rs485-moist-sensor-2019-10-08-23-19-40.sch

EESchema Schematic File Version 2
LIBS:rs485-moist-sensor-rescue
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:special
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:mechanical
LIBS:graphic_symbols
LIBS:rs485-moist-sensor-cache
EELAYER 26 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "Digital soil moisture sensor"
Date "2017-04-25"
Rev ""
Comp "Catnip electronics"
Comment1 "by Albertas Mickėnas mic@wemakethings.net"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L CRYSTAL X1
U 1 1 54D213EA
P 4850 4200
F 0 "X1" H 4850 4350 50  0000 C CNN
F 1 "16MHz" H 4850 4050 50  0000 C CNN
F 2 "Crystals:Crystal_HC49-SD_SMD" H 4850 4200 60  0001 C CNN
F 3 "" H 4850 4200 60  0000 C CNN
F 4 "MCRSD16000F183000RR" H 4850 4200 60  0001 C CNN "PartNo"
F 5 "MULTICOMP" H 4850 4200 60  0001 C CNN "Manufacturer"
F 6 "2395958" H 4850 4200 60  0001 C CNN "Distributor"
	1    4850 4200
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 54D218DE
P 5150 4350
F 0 "C2" H 5200 4450 50  0000 L CNN
F 1 "33p" H 5200 4250 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 5188 4200 30  0001 C CNN
F 3 "" H 5150 4350 60  0000 C CNN
F 4 "MC0603N330J500CT" H 5150 4350 60  0001 C CNN "PartNo"
F 5 "MULTICOMP" H 5150 4350 60  0001 C CNN "Manufacturer"
F 6 "2310585" H 5150 4350 60  0001 C CNN "Distributor"
	1    5150 4350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR13
U 1 1 54D21A04
P 4850 4500
F 0 "#PWR13" H 4850 4250 60  0001 C CNN
F 1 "GND" H 4850 4350 60  0000 C CNN
F 2 "" H 4850 4500 60  0000 C CNN
F 3 "" H 4850 4500 60  0000 C CNN
	1    4850 4500
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR6
U 1 1 54D21DD5
P 2800 1250
F 0 "#PWR6" H 2800 1100 60  0001 C CNN
F 1 "VCC" H 2800 1400 60  0000 C CNN
F 2 "" H 2800 1250 60  0000 C CNN
F 3 "" H 2800 1250 60  0000 C CNN
	1    2800 1250
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR3
U 1 1 54D21DE7
P 700 4300
F 0 "#PWR3" H 700 4050 60  0001 C CNN
F 1 "GND" H 700 4150 60  0000 C CNN
F 2 "" H 700 4300 60  0000 C CNN
F 3 "" H 700 4300 60  0000 C CNN
	1    700  4300
	1    0    0    -1  
$EndComp
$Comp
L C C3
U 1 1 54D21E5C
P 700 3250
F 0 "C3" H 750 3350 50  0000 L CNN
F 1 "1u" H 750 3150 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 738 3100 30  0001 C CNN
F 3 "" H 700 3250 60  0000 C CNN
	1    700  3250
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR2
U 1 1 54D21F25
P 700 3400
F 0 "#PWR2" H 700 3150 60  0001 C CNN
F 1 "GND" H 700 3250 60  0000 C CNN
F 2 "" H 700 3400 60  0000 C CNN
F 3 "" H 700 3400 60  0000 C CNN
	1    700  3400
	1    0    0    -1  
$EndComp
$Comp
L DIODESCH D1
U 1 1 54D21FCD
P 9550 3800
F 0 "D1" H 9550 3900 50  0000 C CNN
F 1 "BAT54" H 9550 3700 50  0000 C CNN
F 2 "SMD_Packages:SOD-523" H 9550 3800 60  0001 C CNN
F 3 "" H 9550 3800 60  0000 C CNN
F 4 "RB751S40" H 9550 3800 60  0001 C CNN "PartNo"
