EESchema Schematic File Version 4
LIBS:gassensor-cache
EELAYER 26 0
EELAYER END
$Descr USLetter 11000 8500
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L w_connectors:Arduino_Nano_Header J1
U 1 1 5CC9FA3E
P 5600 3250
F 0 "J1" H 5600 4187 60  0000 C CNN
F 1 "Arduino_Nano_Header" H 5600 4081 60  0000 C CNN
F 2 "w_conn_misc:arduino_nano_header" H 5600 3250 60  0001 C CNN
F 3 "" H 5600 3250 60  0000 C CNN
	1    5600 3250
	1    0    0    -1  
$EndComp
$Comp
L device:Speaker LS1
U 1 1 5CC9FB90
P 5050 3250
F 0 "LS1" H 5450 3100 50  0000 C CNN
F 1 "Speaker" H 5450 3200 50  0000 C CNN
F 2 "w_conn_mkds:mkds_1,5-2" H 5050 3050 50  0001 C CNN
F 3 "" H 5040 3200 50  0000 C CNN
	1    5050 3250
	-1   0    0    1   
$EndComp
$Comp
L conn:BARREL_JACK CON1
U 1 1 5CC9FDCB
P 3050 2150
F 0 "CON1" H 3031 2475 50  0000 C CNN
F 1 "BARREL_JACK" H 3031 2384 50  0000 C CNN
F 2 "Connectors:BARREL_JACK" H 3050 2150 50  0001 C CNN
F 3 "" H 3050 2150 50  0000 C CNN
	1    3050 2150
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR0101
U 1 1 5CC9FFA5
P 3350 2050
F 0 "#PWR0101" H 3350 1900 50  0001 C CNN
F 1 "+12V" H 3365 2223 50  0000 C CNN
F 2 "" H 3350 2050 50  0000 C CNN
F 3 "" H 3350 2050 50  0000 C CNN
	1    3350 2050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0102
U 1 1 5CCA003B
P 3350 2250
F 0 "#PWR0102" H 3350 2000 50  0001 C CNN
F 1 "GND" H 3355 2077 50  0000 C CNN
F 2 "" H 3350 2250 50  0000 C CNN
F 3 "" H 3350 2250 50  0000 C CNN
	1    3350 2250
	1    0    0    -1  
$EndComp
Wire Wire Line
	3350 2250 3350 2150
Connection ~ 3350 2250
$Comp
L conn:CONN_01X10 P1
U 1 1 5CCA0146
P 2000 3100
F 0 "P1" H 2077 3141 50  0000 L CNN
F 1 "Switcher" H 2077 3050 50  0000 L CNN
F 2 "pot:SF_STS10" H 2000 3100 50  0001 C CNN
F 3 "" H 2000 3100 50  0000 C CNN
	1    2000 3100
	1    0    0    -1  
$EndComp
Text Label 1500 2650 0    50   ~ 0
VIN+
Wire Wire Line
	1800 3050 1500 3050
Wire Wire Line
	1800 3150 1500 3150
Wire Wire Line
	1800 3250 1500 3250
Wire Wire Line
	1800 3550 1500 3550
Text Label 1500 3050 0    50   ~ 0
VOUT+
Text Label 1500 3150 0    50   ~ 0
TRIM
Text Label 1500 3250 0    50   ~ 0
VOUT-
Text Label 1500 3450 0    50   ~ 0
VIN-
Text Label 1500 3550 0    50   ~ 0
REMOTE
Wire Wire Line
	1200 3450 1200 3650
Wire Wire Line
	1200 3450 1800 3450
$Comp
L power:GND #PWR0103
U 1 1 5CCA09A1
P 1200 3650
F 0 "#PWR0103" H 1200 3400 50  0001 C CNN
F 1 "GND" H 1205 3477 50  0000 C CNN
F 2 "" H 1200 3650 50  0000 C CNN
F 3 "" H 1200 3650 50  0000 C CNN
	1    1200 3650
	1    0    0    -1  
$EndComp
$Comp
L device:R R1
U 1 1 5CCA0A96
