EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 4
Title "MPPT 1210 HUS"
Date "2021-05-02"
Rev "0.7.1"
Comp "Copyright © 2019 Libre Solar Technologies GmbH"
Comment1 "Licensed under CERN-OHL-W version 2"
Comment2 "Author: Martin Jäger"
Comment3 "Licensed under CERN-OHL-W version 2"
Comment4 ""
$EndDescr
$Comp
L power:GND #PWR09
U 1 1 58A8D5E6
P 1700 6700
F 0 "#PWR09" H 1700 6450 50  0001 C CNN
F 1 "GND" H 1700 6550 50  0000 C CNN
F 2 "" H 1700 6700 50  0000 C CNN
F 3 "" H 1700 6700 50  0000 C CNN
	1    1700 6700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR010
U 1 1 5C855F3E
P 2050 6700
F 0 "#PWR010" H 2050 6450 50  0001 C CNN
F 1 "GND" H 2050 6550 50  0000 C CNN
F 2 "" H 2050 6700 50  0000 C CNN
F 3 "" H 2050 6700 50  0000 C CNN
	1    2050 6700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR011
U 1 1 58A8D77B
P 2400 6700
F 0 "#PWR011" H 2400 6450 50  0001 C CNN
F 1 "GND" H 2400 6550 50  0000 C CNN
F 2 "" H 2400 6700 50  0000 C CNN
F 3 "" H 2400 6700 50  0000 C CNN
	1    2400 6700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR012
U 1 1 58A8D813
P 2750 6700
F 0 "#PWR012" H 2750 6450 50  0001 C CNN
F 1 "GND" H 2750 6550 50  0000 C CNN
F 2 "" H 2750 6700 50  0000 C CNN
F 3 "" H 2750 6700 50  0000 C CNN
	1    2750 6700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR013
U 1 1 5C855F51
P 1850 2200
F 0 "#PWR013" H 1850 1950 50  0001 C CNN
F 1 "GND" H 1850 2050 50  0000 C CNN
F 2 "" H 1850 2200 50  0000 C CNN
F 3 "" H 1850 2200 50  0000 C CNN
	1    1850 2200
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR014
U 1 1 58A8DF29
P 1700 6300
F 0 "#PWR014" H 1700 6150 50  0001 C CNN
F 1 "+3.3V" H 1700 6440 50  0000 C CNN
F 2 "" H 1700 6300 50  0000 C CNN
F 3 "" H 1700 6300 50  0000 C CNN
	1    1700 6300
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR015
U 1 1 58A8E026
P 2050 6300
F 0 "#PWR015" H 2050 6150 50  0001 C CNN
F 1 "+3.3V" H 2050 6440 50  0000 C CNN
F 2 "" H 2050 6300 50  0000 C CNN
F 3 "" H 2050 6300 50  0000 C CNN
	1    2050 6300
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR016
U 1 1 58A8E0BE
P 2400 6300
F 0 "#PWR016" H 2400 6150 50  0001 C CNN
F 1 "+3.3V" H 2400 6440 50  0000 C CNN
F 2 "" H 2400 6300 50  0000 C CNN
F 3 "" H 2400 6300 50  0000 C CNN
	1    2400 6300
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR017
U 1 1 5C855F43
P 2750 6300
F 0 "#PWR017" H 2750 6150 50  0001 C CNN
F 1 "+3.3V" H 2750 6440 50  0000 C CNN
F 2 "" H 2750 6300 50  0000 C CNN
F 3 "" H 2750 6300 50  0000 C CNN
	1    2750 6300
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR018
U 1 1 5C855F44
P 3000 5300
F 0 "#PWR018" H 3000 5050 50  0001 C CNN
F 1 "GND" H 3000 5150 50  0000 C CNN
F 2 "" H 3000 5300 50  0000 C CNN
F 3 "" H 3000 5300 50  0000 C CNN
	1    3000 5300
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR024
U 1 1 5C855F52
P 3350 1800
F 0 "#PWR024" H 3350 1650 50  0001 C CNN
F 1 "+3.3V" H 3350 1940 50  0000 C CNN
F 2 "" H 3350 1800 50  0000 C CNN
F 3 "" H 3350 1800 50  0000 C CNN
	1    3350 1800
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR025
U 1 1 58A94885
P 1000 1700
F 0 "#PWR025" H 1000 1550 50  0001 C CNN
F 1 "+3.3V" H 1000 1840 50  0000 C CNN
F 2 "" H 1000 1700 50  0000 C CNN
F 3 "" H 1000 1700 50  0000 C CNN
	1    1000 1700
	1    0    0    -1  
$EndComp
$Comp
L Project:C C30
U 1 1 58AB8568
P 1700 6500
F 0 "C30" H 1720 6570 50  0000 L CNN
F 1 "100n" H 1720 6430 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 1700 6500 50  0001 C CNN
F 3 "" H 1700 6500 50  0000 C CNN
F 4 "Yageo" H 300 1000 50  0001 C CNN "Manufacturer"
F 5 "CC0603KRX7R9BB104" H 300 1000 50  0001 C CNN "PartNumber"
	1    1700 6500
	1    0    0    -1  
$EndComp
$Comp
L Project:C C31
U 1 1 58AB8BE5
P 2050 6500
F 0 "C31" H 2070 6570 50  0000 L CNN
F 1 "100n" H 2070 6430 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 2050 6500 50  0001 C CNN
F 3 "" H 2050 6500 50  0000 C CNN
F 4 "Yageo" H 300 1000 50  0001 C CNN "Manufacturer"
F 5 "CC0603KRX7R9BB104" H 300 1000 50  0001 C CNN "PartNumber"
	1    2050 6500
	1    0    0    -1  
$EndComp
$Comp
L Project:C C32
U 1 1 5C855F47
P 2400 6500
F 0 "C32" H 2420 6570 50  0000 L CNN
F 1 "100n" H 2420 6430 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 2400 6500 50  0001 C CNN
F 3 "" H 2400 6500 50  0000 C CNN
F 4 "Yageo" H 300 1000 50  0001 C CNN "Manufacturer"
F 5 "CC0603KRX7R9BB104" H 300 1000 50  0001 C CNN "PartNumber"
	1    2400 6500
	1    0    0    -1  
$EndComp
$Comp
L Project:C C33
U 1 1 5C855F48
P 2750 6500
F 0 "C33" H 2770 6570 50  0000 L CNN
F 1 "2.2u" H 2770 6430 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 2750 6500 50  0001 C CNN