F 5 "NEXPERIA" H 9550 3800 60  0001 C CNN "Manufacturer"
F 6 "2575121" H 9550 3800 60  0001 C CNN "Distributor"
	1    9550 3800
	-1   0    0    1   
$EndComp
$Comp
L R R4
U 1 1 54D2209D
P 8800 4500
F 0 "R4" V 8880 4500 50  0000 C CNN
F 1 "330" V 8807 4501 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 8730 4500 30  0001 C CNN
F 3 "" H 8800 4500 30  0000 C CNN
	1    8800 4500
	0    1    1    0   
$EndComp
$Comp
L R R5
U 1 1 54D22174
P 9750 3650
F 0 "R5" V 9830 3650 50  0000 C CNN
F 1 "1M" V 9757 3651 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 9680 3650 30  0001 C CNN
F 3 "" H 9750 3650 30  0000 C CNN
	1    9750 3650
	-1   0    0    1   
$EndComp
$Comp
L R R8
U 1 1 54D221C8
P 10050 5400
F 0 "R8" V 10130 5400 50  0000 C CNN
F 1 "1M" V 10057 5401 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 9980 5400 30  0001 C CNN
F 3 "" H 10050 5400 30  0000 C CNN
	1    10050 5400
	-1   0    0    1   
$EndComp
$Comp
L GND #PWR21
U 1 1 54D2221D
P 9750 5550
F 0 "#PWR21" H 9750 5300 60  0001 C CNN
F 1 "GND" H 9750 5400 60  0000 C CNN
F 2 "" H 9750 5550 60  0000 C CNN
F 3 "" H 9750 5550 60  0000 C CNN
	1    9750 5550
	1    0    0    -1  
$EndComp
$Comp
L C C4
U 1 1 54D2222A
P 9750 3950
F 0 "C4" H 9800 4050 50  0000 L CNN
F 1 "1n" H 9800 3850 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 9788 3800 30  0001 C CNN
F 3 "" H 9750 3950 60  0000 C CNN
	1    9750 3950
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR20
U 1 1 54D222DF
P 9750 4100
F 0 "#PWR20" H 9750 3850 60  0001 C CNN
F 1 "GND" H 9750 3950 60  0000 C CNN
F 2 "" H 9750 4100 60  0000 C CNN
F 3 "" H 9750 4100 60  0000 C CNN
	1    9750 4100
	1    0    0    -1  
$EndComp
$Comp
L R R7
U 1 1 54D222F8
P 10050 3950
F 0 "R7" V 10130 3950 50  0000 C CNN
F 1 "1M" V 10057 3951 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 9980 3950 30  0001 C CNN
F 3 "" H 10050 3950 30  0000 C CNN
	1    10050 3950
	-1   0    0    1   
$EndComp
Text Label 10950 3800 2    60   ~ 0
SENSE_LOW
$Comp
L C C5
U 1 1 54D22484
P 9750 5400
F 0 "C5" H 9800 5500 50  0000 L CNN
F 1 "1n" H 9800 5300 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 9788 5250 30  0001 C CNN
F 3 "" H 9750 5400 60  0000 C CNN
	1    9750 5400
	1    0    0    -1  
$EndComp
$Comp
L R R6
U 1 1 54D2252C
P 9750 5100
F 0 "R6" V 9830 5100 50  0000 C CNN
F 1 "1M" V 9757 5101 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 9680 5100 30  0001 C CNN
F 3 "" H 9750 5100 30  0000 C CNN
	1    9750 5100
	-1   0    0    1   
$EndComp
Text Label 10950 5250 2    60   ~ 0
SENSE_HIGH/MISO
Text Label 8950 4900 2    60   ~ 0
SENSOR_TRACK
$Comp
L GND #PWR15
U 1 1 54D22F14
P 5200 7200
F 0 "#PWR15" H 5200 6950 60  0001 C CNN
F 1 "GND" H 5200 7050 60  0000 C CNN
F 2 "" H 5200 7200 60  0000 C CNN
F 3 "" H 5200 7200 60  0000 C CNN
	1    5200 7200
	1    0    0    -1  
$EndComp
$Comp
L SP3481EN-RESCUE-rs485-moist-sensor U1
U 1 1 54DF0ADA
P 6550 3400
