microbit-classroom-sensor/lts-proto.sch

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
EELAYER 25 0
EELAYER END
$Descr USLetter 11000 8500
encoding utf-8
Sheet 1 3
Title "LTS Prototype"
Date "2018-02-06"
Rev "AA"
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 9750 2400
Wire Wire Line
	9750 2400 9850 2400
Wire Wire Line
	9850 2400 9900 2400
Wire Wire Line
	9900 2400 9950 2400
Wire Wire Line
	9950 2400 10050 2400
Wire Wire Line
	10050 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 3200
Wire Wire Line
	9550 3200 9550 3300
Wire Wire Line
	9450 2400 9450 2900
Wire Wire Line
	9450 2900 9450 2950
Wire Wire Line
	8850 2400 8950 2400
Wire Wire Line
	8950 2400 9050 2400
Wire Wire Line
	9050 2400 9100 2400
Wire Wire Line
	9100 2400 9150 2400
Wire Wire Line
	9150 2400 9250 2400
Wire Wire Line
	9250 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 ~ 9650 1900
NoConn ~ 9550 1900
NoConn ~ 9450 1900
NoConn ~ 9350 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 ~ 7050 1900
NoConn ~ 6950 1900
NoConn ~ 6850 1900
NoConn ~ 6750 1900
NoConn ~ 6250 1900
Wire Wire Line
	8050 2400 8150 2400
Wire Wire Line
	8150 2400 8200 2400
Wire Wire Line
	8200 2400 8250 2400
Wire Wire Line
	8250 2400 8350 2400
Connection ~ 8250 2400
Connection ~ 8150 2400
Wire Wire Line
	8200 1900 8200 2400
Wire Wire Line
	8200 2400 8200 2700
Connection ~ 8200 2400
NoConn ~ 7850 2400
NoConn ~ 7750 2400
NoConn ~ 7650 2400
Wire Wire Line
	7150 2400 7250 2400
Wire Wire Line
	7250 2400 7300 2400
Wire Wire Line
	7300 2400 7350 2400
Wire Wire Line
	7350 2400 7450 2400
Connection ~ 7350 2400
Connection ~ 7250 2400
Wire Wire Line
	7300 1900 7300 2400
Wire Wire Line
	7300 2400 7300 2700
Connection ~ 7300 2400
NoConn ~ 7050 2400
NoConn ~ 6950 2400
NoConn ~ 6850 2400
NoConn ~ 6750 2400
Wire Wire Line
	6350 2400 6450 2400
Wire Wire Line
	6450 2400 6500 2400
Wire Wire Line
	6500 2400 6550 2400
Wire Wire Line
	6550 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 "" H 8150 2200 50  0001 C CNN
F 3 "" H 8150 2200 50  0001 C CNN
	1    8150 2200
	0    -1   -1   0   
$EndComp
Wire Wire Line
	9750 1900 9850 1900
Wire Wire Line
	9850 1900 9900 1900
Wire Wire Line
	9900 1900 9950 1900
Wire Wire Line
	9950 1900 10050 1900
Connection ~ 9950 1900
Connection ~ 9850 1900
Wire Wire Line
	8950 1900 9050 1900
Wire Wire Line
	9050 1900 9100 1900
Wire Wire Line
	9100 1900 9150 1900
Wire Wire Line
	9150 1900 9250 1900
Connection ~ 9150 1900
Connection ~ 9050 1900
Wire Wire Line
	7150 1900 7250 1900
Wire Wire Line
	7250 1900 7300 1900
Wire Wire Line
	7300 1900 7350 1900
Wire Wire Line
	7350 1900 7450 1900
Connection ~ 7350 1900
Connection ~ 7250 1900
Wire Wire Line
	6350 1900 6450 1900
Wire Wire Line
	6450 1900 6500 1900
Wire Wire Line
	6500 1900 6550 1900
Wire Wire Line
	6550 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
	9900 2400 9900 1900
Connection ~ 9900 1900
Wire Wire Line
	8050 1900 8150 1900
Wire Wire Line
	8150 1900 8200 1900
Wire Wire Line
	8200 1900 8250 1900
Wire Wire Line
	8250 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 8550 2700 1    60   ~ 0
P14
Text Label 8450 2700 1    60   ~ 0
P13
$Comp
L AP3012 U4
U 1 1 5A7BAC54
P 7150 5400
F 0 "U4" H 7350 5600 60  0000 C CNN
F 1 "AP3012" H 7150 5200 60  0000 C CNN
F 2 "" H 7050 5350 60  0001 C CNN
