EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 5 6
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Amplifier_Operational:LM358 U400
U 1 1 62527821
P 3350 3950
F 0 "U400" H 3350 4317 50  0000 C CNN
F 1 "TSX922/OPA2350" H 3350 4226 50  0000 C CNN
F 2 "Package_SO:SO-8_3.9x4.9mm_P1.27mm" H 3350 3950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm2904-n.pdf" H 3350 3950 50  0001 C CNN
	1    3350 3950
	1    0    0    1   
$EndComp
$Comp
L Amplifier_Operational:LM358 U400
U 3 1 62528341
P 3350 3950
F 0 "U400" H 3308 3996 50  0000 L CNN
F 1 "TSX922/OPA2350" H 3308 3905 50  0000 L CNN
F 2 "Package_SO:SO-8_3.9x4.9mm_P1.27mm" H 3350 3950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm2904-n.pdf" H 3350 3950 50  0001 C CNN
	3    3350 3950
	1    0    0    -1  
$EndComp
$Comp
L Device:R R400
U 1 1 6252AA40
P 2600 4050
F 0 "R400" V 2393 4050 50  0000 C CNN
F 1 "47k" V 2484 4050 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 2530 4050 50  0001 C CNN
F 3 "~" H 2600 4050 50  0001 C CNN
	1    2600 4050
	0    1    1    0   
$EndComp
Wire Wire Line
	3050 4050 2850 4050
$Comp
L Device:C C400
U 1 1 62530F17
P 2850 4300
F 0 "C400" H 2965 4346 50  0000 L CNN
F 1 "10uF" H 2965 4255 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder" H 2888 4150 50  0001 C CNN
F 3 "~" H 2850 4300 50  0001 C CNN
	1    2850 4300
	1    0    0    -1  
$EndComp
Wire Wire Line
	2850 4150 2850 4050
Connection ~ 2850 4050
Wire Wire Line
	2850 4050 2750 4050
Wire Wire Line
	2850 4450 2850 4500
$Comp
L power:GND #PWR0141
U 1 1 6253577E
P 2850 4550
F 0 "#PWR0141" H 2850 4300 50  0001 C CNN
F 1 "GND" H 2855 4377 50  0000 C CNN
F 2 "" H 2850 4550 50  0001 C CNN
F 3 "" H 2850 4550 50  0001 C CNN
	1    2850 4550
	1    0    0    -1  
$EndComp
Wire Wire Line
	2450 4050 2400 4050
Wire Wire Line
	2850 4500 3250 4500
Wire Wire Line
	3250 4500 3250 4250
Connection ~ 2850 4500
Wire Wire Line
	2850 4500 2850 4550
$Comp
L power:VBUS #PWR0142
U 1 1 62541FB6
P 3250 3550
F 0 "#PWR0142" H 3250 3400 50  0001 C CNN
F 1 "VBUS" H 3265 3723 50  0000 C CNN
F 2 "" H 3250 3550 50  0001 C CNN
F 3 "" H 3250 3550 50  0001 C CNN
	1    3250 3550
	1    0    0    -1  
$EndComp
Wire Wire Line
	3250 3650 3250 3550
Wire Wire Line
	3050 3850 2950 3850
Wire Wire Line
	2950 3850 2950 3300
Wire Wire Line
	2950 3300 3750 3300
Wire Wire Line
	3750 3300 3750 3950
Wire Wire Line
	3750 3950 3650 3950
Connection ~ 3750 3950
Text GLabel 5300 2600 1    50   Input ~ 0
Vdcflt
$Comp
L Device:R R401
U 1 1 625474BB
P 5300 2950
F 0 "R401" H 5370 2996 50  0000 L CNN
F 1 "10k" H 5370 2905 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 5230 2950 50  0001 C CNN
F 3 "~" H 5300 2950 50  0001 C CNN
	1    5300 2950
	1    0    0    -1  
$EndComp
$Comp
L Device:R R402
U 1 1 62547F7D
P 5300 3350
F 0 "R402" H 5370 3396 50  0000 L CNN
F 1 "10k" H 5370 3305 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 5230 3350 50  0001 C CNN
F 3 "~" H 5300 3350 50  0001 C CNN
	1    5300 3350
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0143
U 1 1 6254865E
P 5300 3550
F 0 "#PWR0143" H 5300 3300 50  0001 C CNN