F 3 "" H 2750 6500 50  0000 C CNN
F 4 "Murata" H 300 1000 50  0001 C CNN "Manufacturer"
F 5 "GRM188R61E225KA12D" H 300 1000 50  0001 C CNN "PartNumber"
F 6 "25V, X5R" H -3300 1700 60  0001 C CNN "Remarks"
	1    2750 6500
	1    0    0    -1  
$EndComp
$Comp
L Project:D_LED LED2
U 1 1 5C855F53
P 5400 6500
AR Path="/5C855F53" Ref="LED2"  Part="1" 
AR Path="/58A68DCB/5C855F53" Ref="LED4"  Part="1" 
F 0 "LED4" H 5525 6550 50  0000 L CNN
F 1 "green" H 5525 6450 50  0000 L CNN
F 2 "LibreSolar:LED_0603_D3.0mm" V 5400 6500 50  0001 C CNN
F 3 "" V 5400 6500 50  0000 C CNN
F 4 "Lite-On" H 5400 6500 60  0001 C CNN "Manufacturer"
F 5 "LTST-C190KGKT" H 5400 6500 60  0001 C CNN "PartNumber"
F 6 "Alternative: LTL-4231 (3mm THT)" H 0   0   50  0001 C CNN "Remarks"
	1    5400 6500
	-1   0    0    -1  
$EndComp
$Comp
L power:GND #PWR030
U 1 1 5C855F54
P 9500 1900
F 0 "#PWR030" H 9500 1650 50  0001 C CNN
F 1 "GND" H 9500 1750 50  0000 C CNN
F 2 "" H 9500 1900 50  0000 C CNN
F 3 "" H 9500 1900 50  0000 C CNN
	1    9500 1900
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR031
U 1 1 58C2A17E
P 9500 1500
F 0 "#PWR031" H 9500 1350 50  0001 C CNN
F 1 "+3.3V" H 9500 1640 50  0000 C CNN
F 2 "" H 9500 1500 50  0000 C CNN
F 3 "" H 9500 1500 50  0000 C CNN
	1    9500 1500
	1    0    0    -1  
$EndComp
Text Notes 4900 5100 0    100  ~ 0
Status LEDs
Text Notes 2800 1250 0    100  ~ 0
MCU STM32L072
Text Notes 9400 1000 0    100  ~ 0
STM Nucleo SWD
Text Label 1600 4300 0    50   ~ 0
USART1_TX
Text Label 1600 4400 0    50   ~ 0
USART1_RX
Text Label 1700 4700 0    50   ~ 0
SWDIO
Text Label 1700 4800 0    50   ~ 0
SWCLK
Text Label 3900 2500 2    50   ~ 0
BOOT0
Text Label 3900 2300 2    50   ~ 0
~RESET
Text Label 9600 1900 0    50   ~ 0
SWDIO
Text Label 9600 1700 0    50   ~ 0
SWCLK
Text Label 9600 2000 0    50   ~ 0
~RESET
Wire Wire Line
	3350 1800 3350 1900
Wire Wire Line
	2050 6300 2050 6400
Wire Wire Line
	1700 6300 1700 6400
Wire Wire Line
	2400 6300 2400 6400
Wire Wire Line
	2750 6400 2750 6300
Wire Wire Line
	3500 2500 3900 2500
Wire Wire Line
	2050 6700 2050 6600
Wire Wire Line
	1700 6700 1700 6600
Wire Wire Line
	2400 6600 2400 6700
Wire Wire Line
	1850 2100 1850 2200
Wire Wire Line
	2750 6600 2750 6700
Wire Wire Line
	3500 4000 4000 4000
Wire Wire Line
	3500 4100 4000 4100
Wire Wire Line
	3500 3500 4100 3500
Wire Wire Line
	3500 3400 4100 3400
Wire Wire Line
	3500 4800 4000 4800
Wire Wire Line
	2200 3800 1600 3800
Wire Wire Line
	3500 3800 4000 3800
Wire Wire Line
	3500 3900 4000 3900
Wire Wire Line
	3500 3700 4000 3700
Wire Wire Line
	2200 4800 1700 4800
Wire Wire Line
	2200 4700 1700 4700
Wire Wire Line
	2200 4400 1600 4400
Wire Wire Line
	2200 4300 1600 4300
Wire Wire Line
	2200 3700 1700 3700
Wire Wire Line
	2200 3600 1700 3600
Wire Wire Line
	2200 4500 1600 4500
Wire Wire Line
	2200 4600 1600 4600
Wire Wire Line
	1850 1800 1850 1900
Wire Wire Line
	1000 1800 1100 1800
Wire Wire Line
	1000 1800 1000 1700
Wire Wire Line
	9900 1700 9600 1700
Wire Wire Line
	9900 1900 9600 1900
Wire Wire Line
	9900 2000 9600 2000
Connection ~ 1850 1800
Text Notes 5100 7600 0    50   ~ 0
If not stated otherwise, all MLCC 50V X7R
$Comp
L power:+3.3V #PWR0101
U 1 1 5AE4F2FA
P 5700 1500
F 0 "#PWR0101" H 5700 1350 50  0001 C CNN
F 1 "+3.3V" H 5700 1640 50  0000 C CNN
F 2 "" H 5700 1500 50  0000 C CNN
F 3 "" H 5700 1500 50  0000 C CNN
	1    5700 1500
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0102
U 1 1 5C855F4B
P 7400 1700
F 0 "#PWR0102" H 7400 1450 50  0001 C CNN
F 1 "GND" H 7400 1550 50  0000 C CNN
F 2 "" H 7400 1700 50  0000 C CNN
F 3 "" H 7400 1700 50  0000 C CNN
	1    7400 1700
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR0103
U 1 1 5C855F4C
P 8500 1400
F 0 "#PWR0103" H 8500 1250 50  0001 C CNN
F 1 "+3.3V" H 8500 1540 50  0000 C CNN
F 2 "" H 8500 1400 50  0000 C CNN
F 3 "" H 8500 1400 50  0000 C CNN
	1    8500 1400
	1    0    0    -1  
$EndComp
$Comp
L power:+3.3V #PWR0104
U 1 1 5C855F4D
P 8150 1400
F 0 "#PWR0104" H 8150 1250 50  0001 C CNN
F 1 "+3.3V" H 8150 1540 50  0000 C CNN
F 2 "" H 8150 1400 50  0000 C CNN
F 3 "" H 8150 1400 50  0000 C CNN
	1    8150 1400
	1    0    0    -1  
$EndComp
$Comp
L Project:R R30
U 1 1 5C855F4E
P 8500 1600
F 0 "R30" V 8430 1600 50  0000 C CNN
F 1 "2.2k" V 8570 1600 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8500 1600 50  0001 C CNN
F 3 "" H 8500 1600 50  0000 C CNN
F 4 "Yageo" H 3350 -3750 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-072K2L" H 3350 -3750 50  0001 C CNN "PartNumber"
	1    8500 1600
	1    0    0    1   
$EndComp
$Comp
L Project:R R5
U 1 1 5C855F4F
P 8150 1600
F 0 "R5" V 8080 1600 50  0000 C CNN
