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 1 2
Title "LTS Prototype"
Date "2018-03-11"
Rev "AB"
Comp "Let's Talk Science"
Comment1 "Shawn Nock <shawn@monadnock.ca>"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text Notes 7700 2200 0    60   ~ 0
LED Array Face
Wire Wire Line
	9650 2400 10150 2400
Connection ~ 10050 2400
Connection ~ 9950 2400
Connection ~ 9850 2400
Connection ~ 9750 2400
$Comp
L GND #PWR01
U 1 1 5A7A186C
P 9900 2400
F 0 "#PWR01" H 9900 2150 50  0001 C CNN
F 1 "GND" H 9900 2250 50  0000 C CNN
F 2 "" H 9900 2400 50  0001 C CNN
F 3 "" H 9900 2400 50  0001 C CNN
	1    9900 2400
	1    0    0    -1  
$EndComp
Connection ~ 9900 2400
Wire Wire Line
	9550 2400 9550 3300
Wire Wire Line
	9450 2400 9450 2950
Wire Wire Line
	8850 2400 9350 2400
Connection ~ 9250 2400
Connection ~ 9150 2400
Connection ~ 9050 2400
Connection ~ 8950 2400
$Comp
L +3.3V #PWR02
U 1 1 5A7A1901
P 9100 2400
F 0 "#PWR02" H 9100 2250 50  0001 C CNN
F 1 "+3.3V" H 9100 2540 50  0000 C CNN
F 2 "" H 9100 2400 50  0001 C CNN
F 3 "" H 9100 2400 50  0001 C CNN
	1    9100 2400
	-1   0    0    1   
$EndComp
Connection ~ 9100 2400
NoConn ~ 10150 1900
NoConn ~ 8850 1900
NoConn ~ 8750 1900
NoConn ~ 8650 1900
NoConn ~ 8550 1900
NoConn ~ 8450 1900
NoConn ~ 7950 1900
NoConn ~ 7850 1900
NoConn ~ 7750 1900
NoConn ~ 7650 1900
NoConn ~ 7550 1900
NoConn ~ 6250 1900
Wire Wire Line
	8050 2400 8350 2400
Connection ~ 8250 2400
Connection ~ 8150 2400
Wire Wire Line
	8200 1900 8200 2700
Connection ~ 8200 2400
NoConn ~ 7850 2400
NoConn ~ 7750 2400
NoConn ~ 7650 2400
Wire Wire Line
	7150 2400 7450 2400
Connection ~ 7350 2400
Connection ~ 7250 2400
Wire Wire Line
	7300 1900 7300 2700
Connection ~ 7300 2400
NoConn ~ 7050 2400
NoConn ~ 6950 2400
NoConn ~ 6850 2400
NoConn ~ 6750 2400
Wire Wire Line
	6350 2400 6650 2400
Connection ~ 6550 2400
Connection ~ 6450 2400
NoConn ~ 6250 2400
Connection ~ 6500 2400
Text Label 6500 2700 1    60   ~ 0
P00
Text Label 7300 2700 1    60   ~ 0
P01
Text Label 8200 2700 1    60   ~ 0
P02
$Comp
L Conn_02x40_Row_Letter_First J18
U 1 1 5A7A1723
P 8150 2200
F 0 "J18" H 8200 4200 50  0000 C CNN
F 1 "Micro:bit Edge Connector" V 8200 2200 50  0000 C CNN
F 2 "lts:RBB40DHHN" H 8150 2200 50  0001 C CNN
F 3 "" H 8150 2200 50  0001 C CNN
F 4 "S3389-ND" H 8150 2200 60  0001 C CNN "Digikey"
F 5 "11.39" H 8150 2200 60  0001 C CNN "@100"
F 6 "10.89" H 8150 2200 60  0001 C CNN "@1000"
	1    8150 2200
	0    -1   -1   0   
$EndComp
Wire Wire Line
	8950 1900 9250 1900
Connection ~ 9150 1900
Connection ~ 9050 1900
Wire Wire Line
	7150 1900 7450 1900
Connection ~ 7350 1900
Connection ~ 7250 1900
Wire Wire Line
	6350 1900 6650 1900
Connection ~ 6550 1900
Connection ~ 6450 1900
Connection ~ 6500 1900
Connection ~ 7300 1900
Wire Wire Line
	9100 2400 9100 1900
Connection ~ 9100 1900
Wire Wire Line
	8050 1900 8350 1900
Connection ~ 8150 1900
Connection ~ 8250 1900
Connection ~ 8200 1900
NoConn ~ 7950 2400
Text Label 8750 2700 1    60   ~ 0
P16
Text Label 8650 2700 1    60   ~ 0
P15
Text Label 8450 2700 1    60   ~ 0
P13
$Comp
L USB_OTG J1
U 1 1 5A7BAC5E
P 1000 2550
F 0 "J1" H 800 3000 50  0000 L CNN
