EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:switches
LIBS:relays
LIBS:motors
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:microcontrollers
LIBS:dsp
LIBS:microchip
LIBS:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:interface
LIBS:digital-audio
LIBS:philips
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:lts
LIBS:lts-proto-cache
EELAYER 25 0
EELAYER END
$Descr USLetter 11000 8500
encoding utf-8
Sheet 3 3
Title "Sensors"
Date "2018-02-06"
Rev "AA"
Comp "Let's Talk Science"
Comment1 "Shawn Nock <shawn@monadnock.ca>"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Si7006-A20 U303
U 1 1 5A7DCB07
P 6350 4750
F 0 "U303" H 6500 4500 39  0000 C CNN
F 1 "Si7006-A20" V 6200 4650 39  0000 C CNN
F 2 "" H 6350 4750 39  0001 C CNN
F 3 "" H 6350 4750 39  0001 C CNN
	1    6350 4750
	1    0    0    -1  
$EndComp
Wire Wire Line
	6650 4700 6800 4700
Wire Wire Line
	6650 4850 6800 4850
$Comp
L GND #PWR035
U 1 1 5A7DCB08
P 6300 5250
F 0 "#PWR035" H 6300 5000 50  0001 C CNN
F 1 "GND" H 6300 5100 50  0000 C CNN
F 2 "" H 6300 5250 50  0001 C CNN
F 3 "" H 6300 5250 50  0001 C CNN
	1    6300 5250
	1    0    0    -1  
$EndComp
$Comp
L +3.3V #PWR036
U 1 1 5A7DCB09
P 6300 4300
F 0 "#PWR036" H 6300 4150 50  0001 C CNN
F 1 "+3.3V" H 6300 4440 50  0000 C CNN
F 2 "" H 6300 4300 50  0001 C CNN
F 3 "" H 6300 4300 50  0001 C CNN
	1    6300 4300
	1    0    0    -1  
$EndComp
Wire Wire Line
	6300 4300 6300 4450
$Comp
L C C302
U 1 1 5A7DCB0C
P 5850 4750
F 0 "C302" H 5875 4850 50  0000 L CNN
F 1 "0.1uF" H 5875 4650 50  0000 L CNN
F 2 "" H 5888 4600 50  0001 C CNN
F 3 "" H 5850 4750 50  0001 C CNN
	1    5850 4750
	1    0    0    -1  
$EndComp
Text Notes 5700 4050 0    60   ~ 0
Temperature and Humidity
NoConn ~ 4650 4500
NoConn ~ 4650 4600
NoConn ~ 4650 4900
Wire Wire Line
	3350 4600 3550 4600
$Comp
L GND #PWR037
U 1 1 5A7DCB10
P 3550 4800
F 0 "#PWR037" H 3550 4550 50  0001 C CNN
F 1 "GND" H 3550 4650 50  0000 C CNN
F 2 "" H 3550 4800 50  0001 C CNN
F 3 "" H 3550 4800 50  0001 C CNN
	1    3550 4800
	0    1    1    0   
$EndComp
Wire Wire Line
	4650 4800 4800 4800
Wire Wire Line
	4650 4700 4800 4700
$Comp
L TEST_1P J302
U 1 1 5A7DCB12
P 4800 4700
F 0 "J302" V 4800 4900 50  0000 C CNN
F 1 "CO2_TX" V 4700 4850 50  0000 C CNN
F 2 "" H 5000 4700 50  0001 C CNN
F 3 "" H 5000 4700 50  0001 C CNN
	1    4800 4700
	0    1    1    0   
$EndComp
$Comp
L TEST_1P J303
U 1 1 5A7DCB13
P 4800 4800
F 0 "J303" V 4800 5000 50  0000 C CNN
F 1 "CO2_RX" V 4900 4950 50  0000 C CNN
F 2 "" H 5000 4800 50  0001 C CNN