F 3 "" H 7050 5350 60  0001 C CNN
	1    7150 5400
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR03
U 1 1 5A7BAC55
P 7150 5900
F 0 "#PWR03" H 7150 5650 50  0001 C CNN
F 1 "GND" H 7150 5750 50  0000 C CNN
F 2 "" H 7150 5900 50  0001 C CNN
F 3 "" H 7150 5900 50  0001 C CNN
	1    7150 5900
	1    0    0    -1  
$EndComp
$Comp
L +3.3V #PWR04
U 1 1 5A7BAC56
P 7950 5000
F 0 "#PWR04" H 7950 4850 50  0001 C CNN
F 1 "+3.3V" H 7950 5140 50  0000 C CNN
F 2 "" H 7950 5000 50  0001 C CNN
F 3 "" H 7950 5000 50  0001 C CNN
	1    7950 5000
	1    0    0    -1  
$EndComp
$Comp
L L L1
U 1 1 5A7BAC57
P 7100 5050
F 0 "L1" V 7050 5050 50  0000 C CNN
F 1 "10uH" V 7175 5050 50  0000 C CNN
F 2 "" H 7100 5050 50  0001 C CNN
F 3 "" H 7100 5050 50  0001 C CNN
	1    7100 5050
	0    -1   -1   0   
$EndComp
$Comp
L C C8
U 1 1 5A7BAC58
P 7950 5700
F 0 "C8" H 7975 5800 50  0000 L CNN
F 1 "1uF" H 7975 5600 50  0000 L CNN
F 2 "" H 7988 5550 50  0001 C CNN
F 3 "" H 7950 5700 50  0001 C CNN
	1    7950 5700
	1    0    0    -1  
$EndComp
$Comp
L C C7
U 1 1 5A7BAC59
P 6050 5500
F 0 "C7" H 6075 5600 50  0000 L CNN
F 1 "1uF" H 6075 5400 50  0000 L CNN
F 2 "" H 6088 5350 50  0001 C CNN
F 3 "" H 6050 5500 50  0001 C CNN
	1    6050 5500
	1    0    0    -1  
$EndComp
$Comp
L R R5
U 1 1 5A7BAC5A
P 6400 5250
F 0 "R5" V 6480 5250 50  0000 C CNN
F 1 "30k" V 6400 5250 50  0000 C CNN
F 2 "" V 6330 5250 50  0001 C CNN
F 3 "" H 6400 5250 50  0001 C CNN
	1    6400 5250
	1    0    0    -1  
$EndComp
$Comp
L R R6
U 1 1 5A7BAC5B
P 6400 5700
F 0 "R6" V 6480 5700 50  0000 C CNN
F 1 "10k" V 6400 5700 50  0000 C CNN
F 2 "" V 6330 5700 50  0001 C CNN
F 3 "" H 6400 5700 50  0001 C CNN
	1    6400 5700
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR05
U 1 1 5A7BAC5C
P 5600 5050
F 0 "#PWR05" H 5600 4900 50  0001 C CNN
F 1 "+5V" H 5600 5190 50  0000 C CNN
F 2 "" H 5600 5050 50  0001 C CNN
F 3 "" H 5600 5050 50  0001 C CNN
	1    5600 5050
	1    0    0    -1  
$EndComp
$Comp
L D_Schottky D4
U 1 1 5A7BAC5D
P 6550 5050
F 0 "D4" H 6550 5150 50  0000 C CNN
F 1 "BAT60A" H 6550 5250 50  0000 C CNN
F 2 "" H 6550 5050 50  0001 C CNN
F 3 "" H 6550 5050 50  0001 C CNN
	1    6550 5050
	1    0    0    -1  
$EndComp
$Comp
L USB_B 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 "" H 1150 2500 50  0001 C CNN
F 3 "" H 1150 2500 50  0001 C CNN
	1    1000 2550
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR06
U 1 1 5A7BAC5F
P 1000 3050
F 0 "#PWR06" H 1000 2800 50  0001 C CNN
F 1 "GND" H 1000 2900 50  0000 C CNN
F 2 "" H 1000 3050 50  0001 C CNN
F 3 "" H 1000 3050 50  0001 C CNN
	1    1000 3050
	1    0    0    -1  
$EndComp
$Comp
L C C9
U 1 1 5A7BAC66
P 9650 1050
F 0 "C9" H 9675 1150 50  0000 L CNN
F 1 "DNP" H 9675 950 50  0000 L CNN
F 2 "" H 9688 900 50  0001 C CNN
F 3 "" H 9650 1050 50  0001 C CNN
	1    9650 1050
	1    0    0    -1  
$EndComp
$Comp
L +3.3V #PWR07
U 1 1 5A7BAC67
P 9650 900
F 0 "#PWR07" H 9650 750 50  0001 C CNN
F 1 "+3.3V" H 9650 1040 50  0000 C CNN
F 2 "" H 9650 900 50  0001 C CNN
F 3 "" H 9650 900 50  0001 C CNN
	1    9650 900 
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR08
U 1 1 5A7BAC68
P 9650 1200
F 0 "#PWR08" H 9650 950 50  0001 C CNN
F 1 "GND" H 9650 1050 50  0000 C CNN
F 2 "" H 9650 1200 50  0001 C CNN
F 3 "" H 9650 1200 50  0001 C CNN
	1    9650 1200