P 4400 2950
F 0 "R1" V 4607 2950 50  0000 C CNN
F 1 "1K" V 4516 2950 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 4330 2950 50  0001 C CNN
F 3 "" H 4400 2950 50  0000 C CNN
	1    4400 2950
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4550 2950 5250 2950
Text Label 3950 2950 0    50   ~ 0
REMOTE
Wire Wire Line
	3950 2950 4250 2950
Text Label 2050 4450 0    50   ~ 0
TRIM
$Comp
L device:POT RV1
U 1 1 5CCA14B5
P 1600 4450
F 0 "RV1" H 1530 4496 50  0000 R CNN
F 1 "100K" H 1530 4405 50  0000 R CNN
F 2 "pot:Potentiometer_Vishay_TS53YL_Vertical" H 1600 4450 50  0001 C CNN
F 3 "" H 1600 4450 50  0000 C CNN
	1    1600 4450
	1    0    0    -1  
$EndComp
Wire Wire Line
	1750 4450 2050 4450
Text Label 1600 4100 0    50   ~ 0
VOUT+
Text Label 1600 4800 0    50   ~ 0
VOUT-
Wire Wire Line
	1600 4800 1600 4600
Wire Wire Line
	1600 4300 1600 4100
$Comp
L device:C C1
U 1 1 5CCA1F5B
P 1200 3300
F 0 "C1" H 1315 3346 50  0000 L CNN
F 1 "10uf" H 1315 3255 50  0000 L CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" H 1238 3150 50  0001 C CNN
F 3 "" H 1200 3300 50  0000 C CNN
	1    1200 3300
	1    0    0    -1  
$EndComp
Connection ~ 1200 3450
Wire Wire Line
	1200 3150 1200 2650
Wire Wire Line
	1200 2650 1800 2650
$Comp
L device:C C2
U 1 1 5CCA237B
P 2500 4450
F 0 "C2" H 2615 4496 50  0000 L CNN
F 1 "47uf" H 2615 4405 50  0000 L CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2538 4300 50  0001 C CNN
F 3 "" H 2500 4450 50  0000 C CNN
	1    2500 4450
	1    0    0    -1  
$EndComp
Text Label 2500 4100 0    50   ~ 0
VOUT+
Wire Wire Line
	2500 4600 2500 4800
Wire Wire Line
	2500 4300 2500 4100
Text Label 2500 4800 0    50   ~ 0
VOUT-
$Comp
L device:Fuse F1
U 1 1 5CCA2D4F
P 3650 2050
F 0 "F1" V 3453 2050 50  0000 C CNN
F 1 "Fuse" V 3544 2050 50  0000 C CNN
F 2 "Fuse_Holders_and_Fuses:Fuseholder5x20_horiz_SemiClosed_Casing10x25mm" V 3580 2050 50  0001 C CNN
F 3 "" H 3650 2050 50  0000 C CNN
	1    3650 2050
	0    1    1    0   
$EndComp
Wire Wire Line
	3500 2050 3350 2050
Connection ~ 3350 2050
Wire Wire Line
	3800 2050 3850 2050
$Comp
L power:VCC #PWR0104
U 1 1 5CCA3133
P 4000 2050
F 0 "#PWR0104" H 4000 1900 50  0001 C CNN
F 1 "VCC" H 4017 2223 50  0000 C CNN
F 2 "" H 4000 2050 50  0000 C CNN
F 3 "" H 4000 2050 50  0000 C CNN
	1    4000 2050
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR0105
U 1 1 5CCA32A0
P 1200 2650
F 0 "#PWR0105" H 1200 2500 50  0001 C CNN
F 1 "VCC" H 1217 2823 50  0000 C CNN
F 2 "" H 1200 2650 50  0000 C CNN
F 3 "" H 1200 2650 50  0000 C CNN
	1    1200 2650
	1    0    0    -1  
$EndComp
