smart-home/weather_station_sensor.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Sensor:BME280 U5
U 1 1 5E581272
P 9800 5450
F 0 "U5" H 9370 5404 50  0000 R CNN
F 1 "BME280" H 9370 5495 50  0000 R CNN
F 2 "Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering" H 11300 5000 50  0001 C CNN
F 3 "https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280-DS002.pdf" H 9800 5250 50  0001 C CNN
	1    9800 5450
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR014
U 1 1 5E5840E4
P 9700 6200
F 0 "#PWR014" H 9700 5950 50  0001 C CNN
F 1 "GND" H 9705 6027 50  0000 C CNN
F 2 "" H 9700 6200 50  0001 C CNN
F 3 "" H 9700 6200 50  0001 C CNN
	1    9700 6200
	1    0    0    -1  
$EndComp
Wire Wire Line
	9700 6050 9700 6100
Wire Wire Line
	9900 6050 9900 6100
Wire Wire Line
	9900 6100 9700 6100
Connection ~ 9700 6100
Wire Wire Line
	9700 6100 9700 6200
$Comp
L Device:C C5
U 1 1 5E5847B0
P 9050 4900
F 0 "C5" H 9165 4946 50  0000 L CNN
F 1 "100 nF" H 9165 4855 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 9088 4750 50  0001 C CNN
F 3 "~" H 9050 4900 50  0001 C CNN
	1    9050 4900
	1    0    0    -1  
$EndComp
Wire Wire Line
	9700 4750 9700 4850
Wire Wire Line
	9900 4850 9900 4750
Wire Wire Line
	9900 4750 9700 4750
$Comp
L power:GND #PWR012
U 1 1 5E584F8B
P 9050 5150
F 0 "#PWR012" H 9050 4900 50  0001 C CNN
F 1 "GND" H 9055 4977 50  0000 C CNN
F 2 "" H 9050 5150 50  0001 C CNN
F 3 "" H 9050 5150 50  0001 C CNN
	1    9050 5150
	1    0    0    -1  
$EndComp
Wire Wire Line
	9050 5150 9050 5100
Wire Wire Line
	9700 4750 9050 4750
Connection ~ 9700 4750
$Comp
L power:VCC #PWR013
U 1 1 5E587A3C
P 9700 4650
F 0 "#PWR013" H 9700 4500 50  0001 C CNN
F 1 "VCC" H 9717 4823 50  0000 C CNN
F 2 "" H 9700 4650 50  0001 C CNN
F 3 "" H 9700 4650 50  0001 C CNN
	1    9700 4650
	1    0    0    -1  
$EndComp
Wire Wire Line
	9700 4650 9700 4750
$Comp
L Device:C C6
U 1 1 5E588ABC
P 10400 2150
F 0 "C6" H 10515 2196 50  0000 L CNN
F 1 "100n" H 10515 2105 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 10438 2000 50  0001 C CNN
F 3 "~" H 10400 2150 50  0001 C CNN
	1    10400 2150
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR017
U 1 1 5E588AC2
P 10400 2400
F 0 "#PWR017" H 10400 2150 50  0001 C CNN
F 1 "GND" H 10405 2227 50  0000 C CNN
F 2 "" H 10400 2400 50  0001 C CNN
F 3 "" H 10400 2400 50  0001 C CNN
	1    10400 2400
	1    0    0    -1  
$EndComp
Wire Wire Line
	10400 2400 10400 2300
Wire Wire Line
	9750 2000 10400 2000
$Comp
L power:VCC #PWR015
U 1 1 5E58967F
P 9750 1900
F 0 "#PWR015" H 9750 1750 50  0001 C CNN
F 1 "VCC" H 9767 2073 50  0000 C CNN
F 2 "" H 9750 1900 50  0001 C CNN
F 3 "" H 9750 1900 50  0001 C CNN
	1    9750 1900
	1    0    0    -1  
$EndComp
Wire Wire Line
	9750 1900 9750 2000
