EESchema Schematic File Version 4
LIBS:aprs_measurement_node-cache
EELAYER 29 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "APRS data aquisition module"
Date "2020-03-31"
Rev "A"
Comp "M.T. Konstapel"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Wire Wire Line
	5450 3850 5450 3925
Wire Wire Line
	5450 3925 5525 3925
Wire Wire Line
	5600 3925 5600 3850
$Comp
L power:GND #PWR0101
U 1 1 5E838366
P 5525 3925
F 0 "#PWR0101" H 5525 3675 50  0001 C CNN
F 1 "GND" H 5530 3752 50  0000 C CNN
F 2 "" H 5525 3925 50  0001 C CNN
F 3 "" H 5525 3925 50  0001 C CNN
	1    5525 3925
	1    0    0    -1  
$EndComp
Connection ~ 5525 3925
Wire Wire Line
	5525 3925 5600 3925
Wire Wire Line
	5600 1550 5600 1525
$Comp
L power:+5V #PWR0102
U 1 1 5E838A19
P 5600 1500
F 0 "#PWR0102" H 5600 1350 50  0001 C CNN
F 1 "+5V" H 5615 1673 50  0000 C CNN
F 2 "" H 5600 1500 50  0001 C CNN
F 3 "" H 5600 1500 50  0001 C CNN
	1    5600 1500
	1    0    0    -1  
$EndComp
$Comp
L Transistor_FET:2N7000 Q2
U 1 1 5E85AA8B
P 9300 5600
F 0 "Q2" V 9250 5450 50  0000 C CNN
F 1 "2N7000" V 8975 5600 50  0000 C CNN
F 2 "Package_TO_SOT_THT:TO-92L_Wide" H 9500 5525 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/2N/2N7000.pdf" H 9300 5600 50  0001 L CNN
	1    9300 5600
	0    -1   1    0   
$EndComp
$Comp
L Device:R_Small R23
U 1 1 5E85DADB
P 9675 5550
F 0 "R23" H 9616 5504 50  0000 R CNN
F 1 "2k2" H 9616 5595 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 9675 5550 50  0001 C CNN
F 3 "~" H 9675 5550 50  0001 C CNN
	1    9675 5550
	-1   0    0    1   
$EndComp
$Comp
L Device:R_Small R19
U 1 1 5E85E1BB
P 8925 5550
F 0 "R19" H 8866 5504 50  0000 R CNN
F 1 "2k2" H 8866 5595 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 8925 5550 50  0001 C CNN
F 3 "~" H 8925 5550 50  0001 C CNN
	1    8925 5550
	-1   0    0    1   
$EndComp
Wire Wire Line
	9100 5700 8925 5700
Wire Wire Line
	8925 5700 8925 5650
Wire Wire Line
	9500 5700 9675 5700
Wire Wire Line
	9675 5700 9675 5650
Wire Wire Line
	9300 5400 9300 5350
Wire Wire Line
	9300 5350 9675 5350
Wire Wire Line
	9675 5350 9675 5450
$Comp
L power:+3V3 #PWR0110
U 1 1 5E862CE3
P 9675 5350
F 0 "#PWR0110" H 9675 5200 50  0001 C CNN
F 1 "+3V3" H 9690 5523 50  0000 C CNN
F 2 "" H 9675 5350 50  0001 C CNN
F 3 "" H 9675 5350 50  0001 C CNN
	1    9675 5350
	1    0    0    -1  
$EndComp
Connection ~ 9675 5350
$Comp
L power:+5V #PWR0111
U 1 1 5E8635F6
P 8925 5350
F 0 "#PWR0111" H 8925 5200 50  0001 C CNN
F 1 "+5V" H 8940 5523 50  0000 C CNN
F 2 "" H 8925 5350 50  0001 C CNN
F 3 "" H 8925 5350 50  0001 C CNN
	1    8925 5350
	1    0    0    -1  
$EndComp
Wire Wire Line
	8925 5350 8925 5450
$Comp
L Transistor_FET:2N7000 Q1
U 1 1 5E868E7F
P 9300 4950
F 0 "Q1" V 9225 4825 50  0000 C CNN
F 1 "2N7000" V 8975 4950 50  0000 C CNN
F 2 "Package_TO_SOT_THT:TO-92L_Wide" H 9500 4875 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/2N/2N7000.pdf" H 9300 4950 50  0001 L CNN
	1    9300 4950
	0    -1   1    0   
$EndComp
$Comp
L Device:R_Small R22
U 1 1 5E868E85
P 9675 4900
F 0 "R22" H 9616 4854 50  0000 R CNN
F 1 "2k2" H 9616 4945 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 9675 4900 50  0001 C CNN
F 3 "~" H 9675 4900 50  0001 C CNN
	1    9675 4900
	-1   0    0    1   
$EndComp
$Comp
L Device:R_Small R18
U 1 1 5E868E8B
P 8925 4900
F 0 "R18" H 8866 4854 50  0000 R CNN
F 1 "2k2" H 8866 4945 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 8925 4900 50  0001 C CNN
F 3 "~" H 8925 4900 50  0001 C CNN
	1    8925 4900
	-1   0    0    1   
$EndComp
Wire Wire Line
	9100 5050 8925 5050
Wire Wire Line
	8925 5050 8925 5000
Wire Wire Line
	9500 5050 9675 5050
Wire Wire Line
	9675 5050 9675 5000
Wire Wire Line
	9300 4750 9300 4700
Wire Wire Line
	9300 4700 9675 4700
Wire Wire Line
	9675 4700 9675 4800