F 1 "USB_B" H 800 2900 50  0000 L CNN
F 2 "lts:USB_Micro-B_APCircuits" H 1150 2500 50  0001 C CNN
F 3 "" H 1150 2500 50  0001 C CNN
F 4 "609-4618-1-ND" H 1000 2550 60  0001 C CNN "Digikey"
F 5 "0.4077" H 1000 2550 60  0001 C CNN "@100"
F 6 "0.3494" H 1000 2550 60  0001 C CNN "@1000"
	1    1000 2550
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR03
U 1 1 5A7BAC5F
P 1000 3200
F 0 "#PWR03" H 1000 2950 50  0001 C CNN
F 1 "GND" H 1000 3050 50  0000 C CNN
F 2 "" H 1000 3200 50  0001 C CNN
F 3 "" H 1000 3200 50  0001 C CNN
	1    1000 3200
	1    0    0    -1  
$EndComp
$Comp
L +3.3V #PWR04
U 1 1 5A7BAC69
P 2800 1050
F 0 "#PWR04" H 2800 900 50  0001 C CNN
F 1 "+3.3V" H 2800 1190 50  0000 C CNN
F 2 "" H 2800 1050 50  0001 C CNN
F 3 "" H 2800 1050 50  0001 C CNN
	1    2800 1050
	1    0    0    -1  
$EndComp
Wire Wire Line
	1000 2950 1000 3200
Wire Wire Line
	900  2950 1000 2950
Wire Wire Line
	1300 2650 3200 2650
Wire Wire Line
	1300 2550 3200 2550
Wire Wire Line
	1300 2350 2500 2350
Wire Wire Line
	2500 2350 2500 2100
Wire Wire Line
	2500 2100 3200 2100
Wire Wire Line
	3050 2100 3050 2000
Wire Wire Line
	3050 2000 3200 2000
Connection ~ 3050 2100
$Comp
L GND #PWR05
U 1 1 5A7BAC6B
P 2700 3400
F 0 "#PWR05" H 2700 3150 50  0001 C CNN
F 1 "GND" H 2700 3250 50  0000 C CNN
F 2 "" H 2700 3400 50  0001 C CNN
F 3 "" H 2700 3400 50  0001 C CNN
	1    2700 3400
	1    0    0    -1  
$EndComp
Connection ~ 1550 2350
$Comp
L TEST_1P J12
U 1 1 5A7BAC6D
P 3750 7100
F 0 "J12" H 3750 7370 50  0000 C CNN
F 1 "5V" H 3750 7300 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 3950 7100 50  0001 C CNN
F 3 "" H 3950 7100 50  0001 C CNN
	1    3750 7100
	1    0    0    -1  
$EndComp
$Comp
L VBUS #PWR06
U 1 1 5A7BAC6E
P 3750 7100
F 0 "#PWR06" H 3750 6950 50  0001 C CNN
F 1 "VBUS" H 3750 7250 50  0000 C CNN
F 2 "" H 3750 7100 50  0001 C CNN
F 3 "" H 3750 7100 50  0001 C CNN
	1    3750 7100
	-1   0    0    1   
$EndComp
$Comp
L R R1
U 1 1 5A7BAC6F
P 3050 2250
F 0 "R1" V 3130 2250 50  0000 C CNN
F 1 "1k" V 3050 2250 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 2980 2250 50  0001 C CNN
F 3 "" H 3050 2250 50  0001 C CNN
F 4 "5%" V 3050 2250 60  0001 C CNN "Notes"
	1    3050 2250
	0    1    1    0   
$EndComp
$Comp
L VBUS #PWR07
U 1 1 5A7BAC70
P 1300 1100
F 0 "#PWR07" H 1300 950 50  0001 C CNN
F 1 "VBUS" H 1300 1250 50  0000 C CNN
F 2 "" H 1300 1100 50  0001 C CNN
F 3 "" H 1300 1100 50  0001 C CNN
	1    1300 1100
	1    0    0    -1  
$EndComp
$Comp
L C C1
U 1 1 5A7BAC71
P 1150 1300
F 0 "C1" H 1050 1400 50  0000 L CNN
F 1 "4.7uF" H 900 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" H 1188 1150 50  0001 C CNN
F 3 "" H 1150 1300 50  0001 C CNN
F 4 "587-2990-1-ND" H 1150 1300 60  0001 C CNN "Digikey"
F 5 "0.1549" H 1150 1300 60  0001 C CNN "@100"
F 6 "0.0956" H 1150 1300 60  0001 C CNN "@1000"
F 7 "16V" H 1150 1300 60  0001 C CNN "Notes"
	1    1150 1300
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 5A7BAC72
P 1450 1300
F 0 "C2" H 1475 1400 50  0000 L CNN
F 1 "0.1uF" H 1475 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 1488 1150 50  0001 C CNN
F 3 "" H 1450 1300 50  0001 C CNN