Wire Wire Line
	9750 2000 9750 2050
Connection ~ 9750 2000
Text GLabel 9150 2450 0    50   Input ~ 0
MISO
Text GLabel 9150 2550 0    50   Input ~ 0
SCK
Text GLabel 9150 2650 0    50   Input ~ 0
NRF24_CS
Wire Wire Line
	9150 2350 9250 2350
Wire Wire Line
	9250 2450 9150 2450
Wire Wire Line
	9150 2550 9250 2550
Wire Wire Line
	9250 2650 9150 2650
Wire Wire Line
	10500 5150 10400 5150
Wire Wire Line
	10400 5350 10500 5350
Wire Wire Line
	10500 5550 10400 5550
Wire Wire Line
	10400 5750 10500 5750
$Comp
L power:GND #PWR016
U 1 1 5E595499
P 9750 3350
F 0 "#PWR016" H 9750 3100 50  0001 C CNN
F 1 "GND" H 9755 3177 50  0000 C CNN
F 2 "" H 9750 3350 50  0001 C CNN
F 3 "" H 9750 3350 50  0001 C CNN
	1    9750 3350
	1    0    0    -1  
$EndComp
Wire Wire Line
	9750 3250 9750 3350
Text GLabel 7850 2900 2    50   Input ~ 0
MISO
Text GLabel 7850 2600 2    50   Input ~ 0
MOSI
Text GLabel 7850 3200 2    50   Input ~ 0
SCK
Text GLabel 6150 4800 2    50   Input ~ 0
NRF24_CS
Text GLabel 6150 2700 2    50   Input ~ 0
BME280_CS
Text GLabel 6150 4900 2    50   Input ~ 0
CE
Text GLabel 9150 2850 0    50   Input ~ 0
CE
Wire Wire Line
	9150 2850 9250 2850
$Comp
L Device:C C4
U 1 1 5E5A4C2E
P 8500 4900
F 0 "C4" H 8615 4946 50  0000 L CNN
F 1 "100 nF" H 8615 4855 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 8538 4750 50  0001 C CNN
F 3 "~" H 8500 4900 50  0001 C CNN
	1    8500 4900
	1    0    0    -1  
$EndComp
Wire Wire Line
	9050 4750 8500 4750
Connection ~ 9050 4750
Text GLabel 9150 2350 0    50   Input ~ 0
MOSI
Text GLabel 10500 5350 2    50   Input ~ 0
SCK
Text GLabel 10500 5150 2    50   Input ~ 0
MISO
Text GLabel 10500 5550 2    50   Input ~ 0
MOSI
Text GLabel 10500 5750 2    50   Input ~ 0
BME280_CS
$Comp
L Device:D_Zener D1
U 1 1 5E5B4A6A
P 2750 7050
F 0 "D1" V 2704 7129 50  0000 L CNN
F 1 "ESD3Z12" V 2795 7129 50  0000 L CNN
F 2 "" H 2750 7050 50  0001 C CNN
F 3 "~" H 2750 7050 50  0001 C CNN
	1    2750 7050
	0    1    1    0   
$EndComp
Wire Wire Line
	2950 6800 2750 6800
Wire Wire Line
	2750 6800 2750 6900
Connection ~ 2750 6800
Wire Wire Line
	2750 6800 2500 6800
$Comp
L Device:Battery_Cell BT1
U 1 1 5E5BF5B4
P 700 6450
F 0 "BT1" H 818 6546 50  0000 L CNN
F 1 "AAA battery" H 818 6455 50  0000 L CNN
F 2 "Battery_Holder_AAA_Keystone:aaa_holder_keystone_591+597" V 700 6510 50  0001 C CNN
F 3 "~" V 700 6510 50  0001 C CNN
	1    700  6450
	1    0    0    -1  
$EndComp
$Comp
L Device:Battery_Cell BT2
U 1 1 5E5C0221
P 700 6850
F 0 "BT2" H 818 6946 50  0000 L CNN
F 1 "AAA battery" H 818 6855 50  0000 L CNN
F 2 "Battery_Holder_AAA_Keystone:aaa_holder_keystone_591+597" V 700 6910 50  0001 C CNN
F 3 "~" V 700 6910 50  0001 C CNN
	1    700  6850
	1    0    0    -1  
$EndComp
Wire Wire Line
	700  6650 700  6550