	1    0    0    -1  
$EndComp
$Comp
L +3.3V #PWR09
U 1 1 5A7BAC69
P 2800 1300
F 0 "#PWR09" H 2800 1150 50  0001 C CNN
F 1 "+3.3V" H 2800 1440 50  0000 C CNN
F 2 "" H 2800 1300 50  0001 C CNN
F 3 "" H 2800 1300 50  0001 C CNN
	1    2800 1300
	1    0    0    -1  
$EndComp
$Comp
L ESDR0502N U1
U 1 1 5A7BAC6A
P 2200 3200
F 0 "U1" H 2500 3400 60  0000 C CNN
F 1 "ESDR0502N" H 2350 3000 60  0000 C CNN
F 2 "" H 2200 3200 60  0001 C CNN
F 3 "" H 2200 3200 60  0001 C CNN
	1    2200 3200
	1    0    0    -1  
$EndComp
Wire Wire Line
	7250 5050 7950 5050
Wire Wire Line
	7950 5050 8900 5050
Wire Wire Line
	6700 5050 6700 5300
Wire Wire Line
	6700 5050 6950 5050
Connection ~ 6700 5050
Wire Wire Line
	6700 5500 6400 5500
Wire Wire Line
	5150 5050 5200 5050
Wire Wire Line
	5200 5050 5600 5050
Wire Wire Line
	5600 5050 6050 5050
Wire Wire Line
	6050 5050 6400 5050
Wire Wire Line
	6050 5650 6050 5900
Wire Wire Line
	6050 5900 6400 5900
Wire Wire Line
	6400 5900 6600 5900
Wire Wire Line
	6600 5900 7150 5900
Wire Wire Line
	7150 5900 7950 5900
Connection ~ 6400 5900
Wire Wire Line
	7950 5000 7950 5050
Wire Wire Line
	7950 5050 7950 5300
Wire Wire Line
	7950 5300 7950 5550
Wire Wire Line
	7600 5300 7950 5300
Connection ~ 7950 5300
Connection ~ 7950 5050
Wire Wire Line
	6400 5400 6400 5500
Wire Wire Line
	6400 5500 6400 5550
Connection ~ 6400 5500
Wire Wire Line
	6400 5050 6400 5100
Wire Wire Line
	6700 5400 6600 5400
Wire Wire Line
	6600 5400 6600 5900
Connection ~ 6600 5900
Wire Wire Line
	1000 2950 1000 3050
Wire Wire Line
	900  2950 1000 2950
Wire Wire Line
	1300 2650 2250 2650
Wire Wire Line
	2250 2650 3200 2650
Wire Wire Line
	1300 2550 2150 2550
Wire Wire Line
	2150 2550 3200 2550
Wire Wire Line
	1300 2350 1550 2350
Wire Wire Line
	1550 2350 2050 2350
Wire Wire Line
	2050 2350 2500 2350
Wire Wire Line
	2500 2350 2500 2150
Wire Wire Line
	2500 2150 3050 2150
Wire Wire Line
	3050 2150 3200 2150
Wire Wire Line
	3050 2150 3050 2050
Wire Wire Line
	3050 2050 3200 2050
Connection ~ 3050 2150
Wire Wire Line
	2050 2850 2050 2350
Connection ~ 2050 2350
Wire Wire Line
	2150 2850 2150 2550
Connection ~ 2150 2550
Wire Wire Line
	2250 2850 2250 2650
Connection ~ 2250 2650
$Comp
L GND #PWR010
U 1 1 5A7BAC6B
P 1700 3400
F 0 "#PWR010" H 1700 3150 50  0001 C CNN
F 1 "GND" H 1700 3250 50  0000 C CNN
F 2 "" H 1700 3400 50  0001 C CNN
F 3 "" H 1700 3400 50  0001 C CNN
	1    1700 3400
	1    0    0    -1  
$EndComp
Connection ~ 1550 2350
Text Notes 9300 1450 0    30   ~ 0
Bulk Capacitance if Micro:bit powered
$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 "" 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 #PWR011
U 1 1 5A7BAC6E
P 3750 7100
F 0 "#PWR011" 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 2350
F 0 "R1" V 3130 2350 50  0000 C CNN
F 1 "1k" V 3050 2350 50  0000 C CNN
F 2 "" V 2980 2350 50  0001 C CNN
F 3 "" H 3050 2350 50  0001 C CNN
	1    3050 2350
	0    1    1    0   
$EndComp
$Comp
L VBUS #PWR012
U 1 1 5A7BAC70
P 3800 1050
F 0 "#PWR012" H 3800 900 50  0001 C CNN
F 1 "VBUS" H 3800 1200 50  0000 C CNN
F 2 "" H 3800 1050 50  0001 C CNN
F 3 "" H 3800 1050 50  0001 C CNN
	1    3800 1050
	1    0    0    -1  
$EndComp
$Comp
L C C1
U 1 1 5A7BAC71
P 3650 1250
F 0 "C1" H 3550 1350 50  0000 L CNN
F 1 "4.7uF" H 3400 1150 50  0000 L CNN