Connection ~ 1200 2650
$Comp
L power:VCC #PWR0106
U 1 1 5CCA343A
P 6300 2550
F 0 "#PWR0106" H 6300 2400 50  0001 C CNN
F 1 "VCC" H 6317 2723 50  0000 C CNN
F 2 "" H 6300 2550 50  0000 C CNN
F 3 "" H 6300 2550 50  0000 C CNN
	1    6300 2550
	1    0    0    -1  
$EndComp
Wire Wire Line
	6300 2550 5950 2550
Wire Wire Line
	5950 2650 6300 2650
Wire Wire Line
	6300 2650 6300 2700
$Comp
L power:GND #PWR0107
U 1 1 5CCA38BD
P 6300 2700
F 0 "#PWR0107" H 6300 2450 50  0001 C CNN
F 1 "GND" H 6305 2527 50  0000 C CNN
F 2 "" H 6300 2700 50  0000 C CNN
F 3 "" H 6300 2700 50  0000 C CNN
	1    6300 2700
	1    0    0    -1  
$EndComp
Wire Wire Line
	5250 2850 4850 2850
Wire Wire Line
	4850 2850 4850 2700
Wire Wire Line
	4850 2700 4650 2700
$Comp
L power:GND #PWR0108
U 1 1 5CCA3C35
P 4650 2700
F 0 "#PWR0108" H 4650 2450 50  0001 C CNN
F 1 "GND" H 4655 2527 50  0000 C CNN
F 2 "" H 4650 2700 50  0000 C CNN
F 3 "" H 4650 2700 50  0000 C CNN
	1    4650 2700
	1    0    0    -1  
$EndComp
$Comp
L device:D D1
U 1 1 5CCA3E2A
P 3850 2200
F 0 "D1" V 3804 2279 50  0000 L CNN
F 1 "ReverseVoltageDiode" V 3895 2279 50  0000 L CNN
F 2 "Diodes_THT:Diode_DO-41_SOD81_Horizontal_RM10" H 3850 2200 50  0001 C CNN
F 3 "" H 3850 2200 50  0000 C CNN
	1    3850 2200
	0    1    1    0   
$EndComp
Connection ~ 3850 2050
Wire Wire Line
	3850 2050 4000 2050
Wire Wire Line
	3850 2350 3500 2350
Wire Wire Line
	3500 2350 3500 2250
Wire Wire Line
	3500 2250 3350 2250
Text Label 5950 2950 0    50   ~ 0
A7
Text Label 5950 3050 0    50   ~ 0
A6
Text Label 5950 3150 0    50   ~ 0
A5
Text Label 5950 3250 0    50   ~ 0
A4
Text Label 5950 3350 0    50   ~ 0
A3
Text Label 5950 3450 0    50   ~ 0
A2
Text Label 5950 3550 0    50   ~ 0
A1
Text Label 5950 3650 0    50   ~ 0
A0
Text Label 5250 3550 2    50   ~ 0
D8
Text Label 5250 3650 2    50   ~ 0
D9
$Comp
L device:LED D3
U 1 1 5CCA4C40
P 7900 3050
F 0 "D3" H 8200 3050 50  0000 C CNN
F 1 "LED" H 8450 3050 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3050 50  0001 C CNN
F 3 "" H 7900 3050 50  0000 C CNN
	1    7900 3050
	-1   0    0    1   
$EndComp
$Comp
L device:R R3
U 1 1 5CCA4CD4
P 8200 3050
F 0 "R3" V 8200 3400 50  0000 C CNN
F 1 "1K" V 8200 3050 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3050 50  0001 C CNN
F 3 "" H 8200 3050 50  0000 C CNN
	1    8200 3050
	0    1    1    0   
$EndComp
$Comp
L device:D D4
U 1 1 5CCA4E2B
P 7900 3200
F 0 "D4" H 8200 3200 50  0000 C CNN
F 1 "D" H 8400 3200 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3200 50  0001 C CNN
F 3 "" H 7900 3200 50  0000 C CNN
	1    7900 3200