F 1 "2.2k" V 8220 1600 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8150 1600 50  0001 C CNN
F 3 "" H 8150 1600 50  0000 C CNN
F 4 "Yageo" H 3350 -3750 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-072K2L" H 3350 -3750 50  0001 C CNN "PartNumber"
	1    8150 1600
	1    0    0    1   
$EndComp
$Comp
L Project:UEXT J4
U 1 1 5AE4F324
P 6300 1800
F 0 "J4" H 6050 2150 50  0000 L CNN
F 1 "UEXT" H 6550 2150 50  0000 R CNN
F 2 "LibreSolar:Box_Header_2x05x2.54mm_Straight" H 6300 1200 50  0001 C CIN
F 3 "" H 6300 1800 60  0000 C CNN
F 4 "On Shore Technology Inc." H 6300 1800 50  0001 C CNN "Manufacturer"
F 5 "302-S101" H 6300 1800 50  0001 C CNN "PartNumber"
	1    6300 1800
	1    0    0    -1  
$EndComp
Text Notes 5800 1000 0    100  ~ 0
UEXT connector
Text Notes 7850 1000 0    100  ~ 0
I2C pull-ups
Wire Wire Line
	8150 1500 8150 1400
Wire Wire Line
	8500 1500 8500 1400
Wire Wire Line
	6700 1600 7400 1600
Wire Wire Line
	7400 1600 7400 1700
Wire Wire Line
	8500 2150 8500 1700
Wire Wire Line
	5900 1700 5450 1700
Wire Wire Line
	5900 1800 5450 1800
Wire Wire Line
	5900 1900 5450 1900
Wire Wire Line
	5900 2000 5450 2000
Wire Wire Line
	6700 1700 7150 1700
Wire Wire Line
	6700 1800 7150 1800
Wire Wire Line
	6700 1900 7150 1900
Wire Wire Line
	6700 2000 7150 2000
Wire Wire Line
	8150 1700 8150 2150
Wire Wire Line
	5700 1600 5900 1600
Wire Wire Line
	5700 1600 5700 1500
Text Label 4000 4100 2    50   ~ 0
I2C1_SDA
Text Label 4000 4000 2    50   ~ 0
I2C1_SCL
Text Label 4000 3900 2    50   ~ 0
SPI1_MOSI
Text Label 4000 3800 2    50   ~ 0
SPI1_MISO
Text Label 4000 3700 2    50   ~ 0
SPI1_SCK
Text Label 1700 3600 0    50   ~ 0
USART2_TX
Text Label 1700 3700 0    50   ~ 0
USART2_RX
Text Label 1700 4900 0    50   ~ 0
SSEL
Text Label 7150 1900 2    50   ~ 0
SPI1_MOSI
Text Label 7150 2000 2    50   ~ 0
SSEL
Text Label 7150 1800 2    50   ~ 0
I2C1_SDA
Text Label 7150 1700 2    50   ~ 0
USART2_RX
Text Label 5450 1700 0    50   ~ 0
USART2_TX
Text Label 5450 1800 0    50   ~ 0
I2C1_SCL
Text Label 5450 1900 0    50   ~ 0
SPI1_MISO
Text Label 5450 2000 0    50   ~ 0
SPI1_SCK
Text Label 8150 2150 1    50   ~ 0
I2C1_SDA
Text Label 8500 2150 1    50   ~ 0
I2C1_SCL
Wire Wire Line
	2200 4900 1700 4900
$Comp
L Project:D_LED LED5
U 1 1 5B184898
P 5900 6500
F 0 "LED5" H 6025 6550 50  0000 L CNN
F 1 "green" H 6025 6450 50  0000 L CNN
F 2 "LibreSolar:LED_0603_D3.0mm" V 5900 6500 50  0001 C CNN
F 3 "" V 5900 6500 50  0000 C CNN
F 4 "Lite-On" H 5900 6500 60  0001 C CNN "Manufacturer"
F 5 "LTST-C190KGKT" H 5900 6500 60  0001 C CNN "PartNumber"
F 6 "Alternative: LTL-4231 (3mm THT)" H 0   0   50  0001 C CNN "Remarks"
	1    5900 6500
	-1   0    0    1   
$EndComp
Wire Wire Line
	3500 3000 3600 3000
$Comp
L Project:C C39
U 1 1 5B40A2C8
P 4100 2500
F 0 "C39" H 4125 2575 50  0000 L CNN
F 1 "100n" H 4125 2425 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 4100 2500 50  0001 C CNN
F 3 "" H 4100 2500 50  0000 C CNN
F 4 "Yageo" H 1900 1100 50  0001 C CNN "Manufacturer"
F 5 "CC0603KRX7R9BB104" H 1900 1100 50  0001 C CNN "PartNumber"
	1    4100 2500
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0120
U 1 1 5C855F57
P 4100 2700
F 0 "#PWR0120" H 4100 2450 50  0001 C CNN
F 1 "GND" H 4100 2550 50  0000 C CNN
F 2 "" H 4100 2700 50  0000 C CNN
F 3 "" H 4100 2700 50  0000 C CNN
	1    4100 2700
	1    0    0    -1  
$EndComp
Wire Wire Line
	4100 2600 4100 2700
Text Notes 3650 2100 0    50   ~ 0
MCU contains internal\npull-up at NRST pin
Text GLabel 1600 3800 0    50   Output ~ 0
DAC
Text GLabel 4100 3400 2    50   Output ~ 0
PWM_HS
Text GLabel 1600 4500 0    50   BiDi ~ 0
USB_DM
Text GLabel 1600 4600 0    50   BiDi ~ 0
USB_DP
Text GLabel 1600 3500 0    50   Input ~ 0
V_SOLAR
Text GLabel 1600 3400 0    50   Input ~ 0
V_BAT
Text GLabel 1600 4100 0    50   Input ~ 0
T_BAT
Text GLabel 4100 3500 2    50   Output ~ 0
PWM_LS
$Comp
L MCU_ST_STM32L0:STM32L072CZTx U2
U 1 1 5B4AF7AB
P 2800 3600
F 0 "U2" H 3200 2150 50  0000 C CNN
F 1 "STM32L072CZT6" H 2200 2150 50  0000 C CNN
F 2 "Package_QFP:LQFP-48_7x7mm_P0.5mm" H 2200 2200 50  0001 R CNN
F 3 "http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00090510.pdf" H 2800 3600 50  0001 C CNN
F 4 "ST Microelectronics" H 200 0   50  0001 C CNN "Manufacturer"
F 5 "STM32L072CZT6" H 200 0   50  0001 C CNN "PartNumber"
F 6 "Alternative: STM32L073CZT6" H 2800 3600 50  0001 C CNN "Remarks"
	1    2800 3600
	-1   0    0    -1  
$EndComp
Text GLabel 3600 3000 2    50   Output ~ 0
LOAD_EN
Text GLabel 1600 3900 0    50   Input ~ 0
I_LOAD
Text GLabel 1600 4000 0    50   Input ~ 0
I_DCDC
Text GLabel 3600 4400 2    50   Output ~ 0
