MTH.sch

EESchema Schematic File Version 4
LIBS:AudiA6Main-cache
EELAYER 26 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 5
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L power:GND #PWR037
U 1 1 5AB93D5D
P 5500 5275
F 0 "#PWR037" H 5500 5025 50  0001 C CNN
F 1 "GND" H 5505 5102 50  0000 C CNN
F 2 "" H 5500 5275 50  0001 C CNN
F 3 "" H 5500 5275 50  0001 C CNN
	1    5500 5275
	1    0    0    -1  
$EndComp
Wire Wire Line
	4750 5050 4750 5100
Wire Wire Line
	4750 5100 4975 5100
Wire Wire Line
	5500 5100 5500 5275
Wire Wire Line
	6100 5100 6100 4150
Connection ~ 5500 5100
Wire Wire Line
	5675 5050 5675 5100
Connection ~ 5675 5100
Wire Wire Line
	5175 4775 5175 5100
Connection ~ 5175 5100
Wire Wire Line
	4975 4500 4975 5100
Connection ~ 4975 5100
Wire Wire Line
	5400 4175 5400 5100
Connection ~ 5400 5100
Wire Wire Line
	5900 4750 5900 5100
Connection ~ 5900 5100
$Comp
L Connector:Conn_02x07_Counter_Clockwise J10
U 1 1 5AB94148
P 5550 2775
F 0 "J10" V 5554 3155 50  0000 L CNN
F 1 "Conn_02x07_Counter_Clockwise" V 5645 3155 50  0000 L CNN
F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 5550 2775 50  0001 C CNN
F 3 "~" H 5550 2775 50  0001 C CNN
	1    5550 2775
	0    1    1    0   
$EndComp
Wire Wire Line
	4750 4650 4750 2400
Wire Wire Line
	4750 2400 5200 2400
Wire Wire Line
	5250 2400 5250 2575
$Comp
L Device:R_Small R13
U 1 1 5AB9432F
P 4975 3525
F 0 "R13" H 5034 3571 50  0000 L CNN
F 1 "10k" H 5034 3480 50  0000 L CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 4975 3525 50  0001 C CNN
F 3 "" H 4975 3525 50  0001 C CNN
	1    4975 3525
	1    0    0    -1  
$EndComp
Wire Wire Line
	4975 3625 4975 4100
Wire Wire Line
	4975 2500 4975 3225
Wire Wire Line
	4975 2500 5350 2500
Wire Wire Line
	5350 2500 5350 2575
Wire Wire Line
	5175 4375 5175 3625
Wire Wire Line
	5175 3625 5250 3625
Wire Wire Line
	5250 3625 5250 3075
Wire Wire Line
	5675 4650 5675 3400
Wire Wire Line
	5675 3400 5350 3400
Wire Wire Line
	5350 3400 5350 3075
Wire Wire Line
	6100 3750 6100 3325
Wire Wire Line
	6100 3325 5450 3325
Wire Wire Line
	5450 3325 5450 3075
Wire Wire Line
	5400 3775 5400 3600
Wire Wire Line
	5400 3600 6225 3600
Wire Wire Line
	6225 3600 6225 2400
Wire Wire Line
	6225 2400 5650 2400
Wire Wire Line
	5650 2400 5650 2575
Wire Wire Line
	5900 4350 5900 3650
Wire Wire Line
	5900 3650 6150 3650
Wire Wire Line
	6150 3650 6150 2450
Wire Wire Line
	6150 2450 5750 2450
Wire Wire Line
	5750 2450 5750 2575
NoConn ~ 5850 2575
NoConn ~ 5750 3075
NoConn ~ 5850 3075
NoConn ~ 5450 2575
Wire Wire Line
	5550 2575 5550 2175
$Comp
L Device:R_Small R15
U 1 1 5AB9B492
P 5375 2175
F 0 "R15" V 5179 2175 50  0000 C CNN
F 1 "10k" V 5270 2175 50  0000 C CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 5375 2175 50  0001 C CNN
F 3 "" H 5375 2175 50  0001 C CNN
	1    5375 2175
	0    1    1    0   
$EndComp
Wire Wire Line
	5475 2175 5550 2175
Wire Wire Line
	4400 2175 5200 2175
$Comp
L Device:R_Small R12
U 1 1 5AB9F1C8
P 4625 3225
F 0 "R12" V 4429 3225 50  0000 C CNN
F 1 "2.2k" V 4520 3225 50  0000 C CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 4625 3225 50  0001 C CNN
F 3 "" H 4625 3225 50  0001 C CNN
	1    4625 3225
	0    1    1    0   
$EndComp
Wire Wire Line
	4975 3225 4725 3225