F 4 "16V" H 1450 1300 60  0001 C CNN "Notes"
	1    1450 1300
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR08
U 1 1 5A7BAC73
P 1300 1500
F 0 "#PWR08" H 1300 1250 50  0001 C CNN
F 1 "GND" H 1300 1350 50  0000 C CNN
F 2 "" H 1300 1500 50  0001 C CNN
F 3 "" H 1300 1500 50  0001 C CNN
	1    1300 1500
	1    0    0    -1  
$EndComp
Wire Wire Line
	1150 1150 1450 1150
Wire Wire Line
	1300 1150 1300 1100
Connection ~ 1300 1150
Wire Wire Line
	1300 1500 1300 1450
Wire Wire Line
	1150 1450 1450 1450
Connection ~ 1300 1450
$Comp
L C C4
U 1 1 5A7BAC74
P 2300 1300
F 0 "C4" H 2200 1400 50  0000 L CNN
F 1 "4.7uF" H 2050 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2338 1150 50  0001 C CNN
F 3 "" H 2300 1300 50  0001 C CNN
F 4 "10V" H 2300 1300 60  0001 C CNN "Notes"
	1    2300 1300
	-1   0    0    1   
$EndComp
$Comp
L C C5
U 1 1 5A7BAC75
P 2000 1300
F 0 "C5" H 2025 1400 50  0000 L CNN
F 1 "0.1uF" H 2025 1200 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 2038 1150 50  0001 C CNN
F 3 "" H 2000 1300 50  0001 C CNN
F 4 "10V" H 2000 1300 60  0001 C CNN "Notes"
	1    2000 1300
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR09
U 1 1 5A7BAC76
P 2150 1100
F 0 "#PWR09" H 2150 850 50  0001 C CNN
F 1 "GND" H 2150 950 50  0000 C CNN
F 2 "" H 2150 1100 50  0001 C CNN
F 3 "" H 2150 1100 50  0001 C CNN
	1    2150 1100
	-1   0    0    1   
$EndComp
Wire Wire Line
	2000 1450 2300 1450
Wire Wire Line
	2150 1100 2150 1150
Wire Wire Line
	2000 1150 2300 1150
Connection ~ 2150 1150
Wire Wire Line
	8450 2400 8450 2700
Wire Wire Line
	8650 2400 8650 2700
Wire Wire Line
	8750 2400 8750 2700
Wire Wire Line
	4750 2400 4950 2400
Wire Wire Line
	4750 2500 4950 2500
NoConn ~ 4750 2850
NoConn ~ 4750 2950
NoConn ~ 4750 1950
$Comp
L GND #PWR010
U 1 1 5A7CF61E
P 3950 3500
F 0 "#PWR010" H 3950 3250 50  0001 C CNN
F 1 "GND" H 3950 3350 50  0000 C CNN
F 2 "" H 3950 3500 50  0001 C CNN
F 3 "" H 3950 3500 50  0001 C CNN
	1    3950 3500
	1    0    0    -1  
$EndComp
$Comp
L D_Schottky D1
U 1 1 5A7CF6D6
P 2900 1450
F 0 "D1" H 2900 1550 50  0000 C CNN
F 1 "BAT60A" H 2900 1350 50  0000 C CNN
F 2 "Diodes_SMD:D_SOD-323" H 2900 1450 50  0001 C CNN
F 3 "" H 2900 1450 50  0001 C CNN
F 4 "BAT60AE6327HTSA1CT-ND" H 2900 1450 60  0001 C CNN "Digikey"
F 5 "0.28" H 2900 1450 60  0001 C CNN "@100"
F 6 "0.147" H 2900 1450 60  0001 C CNN "@1000"
F 7 "Schottky, Minimize voltage drop @ 100mA" H 2900 1450 60  0001 C CNN "Notes"
	1    2900 1450
	0    1    1    0   
$EndComp
Wire Wire Line
	2900 1600 2900 2250
Connection ~ 2900 1950
Wire Notes Line
	700  700  700  4100
Wire Notes Line
	5800 700  700  700 
Text Notes 750  4050 0    60   ~ 0
USB Power and Data Collection UART
Text Notes 1450 3650 0    30   ~ 0
Surge / Transient Protection
Wire Notes Line
	1400 2850 2850 2850
Wire Notes Line
	1400 3650 2850 3650
Text GLabel 8750 2700 3    45   Input ~ 0
COMPUTER_TXO
Text GLabel 8650 2700 3    45   Output ~ 0
COMPUTER_RXI
Text GLabel 4950 2400 2    45   Input ~ 0
COMPUTER_RXI
Text GLabel 4950 2500 2    45   Output ~ 0
COMPUTER_TXO
Text GLabel 9550 3300 3    45   BiDi ~ 0
SDA
Text GLabel 9450 2950 3    45   Output ~ 0
SCL