$Comp
L power:+3V3 #PWR0112
U 1 1 5E868E98
P 9675 4700
F 0 "#PWR0112" H 9675 4550 50  0001 C CNN
F 1 "+3V3" H 9690 4873 50  0000 C CNN
F 2 "" H 9675 4700 50  0001 C CNN
F 3 "" H 9675 4700 50  0001 C CNN
	1    9675 4700
	1    0    0    -1  
$EndComp
Connection ~ 9675 4700
$Comp
L power:+5V #PWR0113
U 1 1 5E868E9F
P 8925 4700
F 0 "#PWR0113" H 8925 4550 50  0001 C CNN
F 1 "+5V" H 8940 4873 50  0000 C CNN
F 2 "" H 8925 4700 50  0001 C CNN
F 3 "" H 8925 4700 50  0001 C CNN
	1    8925 4700
	1    0    0    -1  
$EndComp
Wire Wire Line
	8925 4700 8925 4800
Wire Wire Line
	9675 4700 10175 4700
Wire Wire Line
	9675 5700 9925 5700
Connection ~ 9675 5700
Connection ~ 9675 5050
Connection ~ 8925 5050
Connection ~ 8925 5700
Text GLabel 8625 5050 0    50   Input ~ 0
SCL
Text GLabel 8625 5700 0    50   Input ~ 0
SDA
Wire Wire Line
	6100 3300 6150 3300
Wire Wire Line
	6100 3400 6150 3400
Text GLabel 6150 3300 2    50   Input ~ 0
SDA
Text GLabel 6150 3400 2    50   Input ~ 0
SCL
$Comp
L Device:CP_Small C7
U 1 1 5E8B3248
P 6550 7100
F 0 "C7" H 6638 7146 50  0000 L CNN
F 1 "1U/10V" H 6638 7055 50  0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 6550 7100 50  0001 C CNN
F 3 "~" H 6550 7100 50  0001 C CNN
	1    6550 7100
	1    0    0    -1  
$EndComp
Wire Wire Line
	5800 6900 5575 6900
Wire Wire Line
	5575 6900 5575 7000
Wire Wire Line
	6400 6900 6550 6900
Wire Wire Line
	6550 6900 6550 7000
Wire Wire Line
	6550 7200 6550 7225
Wire Wire Line
	6550 7225 6100 7225
Wire Wire Line
	5575 7225 5575 7200
Wire Wire Line
	6100 7200 6100 7225
Connection ~ 6100 7225
Wire Wire Line
	6100 7225 5575 7225
$Comp
L power:+5V #PWR0115
U 1 1 5E8BE790
P 5575 6900
F 0 "#PWR0115" H 5575 6750 50  0001 C CNN
F 1 "+5V" H 5590 7073 50  0000 C CNN
F 2 "" H 5575 6900 50  0001 C CNN
F 3 "" H 5575 6900 50  0001 C CNN
	1    5575 6900
	1    0    0    -1  
$EndComp
Connection ~ 5575 6900
$Comp
L power:+3V3 #PWR0116
U 1 1 5E8BF077
P 6550 6900
F 0 "#PWR0116" H 6550 6750 50  0001 C CNN
F 1 "+3V3" H 6565 7073 50  0000 C CNN
F 2 "" H 6550 6900 50  0001 C CNN
F 3 "" H 6550 6900 50  0001 C CNN
	1    6550 6900
	1    0    0    -1  
$EndComp
Connection ~ 6550 6900
$Comp
L power:GND #PWR0117
U 1 1 5E8BF6E0
P 5575 7225
F 0 "#PWR0117" H 5575 6975 50  0001 C CNN
F 1 "GND" H 5580 7052 50  0000 C CNN
F 2 "" H 5575 7225 50  0001 C CNN
F 3 "" H 5575 7225 50  0001 C CNN
	1    5575 7225
	1    0    0    -1  
$EndComp
Text GLabel 1675 5225 0    50   Input ~ 0
TX
Text GLabel 1675 4925 0    50   Input ~ 0
RX
Text GLabel 6150 3000 2    50   Input ~ 0
RX
Text GLabel 6150 3100 2    50   Input ~ 0
TX
Text GLabel 1675 5125 0    50   Input ~ 0
DE
Wire Wire Line
	2425 4525 2425 4325
$Comp
L power:+5V #PWR0119
U 1 1 5E9947EF
P 2425 4325
F 0 "#PWR0119" H 2425 4175 50  0001 C CNN
F 1 "+5V" H 2440 4498 50  0000 C CNN
F 2 "" H 2425 4325 50  0001 C CNN
F 3 "" H 2425 4325 50  0001 C CNN
	1    2425 4325
	1    0    0    -1  
$EndComp
Connection ~ 2425 4325
$Comp
L power:GND #PWR0120
U 1 1 5E994CF8
P 2425 5850
F 0 "#PWR0120" H 2425 5600 50  0001 C CNN
F 1 "GND" H 2430 5677 50  0000 C CNN
F 2 "" H 2425 5850 50  0001 C CNN
F 3 "" H 2425 5850 50  0001 C CNN
	1    2425 5850
	1    0    0    -1  
$EndComp
Text GLabel 1675 5025 0    50   Input ~ 0
RE
Wire Wire Line
	6100 3000 6150 3000
Wire Wire Line
	6150 3100 6100 3100
$Comp
L Device:R_Small R14
U 1 1 5E9A2074
P 3375 5075
F 0 "R14" H 3316 5029 50  0000 R CNN
F 1 "120R" H 3316 5120 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 3375 5075 50  0001 C CNN
F 3 "~" H 3375 5075 50  0001 C CNN
	1    3375 5075
	-1   0    0    1   
$EndComp
Wire Wire Line
	3275 5225 3375 5225
Wire Wire Line
	3375 5175 3375 5225
Connection ~ 3375 5225
Wire Wire Line
	3725 4925 3725 5025
Wire Wire Line
	3725 5125 3725 5225
Wire Wire Line
