~ 2750 9700
Wire Wire Line
	2350 9700 2750 9700
Connection ~ 2350 9700
Wire Wire Line
	1950 9700 2350 9700
Wire Wire Line
	1350 9550 1350 9700
$Comp
L Device:C C4
U 1 1 5BFF0898
P 3150 9850
F 0 "C4" H 3265 9896 50  0000 L CNN
F 1 "0.1uF" H 3200 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 3188 9700 50  0001 C CNN
F 3 "~" H 3150 9850 50  0001 C CNN
	1    3150 9850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C3
U 1 1 5BFF0892
P 2750 9850
F 0 "C3" H 2865 9896 50  0000 L CNN
F 1 "0.1uF" H 2800 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 2788 9700 50  0001 C CNN
F 3 "~" H 2750 9850 50  0001 C CNN
	1    2750 9850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C2
U 1 1 5BFE9D13
P 2350 9850
F 0 "C2" H 2465 9896 50  0000 L CNN
F 1 "0.1uF" H 2400 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 2388 9700 50  0001 C CNN
F 3 "~" H 2350 9850 50  0001 C CNN
	1    2350 9850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C1
U 1 1 5BFE9C80
P 1950 9850
F 0 "C1" H 2065 9896 50  0000 L CNN
F 1 "0.1uF" H 2000 9750 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm" H 1988 9700 50  0001 C CNN
F 3 "~" H 1950 9850 50  0001 C CNN
	1    1950 9850
	1    0    0    -1  
$EndComp
Wire Wire Line
	4700 8300 5650 8300
Wire Wire Line
	7150 8300 10400 8300
Wire Wire Line
	7150 8550 7150 8300
Wire Wire Line
	5800 8550 7150 8550
Text Notes 5750 8350 0    50   ~ 0
~S1
Text Notes 5750 8800 0    50   ~ 0
S1
Wire Wire Line
	3450 8300 4100 8300
Connection ~ 3450 8300
Wire Wire Line
	3450 8300 3450 8800
Wire Wire Line
	3450 8800 5650 8800
$Comp
L Jumper:Jumper_3_Open JP?
U 1 1 62069817
P 5650 8550
AR Path="/5D770C6B/62069817" Ref="JP?"  Part="1" 
AR Path="/62069817" Ref="JP1"  Part="1" 
F 0 "JP1" V 5650 8774 50  0000 C CNN
F 1 "Jumper_3_Open" V 6000 8700 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Horizontal" H 5650 8550 50  0001 C CNN
F 3 "~" H 5650 8550 50  0001 C CNN
	1    5650 8550
	0    -1   -1   0   
$EndComp
Connection ~ 4700 9700
Connection ~ 4700 10000
Connection ~ 5100 9700
Connection ~ 5100 10000
Connection ~ 5500 9700
Connection ~ 5500 10000
NoConn ~ 3700 6700
NoConn ~ 3700 6800
NoConn ~ 3700 7100
NoConn ~ 3700 7200
NoConn ~ 3700 7300
NoConn ~ 12000 1850
$Comp
L power:+5V #PWR0102
U 1 1 5F03D9D8
P 3200 6200
F 0 "#PWR0102" H 3200 6050 50  0001 C CNN
F 1 "+5V" H 3215 6373 50  0000 C CNN
F 2 "" H 3200 6200 50  0001 C CNN
F 3 "" H 3200 6200 50  0001 C CNN
	1    3200 6200
	1    0    0    -1  
$EndComp
Wire Wire Line
	3200 6400 3200 6350
Wire Wire Line
	2700 7200 2650 7200
Wire Wire Line
	2650 7200 2650 6350
Wire Wire Line
	2650 6350 3200 6350
Connection ~ 3200 6350
Wire Wire Line
	3200 6350 3200 6200
Wire Wire Line
	1800 8300 3450 8300
$Comp
L Diode:1N4148 D6
U 1 1 5F68D366
P 10300 3500
F 0 "D6" H 10300 2950 50  0000 C CNN
F 1 "1N4148" H 10300 3625 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10300 3325 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10300 3500 50  0001 C CNN
	1    10300 3500
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D7
U 1 1 5F6A06AE
P 10300 3700
F 0 "D7" H 10300 3250 50  0000 C CNN
F 1 "1N4148" H 10300 4460 50  0000 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10300 3525 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10300 3700 50  0001 C CNN
	1    10300 3700
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D3
U 1 1 5F6A06A8
P 10000 3600
F 0 "D3" H 10000 3050 50  0000 C CNN
F 1 "1N4148" H 10000 3725 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10000 3425 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10000 3600 50  0001 C CNN
	1    10000 3600
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D2
U 1 1 5F68D360
P 10000 3400
F 0 "D2" H 10000 2750 50  0000 C CNN
F 1 "1N4148" H 10000 3525 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10000 3225 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10000 3400 50  0001 C CNN
	1    10000 3400
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D1
U 1 1 5F6799F8
P 10000 3200
F 0 "D1" H 10000 2450 50  0000 C CNN
F 1 "1N4148" H 10000 3325 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10000 3025 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10000 3200 50  0001 C CNN
	1    10000 3200
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D5
U 1 1 5F6799FE
P 10300 3300
F 0 "D5" H 10300 2650 50  0000 C CNN
F 1 "1N4148" H 10300 3425 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10300 3125 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10300 3300 50  0001 C CNN
	1    10300 3300
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D8
U 1 1 5F665916
P 10350 3100
F 0 "D8" H 10300 2350 50  0000 C CNN
F 1 "1N4148" H 10350 3225 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10350 2925 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10350 3100 50  0001 C CNN
	1    10350 3100
	1    0    0    -1  
$EndComp
$Comp
L Diode:1N4148 D4
U 1 1 5F662E5C
P 10050 3000
F 0 "D4" H 10000 2150 50  0000 C CNN
F 1 "1N4148" H 10050 3125 50  0001 C CNN
F 2 "Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 10050 2825 50  0001 C CNN
F 3 "https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf" H 10050 3000 50  0001 C CNN
	1    10050 3000
	1    0    0    -1  
$EndComp
Wire Bus Line
	12800 1150 12800 1600
Wire Bus Line
	7500 2450 7500 5800
Wire Bus Line
	13000 5800 13000 7300
Wire Bus Line
	11200 1150 11200 5800
$EndSCHEMATC