F 2 "" H 3688 1100 50  0001 C CNN
F 3 "" H 3650 1250 50  0001 C CNN
	1    3650 1250
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 5A7BAC72
P 3950 1250
F 0 "C2" H 3975 1350 50  0000 L CNN
F 1 "0.1uF" H 3975 1150 50  0000 L CNN
F 2 "" H 3988 1100 50  0001 C CNN
F 3 "" H 3950 1250 50  0001 C CNN
	1    3950 1250
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR013
U 1 1 5A7BAC73
P 3800 1450
F 0 "#PWR013" H 3800 1200 50  0001 C CNN
F 1 "GND" H 3800 1300 50  0000 C CNN
F 2 "" H 3800 1450 50  0001 C CNN
F 3 "" H 3800 1450 50  0001 C CNN
	1    3800 1450
	1    0    0    -1  
$EndComp
Wire Wire Line
	3650 1100 3800 1100
Wire Wire Line
	3800 1100 3950 1100
Wire Wire Line
	3800 1100 3800 1050
Connection ~ 3800 1100
Wire Wire Line
	3800 1450 3800 1400
Wire Wire Line
	3650 1400 3800 1400
Wire Wire Line
	3800 1400 3950 1400
Connection ~ 3800 1400
$Comp
L C C4
U 1 1 5A7BAC74
P 4550 1250
F 0 "C4" H 4450 1350 50  0000 L CNN
F 1 "4.7uF" H 4300 1150 50  0000 L CNN
F 2 "" H 4588 1100 50  0001 C CNN
F 3 "" H 4550 1250 50  0001 C CNN
	1    4550 1250
	1    0    0    -1  
$EndComp
$Comp
L C C5
U 1 1 5A7BAC75
P 4850 1250
F 0 "C5" H 4875 1350 50  0000 L CNN
F 1 "0.1uF" H 4875 1150 50  0000 L CNN
F 2 "" H 4888 1100 50  0001 C CNN
F 3 "" H 4850 1250 50  0001 C CNN
	1    4850 1250
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR014
U 1 1 5A7BAC76
P 4700 1450
F 0 "#PWR014" H 4700 1200 50  0001 C CNN
F 1 "GND" H 4700 1300 50  0000 C CNN
F 2 "" H 4700 1450 50  0001 C CNN
F 3 "" H 4700 1450 50  0001 C CNN
	1    4700 1450
	1    0    0    -1  
$EndComp
Wire Wire Line
	4550 1100 4700 1100
Wire Wire Line
	4700 1100 4850 1100
Wire Wire Line
	4700 1100 4700 1050
Connection ~ 4700 1100
Wire Wire Line
	4700 1450 4700 1400
Wire Wire Line
	4550 1400 4700 1400
Wire Wire Line
	4700 1400 4850 1400
Connection ~ 4700 1400
$Comp
L +3.3V #PWR015
U 1 1 5A7BAC77
P 4700 1050
F 0 "#PWR015" H 4700 900 50  0001 C CNN
F 1 "+3.3V" H 4700 1190 50  0000 C CNN
F 2 "" H 4700 1050 50  0001 C CNN
F 3 "" H 4700 1050 50  0001 C CNN
	1    4700 1050
	1    0    0    -1  
$EndComp
$Comp
L CP2102N U2
U 1 1 5A7BAC78
P 3950 2650
F 0 "U2" H 3950 3450 60  0000 C CNN
F 1 "CP2102N" H 4400 1800 60  0000 C CNN
F 2 "" H 3950 2650 60  0001 C CNN
F 3 "./doc/cp2102n-datasheet.pdf" H 3950 2650 60  0001 C CNN
	1    3950 2650
	1    0    0    -1  
$EndComp
Wire Wire Line
	7600 5500 8900 5500
Wire Wire Line
	6400 5900 6400 5850
Wire Wire Line
	7950 5900 7950 5850
Connection ~ 7150 5900
$Comp
L Q_NPN_BCE Q1
U 1 1 5A7BF0F3
P 9000 5750
F 0 "Q1" H 9200 5800 50  0000 L CNN
F 1 "Q_NPN_BCE" H 9200 5700 50  0000 L CNN
F 2 "" H 9200 5850 50  0001 C CNN
F 3 "" H 9000 5750 50  0001 C CNN
	1    9000 5750
	-1   0    0    -1  
$EndComp
$Comp
L R R7
U 1 1 5A7BF247
P 8900 5300
F 0 "R7" V 8980 5300 50  0000 C CNN
F 1 "10k" V 8900 5300 50  0000 C CNN
F 2 "" V 8830 5300 50  0001 C CNN
F 3 "" H 8900 5300 50  0001 C CNN
	1    8900 5300
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR016
U 1 1 5A7BF347
P 8900 5950
F 0 "#PWR016" H 8900 5700 50  0001 C CNN
F 1 "GND" H 8900 5800 50  0000 C CNN
F 2 "" H 8900 5950 50  0001 C CNN
F 3 "" H 8900 5950 50  0001 C CNN
	1    8900 5950
	1    0    0    -1  
$EndComp
Wire Wire Line
	8900 5050 8900 5150
Wire Wire Line
	8900 5450 8900 5500
Wire Wire Line
	8900 5500 8900 5550