Text Label 9450 2700 1    60   ~ 0
P19
Text Label 9550 2700 1    60   ~ 0
P20
$Sheet
S 650  6850 950  900 
U 5A7DC600
F0 "Sensors" 60
F1 "sensors.sch" 60
$EndSheet
Text GLabel 8450 2700 3    45   Input ~ 0
CO2_SENSOR
$Comp
L R R9
U 1 1 5A7DFB2A
P 9950 2900
F 0 "R9" V 10030 2900 50  0000 C CNN
F 1 "4.7k" V 9950 2900 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 9880 2900 50  0001 C CNN
F 3 "" H 9950 2900 50  0001 C CNN
F 4 "5%" V 9950 2900 60  0001 C CNN "Notes"
	1    9950 2900
	0    1    1    0   
$EndComp
$Comp
L R R10
U 1 1 5A7DFBF1
P 9950 3200
F 0 "R10" V 10030 3200 50  0000 C CNN
F 1 "4.7k" V 9950 3200 50  0000 C CNN
F 2 "Resistors_SMD:R_0603_HandSoldering" V 9880 3200 50  0001 C CNN
F 3 "" H 9950 3200 50  0001 C CNN
	1    9950 3200
	0    1    1    0   
$EndComp
Wire Wire Line
	10100 2900 10100 3200
$Comp
L +3.3V #PWR011
U 1 1 5A7DFD12
P 10300 2950
F 0 "#PWR011" H 10300 2800 50  0001 C CNN
F 1 "+3.3V" H 10300 3090 50  0000 C CNN
F 2 "" H 10300 2950 50  0001 C CNN
F 3 "" H 10300 2950 50  0001 C CNN
	1    10300 2950
	1    0    0    -1  
$EndComp
Wire Wire Line
	10100 3000 10300 3000
Wire Wire Line
	10300 3000 10300 2950
Connection ~ 10100 3000
Connection ~ 9550 3200
Text Notes 3900 6750 0    60   ~ 0
Test Points
Connection ~ 9450 2900
$Comp
L PWR_FLAG #FLG012
U 1 1 5A7EC327
P 2900 1050
F 0 "#FLG012" H 2900 1125 50  0001 C CNN
F 1 "PWR_FLAG" H 2900 1200 50  0000 C CNN
F 2 "" H 2900 1050 50  0001 C CNN
F 3 "" H 2900 1050 50  0001 C CNN
	1    2900 1050
	0    1    1    0   
$EndComp
Wire Wire Line
	2900 1300 2900 1050
Wire Wire Line
	2900 1050 2800 1050
Text Notes 2750 850  0    45   Italic 0
95mA
Wire Wire Line
	9800 3200 9550 3200
Wire Wire Line
	9800 2900 9450 2900
Text GLabel 4250 7100 3    45   Input ~ 0
COMPUTER_RXI
Text GLabel 4000 7100 3    45   Input ~ 0
COMPUTER_TXO
Wire Wire Line
	1550 2200 1550 3400
$Comp
L VBUS #PWR013
U 1 1 5A7DE3D0
P 1550 2200
F 0 "#PWR013" H 1550 2050 50  0001 C CNN
F 1 "VBUS" H 1550 2350 50  0000 C CNN
F 2 "" H 1550 2200 50  0001 C CNN
F 3 "" H 1550 2200 50  0001 C CNN
	1    1550 2200
	1    0    0    -1  
$EndComp
Wire Notes Line
	700  4100 5800 4100
Wire Notes Line
	5800 4100 5800 700 
$Comp
L TEST_1P J14
U 1 1 5A7E17FC
P 4250 7100
F 0 "J14" H 4250 7370 50  0000 C CNN
F 1 "RXI" H 4250 7300 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4450 7100 50  0001 C CNN
F 3 "" H 4450 7100 50  0001 C CNN
	1    4250 7100
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J13
U 1 1 5A7E1802
P 4000 7100
F 0 "J13" H 4000 7370 50  0000 C CNN
F 1 "TXO" H 4000 7300 50  0000 C CNN
F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4200 7100 50  0001 C CNN
F 3 "" H 4200 7100 50  0001 C CNN
	1    4000 7100
	1    0    0    -1  
$EndComp
$Comp
L Speaker_Ultrasound LS1
U 1 1 5A7EA06A
P 6950 3750
F 0 "LS1" H 6950 3550 50  0000 R CNN
F 1 "Piezo Speaker" H 7200 4000 50  0000 R CNN
F 2 "lts:Murata_PKMCS0909E4000_HandSoldering" H 6915 3700 50  0001 C CNN
F 3 "" H 6915 3700 50  0001 C CNN
F 4 "490-9647-1-ND" H 6950 3750 60  0001 C CNN "Digikey"
F 5 "1.527" H 6950 3750 60  0001 C CNN "@100"
F 6 "1.302" H 6950 3750 60  0001 C CNN "@1000"
	1    6950 3750