USB_PWR_EN
Wire Wire Line
	2700 5100 2700 5200
Wire Wire Line
	2700 5200 2800 5200
Wire Wire Line
	3000 5200 3000 5300
Wire Wire Line
	3000 5100 3000 5200
Connection ~ 3000 5200
Wire Wire Line
	2800 5100 2800 5200
Connection ~ 2800 5200
Wire Wire Line
	2800 5200 2900 5200
Wire Wire Line
	2900 5100 2900 5200
Connection ~ 2900 5200
Wire Wire Line
	2900 5200 3000 5200
Wire Wire Line
	2600 2100 2600 2000
Wire Wire Line
	2600 2000 2800 2000
Wire Wire Line
	3000 2000 3000 2100
Wire Wire Line
	2900 2100 2900 2000
Connection ~ 2900 2000
Wire Wire Line
	2900 2000 3000 2000
Wire Wire Line
	2800 2100 2800 2000
Connection ~ 2800 2000
Wire Wire Line
	2800 2000 2900 2000
Wire Wire Line
	2700 2100 2700 1800
Wire Wire Line
	3350 1900 3000 1900
Wire Wire Line
	3000 1900 3000 2000
Connection ~ 3000 2000
Wire Wire Line
	4100 2300 4100 2400
Wire Wire Line
	3500 2300 4100 2300
Wire Wire Line
	1600 3400 2200 3400
Wire Wire Line
	2200 3500 1600 3500
Text Notes 4150 3850 0    50   ~ 0
LED1 could be controlled\nby LPTIM1_OUT in stop\nmode --> use PB2
Wire Wire Line
	2200 3900 1600 3900
Wire Wire Line
	2200 4000 1600 4000
Wire Wire Line
	1600 4100 2200 4100
Text Label 4000 4800 2    50   ~ 0
LED_B
$Comp
L Project:D_LED LED1
U 1 1 5B6AEAEC
P 5400 5900
F 0 "LED1" H 5525 5950 50  0000 L CNN
F 1 "yellow" H 5525 5850 50  0000 L CNN
F 2 "LibreSolar:LED_0603_D3.0mm" V 5400 5900 50  0001 C CNN
F 3 "" V 5400 5900 50  0000 C CNN
F 4 "Lite-On" H 5400 5900 60  0001 C CNN "Manufacturer"
F 5 "LTST-C191KSKT" H 5400 5900 60  0001 C CNN "PartNumber"
F 6 "Alternative: LTL-1CHY (3mm THT)" H 0   0   50  0001 C CNN "Remarks"
	1    5400 5900
	-1   0    0    -1  
$EndComp
$Comp
L Project:D_LED LED3
U 1 1 5B6AEB66
P 6400 5900
F 0 "LED3" H 6525 5950 50  0000 L CNN
F 1 "yellow" H 6525 5850 50  0000 L CNN
F 2 "LibreSolar:LED_0603_D3.0mm" V 6400 5900 50  0001 C CNN
F 3 "" V 6400 5900 50  0000 C CNN
F 4 "Lite-On" H 6400 5900 60  0001 C CNN "Manufacturer"
F 5 "LTST-C191KSKT" H 6400 5900 60  0001 C CNN "PartNumber"
F 6 "Alternative: LTL-1CHY (3mm THT)" H 0   0   50  0001 C CNN "Remarks"
	1    6400 5900
	-1   0    0    -1  
$EndComp
$Comp
L Project:D_LED LED2
U 1 1 5C855F5A
P 5900 5900
F 0 "LED2" H 6025 5950 50  0000 L CNN
F 1 "yellow" H 6025 5850 50  0000 L CNN
F 2 "LibreSolar:LED_0603_D3.0mm" V 5900 5900 50  0001 C CNN
F 3 "" V 5900 5900 50  0000 C CNN
F 4 "Lite-On" H 5900 5900 60  0001 C CNN "Manufacturer"
F 5 "LTST-C191KSKT" H 5900 5900 60  0001 C CNN "PartNumber"
F 6 "Alternative: LTL-1CHY (3mm THT)" H 0   0   50  0001 C CNN "Remarks"
	1    5900 5900
	-1   0    0    1   
$EndComp
Wire Wire Line
	3500 4700 4000 4700
Text Label 4000 4700 2    50   ~ 0
LED_A
Wire Wire Line
	9900 1600 9500 1600
Wire Wire Line
	9500 1600 9500 1500
Wire Wire Line
	9900 1800 9500 1800
Wire Wire Line
	9500 1800 9500 1900
$Comp
L Project:R R7
U 1 1 5BA04FBA
P 8950 4150
F 0 "R7" V 8880 4150 50  0000 C CNN
F 1 "2.2k" V 9020 4150 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8950 4150 50  0001 C CNN
F 3 "" H 8950 4150 50  0000 C CNN
F 4 "Yageo" H 4150 -1200 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-072K2L" H 4150 -1200 50  0001 C CNN "PartNumber"
	1    8950 4150
	0    1    1    0   
$EndComp
Text Notes 1250 1550 0    50   ~ 0
Measured current into\nVDDA around 1.2 mA
Text Notes 1050 2650 0    50   ~ 0
VDDA low-pass cut-off:\n1/(2*pi*RC) = 720 Hz
$Comp
L Project:R R8
U 1 1 5C364E23
P 1200 1800
F 0 "R8" V 1130 1800 50  0000 C CNN
F 1 "100" V 1270 1800 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 1200 1800 50  0001 C CNN
F 3 "" H 1200 1800 50  0000 C CNN
F 4 "Yageo" H -3600 -3550 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07100RL" H -3600 -3550 50  0001 C CNN "PartNumber"
	1    1200 1800
	0    -1   1    0   
$EndComp
$Comp
L Project:C C34
U 1 1 5C36588E
P 1500 2000
F 0 "C34" H 1520 2070 50  0000 L CNN
F 1 "2.2u" H 1520 1930 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 1500 2000 50  0001 C CNN
F 3 "" H 1500 2000 50  0000 C CNN
F 4 "Murata" H -950 -3500 50  0001 C CNN "Manufacturer"
F 5 "GRM188R61E225KA12D" H -950 -3500 50  0001 C CNN "PartNumber"
F 6 "25V, X5R" H -4550 -2800 60  0001 C CNN "Remarks"
	1    1500 2000
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR06
U 1 1 5C365BD4
P 1500 2200
F 0 "#PWR06" H 1500 1950 50  0001 C CNN
F 1 "GND" H 1500 2050 50  0000 C CNN
F 2 "" H 1500 2200 50  0000 C CNN
F 3 "" H 1500 2200 50  0000 C CNN
	1    1500 2200
	1    0    0    -1  
$EndComp
Wire Wire Line
	1300 1800 1500 1800
Wire Wire Line
	1500 1900 1500 1800
Connection ~ 1500 1800
Wire Wire Line
	1500 1800 1850 1800
Wire Wire Line
	1500 2100 1500 2200
$Comp
L Project:C C?