F 0 "U1" H 6250 3750 50  0000 L CNN
F 1 "SN65HVD72" H 6650 3750 50  0000 L CNN
F 2 "Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm" H 6550 3400 50  0001 C CIN
F 3 "" H 6550 3400 60  0000 C CNN
F 4 "SN65HVD72DR" H 6550 3400 60  0001 C CNN "PartNo"
F 5 "TEXAS INSTRUMENTS" H 6550 3400 60  0001 C CNN "Manufacturer"
F 6 "2542747" H 6550 3400 60  0001 C CNN "Distributor"
	1    6550 3400
	1    0    0    -1  
$EndComp
$Comp
L C C7
U 1 1 54DF0C76
P 6800 2500
F 0 "C7" H 6850 2600 50  0000 L CNN
F 1 "1u" H 6850 2400 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 6838 2350 30  0001 C CNN
F 3 "" H 6800 2500 60  0000 C CNN
	1    6800 2500
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR18
U 1 1 54DF0CCD
P 6800 2650
F 0 "#PWR18" H 6800 2400 60  0001 C CNN
F 1 "GND" H 6800 2500 60  0000 C CNN
F 2 "" H 6800 2650 60  0000 C CNN
F 3 "" H 6800 2650 60  0000 C CNN
	1    6800 2650
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR16
U 1 1 54DF15E6
P 5950 4000
F 0 "#PWR16" H 5950 3750 60  0001 C CNN
F 1 "GND" H 5950 3850 60  0000 C CNN
F 2 "" H 5950 4000 60  0000 C CNN
F 3 "" H 5950 4000 60  0000 C CNN
	1    5950 4000
	1    0    0    -1  
$EndComp
$Comp
L R R1
U 1 1 54DF19BF
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F 0 "R1" V 3880 4300 50  0000 C CNN
F 1 "10k" V 3807 4301 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 3730 4300 30  0001 C CNN
F 3 "" H 3800 4300 30  0000 C CNN
	1    3800 4300
	0    -1   -1   0   
$EndComp
$Comp
L C C6
U 1 1 54DF1D15
P 3650 4450
F 0 "C6" H 3700 4550 50  0000 L CNN
F 1 "1u" H 3700 4350 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 3688 4300 30  0001 C CNN
F 3 "" H 3650 4450 60  0000 C CNN
	1    3650 4450
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR9
U 1 1 54DF1D84
P 3650 4600
F 0 "#PWR9" H 3650 4350 60  0001 C CNN
F 1 "GND" H 3650 4450 60  0000 C CNN
F 2 "" H 3650 4600 60  0000 C CNN
F 3 "" H 3650 4600 60  0000 C CNN
	1    3650 4600
	1    0    0    -1  
$EndComp
Text Label 3700 3500 2    60   ~ 0
SCK
Text Label 3350 4300 2    60   ~ 0
RESET
Text Label 3350 4200 2    60   ~ 0
EXCITATION
Text Label 8100 4500 0    60   ~ 0
EXCITATION
Text Label 3700 3600 2    60   ~ 0
SENSE_HIGH/MISO
Text Label 3700 3800 2    60   ~ 0
SENSE_LOW
$Comp
L THERMISTOR TH1
U 1 1 54E05F89
P 9700 2100
F 0 "TH1" V 9800 2150 50  0000 C CNN
F 1 "NCP18XH103F03RB" V 9600 2100 50  0000 C BNN
F 2 "Resistors_SMD:R_0603" H 9700 2100 60  0001 C CNN
F 3 "" H 9700 2100 60  0000 C CNN
F 4 "NCP18XH103F03RB" H 9700 2100 60  0001 C CNN "PartNo"
F 5 "MURATA" H 9700 2100 60  0001 C CNN "Manufacturer"
F 6 "2456122" H 9700 2100 60  0001 C CNN "Distributor"
	1    9700 2100
	1    0    0    -1  
$EndComp
$Comp
L R R2
U 1 1 54E06028
P 9700 1700
F 0 "R2" V 9780 1700 50  0000 C CNN
F 1 "10k 0.1%" V 9707 1701 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 9630 1700 30  0001 C CNN
F 3 "" H 9700 1700 30  0000 C CNN