	3375 5225 3725 5225
$Comp
L Connector:Conn_01x03_Male J2
U 1 1 5E9B8693
P 4050 5125
F 0 "J2" H 4075 5300 50  0000 R CNN
F 1 "RS-485" H 4000 5125 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 4050 5125 50  0001 C CNN
F 3 "~" H 4050 5125 50  0001 C CNN
	1    4050 5125
	-1   0    0    -1  
$EndComp
Wire Wire Line
	3850 5125 3725 5125
Wire Wire Line
	3725 5025 3850 5025
$Comp
L Device:R_Small R8
U 1 1 5E9CC896
P 3175 4925
F 0 "R8" V 3371 4925 50  0000 C CNN
F 1 "10R" V 3280 4925 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 3175 4925 50  0001 C CNN
F 3 "~" H 3175 4925 50  0001 C CNN
	1    3175 4925
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_Small R9
U 1 1 5E9CD12D
P 3175 5225
F 0 "R9" V 3371 5225 50  0000 C CNN
F 1 "10R" V 3280 5225 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 3175 5225 50  0001 C CNN
F 3 "~" H 3175 5225 50  0001 C CNN
	1    3175 5225
	0    -1   -1   0   
$EndComp
Wire Wire Line
	2425 5800 2425 5850
Wire Wire Line
	2425 5625 2425 5800
Connection ~ 2425 5800
Wire Wire Line
	3850 5225 3850 5800
Wire Wire Line
	4950 2100 4850 2100
Wire Wire Line
	4950 2200 4850 2200
Text GLabel 4850 2100 0    50   Input ~ 0
RE
Text GLabel 4850 2200 0    50   Input ~ 0
DE
Text Notes 1250 5750 0    50   ~ 0
Low power shutdown:\nbring /RE high and DE low
$Comp
L aprs_measurement_node-rescue:MAX487E-aprs_module-cache U1
U 1 1 5EA0C442
P 2425 5025
F 0 "U1" H 2500 5575 50  0000 C CNN
F 1 "MAX487E" H 2625 5475 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm_Socket_LongPads" H 2425 4325 50  0001 C CNN
F 3 "" H 2425 5075 50  0001 C CNN
	1    2425 5025
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C2
U 1 1 5EA0EA82
P 1550 4500
F 0 "C2" H 1642 4546 50  0000 L CNN
F 1 "100n" H 1642 4455 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D7.5mm_W2.5mm_P5.00mm" H 1550 4500 50  0001 C CNN
F 3 "~" H 1550 4500 50  0001 C CNN
	1    1550 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	1550 4325 1550 4400
$Comp
L power:GND #PWR0121
U 1 1 5EA14F18
P 1550 4600
F 0 "#PWR0121" H 1550 4350 50  0001 C CNN
F 1 "GND" H 1555 4427 50  0000 C CNN
F 2 "" H 1550 4600 50  0001 C CNN
F 3 "" H 1550 4600 50  0001 C CNN
	1    1550 4600
	1    0    0    -1  
$EndComp
$Comp
L aprs_measurement_node-rescue:intercom-rescue_ArduinoMini-intercom-cache U2
U 1 1 5E8302B8
P 5550 3600
F 0 "U2" H 5225 5525 60  0000 C CNN
F 1 "Arduino Pro Mini" H 6050 3500 60  0000 C TNN
F 2 "aprs_module:Arduino_mini_pro" H 5750 3500 60  0001 C CNN
F 3 "" H 5750 3500 60  0001 C CNN
	1    5550 3600
	1    0    0    -1  
$EndComp
$Comp
L Regulator_Switching:TSR_1-2450 U3
U 1 1 5EA22041
P 5075 7000
F 0 "U3" H 5075 7367 50  0000 C CNN
F 1 "TSR_1-2450" H 5075 7276 50  0000 C CNN
F 2 "Converter_DCDC:Converter_DCDC_TRACO_TSR-1_THT" H 5075 6850 50  0001 L CIN
F 3 "http://www.tracopower.com/products/tsr1.pdf" H 5075 7000 50  0001 C CNN
	1    5075 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	5475 6900 5575 6900
Wire Wire Line
	5075 7225 5075 7200
Wire Wire Line
	5075 7225 5575 7225
Connection ~ 5575 7225
$Comp
L power:+12V #PWR0122
U 1 1 5EA3C4FA
P 3925 6625
F 0 "#PWR0122" H 3925 6475 50  0001 C CNN
F 1 "+12V" H 3940 6798 50  0000 C CNN
F 2 "" H 3925 6625 50  0001 C CNN
F 3 "" H 3925 6625 50  0001 C CNN
	1    3925 6625
	1    0    0    -1  
$EndComp
$Comp
L Device:CP_Small C3
U 1 1 5EA42057
P 3925 7100
F 0 "C3" H 4100 7175 50  0000 R CNN
F 1 "100U/50V" H 4400 7050 50  0000 R CNN
F 2 "Capacitor_THT:CP_Radial_D8.0mm_P3.50mm" H 3925 7100 50  0001 C CNN
F 3 "~" H 3925 7100 50  0001 C CNN
	1    3925 7100
	1    0    0    -1  
$EndComp
Wire Wire Line
	3925 7200 3925 7225
Wire Wire Line
	3925 7000 3925 6900
Connection ~ 3925 6900
$Comp
L Mechanical:MountingHole H1
U 1 1 5E83C5F2
P 800 6525
F 0 "H1" H 900 6571 50  0000 L CNN