U 1 1 5C38F735
P 1850 2000
AR Path="/58E22D17/5C38F735" Ref="C?"  Part="1" 
AR Path="/58A68DC9/5C38F735" Ref="C?"  Part="1" 
AR Path="/58A68DCB/5C38F735" Ref="C41"  Part="1" 
F 0 "C41" H 1875 2075 50  0000 L CNN
F 1 "10n" H 1875 1925 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 1850 1800 50  0001 C CNN
F 3 "" H 1875 2075 50  0000 C CNN
F 4 "Murata" H -5450 -3800 50  0001 C CNN "Manufacturer"
F 5 "GCM188R72A103KA37D" H -5450 -3800 50  0001 C CNN "PartNumber"
F 6 "100V (not needed), X7R" H -6150 -3600 50  0001 C CNN "Remarks"
	1    1850 2000
	1    0    0    -1  
$EndComp
$Comp
L Project:ST_Nucleo_SWD_5p J8
U 1 1 5C4851DA
P 10200 1800
F 0 "J8" H 10000 2150 50  0000 L CNN
F 1 "ST_Nucleo_SWD" H 10000 1450 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical" H 10200 1350 30  0001 C CIN
F 3 "" H 10350 1850 60  0000 C CNN
F 4 "Harwin" H 10200 1800 50  0001 C CNN "Manufacturer"
F 5 "M20-9990546" H 10200 1800 50  0001 C CNN "PartNumber"
F 6 "Alternative: Standard 2.54 mm pitch header 1x5" H 10200 1800 50  0001 C CNN "Remarks"
	1    10200 1800
	1    0    0    -1  
$EndComp
$Comp
L Project:R R14
U 1 1 5C7FD229
P 4900 5600
F 0 "R14" V 4830 5600 50  0000 C CNN
F 1 "470" V 4970 5600 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 4900 5600 50  0001 C CNN
F 3 "" H 4900 5600 50  0000 C CNN
F 4 "Yageo" H 100 250 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07470RL" H 100 250 50  0001 C CNN "PartNumber"
	1    4900 5600
	0    -1   1    0   
$EndComp
$Comp
L Project:R R15
U 1 1 5C81E15C
P 4900 6800
F 0 "R15" V 4830 6800 50  0000 C CNN
F 1 "470" V 4970 6800 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 4900 6800 50  0001 C CNN
F 3 "" H 4900 6800 50  0000 C CNN
F 4 "Yageo" H 100 1450 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07470RL" H 100 1450 50  0001 C CNN "PartNumber"
	1    4900 6800
	0    -1   1    0   
$EndComp
Wire Wire Line
	5000 5600 5400 5600
Wire Wire Line
	5400 5600 5400 5800
Wire Wire Line
	5400 5600 5900 5600
Wire Wire Line
	5900 5600 5900 5800
Connection ~ 5400 5600
Wire Wire Line
	5900 5600 6400 5600
Wire Wire Line
	6400 5600 6400 5800
Connection ~ 5900 5600
Wire Wire Line
	5400 6200 4300 6200
Wire Wire Line
	5400 6200 5400 6000
Wire Wire Line
	5400 6200 5400 6400
Connection ~ 5400 6200
Wire Wire Line
	5400 6200 5900 6200
Wire Wire Line
	5900 6200 5900 6000
Wire Wire Line
	5900 6200 5900 6400
Connection ~ 5900 6200
Wire Wire Line
	5000 6800 5400 6800
Wire Wire Line
	5400 6800 5400 6600
Wire Wire Line
	5400 6800 5900 6800
Wire Wire Line
	5900 6800 5900 6600
Connection ~ 5400 6800
Wire Wire Line
	6400 6000 6400 7000
Wire Wire Line
	6400 7000 4700 7000
Wire Wire Line
	4700 7000 4700 6800
Wire Wire Line
	4700 6800 4800 6800
Wire Wire Line
	4700 6800 4300 6800
Connection ~ 4700 6800
Wire Wire Line
	4800 5600 4300 5600
Text Label 4300 5600 0    50   ~ 0
LED_A
Text Label 4300 6800 0    50   ~ 0
LED_B
Text Label 4300 6200 0    50   ~ 0
LED_C
Text Notes 4900 5200 0    50   ~ 0
with Charlieplexing
Text Label 4000 3600 2    50   ~ 0
LED_C
NoConn ~ 3500 4500
NoConn ~ 3500 4200
NoConn ~ 3500 4300
Wire Wire Line
	3500 3600 4000 3600
NoConn ~ 3500 4900
$Comp
L Connector:6P6C J?
U 1 1 5C81A4EF
P 6100 3800
AR Path="/5C812AC2/5C81A4EF" Ref="J?"  Part="1" 
AR Path="/58A68DCB/5C81A4EF" Ref="J7"  Part="1" 
F 0 "J7" H 5770 3804 50  0000 R CNN
F 1 "6P6C" H 5770 3895 50  0000 R CNN
F 2 "LibreSolar:RJ25_6P6C_TabUp" V 6100 3825 50  0001 C CNN
F 3 "" V 6100 3825 50  0001 C CNN
F 4 "Wurth Electronics" H 6100 3800 50  0001 C CNN "Manufacturer"
F 5 "615006138421" H 6100 3800 50  0001 C CNN "PartNumber"
F 6 "Alternative: Pulse E5566-Q0LK22-L" H -400 0   50  0001 C CNN "Remarks"
	1    6100 3800
	1    0    0    1   
$EndComp
$Comp
L power:+3.3V #PWR?
U 1 1 5C81A4F6
P 6200 2800
AR Path="/5C812AC2/5C81A4F6" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A4F6" Ref="#PWR019"  Part="1" 
F 0 "#PWR019" H 6200 2650 50  0001 C CNN
F 1 "+3.3V" H 6200 2940 50  0000 C CNN
F 2 "" H 6200 2800 50  0000 C CNN
F 3 "" H 6200 2800 50  0000 C CNN
	1    6200 2800
	-1   0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5C81A4FC
P 7300 4000
AR Path="/5C812AC2/5C81A4FC" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A4FC" Ref="#PWR021"  Part="1" 
F 0 "#PWR021" H 7300 3750 50  0001 C CNN
F 1 "GND" H 7300 3850 50  0000 C CNN
F 2 "" H 7300 4000 50  0000 C CNN
F 3 "" H 7300 4000 50  0000 C CNN
	1    7300 4000
	1    0    0    -1  
$EndComp
Wire Wire Line
	6500 3600 7200 3600
Text Label 7000 4000 2    50   ~ 0
TEMP_EXT
$Comp
L power:GND #PWR?