	-1   0    0    1   
$EndComp
$Comp
L device:R R4
U 1 1 5CCA4EC1
P 8200 3200
F 0 "R4" V 8200 3550 50  0000 C CNN
F 1 "1K" V 8200 3200 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3200 50  0001 C CNN
F 3 "" H 8200 3200 50  0000 C CNN
	1    8200 3200
	0    1    1    0   
$EndComp
$Comp
L device:LED D5
U 1 1 5CCA572B
P 7900 3350
F 0 "D5" H 8200 3350 50  0000 C CNN
F 1 "LED" H 8450 3350 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3350 50  0001 C CNN
F 3 "" H 7900 3350 50  0000 C CNN
	1    7900 3350
	-1   0    0    1   
$EndComp
$Comp
L device:R R5
U 1 1 5CCA5731
P 8200 3350
F 0 "R5" V 8200 3700 50  0000 C CNN
F 1 "1K" V 8200 3350 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3350 50  0001 C CNN
F 3 "" H 8200 3350 50  0000 C CNN
	1    8200 3350
	0    1    1    0   
$EndComp
$Comp
L device:D D6
U 1 1 5CCA5737
P 7900 3500
F 0 "D6" H 8200 3500 50  0000 C CNN
F 1 "D" H 8400 3500 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3500 50  0001 C CNN
F 3 "" H 7900 3500 50  0000 C CNN
	1    7900 3500
	-1   0    0    1   
$EndComp
$Comp
L device:R R6
U 1 1 5CCA573D
P 8200 3500
F 0 "R6" V 8200 3850 50  0000 C CNN
F 1 "1K" V 8200 3500 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3500 50  0001 C CNN
F 3 "" H 8200 3500 50  0000 C CNN
	1    8200 3500
	0    1    1    0   
$EndComp
$Comp
L device:LED D7
U 1 1 5CCA5BE1
P 7900 3650
F 0 "D7" H 8200 3650 50  0000 C CNN
F 1 "LED" H 8450 3650 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3650 50  0001 C CNN
F 3 "" H 7900 3650 50  0000 C CNN
	1    7900 3650
	-1   0    0    1   
$EndComp
$Comp
L device:R R7
U 1 1 5CCA5BE7
P 8200 3650
F 0 "R7" V 8200 4000 50  0000 C CNN
F 1 "1K" V 8200 3650 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3650 50  0001 C CNN
F 3 "" H 8200 3650 50  0000 C CNN
	1    8200 3650
	0    1    1    0   
$EndComp
$Comp
L device:D D8
U 1 1 5CCA5BED
P 7900 3800
F 0 "D8" H 8200 3800 50  0000 C CNN
F 1 "D" H 8400 3800 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3800 50  0001 C CNN
F 3 "" H 7900 3800 50  0000 C CNN
	1    7900 3800
	-1   0    0    1   
$EndComp
$Comp
L device:R R8
U 1 1 5CCA5BF3
P 8200 3800
F 0 "R8" V 8200 4150 50  0000 C CNN
F 1 "1K" V 8200 3800 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3800 50  0001 C CNN
F 3 "" H 8200 3800 50  0000 C CNN
	1    8200 3800
	0    1    1    0   
$EndComp
$Comp
L device:LED D9
U 1 1 5CCA5BF9
P 7900 3950
F 0 "D9" H 8200 3950 50  0000 C CNN
F 1 "LED" H 8450 3950 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 3950 50  0001 C CNN
F 3 "" H 7900 3950 50  0000 C CNN
	1    7900 3950