Connection ~ 8900 5500
$Comp
L R R8
U 1 1 5A7BF753
P 9350 5750
F 0 "R8" V 9430 5750 50  0000 C CNN
F 1 "2k" V 9350 5750 50  0000 C CNN
F 2 "" V 9280 5750 50  0001 C CNN
F 3 "" H 9350 5750 50  0001 C CNN
	1    9350 5750
	0    1    1    0   
$EndComp
$Comp
L VBUS #PWR017
U 1 1 5A7BF7E2
P 9550 5750
F 0 "#PWR017" H 9550 5600 50  0001 C CNN
F 1 "VBUS" H 9550 5900 50  0000 C CNN
F 2 "" H 9550 5750 50  0001 C CNN
F 3 "" H 9550 5750 50  0001 C CNN
	1    9550 5750
	1    0    0    -1  
$EndComp
Wire Wire Line
	9500 5750 9550 5750
Wire Notes Line
	8300 4950 8300 6300
Wire Notes Line
	8300 6300 9750 6300
Wire Notes Line
	9750 6300 9750 4950
Wire Notes Line
	9750 4950 8300 4950
Text Notes 8400 6250 0    40   ~ 0
Disable boost supply on external power
Wire Notes Line
	5800 4700 8150 4700
Wire Notes Line
	8150 4700 8150 6150
Wire Notes Line
	8150 6150 5800 6150
Wire Notes Line
	5800 6150 5800 4700
Text Notes 5850 4800 0    40   ~ 0
Boost Supply (5V @ 72mA; limited by Micro:bit)
Wire Wire Line
	8450 2400 8450 2700
Wire Wire Line
	8550 2400 8550 2700
Wire Wire Line
	8650 2400 8650 2700
Wire Wire Line
	8750 2400 8750 2700
$Sheet
S 650  5700 950  900 
U 5A7C7D4B
F0 "LCD" 60
F1 "lcd.sch" 60
$EndSheet
$Comp
L MAX40200 U3
U 1 1 5A7CB4BE
P 4850 5200
F 0 "U3" H 5000 5000 30  0000 C CNN
F 1 "MAX40200" H 4850 5475 30  0000 C CNN
F 2 "" H 4850 5200 30  0001 C CNN
F 3 "" H 4850 5200 30  0001 C CNN
	1    4850 5200
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR018
U 1 1 5A7CBBC1
P 4850 5600
F 0 "#PWR018" H 4850 5350 50  0001 C CNN
F 1 "GND" H 4850 5450 50  0000 C CNN
F 2 "" H 4850 5600 50  0001 C CNN
F 3 "" H 4850 5600 50  0001 C CNN
	1    4850 5600
	1    0    0    -1  
$EndComp
Wire Wire Line
	4750 2200 4950 2200
Wire Wire Line
	4750 2300 4950 2300
$Comp
L LED D3
U 1 1 5A7CDDD0
P 5550 3000
F 0 "D3" H 5550 3100 50  0000 C CNN
F 1 "DNP" H 5550 2900 50  0000 C CNN
F 2 "" H 5550 3000 50  0001 C CNN
F 3 "" H 5550 3000 50  0001 C CNN
	1    5550 3000
	0    -1   -1   0   
$EndComp
$Comp
L LED D2
U 1 1 5A7CDEAB
P 5250 3000
F 0 "D2" H 5250 3100 50  0000 C CNN
F 1 "DNP" H 5250 2900 50  0000 C CNN
F 2 "" H 5250 3000 50  0001 C CNN
F 3 "" H 5250 3000 50  0001 C CNN
	1    5250 3000
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4750 2700 5550 2700
Wire Wire Line
	5550 2700 5550 2850
Wire Wire Line
	5250 2850 5250 2800
Wire Wire Line
	5250 2800 4750 2800
$Comp
L R R4
U 1 1 5A7CE2CD
P 5550 3400
F 0 "R4" V 5630 3400 50  0000 C CNN
F 1 "DNP" V 5550 3400 50  0000 C CNN
F 2 "" V 5480 3400 50  0001 C CNN
F 3 "" H 5550 3400 50  0001 C CNN
	1    5550 3400
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 5A7CE36E
P 5250 3400
F 0 "R3" V 5330 3400 50  0000 C CNN
F 1 "DNP" V 5250 3400 50  0000 C CNN
F 2 "" V 5180 3400 50  0001 C CNN
F 3 "" H 5250 3400 50  0001 C CNN
	1    5250 3400
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR019
U 1 1 5A7CE3E2
P 5400 3650
F 0 "#PWR019" H 5400 3400 50  0001 C CNN
F 1 "GND" H 5400 3500 50  0000 C CNN
F 2 "" H 5400 3650 50  0001 C CNN
F 3 "" H 5400 3650 50  0001 C CNN
	1    5400 3650
	1    0    0    -1  
$EndComp
Wire Wire Line
	5250 3150 5250 3250
Wire Wire Line
	5550 3150 5550 3250
Wire Wire Line
	5250 3550 5400 3550
Wire Wire Line
	5400 3550 5550 3550
Wire Wire Line
	5400 3550 5400 3650
Connection ~ 5400 3550