	-1   0    0    1   
$EndComp
Text Label 7550 2700 1    60   ~ 0
P08
Wire Wire Line
	7550 2400 7550 2700
Wire Wire Line
	6500 1900 6500 2700
$Comp
L GND #PWR014
U 1 1 5A7EBE65
P 7300 3750
F 0 "#PWR014" H 7300 3500 50  0001 C CNN
F 1 "GND" H 7300 3600 50  0000 C CNN
F 2 "" H 7300 3750 50  0001 C CNN
F 3 "" H 7300 3750 50  0001 C CNN
	1    7300 3750
	1    0    0    -1  
$EndComp
Wire Wire Line
	7150 3750 7300 3750
Wire Notes Line
	6450 3350 8000 3350
Text Notes 6500 3450 0    60   ~ 0
Audio
Text Notes 6750 4150 0    30   ~ 0
Multi-tone using the makecode "Music" blocks
Wire Notes Line
	6450 4150 8000 4150
Wire Notes Line
	6450 4150 6450 3350
$Comp
L Conn_01x01 J4
U 1 1 5A7ED14E
P 3050 4700
F 0 "J4" H 3050 4800 50  0000 C CNN
F 1 "P1" H 3050 4600 50  0000 C CNN
F 2 "lts:MountingHole_3.2mm_M3_Pad_APCircuits" H 3050 4700 50  0001 C CNN
F 3 "" H 3050 4700 50  0001 C CNN
	1    3050 4700
	-1   0    0    1   
$EndComp
$Comp
L Conn_01x01 J6
U 1 1 5A7ED2C6
P 3050 5200
F 0 "J6" H 3050 5300 50  0000 C CNN
F 1 "P8" H 3050 5100 50  0000 C CNN
F 2 "lts:MountingHole_3.2mm_M3_Pad_APCircuits" H 3050 5200 50  0001 C CNN
F 3 "" H 3050 5200 50  0001 C CNN
	1    3050 5200
	-1   0    0    1   
$EndComp
$Comp
L Conn_01x01 J7
U 1 1 5A7ED366
P 3050 5500
F 0 "J7" H 3050 5600 50  0000 C CNN
F 1 "GND" H 3050 5400 50  0000 C CNN
F 2 "lts:MountingHole_3.2mm_M3_Pad_APCircuits" H 3050 5500 50  0001 C CNN
F 3 "" H 3050 5500 50  0001 C CNN
	1    3050 5500
	-1   0    0    1   
$EndComp
$Comp
L Conn_01x01 J5
U 1 1 5A7ED733
P 3050 4950
F 0 "J5" H 3050 5050 50  0000 C CNN
F 1 "P2" H 3050 4850 50  0000 C CNN
F 2 "lts:MountingHole_3.2mm_M3_Pad_APCircuits" H 3050 4950 50  0001 C CNN
F 3 "" H 3050 4950 50  0001 C CNN
	1    3050 4950
	-1   0    0    1   
$EndComp
$Comp
L Conn_01x04 J3
U 1 1 5A7EDA1D
P 2350 4850
F 0 "J3" H 2350 5050 50  0000 C CNN
F 1 "GROVE_I2C" V 2450 4800 50  0000 C CNN
F 2 "lts:Grove_Connector_Angled_1x04_Pitch2.00mm" H 2350 4850 50  0001 C CNN
F 3 "" H 2350 4850 50  0001 C CNN
	1    2350 4850
	-1   0    0    -1  
$EndComp
$Comp
L Conn_01x01 J8
U 1 1 5A7EDB1D
P 3050 5750
F 0 "J8" H 3050 5850 50  0000 C CNN
F 1 "3V3" H 3050 5650 50  0000 C CNN
F 2 "lts:MountingHole_3.2mm_M3_Pad_APCircuits" H 3050 5750 50  0001 C CNN
F 3 "" H 3050 5750 50  0001 C CNN
	1    3050 5750
	-1   0    0    1   
$EndComp
Wire Wire Line
	3250 4700 3400 4700
Wire Wire Line
	3250 4950 3400 4950
Wire Wire Line
	3250 5200 3400 5200
Text Label 3400 4700 0    60   ~ 0
P00
Text Label 3400 4950 0    60   ~ 0
P01
Text Label 3400 5200 0    60   ~ 0
P02
$Comp
L GND #PWR015
U 1 1 5A7EEBFF
P 3250 5500
F 0 "#PWR015" H 3250 5250 50  0001 C CNN
F 1 "GND" H 3250 5350 50  0000 C CNN
F 2 "" H 3250 5500 50  0001 C CNN
F 3 "" H 3250 5500 50  0001 C CNN
	1    3250 5500
	0    -1   -1   0   
$EndComp
$Comp
L +3.3V #PWR016
U 1 1 5A7EEC77
P 3250 5750
F 0 "#PWR016" H 3250 5600 50  0001 C CNN
F 1 "+3.3V" H 3250 5890 50  0000 C CNN
F 2 "" H 3250 5750 50  0001 C CNN
F 3 "" H 3250 5750 50  0001 C CNN
	1    3250 5750
	0    1    1    0   
$EndComp
$Comp
L GND #PWR017
U 1 1 5A7EFE7A
P 2550 5050
F 0 "#PWR017" H 2550 4800 50  0001 C CNN
F 1 "GND" H 2550 4900 50  0000 C CNN
