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Electronics_Projects_2019/FlammableGasSensor/pcb/archive/rev1.1/gassensor.sch

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EESchema Schematic File Version 4
LIBS:gassensor-cache
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EELAYER END
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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