	-1   0    0    1   
$EndComp
$Comp
L device:R R9
U 1 1 5CCA5BFF
P 8200 3950
F 0 "R9" V 8200 4300 50  0000 C CNN
F 1 "1K" V 8200 3950 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 3950 50  0001 C CNN
F 3 "" H 8200 3950 50  0000 C CNN
	1    8200 3950
	0    1    1    0   
$EndComp
$Comp
L device:D D10
U 1 1 5CCA5C05
P 7900 4100
F 0 "D10" H 8200 4100 50  0000 C CNN
F 1 "D" H 8400 4100 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7900 4100 50  0001 C CNN
F 3 "" H 7900 4100 50  0000 C CNN
	1    7900 4100
	-1   0    0    1   
$EndComp
$Comp
L device:R R10
U 1 1 5CCA5C0B
P 8200 4100
F 0 "R10" V 8200 4450 50  0000 C CNN
F 1 "1K" V 8200 4100 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 8130 4100 50  0001 C CNN
F 3 "" H 8200 4100 50  0000 C CNN
	1    8200 4100
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR0109
U 1 1 5CCA6999
P 8350 4550
F 0 "#PWR0109" H 8350 4300 50  0001 C CNN
F 1 "GND" H 8355 4377 50  0000 C CNN
F 2 "" H 8350 4550 50  0000 C CNN
F 3 "" H 8350 4550 50  0000 C CNN
	1    8350 4550
	1    0    0    -1  
$EndComp
Connection ~ 8350 3200
Wire Wire Line
	8350 3200 8350 3050
Connection ~ 8350 3350
Wire Wire Line
	8350 3350 8350 3200
Connection ~ 8350 3500
Wire Wire Line
	8350 3500 8350 3350
Connection ~ 8350 3650
Wire Wire Line
	8350 3650 8350 3500
Connection ~ 8350 3800
Wire Wire Line
	8350 3800 8350 3650
Connection ~ 8350 3950
Wire Wire Line
	8350 3950 8350 3800
Connection ~ 8350 4100
Wire Wire Line
	8350 4100 8350 3950
Text Label 7750 3050 2    50   ~ 0
A0
Text Label 7750 3200 2    50   ~ 0
A1
Text Label 7750 3350 2    50   ~ 0
A2
Text Label 7750 3500 2    50   ~ 0
A3
Text Label 7750 3800 2    50   ~ 0
A5
Text Label 7750 3650 2    50   ~ 0
A4
$Comp
L device:LED D2
U 1 1 5CCA7FCB
P 7550 2150
F 0 "D2" H 7650 2000 50  0000 C CNN
F 1 "PWRLED" H 7750 2250 50  0000 C CNN
F 2 "LEDs:LED-3MM" H 7550 2150 50  0001 C CNN
F 3 "" H 7550 2150 50  0000 C CNN
	1    7550 2150
	-1   0    0    1   
$EndComp
$Comp
L device:R R2
U 1 1 5CCA7FD1
P 7850 2150
F 0 "R2" V 7850 2500 50  0000 C CNN
F 1 "2K" V 7850 2150 50  0000 C CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 7780 2150 50  0001 C CNN
F 3 "" H 7850 2150 50  0000 C CNN
	1    7850 2150
	0    1    1    0   
$EndComp
Wire Wire Line
	8000 2300 8000 2150
$Comp
L power:GND #PWR0110
U 1 1 5CCA8BC6
P 8000 2300
F 0 "#PWR0110" H 8000 2050 50  0001 C CNN
F 1 "GND" H 8005 2127 50  0000 C CNN
F 2 "" H 8000 2300 50  0000 C CNN
F 3 "" H 8000 2300 50  0000 C CNN
	1    8000 2300
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR0111
U 1 1 5CCA8C95