F 1 "MountingHole" H 900 6480 50  0000 L CNN
F 2 "MountingHole:MountingHole_3.2mm_M3_DIN965_Pad" H 800 6525 50  0001 C CNN
F 3 "~" H 800 6525 50  0001 C CNN
	1    800  6525
	1    0    0    -1  
$EndComp
$Comp
L Mechanical:MountingHole H2
U 1 1 5E83DAD6
P 800 6725
F 0 "H2" H 900 6771 50  0000 L CNN
F 1 "MountingHole" H 900 6680 50  0000 L CNN
F 2 "MountingHole:MountingHole_3.2mm_M3_DIN965_Pad" H 800 6725 50  0001 C CNN
F 3 "~" H 800 6725 50  0001 C CNN
	1    800  6725
	1    0    0    -1  
$EndComp
$Comp
L Mechanical:MountingHole H3
U 1 1 5E83DBC8
P 800 6925
F 0 "H3" H 900 6971 50  0000 L CNN
F 1 "MountingHole" H 900 6880 50  0000 L CNN
F 2 "MountingHole:MountingHole_3.2mm_M3_DIN965_Pad" H 800 6925 50  0001 C CNN
F 3 "~" H 800 6925 50  0001 C CNN
	1    800  6925
	1    0    0    -1  
$EndComp
$Comp
L Mechanical:MountingHole H4
U 1 1 5E83DE61
P 800 7125
F 0 "H4" H 900 7171 50  0000 L CNN
F 1 "MountingHole" H 900 7080 50  0000 L CNN
F 2 "MountingHole:MountingHole_3.2mm_M3_DIN965_Pad" H 800 7125 50  0001 C CNN
F 3 "~" H 800 7125 50  0001 C CNN
	1    800  7125
	1    0    0    -1  
$EndComp
Text Notes 2200 6200 0    50   ~ 0
RS-485 DRIVER
Text Notes 9025 5950 0    50   ~ 0
LEVEL CONVERTER
$Comp
L Connector:Conn_01x02_Male J1
U 1 1 5E95C6D4
P 2075 7025
F 0 "J1" H 2075 7100 50  0000 C CNN
F 1 "13.8V INPUT" H 1800 6975 50  0000 C CNN
F 2 "TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal" H 2075 7025 50  0001 C CNN
F 3 "~" H 2075 7025 50  0001 C CNN
	1    2075 7025
	1    0    0    -1  
$EndComp
$Comp
L Regulator_Linear:MCP1700-3302E_TO92 U4
U 1 1 5E98248B
P 6100 6900
F 0 "U4" H 6100 6658 50  0000 C CNN
F 1 "MCP1700-3302E" H 6100 6749 50  0000 C CNN
F 2 "Package_TO_SOT_THT:TO-92L_Wide" H 6100 6700 50  0001 C CIN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/20001826D.pdf" H 6100 6900 50  0001 C CNN
	1    6100 6900
	1    0    0    1   
$EndComp
$Comp
L Device:CP_Small C4
U 1 1 5E9867DB
P 5575 7100
F 0 "C4" H 5663 7146 50  0000 L CNN
F 1 "1U/10V" H 5663 7055 50  0000 L CNN
F 2 "Capacitor_THT:CP_Radial_D5.0mm_P2.50mm" H 5575 7100 50  0001 C CNN
F 3 "~" H 5575 7100 50  0001 C CNN
	1    5575 7100
	1    0    0    -1  
$EndComp
$Comp
L Connector:Conn_01x02_Male J4
U 1 1 5E939FA7
P 2075 6625
F 0 "J4" H 2075 6700 50  0000 C CNN
F 1 "13.8V OUTPUT" H 1800 6575 50  0000 C CNN
F 2 "TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal" H 2075 6625 50  0001 C CNN
F 3 "~" H 2075 6625 50  0001 C CNN
	1    2075 6625
	1    0    0    -1  
$EndComp
Wire Wire Line
	2275 6725 2400 6725
Wire Wire Line
	2275 6625 2325 6625
Wire Wire Line
	2275 7025 2325 7025
Wire Wire Line
	2275 7125 2325 7125
Wire Wire Line
	2325 7125 2325 7225
Wire Wire Line
	2325 7225 2400 7225
$Comp
L Device:R_Small R5
U 1 1 5E8B7265
P 1850 4925
F 0 "R5" V 1925 4825 50  0000 C CNN
F 1 "820R" V 1925 5025 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 1850 4925 50  0001 C CNN
F 3 "~" H 1850 4925 50  0001 C CNN
	1    1850 4925
	0    -1   -1   0   
$EndComp
Wire Wire Line
	1750 4925 1675 4925
Wire Wire Line
	1550 4325 2425 4325
Wire Wire Line
	2025 4925 1950 4925
Wire Wire Line
	1675 5025 2025 5025
Wire Wire Line
	1675 5125 2025 5125
Wire Wire Line
	1675 5225 2025 5225
$Comp
L Connector:Conn_01x04_Male J5
U 1 1 5E8D69FE
P 8050 5350
F 0 "J5" H 8100 5550 50  0000 R CNN
F 1 "I2C@5V" H 8025 5300 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 8050 5350 50  0001 C CNN
F 3 "~" H 8050 5350 50  0001 C CNN
	1    8050 5350
	1    0    0    -1  
$EndComp
Wire Wire Line
	8250 5250 8325 5250
Wire Wire Line
	8325 5250 8325 4725
Wire Wire Line
	8250 5550 8325 5550
Wire Wire Line
	8325 5550 8325 5800
$Comp
L power:GND #PWR0124
U 1 1 5E8E86BE
P 8325 5800
F 0 "#PWR0124" H 8325 5550 50  0001 C CNN
F 1 "GND" H 8330 5627 50  0000 C CNN