F 2 "" H 2550 5050 50  0001 C CNN
F 3 "" H 2550 5050 50  0001 C CNN
	1    2550 5050
	1    0    0    -1  
$EndComp
Text GLabel 2550 4750 2    45   Input ~ 0
SCL
Text GLabel 2550 4850 2    45   Input ~ 0
SDA
$Comp
L +5V #PWR018
U 1 1 5A7F0111
P 2700 4950
F 0 "#PWR018" H 2700 4800 50  0001 C CNN
F 1 "+5V" H 2700 5090 50  0000 C CNN
F 2 "" H 2700 4950 50  0001 C CNN
F 3 "" H 2700 4950 50  0001 C CNN
	1    2700 4950
	-1   0    0    1   
$EndComp
Wire Wire Line
	2550 4950 2700 4950
Text Notes 2150 4450 0    60   ~ 0
User Expansion
Wire Notes Line
	2100 4350 3700 4350
Wire Wire Line
	2150 1450 2150 1950
Connection ~ 2150 1450
$Comp
L Jumper JP1
U 1 1 5A85FC17
P 7450 3650
F 0 "JP1" H 7450 3650 50  0000 C CNN
F 1 "Buzzer Enable" H 7450 3850 50  0000 C CNN
F 2 "lts:Pin_Header_Straight_1x02_Pitch2.54mm_APCircuits" H 7450 3650 50  0001 C CNN
F 3 "" H 7450 3650 50  0001 C CNN
	1    7450 3650
	1    0    0    -1  
$EndComp
Wire Wire Line
	7750 3650 7950 3650
Text Label 7950 3650 2    60   ~ 0
P00
Wire Notes Line
	8000 4150 8000 3350
Wire Notes Line
	3700 4350 3700 6000
Wire Notes Line
	3700 6000 2100 6000
Wire Notes Line
	2100 6000 2100 4350
$Comp
L VBUS #PWR019
U 1 1 5A7DFE67
P 4950 5050
F 0 "#PWR019" H 4950 4900 50  0001 C CNN
F 1 "VBUS" H 4950 5200 50  0000 C CNN
F 2 "" H 4950 5050 50  0001 C CNN
F 3 "" H 4950 5050 50  0001 C CNN
	1    4950 5050
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4950 5050 5100 5050
$Comp
L D_Schottky D2
U 1 1 5A85E951
P 5250 5050
F 0 "D2" H 5250 5150 50  0000 C CNN
F 1 "BAT60A" H 5250 4950 50  0000 C CNN
F 2 "Diodes_SMD:D_SOD-323" H 5250 5050 50  0001 C CNN
F 3 "" H 5250 5050 50  0001 C CNN
	1    5250 5050
	-1   0    0    1   
$EndComp
$Comp
L +5V #PWR020
U 1 1 5A8644EE
P 5550 5050
F 0 "#PWR020" H 5550 4900 50  0001 C CNN
F 1 "+5V" H 5550 5190 50  0000 C CNN
F 2 "" H 5550 5050 50  0001 C CNN
F 3 "" H 5550 5050 50  0001 C CNN
	1    5550 5050
	0    1    1    0   
$EndComp
Wire Wire Line
	5400 5050 5550 5050
$Comp
L TPD3E001 U1
U 1 1 5A870DAB
P 2150 3300
F 0 "U1" H 2450 3600 60  0000 C CNN
F 1 "TPD3E001" H 2100 3050 60  0000 C CNN
F 2 "lts:DFN-6-1EP_3x3mm_Pitch0.95mm_TI_PWSON" H 2150 3100 60  0001 C CNN
F 3 "" H 2150 3100 60  0001 C CNN
F 4 "296-22851-1-ND" H 2150 3300 60  0001 C CNN "Digikey"
F 5 "0.43" H 2150 3300 60  0001 C CNN "@100"
F 6 "0.3385" H 2150 3300 60  0001 C CNN "@1000"
	1    2150 3300
	1    0    0    -1  
$EndComp
NoConn ~ 1600 3300
Wire Wire Line
	2700 3400 2700 3300
Wire Wire Line
	1550 3400 1600 3400
Wire Notes Line
	1400 3650 1400 2850
Wire Notes Line
	2850 3650 2850 2850
NoConn ~ 2050 2850
Wire Wire Line
	2150 2850 2150 2650
Connection ~ 2150 2650
Wire Wire Line
	2250 2850 2250 2550
Connection ~ 2250 2550
$Comp
L PWR_FLAG #FLG021
U 1 1 5A875A2B
P 1800 2350
F 0 "#FLG021" H 1800 2425 50  0001 C CNN
F 1 "PWR_FLAG" H 1800 2500 50  0000 C CNN
F 2 "" H 1800 2350 50  0001 C CNN
F 3 "" H 1800 2350 50  0001 C CNN
	1    1800 2350
	1    0    0    -1  
$EndComp
Connection ~ 1800 2350
NoConn ~ 1300 2750
$Comp
L PWR_FLAG #FLG022
U 1 1 5A876003
P 5500 4950
F 0 "#FLG022" H 5500 5025 50  0001 C CNN
F 1 "PWR_FLAG" H 5500 5100 50  0000 C CNN