F 4 "ERJ3RBD1002V" H 9700 1700 60  0001 C CNN "PartNo"
F 5 "PANASONIC ELECTRONIC COMPONENTS" H 9700 1700 60  0001 C CNN "Manufacturer"
F 6 "2379939" H 9700 1700 60  0001 C CNN "Distributor"
	1    9700 1700
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR19
U 1 1 54E0608E
P 9700 2350
F 0 "#PWR19" H 9700 2100 60  0001 C CNN
F 1 "GND" H 9700 2200 60  0000 C CNN
F 2 "" H 9700 2350 60  0000 C CNN
F 3 "" H 9700 2350 60  0000 C CNN
	1    9700 2350
	1    0    0    -1  
$EndComp
Text Label 8700 1850 0    60   ~ 0
THERMISTOR
Text Label 3700 3400 2    60   ~ 0
THERMISTOR
Text Label 7450 3300 2    60   ~ 0
RS485A
Text Label 7450 3500 2    60   ~ 0
RS485B
Wire Wire Line
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Wire Wire Line
	4550 4500 5150 4500
Connection ~ 4850 4500
Wire Wire Line
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Wire Wire Line
	10050 4100 9750 4100
Connection ~ 10050 3800
Wire Wire Line
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Wire Wire Line
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Connection ~ 10050 5250
Wire Wire Line
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Wire Wire Line
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Connection ~ 9350 4500
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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$Comp
L CONN_02X03 P1
U 1 1 54E0D5F3
P 4950 7100
F 0 "P1" H 4950 7300 50  0000 C CNN
F 1 "CONN_02X03" H 4950 6900 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_2x03" H 4950 5900 60  0001 C CNN
F 3 "" H 4950 5900 60  0000 C CNN
	1    4950 7100
	1    0    0    -1  
$EndComp
Wire Wire Line
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Text Label 3800 7000 0    60   ~ 0
SENSE_HIGH/MISO
Wire Wire Line
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Text Label 5600 7100 2    60   ~ 0
MOSI
Wire Wire Line
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Text Label 4300 7100 0    60   ~ 0
SCK
Wire Wire Line
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Text Label 4300 7200 0    60   ~ 0
RESET
$Comp
L CONN_01X04 P2
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F 0 "P2" H 3350 7400 50  0000 C CNN
F 1 "CONN_01X04" V 3450 7150 50  0000 C CNN
F 2 "Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm" H 3350 7150 60  0001 C CNN
F 3 "" H 3350 7150 60  0000 C CNN
F 4 "?" H 3350 7150 60  0001 C CNN "PartNo"
F 5 "?" H 3350 7150 60  0001 C CNN "Manufacturer"
F 6 "?" H 3350 7150 60  0001 C CNN "Distributor"
	1    3350 7150
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR7
U 1 1 54E1FEA9
P 3150 7000
F 0 "#PWR7" H 3150 6850 60  0001 C CNN
F 1 "VCC" H 3150 7150 60  0000 C CNN
F 2 "" H 3150 7000 60  0000 C CNN
F 3 "" H 3150 7000 60  0000 C CNN
	1    3150 7000
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR8
U 1 1 54E1FECE
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F 0 "#PWR8" H 3150 7050 60  0001 C CNN