P 7250 2150
F 0 "#PWR0111" H 7250 2000 50  0001 C CNN
F 1 "VCC" H 7267 2323 50  0000 C CNN
F 2 "" H 7250 2150 50  0000 C CNN
F 3 "" H 7250 2150 50  0000 C CNN
	1    7250 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	7400 2150 7250 2150
Wire Wire Line
	3850 4800 4000 4800
Text Label 4250 4800 0    50   ~ 0
VSenseOut
Wire Wire Line
	5950 2850 6600 2850
$Comp
L power:+5V #PWR0114
U 1 1 5CCAE6E7
P 6600 2850
F 0 "#PWR0114" H 6600 2700 50  0001 C CNN
F 1 "+5V" H 6615 3023 50  0000 C CNN
F 2 "" H 6600 2850 50  0000 C CNN
F 3 "" H 6600 2850 50  0000 C CNN
	1    6600 2850
	1    0    0    -1  
$EndComp
$Comp
L conn:CONN_01X01 P4
U 1 1 5CCAE976
P 6150 3750
F 0 "P4" H 6227 3791 50  0000 L CNN
F 1 "Arefbrk" H 6227 3700 50  0000 L CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x01" H 6150 3750 50  0001 C CNN
F 3 "" H 6150 3750 50  0000 C CNN
	1    6150 3750
	1    0    0    -1  
$EndComp
$Comp
L conn:CONN_01X01 P3
U 1 1 5CCAED2A
P 5050 2750
F 0 "P3" H 4969 2525 50  0000 C CNN
F 1 "RST_brkout" H 4969 2616 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x01" H 5050 2750 50  0001 C CNN
F 3 "" H 5050 2750 50  0000 C CNN
	1    5050 2750
	-1   0    0    1   
$EndComp
$Comp
L conn:CONN_01X04 P8
U 1 1 5CCB5B84
P 3650 3500
F 0 "P8" H 3727 3541 50  0000 L CNN
F 1 "SPI_Brkout" H 3727 3450 50  0000 L CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x04" H 3650 3500 50  0001 C CNN
F 3 "" H 3650 3500 50  0000 C CNN
	1    3650 3500
	1    0    0    -1  
$EndComp
Text Label 5250 3750 2    50   ~ 0
SS
Text Label 5250 3850 2    50   ~ 0
MOSI
Text Label 5250 3950 2    50   ~ 0
MISO
Text Label 5950 3950 0    50   ~ 0
SCK
Text Label 3450 3350 2    50   ~ 0
SS
Text Label 3450 3450 2    50   ~ 0
MOSI
Text Label 3450 3550 2    50   ~ 0
MISO
Text Label 3450 3650 2    50   ~ 0
SCK
Text Label 5250 2550 2    50   ~ 0
TX
Text Label 5250 2650 2    50   ~ 0
RX
$Comp
L conn:CONN_01X02 P7
U 1 1 5CCB6AC0
P 3250 2800
F 0 "P7" H 3328 2841 50  0000 L CNN
F 1 "UART" H 3328 2750 50  0000 L CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x02" H 3250 2800 50  0001 C CNN
F 3 "" H 3250 2800 50  0000 C CNN
	1    3250 2800
	1    0    0    -1  
$EndComp
Text Label 3050 2750 2    50   ~ 0
TX
Text Label 3050 2850 2    50   ~ 0
RX
Text Label 5250 3050 2    50   ~ 0
D3
Text Label 5250 3350 2    50   ~ 0
D6
Text Label 5250 3450 2    50   ~ 0
D7
$Comp
L conn:CONN_01X03 P6
U 1 1 5CCB798F
P 2700 3600
F 0 "P6" H 2778 3641 50  0000 L CNN
F 1 "MISC_Brkout" H 2650 3400 50  0000 L CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x03" H 2700 3600 50  0001 C CNN