F 1 "GND" H 5305 3377 50  0000 C CNN
F 2 "" H 5300 3550 50  0001 C CNN
F 3 "" H 5300 3550 50  0001 C CNN
	1    5300 3550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5300 3550 5300 3500
Text GLabel 5450 3150 2    50   Input ~ 0
ADC0
Wire Wire Line
	5450 3150 5300 3150
$Comp
L misc-mcus:DS1803 U401
U 1 1 6255530A
P 6650 4200
F 0 "U401" H 6650 4200 50  0000 C CNN
F 1 "DS1803" H 6650 4750 50  0000 C CNN
F 2 "Package_SO:TSSOP-14_4.4x5mm_P0.65mm" H 6850 3550 50  0001 C CNN
F 3 "" H 6250 4100 50  0001 C CNN
	1    6650 4200
	1    0    0    -1  
$EndComp
Text GLabel 7150 4500 2    50   Input ~ 0
DPOT_LO
Text GLabel 7150 4400 2    50   Input ~ 0
DPOT_W
Text GLabel 7150 4300 2    50   Input ~ 0
DPOT_HI
Wire Wire Line
	7150 4300 7050 4300
Wire Wire Line
	7050 4400 7150 4400
Wire Wire Line
	7150 4500 7050 4500
$Comp
L power:+3V3 #PWR0144
U 1 1 62571F0D
P 4850 5050
F 0 "#PWR0144" H 4850 4900 50  0001 C CNN
F 1 "+3V3" H 4865 5223 50  0000 C CNN
F 2 "" H 4850 5050 50  0001 C CNN
F 3 "" H 4850 5050 50  0001 C CNN
	1    4850 5050
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0145
U 1 1 6257376C
P 6650 4900
F 0 "#PWR0145" H 6650 4650 50  0001 C CNN
F 1 "GND" H 6655 4727 50  0000 C CNN
F 2 "" H 6650 4900 50  0001 C CNN
F 3 "" H 6650 4900 50  0001 C CNN
	1    6650 4900
	1    0    0    -1  
$EndComp
Wire Wire Line
	6650 4700 6650 4800
Wire Wire Line
	6650 4800 6650 4900
Wire Wire Line
	7050 3900 7200 3900
Wire Wire Line
	7050 4100 7650 4100
Wire Wire Line
	7650 4100 7650 4250
$Comp
L power:GND #PWR0146
U 1 1 6257D4F0
P 7650 4250
F 0 "#PWR0146" H 7650 4000 50  0001 C CNN
F 1 "GND" H 7655 4077 50  0000 C CNN
F 2 "" H 7650 4250 50  0001 C CNN
F 3 "" H 7650 4250 50  0001 C CNN
	1    7650 4250
	1    0    0    -1  
$EndComp
Text GLabel 8850 3900 2    50   Input ~ 0
Vdclo
Wire Wire Line
	7050 4000 7800 4000
Text GLabel 5650 3850 0    50   Input ~ 0
DPOT_CLK
Text GLabel 5650 4150 0    50   Input ~ 0
DPOT_DAT
Wire Wire Line
	6150 4050 6250 4050
Wire Wire Line
	4850 5050 4850 5200
$Comp
L power:VBUS #PWR0147
U 1 1 6258CDD8
P 6650 3450
F 0 "#PWR0147" H 6650 3300 50  0001 C CNN
F 1 "VBUS" H 6665 3623 50  0000 C CNN
F 2 "" H 6650 3450 50  0001 C CNN
F 3 "" H 6650 3450 50  0001 C CNN
	1    6650 3450
	1    0    0    -1  
$EndComp
Wire Wire Line
	6650 3700 6650 3450
Wire Wire Line
	6150 4800 6150 4500
Wire Wire Line
	6150 4500 6250 4500
Wire Wire Line
	6250 4400 6150 4400
Wire Wire Line
	6150 4400 6150 4500
Connection ~ 6150 4500
Wire Wire Line
	6250 4300 6150 4300
Wire Wire Line
	6150 4300 6150 4400
Connection ~ 6150 4400
$Comp
L Device:R R403
U 1 1 625A082E
P 7800 4250
F 0 "R403" H 7870 4296 50  0000 L CNN
F 1 "10k" H 7870 4205 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 7730 4250 50  0001 C CNN
F 3 "~" H 7800 4250 50  0001 C CNN
	1    7800 4250
	1    0    0    -1  
$EndComp
$Comp
L Device:R R404
U 1 1 625A0834
P 7800 4750
F 0 "R404" H 7870 4796 50  0000 L CNN
F 1 "10k" H 7870 4705 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 7730 4750 50  0001 C CNN
F 3 "~" H 7800 4750 50  0001 C CNN
	1    7800 4750
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0148