F 2 "" H 8325 5800 50  0001 C CNN
F 3 "" H 8325 5800 50  0001 C CNN
	1    8325 5800
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR0125
U 1 1 5E8E894F
P 8325 4725
F 0 "#PWR0125" H 8325 4575 50  0001 C CNN
F 1 "+5V" H 8340 4898 50  0000 C CNN
F 2 "" H 8325 4725 50  0001 C CNN
F 3 "" H 8325 4725 50  0001 C CNN
	1    8325 4725
	1    0    0    -1  
$EndComp
Wire Wire Line
	8250 5350 8700 5350
Wire Wire Line
	8250 5450 8775 5450
Wire Wire Line
	8625 5050 8775 5050
Wire Wire Line
	8625 5700 8700 5700
Wire Wire Line
	8700 5350 8700 5700
Connection ~ 8700 5700
Wire Wire Line
	8700 5700 8925 5700
Wire Wire Line
	8775 5450 8775 5050
Connection ~ 8775 5050
Wire Wire Line
	8775 5050 8925 5050
Text Notes 3225 4600 0    50   ~ 0
The 120R terminator resistor\nis only needed if this node is\nat the beginning or end of\nthe RS485 line.
$Comp
L Connector:Conn_01x04_Male J8
U 1 1 5E8E4B6C
P 10375 5050
F 0 "J8" H 10425 5250 50  0000 R CNN
F 1 "I2C@3V3" H 10350 5000 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 10375 5050 50  0001 C CNN
F 3 "~" H 10375 5050 50  0001 C CNN
	1    10375 5050
	-1   0    0    -1  
$EndComp
Wire Wire Line
	9675 5050 10175 5050
Wire Wire Line
	10175 4950 10175 4700
Wire Wire Line
	10175 5250 10175 5800
Wire Wire Line
	10175 5150 9925 5150
Wire Wire Line
	9925 5150 9925 5700
$Comp
L power:GND #PWR0103
U 1 1 5E8F55DA
P 10175 5800
F 0 "#PWR0103" H 10175 5550 50  0001 C CNN
F 1 "GND" H 10180 5627 50  0000 C CNN
F 2 "" H 10175 5800 50  0001 C CNN
F 3 "" H 10175 5800 50  0001 C CNN
	1    10175 5800
	1    0    0    -1  
$EndComp
$Comp
L Device:C_Small C12
U 1 1 5E8F5FEB
P 6300 2700
F 0 "C12" V 6350 2500 50  0000 L CNN
F 1 "150n" V 6225 2475 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D10.5mm_W5.0mm_P7.50mm" H 6300 2700 50  0001 C CNN
F 3 "~" H 6300 2700 50  0001 C CNN
	1    6300 2700
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_Small R10
U 1 1 5E8F68C0
P 6600 2700
F 0 "R10" V 6675 2700 50  0000 C CNN
F 1 "330R" V 6500 2700 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 6600 2700 50  0001 C CNN
F 3 "~" H 6600 2700 50  0001 C CNN
	1    6600 2700
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_POT_Small RV2
U 1 1 5E8F74A8
P 7000 2700
F 0 "RV2" V 7100 2800 50  0000 C CNN
F 1 "100k" V 6925 2525 50  0000 C CNN
F 2 "Potentiometer_THT:Potentiometer_ACP_CA9-V10_Vertical_Hole" H 7000 2700 50  0001 C CNN
F 3 "~" H 7000 2700 50  0001 C CNN
	1    7000 2700
	0    1    1    0   
$EndComp
Wire Wire Line
	6100 2700 6200 2700
Wire Wire Line
	6500 2700 6400 2700
Wire Wire Line
	6700 2700 6800 2700
Wire Wire Line
	7000 2800 7000 2850
Wire Wire Line
	7000 2850 6800 2850
Wire Wire Line
	6800 2850 6800 2700
Connection ~ 6800 2700
Wire Wire Line
	6800 2700 6900 2700
$Comp
L Device:C_Small C8
U 1 1 5E90A28B
P 4000 1800
F 0 "C8" H 4092 1846 50  0000 L CNN
F 1 "150n" H 4092 1755 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D10.5mm_W5.0mm_P7.50mm" H 4000 1800 50  0001 C CNN
F 3 "~" H 4000 1800 50  0001 C CNN
	1    4000 1800
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_Small R2
U 1 1 5E90AEFF
P 4225 1575
F 0 "R2" H 4166 1529 50  0000 R CNN
F 1 "120k" H 4166 1620 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 4225 1575 50  0001 C CNN
F 3 "~" H 4225 1575 50  0001 C CNN
	1    4225 1575
	-1   0    0    1   
$EndComp
$Comp
L Device:R_Small R3
U 1 1 5E90B317
P 4225 2025
F 0 "R3" H 4166 1979 50  0000 R CNN
F 1 "120k" H 4166 2070 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 4225 2025 50  0001 C CNN
F 3 "~" H 4225 2025 50  0001 C CNN
	1    4225 2025
	-1   0    0    1   
$EndComp
Wire Wire Line
	4225 1675 4225 1800
Connection ~ 4225 1800
Wire Wire Line
	4225 1800 4100 1800
Wire Wire Line
	4225 1800 4225 1925
Wire Wire Line
	4225 1475 4225 1425
Wire Wire Line