F 3 "" H 5000 4800 50  0001 C CNN
	1    4800 4800
	0    1    1    0   
$EndComp
$Comp
L TEST_1P J304
U 1 1 5A7DCB14
P 4800 5200
F 0 "J304" V 4800 5400 50  0000 C CNN
F 1 "GND" V 4900 5300 50  0000 C CNN
F 2 "" H 5000 5200 50  0001 C CNN
F 3 "" H 5000 5200 50  0001 C CNN
	1    4800 5200
	0    1    1    0   
$EndComp
$Comp
L GND #PWR038
U 1 1 5A7DCB15
P 4800 5200
F 0 "#PWR038" H 4800 4950 50  0001 C CNN
F 1 "GND" H 4800 5050 50  0000 C CNN
F 2 "" H 4800 5200 50  0001 C CNN
F 3 "" H 4800 5200 50  0001 C CNN
	1    4800 5200
	0    1    1    0   
$EndComp
Wire Notes Line
	5400 5500 5400 3950
$Comp
L MH-Z19 U302
U 1 1 5A7DCB16
P 4100 4700
F 0 "U302" H 4500 5050 60  0000 C CNN
F 1 "MH-Z19" H 4100 4450 60  0000 C CNN
F 2 "" H 4100 4750 60  0001 C CNN
F 3 "" H 4100 4750 60  0001 C CNN
	1    4100 4700
	1    0    0    -1  
$EndComp
$Comp
L C C304
U 1 1 5A7DCB19
P 3450 5050
F 0 "C304" H 3475 5150 50  0000 L CNN
F 1 "0.1uF" H 3475 4950 50  0000 L CNN
F 2 "" H 3488 4900 50  0001 C CNN
F 3 "" H 3450 5050 50  0001 C CNN
	1    3450 5050
	1    0    0    -1  
$EndComp
Connection ~ 3450 4900
NoConn ~ 3550 4700
$Comp
L TEST_1P J301
U 1 1 5A7DCB1A
P 3450 4600
F 0 "J301" H 3450 4870 50  0000 C CNN
F 1 "PWM" H 3450 4800 50  0000 C CNN
F 2 "" H 3650 4600 50  0001 C CNN
F 3 "" H 3650 4600 50  0001 C CNN
	1    3450 4600
	1    0    0    -1  
$EndComp
Connection ~ 3450 4600
Wire Notes Line
	5650 5500 5650 3950
$Comp
L CCS811 U301
U 1 1 5A7DCB50
P 5700 2950
F 0 "U301" H 6000 3450 30  0000 C CNN
F 1 "CCS811" H 5650 2900 30  0000 C CNN
F 2 "" H 5700 2950 30  0001 C CNN
F 3 "" H 5700 2950 30  0001 C CNN
	1    5700 2950
	1    0    0    -1  
$EndComp
Text GLabel 5250 3100 0    45   Input ~ 0
SCL
Text GLabel 5250 3200 0    45   Input ~ 0
SDA
NoConn ~ 5250 2750
Wire Wire Line
	5150 2650 5250 2650
Wire Wire Line
	4950 2300 6350 2300
Wire Wire Line
	5700 2300 5700 2200
$Comp
L +3.3V #PWR039
U 1 1 5A7DCB51
P 5700 2200
F 0 "#PWR039" H 5700 2050 50  0001 C CNN
F 1 "+3.3V" H 5700 2340 50  0000 C CNN
F 2 "" H 5700 2200 50  0001 C CNN
F 3 "" H 5700 2200 50  0001 C CNN
	1    5700 2200
	1    0    0    -1  
$EndComp
Wire Wire Line
	6150 2850 6150 2950
Wire Wire Line
	5700 3500 6350 3500
Wire Wire Line
	5750 3500 5750 3550
Connection ~ 5750 3500
$Comp
L GND #PWR040
U 1 1 5A7DCB52
P 5750 3550
F 0 "#PWR040" H 5750 3300 50  0001 C CNN
F 1 "GND" H 5750 3400 50  0000 C CNN
F 2 "" H 5750 3550 50  0001 C CNN
F 3 "" H 5750 3550 50  0001 C CNN
	1    5750 3550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5150 2650 5150 2300