F 3 "" H 2700 3600 50  0000 C CNN
	1    2700 3600
	1    0    0    -1  
$EndComp
Text Label 2500 3500 2    50   ~ 0
D3
Text Label 2500 3600 2    50   ~ 0
D6
Text Label 2500 3700 2    50   ~ 0
D7
$Comp
L device:R R13
U 1 1 5CCBB5E7
P 4000 4950
F 0 "R13" H 4070 4996 50  0000 L CNN
F 1 "200K" H 4070 4905 50  0000 L CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" V 3930 4950 50  0001 C CNN
F 3 "" H 4000 4950 50  0000 C CNN
	1    4000 4950
	1    0    0    -1  
$EndComp
Connection ~ 4000 4800
Wire Wire Line
	4000 4800 4250 4800
$Comp
L device:POT RV2
U 1 1 5CCBB715
P 4000 5250
F 0 "RV2" H 3930 5296 50  0000 R CNN
F 1 "1M" H 3930 5205 50  0000 R CNN
F 2 "pot:Potentiometer_Vishay_TS53YL_Vertical" H 4000 5250 50  0001 C CNN
F 3 "" H 4000 5250 50  0000 C CNN
	1    4000 5250
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0117
U 1 1 5CCBB813
P 4150 5250
F 0 "#PWR0117" H 4150 5000 50  0001 C CNN
F 1 "GND" H 4155 5077 50  0000 C CNN
F 2 "" H 4150 5250 50  0000 C CNN
F 3 "" H 4150 5250 50  0000 C CNN
	1    4150 5250
	1    0    0    -1  
$EndComp
$Comp
L conn:CONN_01X04 P9
U 1 1 5CCBE214
P 5550 5850
F 0 "P9" H 5628 5891 50  0000 L CNN
F 1 "GasSensorEdgeConnector" H 5628 5800 50  0000 L CNN
F 2 "pot:EdgeConnectorGasSensorPCB_v2" H 5550 5850 50  0001 C CNN
F 3 "" H 5550 5850 50  0000 C CNN
	1    5550 5850
	1    0    0    -1  
$EndComp
Wire Wire Line
	5350 5900 5000 5900
$Comp
L power:GND #PWR0118
U 1 1 5CCBE21B
P 5000 5900
F 0 "#PWR0118" H 5000 5650 50  0001 C CNN
F 1 "GND" H 5005 5727 50  0000 C CNN
F 2 "" H 5000 5900 50  0000 C CNN
F 3 "" H 5000 5900 50  0000 C CNN
	1    5000 5900
	1    0    0    -1  
$EndComp
Wire Wire Line
	5350 5700 5000 5700
Text Label 5000 5700 0    50   ~ 0
VOUT+
Wire Wire Line
	5350 6000 5350 6250
Wire Wire Line
	5350 6250 5750 6250
Text Label 5750 6250 0    50   ~ 0
VSenseOut
Text Label 5000 5800 0    50   ~ 0
VccSense
Wire Wire Line
	4800 5800 5350 5800
$Comp
L power:+5V #PWR0119
U 1 1 5CCBE228
P 4800 5800
F 0 "#PWR0119" H 4800 5650 50  0001 C CNN
F 1 "+5V" H 4815 5973 50  0000 C CNN
F 2 "" H 4800 5800 50  0000 C CNN
F 3 "" H 4800 5800 50  0000 C CNN
	1    4800 5800
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR0113
U 1 1 5CCADAEA
P 3300 4350
F 0 "#PWR0113" H 3300 4200 50  0001 C CNN
F 1 "+5V" H 3315 4523 50  0000 C CNN
F 2 "" H 3300 4350 50  0000 C CNN
F 3 "" H 3300 4350 50  0000 C CNN
	1    3300 4350
	1    0    0    -1  
$EndComp
Wire Wire Line
	3300 4350 3850 4350
Text Label 3500 4350 0    50   ~ 0
VccSense
Wire Wire Line
	3850 4550 3850 4800
Text Label 3500 4250 0    50   ~ 0
VOUT+
