EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Transistor_BJT:BC847 Q1
U 1 1 5FC67B72
P 3450 3300
F 0 "Q1" H 3641 3300 50  0000 L CNN
F 1 "BC847" H 3641 3255 50  0001 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 3650 3225 50  0001 L CIN
F 3 "http://www.infineon.com/dgdl/Infineon-BC847SERIES_BC848SERIES_BC849SERIES_BC850SERIES-DS-v01_01-en.pdf?fileId=db3a304314dca389011541d4630a1657" H 3450 3300 50  0001 L CNN
	1    3450 3300
	1    0    0    -1  
$EndComp
$Comp
L Device:R_Small R1
U 1 1 5FC6861A
P 3050 3300
F 0 "R1" V 3246 3300 50  0000 C CNN
F 1 "R_Small" V 3155 3300 50  0000 C CNN
F 2 "" H 3050 3300 50  0001 C CNN
F 3 "~" H 3050 3300 50  0001 C CNN
	1    3050 3300
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4750 3050 4600 3050
Wire Wire Line
	3550 2950 3550 3100
Wire Wire Line
	3150 3300 3250 3300
$Comp
L power:GND1 #PWR02
U 1 1 5FC74679
P 3550 3500
F 0 "#PWR02" H 3550 3250 50  0001 C CNN
F 1 "GND1" H 3555 3327 50  0000 C CNN
F 2 "" H 3550 3500 50  0001 C CNN
F 3 "" H 3550 3500 50  0001 C CNN
	1    3550 3500
	1    0    0    -1  
$EndComp
Wire Wire Line
	4750 3250 4650 3250
Wire Wire Line
	4600 3050 4600 2650
Wire Wire Line
	4600 2650 4900 2650
Connection ~ 4600 3050
Wire Wire Line
	4900 2300 4600 2300
Wire Wire Line
	4600 2300 4600 2650
Connection ~ 4600 2650
Text GLabel 9150 3350 2    50   Input ~ 0
RX_OUT
Text GLabel 2850 3300 0    50   Input ~ 0
TX_IN
Wire Wire Line
	2850 3300 2950 3300
$Comp
L power:+3V3 #PWR01
U 1 1 5FC80852
P 3550 2150
F 0 "#PWR01" H 3550 2000 50  0001 C CNN
F 1 "+3V3" H 3565 2323 50  0000 C CNN
F 2 "" H 3550 2150 50  0001 C CNN
F 3 "" H 3550 2150 50  0001 C CNN
	1    3550 2150
	1    0    0    -1  
$EndComp
$Comp
L Device:Opamp_Quad_Generic U1
U 4 1 5FC81BCB
P 5250 4650
F 0 "U1" H 5250 4375 50  0000 C CNN
F 1 "MCP6494" H 5250 4374 50  0001 C CNN
F 2 "" H 5250 4650 50  0001 C CNN
F 3 "~" H 5250 4650 50  0001 C CNN
	4    5250 4650
	1    0    0    1   
$EndComp
$Comp
L Device:R R2
U 1 1 5FC87551
P 3550 2400
F 0 "R2" H 3620 2400 50  0000 L CNN
F 1 "R" H 3620 2355 50  0001 L CNN
F 2 "" V 3480 2400 50  0001 C CNN
F 3 "~" H 3550 2400 50  0001 C CNN
	1    3550 2400
	1    0    0    -1  
$EndComp
$Comp
L Device:Opamp_Quad_Generic U1
U 2 1 5FC77130
P 7200 3250
F 0 "U1" H 7200 2975 50  0000 C CNN
F 1 "MCP6494" H 7200 2974 50  0001 C CNN
F 2 "" H 7200 3250 50  0001 C CNN
F 3 "~" H 7200 3250 50  0001 C CNN
	2    7200 3250
	1    0    0    1   
$EndComp
$Comp
L Device:Opamp_Quad_Generic U1
U 1 1 5FC6A2B7
P 5050 3150
F 0 "U1" H 5050 2783 50  0000 C CNN
F 1 "MCP6494" H 5050 2874 50  0000 C CNN