NoConn ~ 4750 2500
NoConn ~ 4750 2600
NoConn ~ 4750 3050
NoConn ~ 4750 3150
NoConn ~ 4750 3250
NoConn ~ 4750 1950
NoConn ~ 4750 2050
Wire Wire Line
	3700 3650 3800 3650
Wire Wire Line
	3800 3650 3900 3650
Connection ~ 3800 3650
Wire Wire Line
	3800 3650 3800 3700
$Comp
L GND #PWR020
U 1 1 5A7CF61E
P 3800 3700
F 0 "#PWR020" H 3800 3450 50  0001 C CNN
F 1 "GND" H 3800 3550 50  0000 C CNN
F 2 "" H 3800 3700 50  0001 C CNN
F 3 "" H 3800 3700 50  0001 C CNN
	1    3800 3700
	1    0    0    -1  
$EndComp
$Comp
L D_Schottky D1
U 1 1 5A7CF6D6
P 2900 1700
F 0 "D1" H 2900 1800 50  0000 C CNN
F 1 "BAT60A" H 2900 1600 50  0000 C CNN
F 2 "" H 2900 1700 50  0001 C CNN
F 3 "" H 2900 1700 50  0001 C CNN
	1    2900 1700
	0    1    1    0   
$EndComp
Wire Wire Line
	2900 1850 2900 1950
Wire Wire Line
	2900 1950 2900 2350
Wire Wire Line
	3200 1950 2900 1950
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 1900 3550 0    30   ~ 0
Surge / Transient Protection
Text Notes 4500 5900 0    30   Italic 0
Ideal diode to block to isolate VBUS\nfrom Boost Supply 5V
Wire Notes Line
	1550 2850 2700 2850
Wire Notes Line
	2700 2850 2700 3650
Wire Notes Line
	2700 3650 1550 3650
Wire Notes Line
	1550 3650 1550 2850
Text GLabel 8750 2700 3    45   Input ~ 0
COMPUTER_TXO
Text GLabel 8650 2700 3    45   Input ~ 0
COMPUTER_RXI
Text GLabel 4950 2200 2    45   Input ~ 0
COMPUTER_RXI
Text GLabel 4950 2300 2    45   Input ~ 0
COMPUTER_TXO
Text GLabel 9550 3300 3    45   Input ~ 0
SDA
Text GLabel 9450 2950 3    45   Input ~ 0
SCL
Text GLabel 8550 2700 3    45   Input ~ 0
nCCS811
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 "" V 9880 2900 50  0001 C CNN
F 3 "" H 9950 2900 50  0001 C CNN
	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 "" 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 3000
Wire Wire Line
	10100 3000 10100 3200
$Comp
L +3.3V #PWR021
U 1 1 5A7DFD12
P 10300 2950
F 0 "#PWR021" 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 #FLG022
U 1 1 5A7EC327
P 2900 1300
F 0 "#FLG022" H 2900 1375 50  0001 C CNN
F 1 "PWR_FLAG" H 2900 1450 50  0000 C CNN
F 2 "" H 2900 1300 50  0001 C CNN
F 3 "" H 2900 1300 50  0001 C CNN
	1    2900 1300
	0    1    1    0   
$EndComp
Wire Wire Line
	2900 1550 2900 1300
Wire Wire Line
	2900 1300 2800 1300
Text Notes 5850 6150 0    45   ~ 0
Sufficient for LCD w/o backlight and *perhaps* CO2 sensor
Text Notes 2750 1100 0    45   Italic 0
95mA
Wire Wire Line
	9800 3200 9550 3200
Wire Wire Line
	9800 2900 9450 2900
$Comp
L TEST_1P J11
U 1 1 5A7DD9C9
P 3500 7100
F 0 "J11" H 3500 7370 50  0000 C CNN
F 1 "SDA" H 3500 7300 50  0000 C CNN
F 2 "" H 3700 7100 50  0001 C CNN
F 3 "" H 3700 7100 50  0001 C CNN
	1    3500 7100
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J10
U 1 1 5A7DDA9A
P 3250 7100
F 0 "J10" H 3250 7370 50  0000 C CNN
F 1 "SCL" H 3250 7300 50  0000 C CNN
F 2 "" H 3450 7100 50  0001 C CNN
F 3 "" H 3450 7100 50  0001 C CNN
	1    3250 7100
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J15
U 1 1 5A7DDB1E
P 4500 7100
F 0 "J15" H 4500 7370 50  0000 C CNN
F 1 "PWM" H 4500 7300 50  0000 C CNN
F 2 "" H 4700 7100 50  0001 C CNN
F 3 "" H 4700 7100 50  0001 C CNN
	1    4500 7100
	1    0    0    -1  
$EndComp
$Comp
L TEST_1P J16
U 1 1 5A7DDBA5
P 4750 7100
F 0 "J16" H 4750 7370 50  0000 C CNN