Wire Wire Line
	3850 4250 3500 4250
$Comp
L power:GND #PWR0112
U 1 1 5CCAA94B
P 3500 4450
F 0 "#PWR0112" H 3500 4200 50  0001 C CNN
F 1 "GND" H 3505 4277 50  0000 C CNN
F 2 "" H 3500 4450 50  0000 C CNN
F 3 "" H 3500 4450 50  0000 C CNN
	1    3500 4450
	1    0    0    -1  
$EndComp
Wire Wire Line
	3850 4450 3500 4450
$Comp
L conn:CONN_01X04 P2
U 1 1 5CCA9BE8
P 4050 4400
F 0 "P2" H 4127 4441 50  0000 L CNN
F 1 "GasSensor" H 4127 4350 50  0000 L CNN
F 2 "w_conn_mkds:mkds_1,5-4" H 4050 4400 50  0001 C CNN
F 3 "" H 4050 4400 50  0000 C CNN
	1    4050 4400
	1    0    0    -1  
$EndComp
Wire Wire Line
	8350 4100 8350 4550
$Comp
L mechanical:Mounting_Hole MK4
U 1 1 5CCC47B4
P 7050 5500
F 0 "MK4" H 7150 5546 50  0000 L CNN
F 1 "Mounting_Hole" H 7150 5455 50  0000 L CNN
F 2 "Mounting_Holes:MountingHole_5.3mm_M5" H 7050 5500 60  0001 C CNN
F 3 "" H 7050 5500 60  0001 C CNN
	1    7050 5500
	1    0    0    -1  
$EndComp
$Comp
L mechanical:Mounting_Hole MK3
U 1 1 5CCC48EE
P 7050 5250
F 0 "MK3" H 7150 5296 50  0000 L CNN
F 1 "Mounting_Hole" H 7150 5205 50  0000 L CNN
F 2 "Mounting_Holes:MountingHole_5.3mm_M5" H 7050 5250 60  0001 C CNN
F 3 "" H 7050 5250 60  0001 C CNN
	1    7050 5250
	1    0    0    -1  
$EndComp
$Comp
L mechanical:Mounting_Hole MK2
U 1 1 5CCC4A58
P 7050 5000
F 0 "MK2" H 7150 5046 50  0000 L CNN
F 1 "Mounting_Hole" H 7150 4955 50  0000 L CNN
F 2 "Mounting_Holes:MountingHole_5.3mm_M5" H 7050 5000 60  0001 C CNN
F 3 "" H 7050 5000 60  0001 C CNN
	1    7050 5000
	1    0    0    -1  
$EndComp
$Comp
L mechanical:Mounting_Hole MK1
U 1 1 5CCC4B04
P 7050 4750
F 0 "MK1" H 7150 4796 50  0000 L CNN
F 1 "Mounting_Hole" H 7150 4705 50  0000 L CNN
F 2 "Mounting_Holes:MountingHole_5.3mm_M5" H 7050 4750 60  0001 C CNN
F 3 "" H 7050 4750 60  0001 C CNN
	1    7050 4750
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0115
U 1 1 5CCC61F2
P 1600 4800
F 0 "#PWR0115" H 1600 4550 50  0001 C CNN
F 1 "GND" H 1605 4627 50  0000 C CNN
F 2 "" H 1600 4800 50  0000 C CNN
F 3 "" H 1600 4800 50  0000 C CNN
	1    1600 4800
	1    0    0    -1  
$EndComp
Text Notes 4000 1150 0    157  ~ 31
Flammable Gas Sensor
Wire Wire Line
	5950 3050 6200 3050
Text Label 6200 3050 0    50   ~ 0
VSenseOut
Text Label 7750 3950 2    50   ~ 0
D7
Text Label 7750 4100 2    50   ~ 0
D8
Text Notes 2400 5900 0    50   ~ 0
It's generally\nrecommended to use\na small potentiometer\nwith a large static R resistor.\nOr use no pot at all.\n(and instead use an\naccurate resistor, say .1%)\nAfter a good known\nvalue of resistance is found,\nthis should be changed.
$EndSCHEMATC