	4225 2125 4225 2150
$Comp
L power:GND #PWR0104
U 1 1 5E92013B
P 4225 2175
F 0 "#PWR0104" H 4225 1925 50  0001 C CNN
F 1 "GND" H 4230 2002 50  0000 C CNN
F 2 "" H 4225 2175 50  0001 C CNN
F 3 "" H 4225 2175 50  0001 C CNN
	1    4225 2175
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR0105
U 1 1 5E920420
P 4225 1425
F 0 "#PWR0105" H 4225 1275 50  0001 C CNN
F 1 "+5V" H 4240 1598 50  0000 C CNN
F 2 "" H 4225 1425 50  0001 C CNN
F 3 "" H 4225 1425 50  0001 C CNN
	1    4225 1425
	1    0    0    -1  
$EndComp
Wire Wire Line
	7225 1125 3850 1125
Wire Wire Line
	3675 1800 3850 1800
$Comp
L Connector:Conn_01x02_Male J3
U 1 1 5E929D6C
P 3475 1800
F 0 "J3" H 3475 1875 50  0000 C CNN
F 1 "Moisture sensor 1" H 3100 1750 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 3475 1800 50  0001 C CNN
F 3 "~" H 3475 1800 50  0001 C CNN
	1    3475 1800
	1    0    0    -1  
$EndComp
Wire Wire Line
	4225 2150 3675 2150
Connection ~ 4225 2150
Wire Wire Line
	4225 2150 4225 2175
Text Notes 6825 3050 0    50   ~ 0
Adjust for 500 count at\nperfect soil moisture level.
Text Notes 2075 1600 0    50   ~ 0
Soil moisture is measured with an AC\ncoupled square wave across the probe.\nAny DC across the probe from galvanic\nreactions of the soil is ignored.
$Comp
L Device:C_Small C9
U 1 1 5E96D518
P 4000 3000
F 0 "C9" H 4092 3046 50  0000 L CNN
F 1 "150n" H 4092 2955 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D10.5mm_W5.0mm_P7.50mm" H 4000 3000 50  0001 C CNN
F 3 "~" H 4000 3000 50  0001 C CNN
	1    4000 3000
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_Small R4
U 1 1 5E96D51E
P 4225 2775
F 0 "R4" H 4166 2729 50  0000 R CNN
F 1 "120k" H 4166 2820 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 4225 2775 50  0001 C CNN
F 3 "~" H 4225 2775 50  0001 C CNN
	1    4225 2775
	-1   0    0    1   
$EndComp
$Comp
L Device:R_Small R6
U 1 1 5E96D524
P 4225 3225
F 0 "R6" H 4166 3179 50  0000 R CNN
F 1 "120k" H 4166 3270 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 4225 3225 50  0001 C CNN
F 3 "~" H 4225 3225 50  0001 C CNN
	1    4225 3225
	-1   0    0    1   
$EndComp
Wire Wire Line
	4225 2875 4225 3000
Connection ~ 4225 3000
Wire Wire Line
	4225 3000 4100 3000
Wire Wire Line
	4225 3000 4225 3125
Wire Wire Line
	4225 2675 4225 2625
Wire Wire Line
	4225 3325 4225 3350
$Comp
L power:GND #PWR0106
U 1 1 5E96D531
P 4225 3375
F 0 "#PWR0106" H 4225 3125 50  0001 C CNN
F 1 "GND" H 4230 3202 50  0000 C CNN
F 2 "" H 4225 3375 50  0001 C CNN
F 3 "" H 4225 3375 50  0001 C CNN
	1    4225 3375
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR0107
U 1 1 5E96D537
P 4225 2625
F 0 "#PWR0107" H 4225 2475 50  0001 C CNN
F 1 "+5V" H 4240 2798 50  0000 C CNN
F 2 "" H 4225 2625 50  0001 C CNN
F 3 "" H 4225 2625 50  0001 C CNN
	1    4225 2625
	1    0    0    -1  
$EndComp
Wire Wire Line
	3675 3000 3750 3000
$Comp
L Connector:Conn_01x02_Male J6
U 1 1 5E96D540
P 3475 3000
F 0 "J6" H 3475 3075 50  0000 C CNN
F 1 "Moisture sensor 2" H 3075 2950 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 3475 3000 50  0001 C CNN
F 3 "~" H 3475 3000 50  0001 C CNN
	1    3475 3000
	1    0    0    -1  
$EndComp
Wire Wire Line
	4225 3350 3675 3350
Wire Wire Line
	3675 3350 3675 3100
Connection ~ 4225 3350
Wire Wire Line
	4225 3350 4225 3375
Wire Wire Line
	4950 2650 4575 2650
Wire Wire Line
	4575 2650 4575 1800
Wire Wire Line
	4575 1800 4225 1800
Wire Wire Line
	4575 2750 4575 3000
Wire Wire Line
	4575 3000 4225 3000
Wire Wire Line
	4575 2750 4950 2750
Wire Wire Line
	3850 1125 3850 1800
Connection ~ 3850 1800
Wire Wire Line
	3850 1800 3900 1800
Wire Wire Line
	3675 1900 3675 2150
$Comp
L Device:R_Small R7
U 1 1 5E994EBE
P 6600 2400
F 0 "R7" V 6675 2400 50  0000 C CNN
F 1 "330R" V 6500 2400 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 6600 2400 50  0001 C CNN