U 1 1 5C81A504
P 8800 6100
AR Path="/58E22D17/5C81A504" Ref="#PWR?"  Part="1" 
AR Path="/58A68DC9/5C81A504" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A504" Ref="#PWR035"  Part="1" 
AR Path="/5C812AC2/5C81A504" Ref="#PWR?"  Part="1" 
F 0 "#PWR035" H 8800 5850 50  0001 C CNN
F 1 "GND" H 8800 5950 50  0000 C CNN
F 2 "" H 8800 6100 50  0000 C CNN
F 3 "" H 8800 6100 50  0000 C CNN
	1    8800 6100
	-1   0    0    -1  
$EndComp
$Comp
L Project:C C?
U 1 1 5C81A50D
P 8800 5900
AR Path="/58E22D17/5C81A50D" Ref="C?"  Part="1" 
AR Path="/58A68DC9/5C81A50D" Ref="C?"  Part="1" 
AR Path="/58A68DCB/5C81A50D" Ref="C44"  Part="1" 
AR Path="/5C812AC2/5C81A50D" Ref="C?"  Part="1" 
F 0 "C44" H 8825 5975 50  0000 L CNN
F 1 "10n" H 8825 5825 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 8800 5700 50  0001 C CNN
F 3 "" H 8825 5975 50  0000 C CNN
F 4 "Murata" H 0   50  50  0001 C CNN "Manufacturer"
F 5 "GCM188R72A103KA37D" H -500 100 50  0001 C CNN "PartNumber"
	1    8800 5900
	1    0    0    -1  
$EndComp
$Comp
L Project:R R?
U 1 1 5C81A516
P 8000 5400
AR Path="/58E22D17/5C81A516" Ref="R?"  Part="1" 
AR Path="/58A68DC9/5C81A516" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A516" Ref="R19"  Part="1" 
AR Path="/5C812AC2/5C81A516" Ref="R?"  Part="1" 
F 0 "R19" V 7930 5400 50  0000 C CNN
F 1 "10k" V 8070 5400 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8000 5400 50  0001 C CNN
F 3 "" H 8000 5400 50  0000 C CNN
F 4 "Yageo" H -1300 200 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-0710KL" H -500 100 50  0001 C CNN "PartNumber"
	1    8000 5400
	1    0    0    -1  
$EndComp
$Comp
L LibreSolar:R_NTC RT?
U 1 1 5C81A51F
P 8000 5900
AR Path="/58E22D17/5C81A51F" Ref="RT?"  Part="1" 
AR Path="/58A68DC9/5C81A51F" Ref="RT?"  Part="1" 
AR Path="/58A68DCB/5C81A51F" Ref="RT1"  Part="1" 
AR Path="/5C812AC2/5C81A51F" Ref="RT?"  Part="1" 
F 0 "RT1" V 7850 5900 50  0000 C CNN
F 1 "10k NTC" V 8100 5900 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8000 5950 50  0001 C CNN
F 3 "" H 8000 5950 50  0001 C CNN
F 4 "Murata" H 8000 5900 50  0001 C CNN "Manufacturer"
F 5 "NCU18XH103E6SRB" H 8000 5900 50  0001 C CNN "PartNumber"
	1    8000 5900
	1    0    0    -1  
$EndComp
Wire Wire Line
	8800 6000 8800 6100
Wire Wire Line
	8800 5800 8800 5600
Wire Wire Line
	8000 5500 8000 5600
Connection ~ 8000 5600
Text Notes 9300 5650 0    100  ~ 0
Temperature\n(ext. or int.)
Text GLabel 8900 5600 2    50   Output ~ 0
T_BAT
Wire Wire Line
	8800 5600 8900 5600
Text Label 7350 5600 0    50   ~ 0
TEMP_EXT
Text Notes 9300 6100 0    50   ~ 0
Either internal SMD NTC on PCB or\nexternal sensor via 6P6C connector
Text Notes 7100 2600 0    100  ~ 0
LS.one interface
Wire Wire Line
	7300 3900 7300 4000
Wire Wire Line
	6500 4100 7000 4100
$Comp
L Project:C C?
U 1 1 5C81A535
P 6800 3100
AR Path="/5C812AC2/5C81A535" Ref="C?"  Part="1" 
AR Path="/58A68DCB/5C81A535" Ref="C24"  Part="1" 
F 0 "C24" H 6820 3170 50  0000 L CNN
F 1 "100n" H 6820 3030 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 6800 3100 50  0001 C CNN
F 3 "" H 6800 3100 50  0000 C CNN
F 4 "Yageo" H 5050 -2400 50  0001 C CNN "Manufacturer"
F 5 "CC0603KRX7R9BB104" H -500 0   50  0001 C CNN "PartNumber"
	1    6800 3100
	1    0    0    -1  
$EndComp
Wire Wire Line
	8000 6200 7300 6200
Text Label 7300 6200 0    50   ~ 0
TEMP_INT_PD
$Comp
L Project:R R?
U 1 1 5C81A541
P 7900 3300
AR Path="/5C812AC2/5C81A541" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A541" Ref="R18"  Part="1" 
F 0 "R18" V 7830 3300 50  0000 C CNN
F 1 "470" V 7970 3300 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 7900 3300 50  0001 C CNN
F 3 "" H 7900 3300 50  0000 C CNN
F 4 "Yageo" H 3100 -2050 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07470RL" H -500 0   50  0001 C CNN "PartNumber"
	1    7900 3300
	0    -1   1    0   
$EndComp
$Comp
L Project:R R?
U 1 1 5C81A54A
P 8100 3500
AR Path="/5C812AC2/5C81A54A" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A54A" Ref="R21"  Part="1" 
F 0 "R21" V 8030 3500 50  0000 C CNN
F 1 "470" V 8170 3500 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8100 3500 50  0001 C CNN
F 3 "" H 8100 3500 50  0000 C CNN
F 4 "Yageo" H 3300 -1850 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07470RL" H -500 0   50  0001 C CNN "PartNumber"
	1    8100 3500
	0    -1   1    0   
$EndComp
Wire Wire Line
	7300 3700 7300 3300
Wire Wire Line
	6500 3700 7300 3700
Wire Wire Line
	7400 3800 7400 3500
Wire Wire Line
	6500 3800 7400 3800
$Comp
L power:GND #PWR?