F 1 "VOC" H 4750 7300 50  0000 C CNN
F 2 "" H 4950 7100 50  0001 C CNN
F 3 "" H 4950 7100 50  0001 C CNN
	1    4750 7100
	1    0    0    -1  
$EndComp
Text GLabel 4250 7100 3    45   Input ~ 0
COMPUTER_RXI
Text GLabel 4000 7100 3    45   Input ~ 0
COMPUTER_TXO
Text GLabel 3250 7100 3    45   Input ~ 0
SCL
Text GLabel 3500 7100 3    45   Input ~ 0
SDA
Text GLabel 4500 7100 3    45   Input ~ 0
CO2_SENSOR
Text GLabel 4750 7100 3    45   Input ~ 0
nCCS811
Wire Wire Line
	1550 2350 1550 2200
$Comp
L VBUS #PWR023
U 1 1 5A7DE3D0
P 1550 2200
F 0 "#PWR023" 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
Connection ~ 5600 5050
Wire Wire Line
	6050 5350 6050 5050
Connection ~ 6050 5050
$Comp
L R R2
U 1 1 5A7DF551
P 4400 5400
F 0 "R2" V 4480 5400 50  0000 C CNN
F 1 "DNP" V 4400 5400 50  0000 C CNN
F 2 "" V 4330 5400 50  0001 C CNN
F 3 "" H 4400 5400 50  0001 C CNN
	1    4400 5400
	1    0    0    -1  
$EndComp
Wire Wire Line
	4150 5600 4400 5600
Wire Wire Line
	4400 5600 4850 5600
Wire Wire Line
	4850 5600 5200 5600
Wire Wire Line
	4850 5600 4850 5550
$Comp
L VBUS #PWR024
U 1 1 5A7DFE67
P 4400 4950
F 0 "#PWR024" H 4400 4800 50  0001 C CNN
F 1 "VBUS" H 4400 5100 50  0000 C CNN
F 2 "" H 4400 4950 50  0001 C CNN
F 3 "" H 4400 4950 50  0001 C CNN
	1    4400 4950
	1    0    0    -1  
$EndComp
Wire Wire Line
	4400 4950 4400 5050
Wire Wire Line
	4400 5050 4400 5250
Connection ~ 4400 5250
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 "" 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 "" H 4200 7100 50  0001 C CNN
F 3 "" H 4200 7100 50  0001 C CNN
	1    4000 7100
	1    0    0    -1  
$EndComp
Wire Wire Line
	5200 5150 5200 5050
Connection ~ 5200 5050
Connection ~ 4850 5600
$Comp
L C C6
U 1 1 5A7E4346
P 5200 5300
F 0 "C6" H 5225 5400 50  0000 L CNN
F 1 "1uf" H 5225 5200 50  0000 L CNN
F 2 "" H 5238 5150 50  0001 C CNN
F 3 "" H 5200 5300 50  0001 C CNN
	1    5200 5300
	1    0    0    -1  
$EndComp
Wire Wire Line
	4150 5050 4400 5050
Wire Wire Line
	4400 5050 4550 5050
Connection ~ 4400 5050
$Comp
L C C3
U 1 1 5A7E4A9D
P 4150 5300
F 0 "C3" H 4175 5400 50  0000 L CNN
F 1 "1uf" H 4175 5200 50  0000 L CNN
F 2 "" H 4188 5150 50  0001 C CNN
F 3 "" H 4150 5300 50  0001 C CNN
	1    4150 5300
	1    0    0    -1  
$EndComp
Wire Wire Line
	5200 5600 5200 5450
Wire Wire Line
	4400 5600 4400 5550
Wire Wire Line
	4150 5600 4150 5450
Connection ~ 4400 5600
Wire Wire Line
	4150 5150 4150 5050
Wire Wire Line
	4400 5250 4550 5250
$Comp
L Speaker_Ultrasound LS1
U 1 1 5A7EA06A
P 6950 3750
F 0 "LS1" H 6975 3975 50  0000 R CNN
F 1 "Piezo Speaker" H 6950 3550 50  0000 R CNN
F 2 "" H 6915 3700 50  0001 C CNN
F 3 "" H 6915 3700 50  0001 C CNN
	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 2400
Wire Wire Line
	6500 2400 6500 2700
Text GLabel 6500 2700 3    30   Input ~ 0
BUZZER
Text GLabel 7150 3650 2    30   Input ~ 0
BUZZER
$Comp
L GND #PWR025
U 1 1 5A7EBE65
P 7300 3750
F 0 "#PWR025" 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
	7850 3350 6450 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
	7850 3350 7850 4150
Wire Notes Line
	7850 4150 6450 4150
Wire Notes Line
	6450 4150 6450 3350
$Comp
L Conn_01x04 J2
U 1 1 5A7ECDE4
P 2300 4950
F 0 "J2" H 2300 5150 50  0000 C CNN
F 1 "I2C_3V" H 2300 4650 50  0000 C CNN
F 2 "" H 2300 4950 50  0001 C CNN