F 2 "" H 5500 4950 50  0001 C CNN
F 3 "" H 5500 4950 50  0001 C CNN
	1    5500 4950
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 5050 5500 4950
Connection ~ 5500 5050
$Comp
L PWR_FLAG #FLG023
U 1 1 5A87692F
P 1000 3100
F 0 "#FLG023" H 1000 3175 50  0001 C CNN
F 1 "PWR_FLAG" H 1000 3250 50  0000 C CNN
F 2 "" H 1000 3100 50  0001 C CNN
F 3 "" H 1000 3100 50  0001 C CNN
	1    1000 3100
	0    1    1    0   
$EndComp
Connection ~ 1000 3100
NoConn ~ 4750 1700
NoConn ~ 4750 2150
NoConn ~ 4100 1500
NoConn ~ 4000 1500
NoConn ~ 3900 1500
NoConn ~ 3800 1500
Wire Wire Line
	3900 3450 4000 3450
Wire Wire Line
	3950 3500 3950 3500
Wire Wire Line
	3950 3500 3950 3450
Connection ~ 3950 3450
NoConn ~ 3200 3250
NoConn ~ 3200 3150
Wire Wire Line
	3200 1800 2900 1800
Connection ~ 2900 1800
Wire Wire Line
	3200 1700 2900 1700
Connection ~ 2900 1700
Wire Wire Line
	2150 1950 2900 1950
$Comp
L CP2102N U2
U 1 1 5A8D8B17
P 3950 2450
F 0 "U2" H 4600 3350 60  0000 C CNN
F 1 "CP2102N" H 4400 1600 60  0000 C CNN
F 2 "lts:QFN-24-1EP_4x4mm_Pitch0.5mm_APCircuits" H 3950 2450 60  0001 C CNN
F 3 "" H 3950 2450 60  0001 C CNN
	1    3950 2450
	1    0    0    -1  
$EndComp
$Comp
L Conn_01x06_Male J2
U 1 1 5AA698EF
P 9400 4750
F 0 "J2" H 9400 5050 50  0000 C CNN
F 1 "Arduino Analog" H 9400 4350 50  0000 C CNN
F 2 "lts:Pin_Header_Straight_1x06_Pitch2.54mm_Friction" H 9400 4750 50  0001 C CNN
F 3 "" H 9400 4750 50  0001 C CNN
	1    9400 4750
	1    0    0    -1  
$EndComp
$Comp
L Conn_01x08_Male J10
U 1 1 5AA6996A
P 8900 5800
F 0 "J10" H 8900 6200 50  0000 C CNN
F 1 "Arduino Power" H 8900 5300 50  0000 C CNN
F 2 "lts:Pin_Header_Straight_1x08_Pitch2.54mm_Friction" H 8900 5800 50  0001 C CNN
F 3 "" H 8900 5800 50  0001 C CNN
	1    8900 5800
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR024
U 1 1 5AA69CB2
P 9300 5450
F 0 "#PWR024" H 9300 5300 50  0001 C CNN
F 1 "+5V" H 9300 5590 50  0000 C CNN
F 2 "" H 9300 5450 50  0001 C CNN
F 3 "" H 9300 5450 50  0001 C CNN
	1    9300 5450
	1    0    0    -1  
$EndComp
NoConn ~ 9100 6200
NoConn ~ 9100 5500
$Comp
L +3.3V #PWR025
U 1 1 5AA69E99
P 9400 5800
F 0 "#PWR025" H 9400 5650 50  0001 C CNN
F 1 "+3.3V" H 9400 5940 50  0000 C CNN
F 2 "" H 9400 5800 50  0001 C CNN
F 3 "" H 9400 5800 50  0001 C CNN
	1    9400 5800
	0    1    1    0   
$EndComp
Wire Wire Line
	9300 5900 9100 5900
Wire Wire Line
	9300 5450 9300 5900
Wire Wire Line
	9100 5600 9300 5600
Connection ~ 9300 5600
Wire Wire Line
	9100 6000 9300 6000
Wire Wire Line
	9300 6000 9300 6350
Wire Wire Line
	9100 6100 9300 6100
Connection ~ 9300 6100
$Comp
L GND #PWR026
U 1 1 5AA6A250
P 9300 6350
F 0 "#PWR026" H 9300 6100 50  0001 C CNN
F 1 "GND" H 9300 6200 50  0000 C CNN
F 2 "" H 9300 6350 50  0001 C CNN
F 3 "" H 9300 6350 50  0001 C CNN
	1    9300 6350
	1    0    0    -1  
$EndComp
Wire Wire Line
	9100 5800 9400 5800
Wire Wire Line
	9600 4550 9850 4550
Wire Wire Line
	9600 4650 9850 4650
Wire Wire Line
	9600 4750 9850 4750
Text Label 9850 4650 0    60   ~ 0
P01
Text Label 9850 4550 0    60   ~ 0
P00
Text Label 9850 4750 0    60   ~ 0
P02
Wire Wire Line
	9600 5050 9850 5050
Wire Wire Line