Wire Wire Line
	700  6250 700  6100
Wire Wire Line
	700  6100 850  6100
Wire Wire Line
	2150 6100 2150 6500
Wire Wire Line
	700  7450 850  7450
Wire Wire Line
	2150 7450 2150 7100
Wire Wire Line
	2150 7450 2750 7450
Wire Wire Line
	2750 7450 2750 7200
Connection ~ 2150 7450
Wire Wire Line
	2750 7450 3250 7450
Wire Wire Line
	3250 7450 3250 7000
Connection ~ 2750 7450
Wire Wire Line
	3250 6600 3250 6500
$Comp
L power:VCC #PWR06
U 1 1 5E5DC9B3
P 3800 6050
F 0 "#PWR06" H 3800 5900 50  0001 C CNN
F 1 "VCC" H 3817 6223 50  0000 C CNN
F 2 "" H 3800 6050 50  0001 C CNN
F 3 "" H 3800 6050 50  0001 C CNN
	1    3800 6050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR07
U 1 1 5E5DD008
P 3800 6500
F 0 "#PWR07" H 3800 6250 50  0001 C CNN
F 1 "GND" H 3805 6327 50  0000 C CNN
F 2 "" H 3800 6500 50  0001 C CNN
F 3 "" H 3800 6500 50  0001 C CNN
	1    3800 6500
	1    0    0    -1  
$EndComp
Wire Notes Line
	550  5850 4050 5850
Wire Notes Line
	4050 5850 4050 7700
Wire Notes Line
	4050 7700 550  7700
Wire Notes Line
	550  7700 550  5850
Text Notes 2900 7650 0    50   ~ 0
disconnect battery when\nvoltage drops below 2V
Wire Wire Line
	700  6950 700  7450
$Comp
L Device:Q_NMOS_GSD Q1
U 1 1 5E5B7982
P 3150 6800
F 0 "Q1" H 3354 6846 50  0000 L CNN
F 1 "SSM3K36FS" H 3354 6755 50  0000 L CNN
F 2 "" H 3350 6900 50  0001 C CNN
F 3 "http://toshiba.semicon-storage.com/info/docget.jsp?did=11220&prodName=SSM3K36FS" H 3150 6800 50  0001 C CNN
F 4 "https://www.digikey.de/product-detail/de/toshiba-semiconductor-and-storage/SSM3K36FS-LF/SSM3K36FSLFCT-ND/3191346" H 3150 6800 50  0001 C CNN "Digikey link"
F 5 "SSM3K36FSLFCT-ND" H 3150 6800 50  0001 C CNN "Digikey PN"
	1    3150 6800
	1    0    0    -1  
$EndComp
$Comp
L MCU_Microchip_ATmega:ATmega48PA-AU U3
U 1 1 5E857B8D
P 5450 3700
F 0 "U3" H 5450 2111 50  0000 C CNN
F 1 "ATmega48PA-AU" H 5450 2020 50  0000 C CNN
F 2 "Package_QFP:TQFP-32_7x7mm_P0.8mm" H 5450 3700 50  0001 C CIN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48PA_88PA_168PA-Data-Sheet-40002011A.pdf" H 5450 3700 50  0001 C CNN
F 4 " ATMEGA48PA-AURCT-ND" H 5450 3700 50  0001 C CNN "Digikey PN"
F 5 "https://www.digikey.de/product-detail/de/microchip-technology/ATMEGA48PA-AUR/ATMEGA48PA-AURCT-ND/3789467" H 5450 3700 50  0001 C CNN "Digikey link"
	1    5450 3700
	1    0    0    -1  
$EndComp
$Comp
L Device:C C3
U 1 1 5E888344
P 4550 1950
F 0 "C3" H 4665 1996 50  0000 L CNN
F 1 "100n" H 4665 1905 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 4588 1800 50  0001 C CNN
F 3 "~" H 4550 1950 50  0001 C CNN
	1    4550 1950
	1    0    0    -1  
$EndComp
Wire Wire Line
	4550 1700 5450 1700
$Comp
L power:GND #PWR09
U 1 1 5E88834B
P 4550 2150
F 0 "#PWR09" H 4550 1900 50  0001 C CNN
F 1 "GND" H 4555 1977 50  0000 C CNN