F 1 "GND" H 3150 7150 60  0000 C CNN
F 2 "" H 3150 7300 60  0000 C CNN
F 3 "" H 3150 7300 60  0000 C CNN
	1    3150 7300
	1    0    0    -1  
$EndComp
Wire Wire Line
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Text Label 2450 7100 0    60   ~ 0
RS485A
Wire Wire Line
	3150 7200 2450 7200
Text Label 2450 7200 0    60   ~ 0
RS485B
Connection ~ 9750 3800
Connection ~ 3800 1500
$Comp
L C C8
U 1 1 5894656E
P 3800 1650
F 0 "C8" H 3850 1750 50  0000 L CNN
F 1 "1u" H 3850 1550 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 3838 1500 30  0001 C CNN
F 3 "" H 3800 1650 60  0000 C CNN
	1    3800 1650
	-1   0    0    -1  
$EndComp
$Comp
L GND #PWR11
U 1 1 58946682
P 4100 1950
F 0 "#PWR11" H 4100 1700 60  0001 C CNN
F 1 "GND" H 4100 1800 60  0000 C CNN
F 2 "" H 4100 1950 60  0000 C CNN
F 3 "" H 4100 1950 60  0000 C CNN
	1    4100 1950
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 1950 4100 1700
$Comp
L C C9
U 1 1 58946780
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F 0 "C9" H 4900 1750 50  0000 L CNN
F 1 "1u" H 4900 1550 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 4888 1500 30  0001 C CNN
F 3 "" H 4850 1650 60  0000 C CNN
	1    4850 1650
	1    0    0    -1  
$EndComp
Wire Wire Line
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Connection ~ 4100 1950
Wire Wire Line
	4850 1950 4850 1800
$Comp
L +3V3 #PWR12
U 1 1 5894698F
P 4850 1350
F 0 "#PWR12" H 2050 400 50  0001 C CNN
F 1 "+3V3" H 4865 1523 50  0000 C CNN
F 2 "" H 2050 550 60  0000 C CNN
F 3 "" H 2050 550 60  0000 C CNN
	1    4850 1350
	1    0    0    -1  
$EndComp
Wire Wire Line
	4850 1500 4850 1350
$Comp
L +3V3 #PWR1
U 1 1 58946A8E
P 700 3100
F 0 "#PWR1" H -2100 2150 50  0001 C CNN
F 1 "+3V3" H 715 3273 50  0000 C CNN
F 2 "" H -2100 2300 60  0000 C CNN
F 3 "" H -2100 2300 60  0000 C CNN
	1    700  3100
	1    0    0    -1  
$EndComp
$Comp
L +3V3 #PWR17
U 1 1 58946C25
P 6800 2350
F 0 "#PWR17" H 4000 1400 50  0001 C CNN
F 1 "+3V3" H 6815 2523 50  0000 C CNN
F 2 "" H 4000 1550 60  0000 C CNN
F 3 "" H 4000 1550 60  0000 C CNN
	1    6800 2350
	1    0    0    -1  
$EndComp
Connection ~ 6800 2350
$Comp
L +3V3 #PWR14
U 1 1 589472AD
P 5200 7000
F 0 "#PWR14" H 2400 6050 50  0001 C CNN
F 1 "+3V3" H 5215 7173 50  0000 C CNN
F 2 "" H 2400 6200 60  0000 C CNN
F 3 "" H 2400 6200 60  0000 C CNN
	1    5200 7000
	1    0    0    -1  
$EndComp
$Comp
L +3V3 #PWR10
U 1 1 58947B36
P 3950 4300
F 0 "#PWR10" H 1150 3350 50  0001 C CNN
F 1 "+3V3" H 4100 4400 50  0000 C CNN
F 2 "" H 1150 3500 60  0000 C CNN
F 3 "" H 1150 3500 60  0000 C CNN
	1    3950 4300
	1    0    0    -1  
$EndComp
$Comp
L Q_PMOS_GSD-RESCUE-rs485-moist-sensor Q1
U 1 1 5894816E
P 3150 1600
F 0 "Q1" V 3478 1600 50  0000 C CNN
F 1 "Q_PMOS_GSD" V 3387 1600 50  0000 C CNN
F 2 "Housings_SOT-23_SOT-143_TSOT-6:SOT-23" V 3600 1450 29  0001 C CNN
F 3 "" H 5450 850 60  0000 C CNN
F 4 "NX2301P" H 3150 1600 60  0001 C CNN "PartNo"