	9600 4950 9850 4950
Wire Wire Line
	9600 4850 9850 4850
Text GLabel 9850 5050 2    45   Output ~ 0
SCL
Text GLabel 9850 4950 2    45   BiDi ~ 0
SDA
Text GLabel 9850 4850 2    45   Input ~ 0
CO2_SENSOR
Wire Wire Line
	9100 5700 9450 5700
Wire Wire Line
	9450 5700 9450 5600
Wire Wire Line
	9450 5600 9650 5600
Text Label 9650 5600 0    60   ~ 0
ARDU_RST
$Comp
L Conn_01x08_Male J9
U 1 1 5AA6D0C5
P 8000 5100
F 0 "J9" H 8000 5500 50  0000 C CNN
F 1 "Arduino DIO" H 8000 4600 50  0000 C CNN
F 2 "lts:Pin_Header_Straight_1x08_Pitch2.54mm_Friction" H 8000 5100 50  0001 C CNN
F 3 "" H 8000 5100 50  0001 C CNN
	1    8000 5100
	1    0    0    -1  
$EndComp
Wire Wire Line
	8200 4800 8350 4800
Wire Wire Line
	8200 4900 8350 4900
Text GLabel 8350 4800 2    45   Input ~ 0
COMPUTER_TXO
Text GLabel 8350 4900 2    45   Output ~ 0
COMPUTER_RXI
NoConn ~ 8200 5000
NoConn ~ 8200 5100
NoConn ~ 8200 5200
NoConn ~ 8200 5300
NoConn ~ 8200 5400
NoConn ~ 8200 5500
Wire Wire Line
	4750 2050 5150 2050
Text Label 5150 2050 0    60   ~ 0
ARDU_RST
NoConn ~ 7550 2700
Wire Wire Line
	8550 2400 8550 2700
Text Label 8550 2700 1    60   ~ 0
P14
NoConn ~ 8550 2700
$Comp
L Conn_01x04 J11
U 1 1 5AA6F47B
P 2350 5550
F 0 "J11" H 2350 5750 50  0000 C CNN
F 1 "GROVE_AD" V 2450 5500 50  0000 C CNN
F 2 "lts:Grove_Connector_Angled_1x04_Pitch2.00mm" H 2350 5550 50  0001 C CNN
F 3 "" H 2350 5550 50  0001 C CNN
	1    2350 5550
	-1   0    0    -1  
$EndComp
Text Label 2550 5450 0    60   ~ 0
P01
Text Label 2550 5550 0    60   ~ 0
P02
$Comp
L +5V #PWR027
U 1 1 5AA6FCD7
P 2700 5650
F 0 "#PWR027" H 2700 5500 50  0001 C CNN
F 1 "+5V" H 2700 5790 50  0000 C CNN
F 2 "" H 2700 5650 50  0001 C CNN
F 3 "" H 2700 5650 50  0001 C CNN
	1    2700 5650
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR028
U 1 1 5AA6FD39
P 2550 5750
F 0 "#PWR028" H 2550 5500 50  0001 C CNN
F 1 "GND" H 2550 5600 50  0000 C CNN
F 2 "" H 2550 5750 50  0001 C CNN
F 3 "" H 2550 5750 50  0001 C CNN
	1    2550 5750
	1    0    0    -1  
$EndComp
Wire Wire Line
	2550 5650 2700 5650
$Comp
L +5V #PWR029
U 1 1 5AA6B554
P 6900 1550
F 0 "#PWR029" H 6900 1400 50  0001 C CNN
F 1 "+5V" H 6900 1690 50  0000 C CNN
F 2 "" H 6900 1550 50  0001 C CNN
F 3 "" H 6900 1550 50  0001 C CNN
	1    6900 1550
	1    0    0    -1  
$EndComp
$Comp
L D_Schottky D3
U 1 1 5AA7D23E
P 6900 1700
F 0 "D3" H 6900 1800 50  0000 C CNN
F 1 "BAT60A" H 6900 1600 50  0000 C CNN
F 2 "Diodes_SMD:D_SOD-323" H 6900 1700 50  0001 C CNN
F 3 "" H 6900 1700 50  0001 C CNN
F 4 "BAT60AE6327HTSA1CT-ND" H 6900 1700 60  0001 C CNN "Digikey"
F 5 "0.28" H 6900 1700 60  0001 C CNN "@100"
F 6 "0.147" H 6900 1700 60  0001 C CNN "@1000"
F 7 "Schottky, Minimize voltage drop @ 100mA" H 6900 1700 60  0001 C CNN "Notes"
	1    6900 1700
	0    1    1    0   
$EndComp
Wire Wire Line
	6750 1900 7050 1900
Wire Wire Line
	6900 1900 6900 1850
Connection ~ 6950 1900
Connection ~ 6850 1900
Connection ~ 6900 1900
Wire Wire Line
	9900 2400 9900 1900
Connection ~ 9950 1900
Connection ~ 9900 1900
Wire Wire Line
	9750 1900 10050 1900
Connection ~ 9850 1900
NoConn ~ 9650 1900
NoConn ~ 9550 1900
NoConn ~ 9450 1900
NoConn ~ 9350 1900
$EndSCHEMATC