$Comp
L R R301
U 1 1 5A7DCB53
P 4950 2550
F 0 "R301" V 5030 2550 50  0000 C CNN
F 1 "10k" V 4950 2550 50  0000 C CNN
F 2 "" V 4880 2550 50  0001 C CNN
F 3 "" H 4950 2550 50  0001 C CNN
	1    4950 2550
	1    0    0    -1  
$EndComp
Wire Wire Line
	4950 2400 4950 2300
Connection ~ 5150 2300
Wire Wire Line
	4800 2850 5250 2850
Wire Wire Line
	4950 2850 4950 2700
Connection ~ 4950 2850
Text GLabel 4800 2850 0    45   Input ~ 0
nCCS811
Wire Notes Line
	4250 3750 6650 3750
Wire Notes Line
	4250 3750 4250 1800
Wire Notes Line
	4250 1800 6650 1800
Text Notes 4300 1900 0    60   ~ 0
VOC Sensor
Text Notes 2450 4050 0    60   ~ 0
CO2 Sensor (Infrared)
Connection ~ 3150 4900
Connection ~ 3300 5200
Wire Wire Line
	3300 5250 3300 5200
Wire Wire Line
	3150 5200 3450 5200
$Comp
L GND #PWR041
U 1 1 5A7DCB18
P 3300 5250
F 0 "#PWR041" H 3300 5000 50  0001 C CNN
F 1 "GND" H 3300 5100 50  0000 C CNN
F 2 "" H 3300 5250 50  0001 C CNN
F 3 "" H 3300 5250 50  0001 C CNN
	1    3300 5250
	1    0    0    -1  
$EndComp
$Comp
L CP C303
U 1 1 5A7DCB17
P 3150 5050
F 0 "C303" H 3175 5150 50  0000 L CNN
F 1 "CP" H 3175 4950 50  0000 L CNN
F 2 "" H 3188 4900 50  0001 C CNN
F 3 "" H 3150 5050 50  0001 C CNN
	1    3150 5050
	1    0    0    -1  
$EndComp
Wire Notes Line
	2400 5500 2400 3950
Wire Notes Line
	2400 5500 5400 5500
Wire Notes Line
	2400 3950 5400 3950
Wire Wire Line
	3050 4900 3550 4900
$Comp
L +5V #PWR042
U 1 1 5A7DCB0E
P 3050 4900
F 0 "#PWR042" H 3050 4750 50  0001 C CNN
F 1 "+5V" H 3050 5040 50  0000 C CNN
F 2 "" H 3050 4900 50  0001 C CNN
F 3 "" H 3050 4900 50  0001 C CNN
	1    3050 4900
	0    -1   -1   0   
$EndComp
Text GLabel 3350 4600 0    45   Input ~ 0
CO2_SENSOR
Text GLabel 6800 4850 2    45   Input ~ 0
SDA
Text GLabel 6800 4700 2    45   Input ~ 0
SCL
$Comp
L C C301
U 1 1 5A7E16B5
P 6350 2950
F 0 "C301" H 6375 3050 50  0000 L CNN
F 1 "4.7u" H 6375 2850 50  0000 L CNN
F 2 "" H 6388 2800 50  0001 C CNN
F 3 "" H 6350 2950 50  0001 C CNN
	1    6350 2950
	1    0    0    -1  
$EndComp
Wire Wire Line
	6350 2300 6350 2800
Connection ~ 5700 2300
Wire Wire Line
	6350 3500 6350 3100
Connection ~ 5800 3500
Wire Notes Line
	6650 1800 6650 3750
Wire Wire Line
	6300 4400 5850 4400
Wire Wire Line
	5850 4400 5850 4600
Connection ~ 6300 4400
Wire Wire Line
	6300 5150 6300 5250
Wire Wire Line
	6300 5200 5850 5200
Wire Wire Line
	5850 5200 5850 4900
Connection ~ 6300 5200
Wire Notes Line
	5650 5500 7150 5500
Wire Notes Line
	7150 5500 7150 3950
Wire Notes Line
	7150 3950 5650 3950
$EndSCHEMATC