F 5 "NXP" H 3150 1600 60  0001 C CNN "Manufacturer"
F 6 "1894738" H 3150 1600 60  0001 C CNN "Distributor"
	1    3150 1600
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3350 1500 3800 1500
Wire Wire Line
	2800 1250 2800 1500
Wire Wire Line
	2800 1500 2950 1500
Wire Wire Line
	3150 1800 3150 1950
Connection ~ 3800 1950
Connection ~ 3150 1950
Wire Wire Line
	6950 3500 7450 3500
$Comp
L TVS-ARRAY D4
U 1 1 5895AEC2
P 1950 1500
F 0 "D4" H 2281 1496 50  0000 L CNN
F 1 "NUP4004M5T1G" H 2281 1405 50  0000 L CNN
F 2 "Housings_SOT-23_SOT-143_TSOT-6:SOT-23-5" H 2050 1150 60  0001 C CNN
F 3 "" V 850 50  60  0000 C CNN
F 4 "NUP4004M5T1G" H 1950 1500 60  0001 C CNN "PartNo"
F 5 "ON SEMICONDUCTOR" H 1950 1500 60  0001 C CNN "Manufacturer"
F 6 "2317504" H 1950 1500 60  0001 C CNN "Distributor"
	1    1950 1500
	-1   0    0    -1  
$EndComp
Wire Wire Line
	1900 1950 4850 1950
Text Label 2150 750  0    60   ~ 0
RS485A
Text Label 2150 850  0    60   ~ 0
RS485B
Wire Wire Line
	2150 750  1850 750 
Wire Wire Line
	1850 750  1850 1150
Wire Wire Line
	2150 850  2000 850 
Wire Wire Line
	2000 850  2000 1150
Wire Wire Line
	3800 1800 3800 1950
$Comp
L ATTINY441-SSU IC1
U 1 1 58970948
P 1750 3700
F 0 "IC1" H 1750 4612 40  0000 C CNN
F 1 "ATTINY441-SSU" H 1750 4536 40  0000 C CNN
F 2 "Housings_SOIC:SOIC-14_3.9x8.7mm_Pitch1.27mm" H 1750 4464 35  0000 C CIN
F 3 "" H -2000 950 60  0000 C CNN
F 4 "ATTINY441-SSU" H 1750 3700 60  0001 C CNN "PartNo"
F 5 "MICROCHIP" H 1750 3700 60  0001 C CNN "Manufacturer"
F 6 "2396717" H 1750 3700 60  0001 C CNN "Distributor"
	1    1750 3700
	1    0    0    -1  
$EndComp
Wire Wire Line
	2800 3700 3700 3700
Text Label 3700 3700 2    60   ~ 0
MOSI
$Comp
L MCP1702 U2
U 1 1 58976A14
P 4100 1500
F 0 "U2" H 4100 1871 50  0000 C CNN
F 1 "MCP1702" H 4100 1780 50  0000 C CNN
F 2 "Housings_SOT-23_SOT-143_TSOT-6:SOT-23" H 4100 1681 60  0001 C CNN
F 3 "" H -1100 300 60  0000 C CNN
F 4 "MCP1702T-3302E/CB" H 4100 1500 60  0001 C CNN "PartNo"
F 5 "MICROCHIP" H 4100 1500 60  0001 C CNN "Manufacturer"
F 6 "1331490" H 4100 1500 60  0001 C CNN "Distributor"
	1    4100 1500
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR4
U 1 1 58971B39
P 1700 1150
F 0 "#PWR4" H 1700 1000 60  0001 C CNN
F 1 "VCC" H 1700 1300 60  0000 C CNN
F 2 "" H 1700 1150 60  0000 C CNN
F 3 "" H 1700 1150 60  0000 C CNN
	1    1700 1150
	1    0    0    -1  
$EndComp
$Comp
L VCC #PWR5
U 1 1 58972379
P 2150 1150
F 0 "#PWR5" H 2150 1000 60  0001 C CNN
F 1 "VCC" H 2150 1300 60  0000 C CNN
F 2 "" H 2150 1150 60  0000 C CNN
F 3 "" H 2150 1150 60  0000 C CNN
	1    2150 1150
	1    0    0    -1  
$EndComp
Text Label 3700 3200 2    60   ~ 0
TX
Text Label 3700 3300 2    60   ~ 0
RX
Text Label 3900 3100 2    60   ~ 0
RS485_READER_ENABLE
$Comp
L C C1
U 1 1 58F5EE9F
P 4550 4350
F 0 "C1" H 4600 4450 50  0000 L CNN
F 1 "33p" H 4600 4250 50  0000 L CNN