F 2 "" H 4550 2150 50  0001 C CNN
F 3 "" H 4550 2150 50  0001 C CNN
	1    4550 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	4550 2150 4550 2100
Wire Wire Line
	5550 1700 5550 2200
Wire Wire Line
	5450 1700 5450 2200
Connection ~ 5450 1700
Wire Wire Line
	5450 1700 5550 1700
Wire Wire Line
	4550 1700 4550 1800
Wire Wire Line
	6150 2700 6050 2700
Text GLabel 6150 2600 2    50   Input ~ 0
IRQ
Wire Wire Line
	6150 2600 6050 2600
Wire Wire Line
	6150 4800 6050 4800
Wire Wire Line
	6150 4900 6050 4900
Text GLabel 1700 1700 0    50   Input ~ 0
Reset
Text GLabel 1700 1500 0    50   Input ~ 0
ISP_MISO
Text GLabel 2400 1600 2    50   Input ~ 0
ISP_MOSI
Text GLabel 1700 1600 0    50   Input ~ 0
ISP_SCK
Text GLabel 7100 2650 1    50   Input ~ 0
ISP_MISO
Text GLabel 7250 2650 1    50   Input ~ 0
ISP_MOSI
Text GLabel 6950 2650 1    50   Input ~ 0
ISP_SCK
$Comp
L Device:R R3
U 1 1 5E925192
P 7600 2600
F 0 "R3" V 7393 2600 50  0000 C CNN
F 1 "330" V 7484 2600 50  0000 C CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" V 7530 2600 50  0001 C CNN
F 3 "~" H 7600 2600 50  0001 C CNN
	1    7600 2600
	0    1    1    0   
$EndComp
$Comp
L Device:R R4
U 1 1 5E92566D
P 7600 2900
F 0 "R4" V 7393 2900 50  0000 C CNN
F 1 "330" V 7484 2900 50  0000 C CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" V 7530 2900 50  0001 C CNN
F 3 "~" H 7600 2900 50  0001 C CNN
	1    7600 2900
	0    1    1    0   
$EndComp
$Comp
L Device:R R5
U 1 1 5E9299BA
P 7600 3200
F 0 "R5" V 7393 3200 50  0000 C CNN
F 1 "330" V 7484 3200 50  0000 C CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" V 7530 3200 50  0001 C CNN
F 3 "~" H 7600 3200 50  0001 C CNN
	1    7600 3200
	0    1    1    0   
$EndComp
Wire Wire Line
	7850 3200 7750 3200
Wire Wire Line
	7850 2900 7750 2900
Wire Wire Line
	7750 2600 7850 2600
Wire Wire Line
	7400 2800 7400 2600
Wire Wire Line
	7400 2600 7450 2600
Wire Wire Line
	6050 2800 7400 2800
Wire Wire Line
	6050 2900 7100 2900
Wire Wire Line
	7400 3000 7400 3200
Wire Wire Line
	7400 3200 7450 3200
Wire Wire Line
	6050 3000 6950 3000
Wire Wire Line
	6950 3000 6950 2650
Connection ~ 6950 3000
Wire Wire Line
	6950 3000 7400 3000
Wire Wire Line
	7100 2650 7100 2900
Connection ~ 7100 2900
Wire Wire Line
	7100 2900 7250 2900
Wire Wire Line
	7250 2900 7250 2650
Connection ~ 7250 2900
Wire Wire Line
	7250 2900 7450 2900
Connection ~ 2150 6100
Wire Wire Line
	2150 6100 3700 6100
Wire Wire Line
	3800 6500 3700 6500
Wire Wire Line
	3700 6100 3800 6100
Connection ~ 3700 6100
Connection ~ 3700 6500
Wire Wire Line
	3700 6500 3700 6450
Wire Wire Line
	3700 6150 3700 6100
$Comp
L Device:C C1
U 1 1 5E5D6526
P 3700 6300
F 0 "C1" H 3815 6346 50  0000 L CNN