U 1 1 625A083A
P 7800 5050
F 0 "#PWR0148" H 7800 4800 50  0001 C CNN
F 1 "GND" H 7805 4877 50  0000 C CNN
F 2 "" H 7800 5050 50  0001 C CNN
F 3 "" H 7800 5050 50  0001 C CNN
	1    7800 5050
	1    0    0    -1  
$EndComp
Wire Wire Line
	7800 5050 7800 4900
Wire Wire Line
	7800 4600 7800 4500
Wire Wire Line
	7800 4100 7800 4000
Text GLabel 7950 4500 2    50   Input ~ 0
ADC1
Wire Wire Line
	7950 4500 7800 4500
Connection ~ 7800 4500
Wire Wire Line
	7800 4500 7800 4400
Connection ~ 7800 4000
Wire Wire Line
	7800 4000 7950 4000
Text Notes 2650 3200 0    50   ~ 0
Use a (shitty) active RC filter to\nfilter out ripple (or PWM signal)\nfrom the unfiltered DCDC output
$Comp
L misc-mcus:Jumper_4 JP400
U 1 1 6267A25D
P 4700 2750
F 0 "JP400" H 4600 3000 50  0000 L CNN
F 1 "Jumper_4" V 4700 2600 50  0000 L CNN
F 2 "chip-bo:Jumper4_PinHeader" H 4700 2750 50  0001 C CNN
F 3 "~" H 4700 2750 50  0001 C CNN
	1    4700 2750
	1    0    0    -1  
$EndComp
Text GLabel 2250 2800 0    50   Input ~ 0
Vdcraw
Wire Wire Line
	7200 2750 7200 3900
Wire Wire Line
	4900 2750 5300 2750
Wire Wire Line
	3750 3950 4400 3950
Wire Wire Line
	5300 2800 5300 2750
Connection ~ 5300 2750
Wire Wire Line
	5300 2750 7200 2750
Wire Wire Line
	5300 2750 5300 2600
Text Notes 1500 2650 0    50   ~ 0
Use filtered or raw DCDC output\ndepending on PSU used: use raw\nif using PSU4 (LDO), otherwise\nuse filtered.
Wire Wire Line
	4400 3950 4400 2900
Wire Wire Line
	4400 2900 4500 2900
Wire Wire Line
	2250 2800 2400 2800
Wire Wire Line
	2400 4050 2400 2800
Connection ~ 2400 2800
Wire Wire Line
	2400 2800 4500 2800
$Comp
L power:+3V3 #PWR0108
U 1 1 62BDA8CE
P 4150 2450
F 0 "#PWR0108" H 4150 2300 50  0001 C CNN
F 1 "+3V3" H 4165 2623 50  0000 C CNN
F 2 "" H 4150 2450 50  0001 C CNN
F 3 "" H 4150 2450 50  0001 C CNN
	1    4150 2450
	1    0    0    -1  
$EndComp
$Comp
L power:VBUS #PWR0109
U 1 1 62BDB43F
P 4400 2450
F 0 "#PWR0109" H 4400 2300 50  0001 C CNN
F 1 "VBUS" H 4415 2623 50  0000 C CNN
F 2 "" H 4400 2450 50  0001 C CNN
F 3 "" H 4400 2450 50  0001 C CNN
	1    4400 2450
	1    0    0    -1  
$EndComp
Wire Wire Line
	4400 2600 4400 2450
Wire Wire Line
	4400 2600 4500 2600
Wire Wire Line
	4150 2700 4150 2450
Wire Wire Line
	4150 2700 4500 2700
Connection ~ 6650 4800
Wire Wire Line
	6150 4800 6650 4800
Connection ~ 5300 3150
Wire Wire Line
	5300 3150 5300 3100
Wire Wire Line
	5300 3150 5300 3200
$Comp
L Device:R R405
U 1 1 61C66FCB
P 4850 5800
F 0 "R405" V 4643 5800 50  0000 C CNN
F 1 "100" V 4734 5800 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder" V 4780 5800 50  0001 C CNN
F 3 "~" H 4850 5800 50  0001 C CNN
	1    4850 5800
	0    1    1    0   
$EndComp
$Comp
L Device:R R406
U 1 1 61C67CF4
P 4850 6100
F 0 "R406" V 4643 6100 50  0000 C CNN
F 1 "100" V 4734 6100 50  0000 C CNN
F 2 "Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder" V 4780 6100 50  0001 C CNN
F 3 "~" H 4850 6100 50  0001 C CNN
	1    4850 6100
	0    1    1    0   
$EndComp
Wire Wire Line
	5000 5800 5100 5800
Wire Wire Line
	6150 3850 6150 3950
Wire Wire Line
	6150 3950 6250 3950
Wire Wire Line
	5000 6100 5050 6100