F 2 "Capacitors_SMD:C_0603" H 4588 4200 30  0001 C CNN
F 3 "" H 4550 4350 60  0000 C CNN
F 4 "MC0603N330J500CT" H 4550 4350 60  0001 C CNN "PartNo"
F 5 "MULTICOMP" H 4550 4350 60  0001 C CNN "Manufacturer"
F 6 "2310585" H 4550 4350 60  0001 C CNN "Distributor"
	1    4550 4350
	1    0    0    -1  
$EndComp
$Comp
L DIODESCH D2
U 1 1 58F5F0DE
P 9550 5250
F 0 "D2" H 9550 5350 50  0000 C CNN
F 1 "BAT54" H 9550 5150 50  0000 C CNN
F 2 "SMD_Packages:SOD-523" H 9550 5250 60  0001 C CNN
F 3 "" H 9550 5250 60  0000 C CNN
F 4 "RB751S40" H 9550 5250 60  0001 C CNN "PartNo"
F 5 "NEXPERIA" H 9550 5250 60  0001 C CNN "Manufacturer"
F 6 "2575121" H 9550 5250 60  0001 C CNN "Distributor"
	1    9550 5250
	1    0    0    -1  
$EndComp
$Comp
L R R9
U 1 1 58FEF0D0
P 5950 3850
F 0 "R9" V 6030 3850 50  0000 C CNN
F 1 "10k" V 5957 3851 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 5880 3850 30  0001 C CNN
F 3 "" H 5950 3850 30  0000 C CNN
	1    5950 3850
	1    0    0    -1  
$EndComp
Wire Wire Line
	4450 3600 6150 3600
Wire Wire Line
	5950 3700 5950 3500
Connection ~ 5950 3500
$Comp
L R R3
U 1 1 58FF80B2
P 5750 2950
F 0 "R3" V 5830 2950 50  0000 C CNN
F 1 "10k" V 5757 2951 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 5680 2950 30  0001 C CNN
F 3 "" H 5750 2950 30  0000 C CNN
	1    5750 2950
	1    0    0    -1  
$EndComp
Wire Wire Line
	5750 2350 5750 2800
Connection ~ 6550 2350
Wire Wire Line
	5750 3100 5750 3600
Connection ~ 5750 3600
Wire Wire Line
	3650 3700 5750 3700
Wire Wire Line
	5750 3700 5750 4400
Wire Wire Line
	5750 4400 7700 4400
Connection ~ 3650 3700
Wire Wire Line
	7700 1550 7700 4950
Wire Wire Line
	7700 1550 9700 1550
Wire Wire Line
	9750 3500 7700 3500
Connection ~ 7700 3500
Wire Wire Line
	7700 4950 9750 4950
Connection ~ 7700 4400
Wire Wire Line
	5950 4000 6550 4000
Wire Wire Line
	6550 4000 6550 3800
Connection ~ 5950 4000
Connection ~ 9750 5250
$Comp
L Mounting_Hole MK1
U 1 1 59477C0A
P 1000 6400
F 0 "MK1" H 1100 6446 50  0000 L CNN
F 1 "Mounting_Hole" H 1100 6355 50  0000 L CNN
F 2 "Mounting_Holes:MountingHole_3mm" H 1000 6400 50  0001 C CNN
F 3 "" H 1000 6400 50  0001 C CNN
	1    1000 6400
	1    0    0    -1  
$EndComp
$Comp
L Mounting_Hole MK2
U 1 1 59477C98
P 1000 6650
F 0 "MK2" H 1100 6696 50  0000 L CNN
F 1 "Mounting_Hole" H 1100 6605 50  0000 L CNN
F 2 "Mounting_Holes:MountingHole_3mm" H 1000 6650 50  0001 C CNN
F 3 "" H 1000 6650 50  0001 C CNN
	1    1000 6650
	1    0    0    -1  
$EndComp
$Comp
L Logo_Open_Hardware_Large #LOGO1
U 1 1 594784A4
P 1250 7350
F 0 "#LOGO1" H 1250 7850 50  0001 C CNN
F 1 "Logo_Open_Hardware_Large" H 1250 6950 50  0001 C CNN
F 2 "w_logo:Logo_silk_OSHW_6x6mm" H 1250 7350 50  0001 C CNN
F 3 "" H 1250 7350 50  0001 C CNN
F 4 "?" H 1250 7350 60  0001 C CNN "PartNo"
F 5 "?" H 1250 7350 60  0001 C CNN "Manufacturer"
F 6 "?" H 1250 7350 60  0001 C CNN "Distributor"
	1    1250 7350
	1    0    0    -1  
$EndComp
$EndSCHEMATC