F 1 "10uF" H 3815 6255 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 3738 6150 50  0001 C CNN
F 3 "~" H 3700 6300 50  0001 C CNN
	1    3700 6300
	1    0    0    -1  
$EndComp
Wire Wire Line
	3250 6500 3550 6500
$Comp
L Connector_Generic:Conn_02x03_Odd_Even J1
U 1 1 5E81C273
P 2000 1600
F 0 "J1" H 2050 1917 50  0000 C CNN
F 1 "Conn_02x03_Odd_Even" H 2050 1826 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm" H 2000 1600 50  0001 C CNN
F 3 "~" H 2000 1600 50  0001 C CNN
	1    2000 1600
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR04
U 1 1 5E8263C4
P 2550 1500
F 0 "#PWR04" H 2550 1350 50  0001 C CNN
F 1 "VCC" H 2567 1673 50  0000 C CNN
F 2 "" H 2550 1500 50  0001 C CNN
F 3 "" H 2550 1500 50  0001 C CNN
	1    2550 1500
	1    0    0    -1  
$EndComp
Wire Wire Line
	2550 1500 2300 1500
$Comp
L power:GND #PWR05
U 1 1 5E829021
P 2550 1700
F 0 "#PWR05" H 2550 1450 50  0001 C CNN
F 1 "GND" H 2555 1527 50  0000 C CNN
F 2 "" H 2550 1700 50  0001 C CNN
F 3 "" H 2550 1700 50  0001 C CNN
	1    2550 1700
	1    0    0    -1  
$EndComp
Wire Wire Line
	2550 1700 2300 1700
Wire Wire Line
	2300 1600 2400 1600
Wire Wire Line
	1800 1500 1700 1500
Wire Wire Line
	1700 1600 1800 1600
Text Notes 1200 2200 0    50   ~ 0
Place the debug connection under the batteries\nto prevent the MCU being powered from both\nthe batteries and the debug connection.
$Comp
L Device:C C2
U 1 1 5E863B11
P 4350 2750
F 0 "C2" H 4465 2796 50  0000 L CNN
F 1 "100n" H 4465 2705 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603_HandSoldering" H 4388 2600 50  0001 C CNN
F 3 "~" H 4350 2750 50  0001 C CNN
	1    4350 2750
	1    0    0    -1  
$EndComp
Wire Wire Line
	4350 2500 4850 2500
$Comp
L power:GND #PWR08
U 1 1 5E863B18
P 4350 2950
F 0 "#PWR08" H 4350 2700 50  0001 C CNN
F 1 "GND" H 4355 2777 50  0000 C CNN
F 2 "" H 4350 2950 50  0001 C CNN
F 3 "" H 4350 2950 50  0001 C CNN
	1    4350 2950
	1    0    0    -1  
$EndComp
Wire Wire Line
	4350 2950 4350 2900
Wire Wire Line
	4350 2500 4350 2600
NoConn ~ 4850 2700
NoConn ~ 4850 2800
NoConn ~ 6050 3100
NoConn ~ 6050 3200
NoConn ~ 6050 3400
NoConn ~ 6050 3500
NoConn ~ 6050 3600
NoConn ~ 6050 3700
NoConn ~ 6050 3800
NoConn ~ 6050 3900
NoConn ~ 6050 4200
NoConn ~ 6050 4300
NoConn ~ 6050 4400
NoConn ~ 6050 4500
NoConn ~ 6050 4600
Text GLabel 6150 4700 2    50   Input ~ 0
IRQ
Wire Wire Line
	6150 4700 6050 4700
Text GLabel 9150 2950 0    50   Input ~ 0
IRQ
$Comp
L RF:NRF24L01_Breakout U4
U 1 1 5E580EDF
P 9750 2650
F 0 "U4" H 10130 2696 50  0000 L CNN
F 1 "NRF24L01_Breakout" H 10130 2605 50  0000 L CNN
F 2 "RF_Module:nRF24L01_Breakout" H 9900 3250 50  0001 L CIN
F 3 "http://www.nordicsemi.com/eng/content/download/2730/34105/file/nRF24L01_Product_Specification_v2_0.pdf" H 9750 2550 50  0001 C CNN
	1    9750 2650