Wire Wire Line
	6150 4150 6150 4050
Wire Wire Line
	4700 5800 4650 5800
Wire Wire Line
	4650 5800 4600 5800
$Comp
L Device:R R407
U 1 1 61C7D223
P 4650 5450
F 0 "R407" H 4720 5496 50  0000 L CNN
F 1 "1k" H 4720 5405 50  0000 L CNN
F 2 "Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder" V 4580 5450 50  0001 C CNN
F 3 "~" H 4650 5450 50  0001 C CNN
	1    4650 5450
	1    0    0    -1  
$EndComp
$Comp
L Device:R R408
U 1 1 61C81FCC
P 5050 5450
F 0 "R408" H 5120 5496 50  0000 L CNN
F 1 "1k" H 5120 5405 50  0000 L CNN
F 2 "Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder" V 4980 5450 50  0001 C CNN
F 3 "~" H 5050 5450 50  0001 C CNN
	1    5050 5450
	1    0    0    -1  
$EndComp
Wire Wire Line
	4650 5600 4650 5800
Connection ~ 4650 5800
Wire Wire Line
	5050 5600 5050 6100
Connection ~ 5050 6100
Wire Wire Line
	5050 6100 5100 6100
Wire Wire Line
	5050 5300 5050 5200
Wire Wire Line
	5050 5200 4850 5200
Connection ~ 4850 5200
Wire Wire Line
	4650 5300 4650 5200
Wire Wire Line
	4650 5200 4850 5200
Wire Wire Line
	4600 6100 4700 6100
$Comp
L Device:D_Zener D400
U 1 1 61CACB41
P 4650 6300
F 0 "D400" V 4604 6380 50  0000 L CNN
F 1 "BZX84C3V6" V 4695 6380 50  0000 L CNN
F 2 "Diode_SMD:D_SOT-23_ANK" H 4650 6300 50  0001 C CNN
F 3 "https://www.farnell.com/datasheets/1911825.pdf" H 4650 6300 50  0001 C CNN
	1    4650 6300
	0    1    1    0   
$EndComp
Wire Wire Line
	4650 6150 4650 5800
$Comp
L Device:D_Zener D401
U 1 1 61CB1638
P 4900 6600
F 0 "D401" V 4854 6680 50  0000 L CNN
F 1 "BZX84C3V6" V 4945 6680 50  0000 L CNN
F 2 "Diode_SMD:D_SOT-23_ANK" H 4900 6600 50  0001 C CNN
F 3 "https://www.farnell.com/datasheets/1911825.pdf" H 4900 6600 50  0001 C CNN
	1    4900 6600
	0    1    1    0   
$EndComp
Wire Wire Line
	4900 6450 4900 6200
Wire Wire Line
	4900 6200 5050 6200
Wire Wire Line
	5050 6200 5050 6100
Wire Wire Line
	4650 6450 4650 6850
Wire Wire Line
	4900 6750 4900 6850
$Comp
L power:GND #PWR0155
U 1 1 61CBB83C
P 4800 7000
F 0 "#PWR0155" H 4800 6750 50  0001 C CNN
F 1 "GND" H 4805 6827 50  0000 C CNN
F 2 "" H 4800 7000 50  0001 C CNN
F 3 "" H 4800 7000 50  0001 C CNN
	1    4800 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	4650 6850 4800 6850
Wire Wire Line
	4800 6850 4800 7000
Wire Wire Line
	4900 6850 4800 6850
Connection ~ 4800 6850
NoConn ~ 4600 5800
NoConn ~ 4600 6100
NoConn ~ 5100 6100
NoConn ~ 5100 5800
Wire Wire Line
	6150 3850 5650 3850
Wire Wire Line
	5650 4150 6150 4150
$Comp
L Amplifier_Operational:LM358 U400
U 2 1 61CFDCFB
P 8250 3900
F 0 "U400" H 8250 3533 50  0000 C CNN
F 1 "TSX922/OPA2350" H 8250 3624 50  0000 C CNN
F 2 "Package_SO:SO-8_3.9x4.9mm_P1.27mm" H 8250 3900 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm2904-n.pdf" H 8250 3900 50  0001 C CNN
	2    8250 3900
	1    0    0    1   
$EndComp
Wire Wire Line
	8550 3900 8700 3900
Wire Wire Line
	8700 3900 8700 3450
Wire Wire Line
	8700 3450 7800 3450
Wire Wire Line
	7800 3450 7800 3800
Wire Wire Line
	7800 3800 7950 3800
Wire Wire Line
	8700 3900 8850 3900
Connection ~ 8700 3900
Text Notes 5250 5900 0    50   ~ 0
I2C protection circuit\nprobably not needed
$EndSCHEMATC