Connection ~ 4975 3225
$Comp
L Device:R_Small R14
U 1 1 5ABA0326
P 5200 1750
F 0 "R14" V 5004 1750 50  0000 C CNN
F 1 "200k" V 5095 1750 50  0000 C CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 5200 1750 50  0001 C CNN
F 3 "" H 5200 1750 50  0001 C CNN
	1    5200 1750
	1    0    0    -1  
$EndComp
Wire Wire Line
	4525 3225 4400 3225
Wire Wire Line
	4400 3225 4400 2175
$Comp
L Device:C_Small C20
U 1 1 5ABB746D
P 6625 1975
F 0 "C20" H 6533 1929 50  0000 R CNN
F 1 "C_Small" H 6533 2020 50  0000 R CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" H 6625 1975 50  0001 C CNN
F 3 "" H 6625 1975 50  0001 C CNN
	1    6625 1975
	0    -1   -1   0   
$EndComp
Wire Wire Line
	6775 1975 6775 2225
Wire Wire Line
	6775 1975 6725 1975
$Comp
L Device:D_Small D1
U 1 1 5ABB984C
P 6625 2425
F 0 "D1" V 6671 2357 50  0000 R CNN
F 1 "D_Small" V 6580 2357 50  0000 R CNN
F 2 "Diodes_SMD:D_0805" V 6625 2425 50  0001 C CNN
F 3 "" V 6625 2425 50  0001 C CNN
	1    6625 2425
	1    0    0    -1  
$EndComp
Wire Wire Line
	6725 2425 6775 2425
Wire Wire Line
	6525 2425 6475 2425
Wire Wire Line
	6475 1975 6475 2175
Wire Wire Line
	6475 1975 6525 1975
Connection ~ 5550 2175
Connection ~ 6475 2175
Wire Wire Line
	5200 1650 5200 1525
$Comp
L Device:R_Small R16
U 1 1 5ABC7633
P 6100 2000
F 0 "R16" H 6041 1954 50  0000 R CNN
F 1 "680" H 6041 2045 50  0000 R CNN
F 2 "Resistors_SMD:R_0805_HandSoldering" H 6100 2000 50  0001 C CNN
F 3 "" H 6100 2000 50  0001 C CNN
	1    6100 2000
	-1   0    0    1   
$EndComp
Wire Wire Line
	6100 2100 6100 2175
Connection ~ 6100 2175
$Comp
L power:GND #PWR040
U 1 1 5ABCD1A8
P 6950 2525
F 0 "#PWR040" H 6950 2275 50  0001 C CNN
F 1 "GND" H 6955 2352 50  0000 C CNN
F 2 "" H 6950 2525 50  0001 C CNN
F 3 "" H 6950 2525 50  0001 C CNN
	1    6950 2525
	1    0    0    -1  
$EndComp
Wire Wire Line
	6950 2525 6950 2225
Wire Wire Line
	6950 2225 6775 2225
Connection ~ 6775 2225
$Comp
L power:+12V #PWR039
U 1 1 5ABD026F
P 6100 1175
F 0 "#PWR039" H 6100 1025 50  0001 C CNN
F 1 "+12V" H 6115 1348 50  0000 C CNN
F 2 "" H 6100 1175 50  0001 C CNN
F 3 "" H 6100 1175 50  0001 C CNN
	1    6100 1175
	1    0    0    -1  
$EndComp
Wire Wire Line
	6100 1625 6100 1900
Wire Wire Line
	6100 1175 6100 1225
Wire Wire Line
	5200 1850 5200 2175
Connection ~ 5200 2400
Connection ~ 5200 2175
Wire Wire Line
	5800 1425 5750 1425
$Comp
L Transistor:BSS138 Q1
U 1 1 5ABF00F5
P 4650 4850
F 0 "Q1" H 4855 4896 50  0000 L CNN
F 1 "BSS138" H 4855 4805 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 4850 4775 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 4650 4850 50  0001 L CNN
	1    4650 4850
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q2
U 1 1 5ABF0324
P 4875 4300
F 0 "Q2" H 5080 4346 50  0000 L CNN
F 1 "BSS138" H 5080 4255 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 5075 4225 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 4875 4300 50  0001 L CNN
	1    4875 4300
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q3
U 1 1 5ABF035A
P 5075 4575
F 0 "Q3" H 5280 4621 50  0000 L CNN
F 1 "BSS138" H 5280 4530 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 5275 4500 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 5075 4575 50  0001 L CNN
	1    5075 4575
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q4