F 2 "" H 5050 3150 50  0001 C CNN
F 3 "~" H 5050 3150 50  0001 C CNN
	1    5050 3150
	1    0    0    1   
$EndComp
Wire Wire Line
	7500 3250 7600 3250
Wire Wire Line
	3550 2250 3550 2150
$Comp
L Device:D_ALT LED1
U 1 1 5FC90B25
P 3550 2800
F 0 "LED1" V 3550 3100 50  0000 R CNN
F 1 "D_ALT" V 3505 2720 50  0001 R CNN
F 2 "" H 3550 2800 50  0001 C CNN
F 3 "~" H 3550 2800 50  0001 C CNN
	1    3550 2800
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3550 2550 3550 2650
$Comp
L Device:D_ALT PD1
U 1 1 5FC93B60
P 4150 2800
F 0 "PD1" V 4150 2880 50  0000 L CNN
F 1 "D_ALT" V 4105 2720 50  0001 R CNN
F 2 "" H 4150 2800 50  0001 C CNN
F 3 "~" H 4150 2800 50  0001 C CNN
	1    4150 2800
	0    1    1    0   
$EndComp
Wire Wire Line
	4150 3050 4150 2950
Wire Wire Line
	4150 3050 4600 3050
$Comp
L Device:R R3
U 1 1 5FC9B279
P 4350 4500
F 0 "R3" H 4420 4500 50  0000 L CNN
F 1 "R" H 4420 4455 50  0001 L CNN
F 2 "" V 4280 4500 50  0001 C CNN
F 3 "~" H 4350 4500 50  0001 C CNN
	1    4350 4500
	1    0    0    -1  
$EndComp
$Comp
L Device:R R4
U 1 1 5FC9B8DC
P 4350 5000
F 0 "R4" H 4420 5000 50  0000 L CNN
F 1 "R" H 4420 4955 50  0001 L CNN
F 2 "" V 4280 5000 50  0001 C CNN
F 3 "~" H 4350 5000 50  0001 C CNN
	1    4350 5000
	1    0    0    -1  
$EndComp
$Comp
L Device:C C1
U 1 1 5FC9BF27
P 4650 5000
F 0 "C1" H 4765 5000 50  0000 L CNN
F 1 "C" H 4765 4955 50  0001 L CNN
F 2 "" H 4688 4850 50  0001 C CNN
F 3 "~" H 4650 5000 50  0001 C CNN
	1    4650 5000
	1    0    0    -1  
$EndComp
Wire Wire Line
	4350 4650 4350 4750
Wire Wire Line
	4350 4750 4650 4750
Wire Wire Line
	4650 4750 4650 4850
Connection ~ 4350 4750
Wire Wire Line
	4350 4750 4350 4850
$Comp
L power:GND2 #PWR05
U 1 1 5FC9F5E3
P 4350 5300
F 0 "#PWR05" H 4350 5050 50  0001 C CNN
F 1 "GND2" H 4355 5127 50  0000 C CNN
F 2 "" H 4350 5300 50  0001 C CNN
F 3 "" H 4350 5300 50  0001 C CNN
	1    4350 5300
	1    0    0    -1  
$EndComp
Wire Wire Line
	4350 5300 4350 5250
Wire Wire Line
	4650 5150 4650 5250
Wire Wire Line
	4650 5250 4350 5250
Connection ~ 4350 5250
Wire Wire Line
	4350 5250 4350 5150
$Comp
L power:+3V0 #PWR04
U 1 1 5FCA206B
P 4350 4250
F 0 "#PWR04" H 4350 4100 50  0001 C CNN
F 1 "+3V0" H 4365 4423 50  0000 C CNN
F 2 "" H 4350 4250 50  0001 C CNN
F 3 "" H 4350 4250 50  0001 C CNN
	1    4350 4250
	1    0    0    -1  
$EndComp
Wire Wire Line
	4350 4250 4350 4350
Wire Wire Line
	4950 4750 4650 4750
Connection ~ 4650 4750
Wire Wire Line
	4950 4550 4800 4550
Wire Wire Line
	4800 4550 4800 4150
Wire Wire Line
	4800 4150 5700 4150
Wire Wire Line
	5700 4150 5700 4650
Wire Wire Line
	5700 4650 5550 4650