F 3 "~" H 6600 2400 50  0001 C CNN
	1    6600 2400
	0    -1   -1   0   
$EndComp
$Comp
L Device:R_POT_Small RV1
U 1 1 5E994EC4
P 7000 2400
F 0 "RV1" V 7100 2500 50  0000 C CNN
F 1 "100k" V 6925 2225 50  0000 C CNN
F 2 "Potentiometer_THT:Potentiometer_ACP_CA9-V10_Vertical_Hole" H 7000 2400 50  0001 C CNN
F 3 "~" H 7000 2400 50  0001 C CNN
	1    7000 2400
	0    1    1    0   
$EndComp
Wire Wire Line
	6500 2400 6400 2400
Wire Wire Line
	6700 2400 6800 2400
Connection ~ 6800 2400
Wire Wire Line
	6800 2400 6900 2400
Wire Wire Line
	7100 2400 7225 2400
Wire Wire Line
	3750 3000 3750 1025
Wire Wire Line
	3750 1025 7325 1025
Wire Wire Line
	7325 1025 7325 2700
Connection ~ 3750 3000
Wire Wire Line
	3750 3000 3900 3000
Wire Wire Line
	7100 2700 7325 2700
Wire Wire Line
	6200 2600 6100 2600
$Comp
L Device:C_Small C10
U 1 1 5E9BFF43
P 4475 7100
F 0 "C10" H 4567 7146 50  0000 L CNN
F 1 "100n" H 4567 7055 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D7.5mm_W2.5mm_P5.00mm" H 4475 7100 50  0001 C CNN
F 3 "~" H 4475 7100 50  0001 C CNN
	1    4475 7100
	1    0    0    -1  
$EndComp
Wire Wire Line
	3925 6900 4475 6900
Wire Wire Line
	4475 7000 4475 6900
Connection ~ 4475 6900
Wire Wire Line
	4475 6900 4675 6900
Wire Wire Line
	3925 7225 4475 7225
Connection ~ 5075 7225
Wire Wire Line
	4475 7200 4475 7225
Connection ~ 4475 7225
Wire Wire Line
	4475 7225 5075 7225
$Comp
L Transistor_FET:IRF9540N Q3
U 1 1 5EA3F718
P 3300 6725
F 0 "Q3" V 3643 6725 50  0000 C CNN
F 1 "IRF9540" V 3552 6725 50  0000 C CNN
F 2 "Package_TO_SOT_THT:TO-220-3_Vertical" H 3500 6650 50  0001 L CIN
F 3 "http://www.irf.com/product-info/datasheets/data/irf9540n.pdf" H 3300 6725 50  0001 L CNN
	1    3300 6725
	0    -1   -1   0   
$EndComp
$Comp
L Device:C_Small C6
U 1 1 5EA40458
P 3575 7100
F 0 "C6" H 3667 7146 50  0000 L CNN
F 1 "15n" H 3667 7055 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D7.5mm_W2.5mm_P5.00mm" H 3575 7100 50  0001 C CNN
F 3 "~" H 3575 7100 50  0001 C CNN
	1    3575 7100
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R1
U 1 1 5EA4099D
P 3300 7075
F 0 "R1" H 3241 7029 50  0000 R CNN
F 1 "12k" H 3241 7120 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" H 3300 7075 50  0001 C CNN
F 3 "~" H 3300 7075 50  0001 C CNN
	1    3300 7075
	-1   0    0    1   
$EndComp
$Comp
L Device:D_Zener_Small_ALT D3
U 1 1 5EA42CAE
P 3575 6775
F 0 "D3" V 3529 6843 50  0000 L CNN
F 1 "10V" V 3620 6843 50  0000 L CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" V 3575 6775 50  0001 C CNN
F 3 "~" V 3575 6775 50  0001 C CNN
	1    3575 6775
	0    1    1    0   
$EndComp
Wire Wire Line
	3500 6625 3575 6625
Wire Wire Line
	3575 6625 3575 6675
Wire Wire Line
	3925 7225 3575 7225
Connection ~ 3925 7225
Connection ~ 2400 7225
Wire Wire Line
	3575 7200 3575 7225
Connection ~ 3575 7225
Wire Wire Line
	2400 6725 2400 7225
Connection ~ 2325 6625
Wire Wire Line
	3300 7175 3300 7225
Wire Wire Line
	3300 7225 3575 7225
Wire Wire Line
	3300 6925 3300 6950
Wire Wire Line
	3300 6950 3575 6950
Connection ~ 3300 6950
Wire Wire Line
	3300 6950 3300 6975
Connection ~ 3575 6950
Wire Wire Line
	3575 6950 3575 7000
Wire Wire Line
	3575 6875 3575 6950
Wire Wire Line
	3575 6625 3925 6625
Wire Wire Line
	3925 6625 3925 6900
Connection ~ 3575 6625
Connection ~ 3925 6625
Wire Wire Line
	2325 6625 2325 7025
Text Notes 2525 7400 0    50   ~ 0
ESD and reverse polarity protection
$Comp
L Device:D_Zener_Small_ALT D1
U 1 1 5EAF3F08
P 2850 6800
F 0 "D1" V 2804 6868 50  0000 L CNN
F 1 "TVS_24V" V 2895 6868 50  0000 L CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" V 2850 6800 50  0001 C CNN
F 3 "~" V 2850 6800 50  0001 C CNN
F 4 " TC-P6KE24CA " V 2850 6800 50  0001 C CNN "Order #"
	1    2850 6800