U 1 1 5ABF03A4
P 5300 3975
F 0 "Q4" H 5505 4021 50  0000 L CNN
F 1 "BSS138" H 5505 3930 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 5500 3900 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 5300 3975 50  0001 L CNN
	1    5300 3975
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q5
U 1 1 5ABF03E0
P 5575 4850
F 0 "Q5" H 5780 4896 50  0000 L CNN
F 1 "BSS138" H 5780 4805 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 5775 4775 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 5575 4850 50  0001 L CNN
	1    5575 4850
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q6
U 1 1 5ABF043A
P 5800 4550
F 0 "Q6" H 6005 4596 50  0000 L CNN
F 1 "BSS138" H 6005 4505 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 6000 4475 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 5800 4550 50  0001 L CNN
	1    5800 4550
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q8
U 1 1 5ABF047E
P 6000 3950
F 0 "Q8" H 6205 3996 50  0000 L CNN
F 1 "BSS138" H 6205 3905 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 6200 3875 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 6000 3950 50  0001 L CNN
	1    6000 3950
	1    0    0    -1  
$EndComp
$Comp
L Transistor:BSS138 Q7
U 1 1 5ABF04CA
P 6000 1425
F 0 "Q7" H 6205 1471 50  0000 L CNN
F 1 "BSS138" H 6205 1380 50  0000 L CNN
F 2 "TO_SOT_Packages_SMD:SOT-23" H 6200 1350 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/BS/BSS138.pdf" H 6000 1425 50  0001 L CNN
	1    6000 1425
	1    0    0    -1  
$EndComp
Wire Wire Line
	4450 4850 4125 4850
Wire Wire Line
	4125 4300 4675 4300
Wire Wire Line
	4875 4575 4125 4575
Wire Wire Line
	4150 3975 5100 3975
Wire Wire Line
	5375 4850 5325 4850
Wire Wire Line
	5325 4850 5325 5175
Wire Wire Line
	5325 5175 4125 5175
Wire Wire Line
	5600 4550 5550 4550
Wire Wire Line
	5550 4125 5550 4550
Wire Wire Line
	5550 4125 4150 4125
Wire Wire Line
	5800 3950 5750 3950
Wire Wire Line
	5750 3950 5750 3775
Wire Wire Line
	5750 3775 4150 3775
NoConn ~ 5650 3075
$Comp
L power:GND #PWR038
U 1 1 5AC1D84A
P 5550 3100
F 0 "#PWR038" H 5550 2850 50  0001 C CNN
F 1 "GND" H 5555 2927 50  0000 C CNN
F 2 "" H 5550 3100 50  0001 C CNN
F 3 "" H 5550 3100 50  0001 C CNN
	1    5550 3100
	1    0    0    -1  
$EndComp
Wire Wire Line
	5550 3100 5550 3075
Wire Wire Line
	5500 5100 5675 5100
Wire Wire Line
	5675 5100 5900 5100
Wire Wire Line
	5175 5100 5400 5100
Wire Wire Line
	4975 5100 5175 5100
Wire Wire Line
	5400 5100 5500 5100
Wire Wire Line
	5900 5100 6100 5100
Wire Wire Line
	4975 3225 4975 3425
Wire Wire Line
	5550 2175 6100 2175
Wire Wire Line
	6475 2175 6475 2425
Wire Wire Line
	6100 2175 6475 2175
Wire Wire Line
	6775 2225 6775 2425
Wire Wire Line
	5200 2400 5250 2400
Wire Wire Line
	5200 2175 5275 2175
Wire Wire Line
	5200 2175 5200 2400
Text HLabel 4125 4850 0    50   Input ~ 0
BTN1
Text HLabel 4125 4300 0    50   Input ~ 0
BTN2
Text HLabel 4125 4575 0    50   Input ~ 0
BTN3
Text HLabel 4125 5175 0    50   Input ~ 0
BTN5
Text HLabel 4150 4125 0    50   Input ~ 0
BTN6
Text HLabel 4150 3975 0    50   Input ~ 0
BTN4
Text HLabel 4150 3775 0    50   Input ~ 0
BTN7
Text HLabel 5750 1425 0    50   Input ~ 0
MTH_EN
Text HLabel 5200 1525 0    50   Input ~ 0
MTH_OUT
$EndSCHEMATC