EESchema Schematic File Version 2 LIBS:lts-proto-rescue 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 2 2 Title "Sensors" Date "2018-03-11" Rev "AB" Comp "Let's Talk Science" Comment1 "Shawn Nock " Comment2 "" Comment3 "" Comment4 "" $EndDescr $Comp L Si7006-A20 U9 U 1 1 5A7DCB07 P 7050 3800 AR Path="/5A7DCB07" Ref="U9" Part="1" AR Path="/5A7DC600/5A7DCB07" Ref="U9" Part="1" F 0 "U9" H 7200 3550 39 0000 C CNN F 1 "Si7006-A20" V 6900 3700 39 0000 C CNN F 2 "lts:DFN6_SiLabs_3x3" H 7050 3800 39 0001 C CNN F 3 "" H 7050 3800 39 0001 C CNN F 4 "336-4155-1-ND" H 7050 3800 60 0001 C CNN "Digikey" F 5 "3.195" H 7050 3800 60 0001 C CNN "@100" F 6 "2.875" H 7050 3800 60 0001 C CNN "@1000" 1 7050 3800 1 0 0 -1 $EndComp Wire Wire Line 7350 3750 7500 3750 Wire Wire Line 7350 3900 7500 3900 $Comp L GND #PWR030 U 1 1 5A7DCB08 P 7000 4300 F 0 "#PWR030" H 7000 4050 50 0001 C CNN F 1 "GND" H 7000 4150 50 0000 C CNN F 2 "" H 7000 4300 50 0001 C CNN F 3 "" H 7000 4300 50 0001 C CNN 1 7000 4300 1 0 0 -1 $EndComp $Comp L +3.3V #PWR031 U 1 1 5A7DCB09 P 7000 3350 F 0 "#PWR031" H 7000 3200 50 0001 C CNN F 1 "+3.3V" H 7000 3490 50 0000 C CNN F 2 "" H 7000 3350 50 0001 C CNN F 3 "" H 7000 3350 50 0001 C CNN 1 7000 3350 1 0 0 -1 $EndComp Wire Wire Line 7000 3350 7000 3500 $Comp L C C14 U 1 1 5A7DCB0C P 6550 3800 F 0 "C14" H 6575 3900 50 0000 L CNN F 1 "0.1uF" H 6575 3700 50 0000 L CNN F 2 "Capacitors_SMD:C_0603_HandSoldering" H 6588 3650 50 0001 C CNN F 3 "" H 6550 3800 50 0001 C CNN 1 6550 3800 1 0 0 -1 $EndComp Text Notes 6400 3100 0 60 ~ 0 Temperature and Humidity NoConn ~ 4800 3600 NoConn ~ 4800 3700 NoConn ~ 4800 4000 $Comp L GND #PWR032 U 1 1 5A7DCB10 P 3700 3900 F 0 "#PWR032" H 3700 3650 50 0001 C CNN F 1 "GND" H 3700 3750 50 0000 C CNN F 2 "" H 3700 3900 50 0001 C CNN F 3 "" H 3700 3900 50 0001 C CNN 1 3700 3900 0 1 1 0 $EndComp Wire Notes Line 5550 4600 5550 3050 $Comp L MH-Z19 U7 U 1 1 5A7DCB16 P 4250 3800 F 0 "U7" H 4650 4150 60 0000 C CNN F 1 "MH-Z19" H 4250 3550 60 0000 C CNN F 2 "lts:MH-Z19" H 4250 3850 60 0001 C CNN F 3 "" H 4250 3850 60 0001 C CNN F 4 "18.00" H 4250 3800 60 0001 C CNN "@100" F 5 "17.1" H 4250 3800 60 0001 C CNN "@1000" 1 4250 3800 1 0 0 -1 $EndComp $Comp L C C12 U 1 1 5A7DCB19 P 3600 4150 F 0 "C12" H 3625 4250 50 0000 L CNN F 1 "0.1uF" H 3625 4050 50 0000 L CNN F 2 "Capacitors_SMD:C_0603_HandSoldering" H 3638 4000 50 0001 C CNN F 3 "" H 3600 4150 50 0001 C CNN 1 3600 4150 1 0 0 -1 $EndComp Connection ~ 3600 4000 NoConn ~ 3700 3800 Wire Notes Line 6350 4550 6350 3000 Text Notes 2600 3150 0 60 ~ 0 CO2 Sensor (Infrared) Wire Wire Line 3600 4350 3600 4300 $Comp L GND #PWR033 U 1 1 5A7DCB18 P 3600 4350 F 0 "#PWR033" H 3600 4100 50 0001 C CNN F 1 "GND" H 3600 4200 50 0000 C CNN F 2 "" H 3600 4350 50 0001 C CNN F 3 "" H 3600 4350 50 0001 C CNN 1 3600 4350 1 0 0 -1 $EndComp Wire Notes Line 2550 4600 2550 3050 Wire Notes Line 2550 4600 5550 4600 Wire Notes Line 2550 3050 5550 3050 Wire Wire Line 3200 4000 3700 4000 $Comp L +5V #PWR034 U 1 1 5A7DCB0E P 3200 4000 F 0 "#PWR034" H 3200 3850 50 0001 C CNN F 1 "+5V" H 3200 4140 50 0000 C CNN F 2 "" H 3200 4000 50 0001 C CNN F 3 "" H 3200 4000 50 0001 C CNN 1 3200 4000 0 -1 -1 0 $EndComp Text GLabel 3500 3700 0 45 Input ~ 0 CO2_SENSOR Text GLabel 7500 3900 2 45 Input ~ 0 SDA Text GLabel 7500 3750 2 45 Input ~ 0 SCL Wire Wire Line 7000 3450 6550 3450 Wire Wire Line 6550 3450 6550 3650 Connection ~ 7000 3450 Wire Wire Line 7000 4200 7000 4300 Wire Wire Line 7000 4250 6550 4250 Wire Wire Line 6550 4250 6550 3950 Connection ~ 7000 4250 Wire Notes Line 6350 4550 7850 4550 Wire Notes Line 7850 4550 7850 3000 Wire Notes Line 7850 3000 6350 3000 Text Notes 7300 4550 0 45 ~ 0 I2C Addr.: 0x40 Text Notes 2650 3250 0 30 ~ 0 CO2 (0-2000ppm; ±50ppm & 5%) Text Notes 6500 3150 0 30 ~ 0 ±1°C & 5% RH Wire Wire Line 3500 3700 3700 3700 NoConn ~ 4800 3900 NoConn ~ 4800 3800 $EndSCHEMATC