	1    0    0    -1  
$EndComp
Wire Wire Line
	9250 2950 9150 2950
$Comp
L Own_Library:BU49xx U2
U 1 1 5E8BAA55
P 2250 6800
F 0 "U2" H 2007 6846 50  0000 R CNN
F 1 "BU4920G-TR" H 2007 6755 50  0000 R CNN
F 2 "Housings_SSOP:TSOP-5_1.65x3.05mm_Pitch0.95mm" H 2150 6800 50  0001 C CNN
F 3 "https://fscdn.rohm.com/en/products/databook/datasheet/ic/power/voltage_detector/bd48xxg-e.pdf" H 2150 6800 50  0001 C CNN
F 4 "BU4920GCT-ND " H 2250 6800 50  0001 C CNN "Digikey PN"
F 5 "https://www.digikey.de/product-detail/de/rohm-semiconductor/BU4920G-TR/BU4920GCT-ND/3769270" H 2250 6800 50  0001 C CNN "Dikikey link"
	1    2250 6800
	1    0    0    -1  
$EndComp
Text Notes 1150 1200 0    50   ~ 0
Debug connection
Wire Notes Line
	1150 1100 1150 2250
Wire Notes Line
	1150 2250 3150 2250
Wire Notes Line
	3150 2250 3150 1100
Wire Notes Line
	3150 1100 1150 1100
$Comp
L power:VCC #PWR0101
U 1 1 5E7A04E7
P 5450 1600
F 0 "#PWR0101" H 5450 1450 50  0001 C CNN
F 1 "VCC" H 5467 1773 50  0000 C CNN
F 2 "" H 5450 1600 50  0001 C CNN
F 3 "" H 5450 1600 50  0001 C CNN
	1    5450 1600
	1    0    0    -1  
$EndComp
Wire Wire Line
	5450 1600 5450 1700
Wire Wire Line
	9050 5100 8500 5100
Connection ~ 9050 5100
Wire Wire Line
	9050 5100 9050 5050
Wire Wire Line
	8500 5100 8500 5050
Wire Wire Line
	1800 1700 1700 1700
Text GLabel 6150 4000 2    50   Input ~ 0
Reset
Wire Wire Line
	6150 4000 6050 4000
Wire Wire Line
	5450 5200 5450 5250
Wire Wire Line
	5450 5250 5000 5250
Wire Wire Line
	5000 5250 5000 5300
NoConn ~ 6050 2500
Wire Wire Line
	3800 6100 3800 6050
$Comp
L power:PWR_FLAG #FLG0101
U 1 1 5E801D06
P 850 6100
F 0 "#FLG0101" H 850 6175 50  0001 C CNN
F 1 "PWR_FLAG" H 850 6273 50  0000 C CNN
F 2 "" H 850 6100 50  0001 C CNN
F 3 "~" H 850 6100 50  0001 C CNN
	1    850  6100
	1    0    0    -1  
$EndComp
Connection ~ 850  6100
Wire Wire Line
	850  6100 2150 6100
$Comp
L power:PWR_FLAG #FLG0102
U 1 1 5E80230C
P 850 7450
F 0 "#FLG0102" H 850 7525 50  0001 C CNN
F 1 "PWR_FLAG" H 850 7623 50  0000 C CNN
F 2 "" H 850 7450 50  0001 C CNN
F 3 "~" H 850 7450 50  0001 C CNN
	1    850  7450
	1    0    0    -1  
$EndComp
Connection ~ 850  7450
Wire Wire Line
	850  7450 2150 7450
$Comp
L power:GND #PWR0102
U 1 1 5E8112C3
P 5000 5300
F 0 "#PWR0102" H 5000 5050 50  0001 C CNN
F 1 "GND" H 5005 5127 50  0000 C CNN
F 2 "" H 5000 5300 50  0001 C CNN
F 3 "" H 5000 5300 50  0001 C CNN
	1    5000 5300
	1    0    0    -1  
$EndComp
$Comp
L power:PWR_FLAG #FLG0103
U 1 1 5E813A35
P 3550 6500
F 0 "#FLG0103" H 3550 6575 50  0001 C CNN
F 1 "PWR_FLAG" H 3550 6673 50  0000 C CNN
F 2 "" H 3550 6500 50  0001 C CNN
F 3 "~" H 3550 6500 50  0001 C CNN
	1    3550 6500
	1    0    0    -1  
$EndComp
Connection ~ 3550 6500
Wire Wire Line
	3550 6500 3700 6500
$EndSCHEMATC