U 1 1 5C81A555
P 7700 4200
AR Path="/5C812AC2/5C81A555" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A555" Ref="#PWR022"  Part="1" 
F 0 "#PWR022" H 7700 3950 50  0001 C CNN
F 1 "GND" H 7700 4050 50  0000 C CNN
F 2 "" H 7700 4200 50  0000 C CNN
F 3 "" H 7700 4200 50  0000 C CNN
	1    7700 4200
	1    0    0    -1  
$EndComp
Wire Wire Line
	8000 3300 8200 3300
Wire Wire Line
	8200 3500 8900 3500
Text Label 8900 3500 2    50   ~ 0
USART1_TX
Text Label 8900 3300 2    50   ~ 0
USART1_RX
$Comp
L Project:R R?
U 1 1 5C81A561
P 8500 5600
AR Path="/5C812AC2/5C81A561" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A561" Ref="R34"  Part="1" 
F 0 "R34" V 8430 5600 50  0000 C CNN
F 1 "2.2k" V 8570 5600 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8500 5600 50  0001 C CNN
F 3 "" H 8500 5600 50  0000 C CNN
F 4 "Yageo" H 3700 250 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-072K2L" H -500 100 50  0001 C CNN "PartNumber"
	1    8500 5600
	0    -1   1    0   
$EndComp
Wire Wire Line
	8600 5600 8800 5600
Connection ~ 8800 5600
$Comp
L Project:R R?
U 1 1 5C81A56C
P 8200 3100
AR Path="/5C812AC2/5C81A56C" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A56C" Ref="R22"  Part="1" 
F 0 "R22" V 8130 3100 50  0000 C CNN
F 1 "100k" V 8270 3100 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8200 3100 50  0001 C CNN
F 3 "" H 8200 3100 50  0000 C CNN
F 4 "Yageo" H 3400 -2250 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07100KL" H -500 0   50  0001 C CNN "PartNumber"
	1    8200 3100
	1    0    0    -1  
$EndComp
$Comp
L power:VDDA #PWR?
U 1 1 5C81A573
P 8000 5200
AR Path="/5C812AC2/5C81A573" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A573" Ref="#PWR023"  Part="1" 
F 0 "#PWR023" H 8000 5050 50  0001 C CNN
F 1 "VDDA" H 8017 5373 50  0000 C CNN
F 2 "" H 8000 5200 50  0001 C CNN
F 3 "" H 8000 5200 50  0001 C CNN
	1    8000 5200
	1    0    0    -1  
$EndComp
$Comp
L Project:R_PTC RT?
U 1 1 5C81A57B
P 6500 2900
AR Path="/5C812AC2/5C81A57B" Ref="RT?"  Part="1" 
AR Path="/58A68DCB/5C81A57B" Ref="F2"  Part="1" 
F 0 "F2" V 6235 2900 50  0000 C CNN
F 1 "50mA" V 6326 2900 50  0000 C CNN
F 2 "LibreSolar:R_1206_3216" H 6500 2950 50  0001 C CNN
F 3 "" H 6500 2950 50  0001 C CNN
F 4 "Bel" H -400 0   50  0001 C CNN "Manufacturer"
F 5 "0ZCJ0005FF2E" H -400 0   50  0001 C CNN "PartNumber"
	1    6500 2900
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5C81A582
P 6800 3300
AR Path="/5C812AC2/5C81A582" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A582" Ref="#PWR020"  Part="1" 
F 0 "#PWR020" H 6800 3050 50  0001 C CNN
F 1 "GND" H 6800 3150 50  0000 C CNN
F 2 "" H 6800 3300 50  0000 C CNN
F 3 "" H 6800 3300 50  0000 C CNN
	1    6800 3300
	-1   0    0    -1  
$EndComp
Wire Wire Line
	7200 2900 7200 3600
$Comp
L Power_Protection:NUP4202 U?
U 1 1 5C81A58C
P 7700 3900
AR Path="/5C812AC2/5C81A58C" Ref="U?"  Part="1" 
AR Path="/58A68DCB/5C81A58C" Ref="U3"  Part="1" 
F 0 "U3" H 7930 3946 50  0000 L CNN
F 1 "D1213A-04SO" H 7930 3855 50  0000 L CNN
F 2 "LibreSolar:SOT-23-6" H 7750 3975 50  0001 C CNN
F 3 "" H 7750 3975 50  0001 C CNN
F 4 "Alternative: IP4220CZ6" H -400 0   50  0001 C CNN "Remarks"
F 5 "Diodes Inc." H -400 0   50  0001 C CNN "Manufacturer"
F 6 "D1213A-04SO" H -400 0   50  0001 C CNN "PartNumber"
	1    7700 3900
	1    0    0    -1  
$EndComp
Wire Wire Line
	7400 3500 7800 3500
Wire Wire Line
	7600 3300 7600 3700
Connection ~ 7600 3300
Wire Wire Line
	7800 3500 7800 3700
Connection ~ 7800 3500
Wire Wire Line
	7800 3500 8000 3500
Wire Wire Line
	7700 4100 7700 4200
Wire Wire Line
	7600 3300 7800 3300
Wire Wire Line
	7700 3700 7700 2900
Wire Wire Line
	6800 3000 6800 2900
Connection ~ 6800 2900
Wire Wire Line
	6800 2900 6600 2900
Wire Wire Line
	6400 2900 6200 2900
Wire Wire Line
	6200 2900 6200 2800
Wire Wire Line
	6800 3200 6800 3300
Wire Wire Line
	8000 5600 8400 5600
Wire Wire Line
	7600 4100 7600 4300
Wire Wire Line
	7600 4300 7300 4300
Wire Wire Line
	7100 4300 7100 4000
Wire Wire Line
	6500 4000 7100 4000
Wire Wire Line
	7300 4300 7300 5600
Wire Wire Line
	7300 5600 8000 5600
Connection ~ 7300 4300
Wire Wire Line
	7300 4300 7100 4300
$Comp
L Project:R R?
U 1 1 5C81A5AD
P 8200 4400
AR Path="/5C812AC2/5C81A5AD" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A5AD" Ref="R33"  Part="1" 
F 0 "R33" V 8130 4400 50  0000 C CNN
F 1 "2.2k" V 8270 4400 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 8200 4400 50  0001 C CNN
F 3 "" H 8200 4400 50  0000 C CNN
F 4 "Yageo" H 3400 -950 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-072K2L" H -500 0   50  0001 C CNN "PartNumber"
	1    8200 4400
	0    -1   1    0   
$EndComp
$Comp
L Project:C C?