F 3 "" H 2300 4950 50  0001 C CNN
	1    2300 4950
	-1   0    0    1   
$EndComp
$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 "" 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 "" 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 "" 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 "" 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 5750
F 0 "J3" H 2350 5950 50  0000 C CNN
F 1 "I2C_5V" H 2350 5450 50  0000 C CNN
F 2 "" H 2350 5750 50  0001 C CNN
F 3 "" H 2350 5750 50  0001 C CNN
	1    2350 5750
	-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 "" H 3050 5750 50  0001 C CNN
F 3 "" H 3050 5750 50  0001 C CNN
	1    3050 5750
	-1   0    0    1   
$EndComp
$Comp
L Conn_01x01 J9
U 1 1 5A7EDBCA
P 3050 6050
F 0 "J9" H 3050 6150 50  0000 C CNN
F 1 "5V" H 3050 5950 50  0000 C CNN
F 2 "" H 3050 6050 50  0001 C CNN
F 3 "" H 3050 6050 50  0001 C CNN
	1    3050 6050
	-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
P01
Text Label 3400 4950 0    60   ~ 0
P02
Text Label 3400 5200 0    60   ~ 0
P08
$Comp
L GND #PWR026
U 1 1 5A7EEBFF
P 3250 5500
F 0 "#PWR026" 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 #PWR027
U 1 1 5A7EEC77
P 3250 5750
F 0 "#PWR027" 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 +5V #PWR028
U 1 1 5A7EECEF
P 3250 6050
F 0 "#PWR028" H 3250 5900 50  0001 C CNN
F 1 "+5V" H 3250 6190 50  0000 C CNN
F 2 "" H 3250 6050 50  0001 C CNN
F 3 "" H 3250 6050 50  0001 C CNN
	1    3250 6050
	0    1    1    0   
$EndComp
$Comp
L GND #PWR029
U 1 1 5A7EF224
P 2600 4750
F 0 "#PWR029" H 2600 4500 50  0001 C CNN
F 1 "GND" H 2600 4600 50  0000 C CNN
F 2 "" H 2600 4750 50  0001 C CNN
F 3 "" H 2600 4750 50  0001 C CNN
	1    2600 4750
	-1   0    0    1   
$EndComp
Text GLabel 2500 4850 2    45   Input ~ 0
SCL
Text GLabel 2500 4950 2    45   Input ~ 0
SDA
Wire Wire Line
	2500 4750 2600 4750
Wire Wire Line
	2550 5550 2650 5550
$Comp
L GND #PWR030
U 1 1 5A7EFE7A
P 2650 5550
F 0 "#PWR030" H 2650 5300 50  0001 C CNN
F 1 "GND" H 2650 5400 50  0000 C CNN
F 2 "" H 2650 5550 50  0001 C CNN
F 3 "" H 2650 5550 50  0001 C CNN
	1    2650 5550
	-1   0    0    1   
$EndComp
Text GLabel 2550 5650 2    45   Input ~ 0
SCL
Text GLabel 2550 5750 2    45   Input ~ 0
SDA
$Comp
L +5V #PWR031
U 1 1 5A7F0111
P 2650 5850
F 0 "#PWR031" H 2650 5700 50  0001 C CNN
F 1 "+5V" H 2650 5990 50  0000 C CNN
F 2 "" H 2650 5850 50  0001 C CNN
F 3 "" H 2650 5850 50  0001 C CNN
	1    2650 5850
	-1   0    0    1   
$EndComp
$Comp
L +3.3V #PWR032
U 1 1 5A7F0229
P 2600 5050
F 0 "#PWR032" H 2600 4900 50  0001 C CNN
F 1 "+3.3V" H 2600 5190 50  0000 C CNN
F 2 "" H 2600 5050 50  0001 C CNN
F 3 "" H 2600 5050 50  0001 C CNN
	1    2600 5050
	-1   0    0    1   
$EndComp
Wire Wire Line
	2500 5050 2600 5050
Wire Wire Line
	2550 5850 2650 5850
Text Notes 2150 4450 0    60   ~ 0
User Expansion
Wire Notes Line
	2100 4350 3700 4350
Wire Notes Line
	3700 4350 3700 6300
Wire Notes Line
	3700 6300 2100 6300
Wire Notes Line
	2100 6300 2100 4350
$Comp
L TEST_1P J17
U 1 1 5A7F143B
P 5000 7100
F 0 "J17" H 5000 7370 50  0000 C CNN
F 1 "BUZZER" H 5000 7300 50  0000 C CNN
F 2 "" H 5200 7100 50  0001 C CNN
F 3 "" H 5200 7100 50  0001 C CNN
	1    5000 7100
	1    0    0    -1  
$EndComp
Text GLabel 5000 7100 3    45   Input ~ 0
BUZZER
$EndSCHEMATC