	0    1    1    0   
$EndComp
$Comp
L Device:D_Zener_Small_ALT D2
U 1 1 5EAF50FC
P 2850 7050
F 0 "D2" V 2896 6982 50  0000 R CNN
F 1 "TVS_15V" V 2805 6982 50  0000 R CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" V 2850 7050 50  0001 C CNN
F 3 "~" V 2850 7050 50  0001 C CNN
F 4 " TC-P6KE15CA " V 2850 7050 50  0001 C CNN "Order #"
	1    2850 7050
	0    -1   -1   0   
$EndComp
Wire Wire Line
	2850 6700 2850 6625
Wire Wire Line
	2850 6900 2850 6950
Connection ~ 3300 7225
Wire Wire Line
	2850 7150 2850 7225
$Comp
L Device:C_Small C1
U 1 1 5EB22CB1
P 2500 6800
F 0 "C1" H 2592 6846 50  0000 L CNN
F 1 "150n" H 2592 6755 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D10.5mm_W5.0mm_P7.50mm" H 2500 6800 50  0001 C CNN
F 3 "~" H 2500 6800 50  0001 C CNN
	1    2500 6800
	1    0    0    -1  
$EndComp
Connection ~ 2850 6625
Wire Wire Line
	2850 6625 3100 6625
Connection ~ 2850 7225
Wire Wire Line
	2850 7225 3300 7225
Wire Wire Line
	2325 6625 2500 6625
Wire Wire Line
	2400 7225 2500 7225
$Comp
L Device:C_Small C5
U 1 1 5EB2D8FB
P 2500 7050
F 0 "C5" H 2592 7096 50  0000 L CNN
F 1 "150n" H 2592 7005 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D10.5mm_W5.0mm_P7.50mm" H 2500 7050 50  0001 C CNN
F 3 "~" H 2500 7050 50  0001 C CNN
	1    2500 7050
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 6700 2500 6625
Connection ~ 2500 6625
Wire Wire Line
	2500 6625 2850 6625
Wire Wire Line
	2500 6900 2500 6950
Wire Wire Line
	2500 7150 2500 7225
Connection ~ 2500 7225
Wire Wire Line
	2500 7225 2850 7225
Wire Wire Line
	2825 5225 3075 5225
Wire Wire Line
	2825 4925 3075 4925
Wire Wire Line
	2425 5800 3850 5800
$Comp
L Connector:Conn_01x02_Male J7
U 1 1 5E8EC5B9
P 3600 4750
F 0 "J7" H 3600 4825 50  0000 C CNN
F 1 "Termination" H 3375 4700 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 3600 4750 50  0001 C CNN
F 3 "~" H 3600 4750 50  0001 C CNN
	1    3600 4750
	-1   0    0    -1  
$EndComp
Wire Wire Line
	3275 4925 3300 4925
Wire Wire Line
	3300 4925 3300 4750
Wire Wire Line
	3300 4750 3400 4750
Connection ~ 3300 4925
Wire Wire Line
	3300 4925 3725 4925
Wire Wire Line
	3375 4975 3375 4850
Wire Wire Line
	3375 4850 3400 4850
$Comp
L Connector:Conn_01x06_Male J9
U 1 1 5E9093A7
P 6775 1500
F 0 "J9" H 6747 1474 50  0000 R CNN
F 1 "Ext. I/O" H 6747 1383 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical" H 6775 1500 50  0001 C CNN
F 3 "~" H 6775 1500 50  0001 C CNN
	1    6775 1500
	-1   0    0    -1  
$EndComp
Wire Wire Line
	6100 2000 6100 1400
Wire Wire Line
	6100 1400 6575 1400
Wire Wire Line
	6100 2100 6175 2100
Wire Wire Line
	6175 2100 6175 1500
Wire Wire Line
	6175 1500 6575 1500
Wire Wire Line
	6100 2200 6250 2200
Wire Wire Line
	6250 2200 6250 1600
Wire Wire Line
	6250 1600 6575 1600
Wire Wire Line
	6100 2300 6325 2300
Wire Wire Line
	6325 2300 6325 1700
Wire Wire Line
	6325 1700 6575 1700
Wire Wire Line
	6200 2400 6200 2600
$Comp
L Device:C_Small C11
U 1 1 5E994EB8
P 6300 2400
F 0 "C11" V 6350 2200 50  0000 L CNN
F 1 "150n" V 6225 2175 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D10.5mm_W5.0mm_P7.50mm" H 6300 2400 50  0001 C CNN
F 3 "~" H 6300 2400 50  0001 C CNN
	1    6300 2400
	0    -1   -1   0   
$EndComp
Wire Wire Line
	7000 2500 7000 2550
Wire Wire Line
	6800 2400 6800 2550
Wire Wire Line
	6800 2550 7000 2550
Wire Wire Line
	7225 1125 7225 2400
Wire Wire Line
	6575 1300 6025 1300
Wire Wire Line
	6025 1300 6025 1525
Wire Wire Line
	6025 1525 5600 1525
Connection ~ 5600 1525
Wire Wire Line
	5600 1525 5600 1500
$Comp
L power:GND #PWR0108
U 1 1 5E978A10
P 6575 1800
F 0 "#PWR0108" H 6575 1550 50  0001 C CNN
F 1 "GND" H 6580 1627 50  0000 C CNN
F 2 "" H 6575 1800 50  0001 C CNN
F 3 "" H 6575 1800 50  0001 C CNN
	1    6575 1800
	1    0    0    -1  
$EndComp
$EndSCHEMATC