U 1 1 5C81A5B6
P 8500 4600
AR Path="/5C812AC2/5C81A5B6" Ref="C?"  Part="1" 
AR Path="/58A68DCB/5C81A5B6" Ref="C43"  Part="1" 
F 0 "C43" H 8520 4670 50  0000 L CNN
F 1 "100n" H 8520 4530 50  0000 L CNN
F 2 "LibreSolar:C_0603_1608" H 8500 4600 50  0001 C CNN
F 3 "" H 8500 4600 50  0000 C CNN
F 4 "Yageo" H 6750 -900 50  0001 C CNN "Manufacturer"
F 5 "CC0603KRX7R9BB104" H -600 0   50  0001 C CNN "PartNumber"
	1    8500 4600
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5C81A5BD
P 8500 4800
AR Path="/5C812AC2/5C81A5BD" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A5BD" Ref="#PWR033"  Part="1" 
F 0 "#PWR033" H 8500 4550 50  0001 C CNN
F 1 "GND" H 8500 4650 50  0000 C CNN
F 2 "" H 8500 4800 50  0000 C CNN
F 3 "" H 8500 4800 50  0000 C CNN
	1    8500 4800
	1    0    0    -1  
$EndComp
Wire Wire Line
	8500 4700 8500 4800
Wire Wire Line
	8500 4500 8500 4400
Wire Wire Line
	8500 4400 8300 4400
Wire Wire Line
	7000 4400 7000 4100
Wire Wire Line
	7800 4100 7800 4400
Connection ~ 7800 4400
Wire Wire Line
	7800 4400 7000 4400
$Comp
L Project:R R?
U 1 1 5C81A5CC
P 9000 4600
AR Path="/5C812AC2/5C81A5CC" Ref="R?"  Part="1" 
AR Path="/58A68DCB/5C81A5CC" Ref="R35"  Part="1" 
F 0 "R35" V 8930 4600 50  0000 C CNN
F 1 "100k" V 9070 4600 50  0000 C CNN
F 2 "LibreSolar:R_0603_1608" H 9000 4600 50  0001 C CNN
F 3 "" H 9000 4600 50  0000 C CNN
F 4 "Yageo" H 4200 -750 50  0001 C CNN "Manufacturer"
F 5 "RC0603FR-07100KL" H -300 400 50  0001 C CNN "PartNumber"
	1    9000 4600
	-1   0    0    1   
$EndComp
Connection ~ 8500 4400
Text Label 9400 4150 2    50   ~ 0
BUTTON
Text Notes 7300 6400 0    50   ~ 0
Drive low if no ext. \nsensor detected
Wire Wire Line
	6500 3900 7300 3900
Text Notes 9000 3500 0    50   ~ 0
1k series resistor for\nUART tested, but does \nnot work with 115200 Bd
Wire Wire Line
	8000 5200 8000 5300
Wire Wire Line
	7200 2900 7700 2900
Wire Wire Line
	7300 3300 7600 3300
Connection ~ 7200 2900
Wire Wire Line
	7200 2900 6800 2900
Wire Wire Line
	7800 4400 8100 4400
$Comp
L power:+3.3V #PWR?
U 1 1 5C81A5E9
P 8200 2900
AR Path="/5C812AC2/5C81A5E9" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5C81A5E9" Ref="#PWR027"  Part="1" 
F 0 "#PWR027" H 8200 2750 50  0001 C CNN
F 1 "+3.3V" H 8200 3040 50  0000 C CNN
F 2 "" H 8200 2900 50  0000 C CNN
F 3 "" H 8200 2900 50  0000 C CNN
	1    8200 2900
	-1   0    0    -1  
$EndComp
Wire Wire Line
	8200 3200 8200 3300
Connection ~ 8200 3300
Wire Wire Line
	8200 3300 8900 3300
Wire Wire Line
	8200 2900 8200 3000
Wire Wire Line
	1850 1800 2300 1800
$Comp
L power:VDDA #PWR0112
U 1 1 5C872C5F
P 2700 1700
F 0 "#PWR0112" H 2700 1550 50  0001 C CNN
F 1 "VDDA" H 2717 1873 50  0000 C CNN
F 2 "" H 2700 1700 50  0001 C CNN
F 3 "" H 2700 1700 50  0001 C CNN
	1    2700 1700
	1    0    0    -1  
$EndComp
Wire Wire Line
	2700 1700 2700 1800
Connection ~ 2700 1800
Wire Wire Line
	3600 4400 3500 4400
Wire Wire Line
	2200 4200 1600 4200
Text Label 1600 4200 0    50   ~ 0
TEMP_INT_PD
Wire Wire Line
	3500 4600 4000 4600
Text Label 4000 4600 2    50   ~ 0
BUTTON
$Comp
L power:PWR_FLAG #FLG0101
U 1 1 5C9B1356
P 2300 1700
F 0 "#FLG0101" H 2300 1775 50  0001 C CNN
F 1 "PWR_FLAG" H 2300 1874 50  0000 C CNN
F 2 "" H 2300 1700 50  0001 C CNN
F 3 "~" H 2300 1700 50  0001 C CNN
	1    2300 1700
	1    0    0    -1  
$EndComp
Wire Wire Line
	2300 1700 2300 1800
Connection ~ 2300 1800
Wire Wire Line
	2300 1800 2700 1800
NoConn ~ 3500 2700
NoConn ~ 3500 2800
Wire Wire Line
	8000 5600 8000 5800
Wire Wire Line
	8000 6000 8000 6200
Wire Wire Line
	3500 3100 3600 3100
Text GLabel 3600 3200 2    50   Input ~ 0
5V_PG
Text GLabel 3600 3100 2    50   Output ~ 0
V_SOLAR_EN
Wire Wire Line
	3600 3200 3500 3200
Wire Wire Line
	8500 4400 8700 4400
Text Notes 9550 4850 0    50   ~ 0
BUTTON can trigger bootloader\nif pulled high before reset.\nDuration of high input on BOOT0:\n\ntau = R35 * C43\nV(t) = Vmax * (1-exp(-t/tau))\n--> t = -tau * ln(1-V/Vmax)\n\nV > 0.7 * VDD = 2.31V necessary\n--> t = 12 ms
$Comp
L power:GND #PWR?
U 1 1 5D0F3A65
P 9000 4800
AR Path="/5C812AC2/5D0F3A65" Ref="#PWR?"  Part="1" 
AR Path="/58A68DCB/5D0F3A65" Ref="#PWR0118"  Part="1" 
F 0 "#PWR0118" H 9000 4550 50  0001 C CNN
F 1 "GND" H 9000 4650 50  0000 C CNN
F 2 "" H 9000 4800 50  0000 C CNN
F 3 "" H 9000 4800 50  0000 C CNN
	1    9000 4800
	1    0    0    -1  
$EndComp
Text Label 9400 4400 2    50   ~ 0
BOOT0
Wire Wire Line
	9400 4150 9050 4150
Wire Wire Line
	8850 4150 8700 4150
Wire Wire Line
	8700 4150 8700 4400
Connection ~ 8700 4400
Wire Wire Line
	8700 4400 9000 4400
Wire Wire Line
	9000 4500 9000 4400
Connection ~ 9000 4400
Wire Wire Line
	9000 4400 9400 4400
Wire Wire Line
	9000 4800 9000 4700
Text Notes 8450 3000 0    50   ~ 0
Pull-up to provide defined RX\nsignal if port is unconnected
$EndSCHEMATC