Connection ~ 5700 4650
$Comp
L Device:R R5
U 1 1 5FCB3FD4
P 5050 2650
F 0 "R5" V 4843 2650 50  0000 C CNN
F 1 "100k" V 4934 2650 50  0000 C CNN
F 2 "" V 4980 2650 50  0001 C CNN
F 3 "~" H 5050 2650 50  0001 C CNN
	1    5050 2650
	0    1    1    0   
$EndComp
$Comp
L Device:C C2
U 1 1 5FCB45E4
P 5050 2300
F 0 "C2" V 5302 2300 50  0000 C CNN
F 1 "7p" V 5211 2300 50  0000 C CNN
F 2 "" H 5088 2150 50  0001 C CNN
F 3 "~" H 5050 2300 50  0001 C CNN
	1    5050 2300
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5200 2300 5500 2300
Wire Wire Line
	5500 2300 5500 2650
Wire Wire Line
	5500 3150 5350 3150
$Comp
L Device:R R6
U 1 1 5FCB92E2
P 6150 3150
F 0 "R6" V 5943 3150 50  0000 C CNN
F 1 "1k" V 6034 3150 50  0000 C CNN
F 2 "" V 6080 3150 50  0001 C CNN
F 3 "~" H 6150 3150 50  0001 C CNN
	1    6150 3150
	0    1    1    0   
$EndComp
$Comp
L Device:R R7
U 1 1 5FCB995A
P 7200 2700
F 0 "R7" V 6993 2700 50  0000 C CNN
F 1 "100k" V 7084 2700 50  0000 C CNN
F 2 "" V 7130 2700 50  0001 C CNN
F 3 "~" H 7200 2700 50  0001 C CNN
	1    7200 2700
	0    1    1    0   
$EndComp
Wire Wire Line
	5600 3150 5500 3150
Connection ~ 5500 3150
Wire Wire Line
	7350 2700 7600 2700
Wire Wire Line
	7600 2700 7600 3250
Wire Wire Line
	9150 3350 9050 3350
Wire Wire Line
	5200 2650 5500 2650
Connection ~ 5500 2650
Wire Wire Line
	5500 2650 5500 3150
$Comp
L power:+3V0 #PWR03
U 1 1 5FCC0528
P 4150 2150
F 0 "#PWR03" H 4150 2000 50  0001 C CNN
F 1 "+3V0" H 4165 2323 50  0000 C CNN
F 2 "" H 4150 2150 50  0001 C CNN
F 3 "" H 4150 2150 50  0001 C CNN
	1    4150 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	4150 2150 4150 2650
$Comp
L Graphic:SYM_Arrow_Normal #SYM1
U 1 1 5FCC452D
P 3850 2775
F 0 "#SYM1" H 3850 2835 50  0001 C CNN
F 1 "SYM_Arrow_Normal" H 3860 2725 50  0001 C CNN
F 2 "" H 3850 2775 50  0001 C CNN
F 3 "~" H 3850 2775 50  0001 C CNN
	1    3850 2775
	1    0    0    -1  
$EndComp
$Comp
L Graphic:SYM_Arrow_Normal #SYM2
U 1 1 5FCC5099
P 3850 2850
F 0 "#SYM2" H 3850 2910 50  0001 C CNN
F 1 "SYM_Arrow_Normal" H 3860 2800 50  0001 C CNN
F 2 "" H 3850 2850 50  0001 C CNN
F 3 "~" H 3850 2850 50  0001 C CNN
	1    3850 2850
	1    0    0    -1  
$EndComp
Wire Notes Line
	3200 3000 4450 3000
Wire Notes Line
	4450 3000 4450 2600
Wire Notes Line
	4450 2600 3200 2600
Wire Notes Line
	3200 2600 3200 3000
Text Notes 2900 2700 0    50   ~ 0
IR link
Wire Wire Line
	4650 3750 5950 3750
Wire Wire Line
	5950 4650 5950 3750
Wire Wire Line
	5700 4650 5950 4650
Wire Notes Line
	3850 1550 3850 5700
Text Notes 3750 1750 2    100  ~ 0
Stator
Text Notes 3950 1750 0    100  ~ 0
Rotor
Text Label 5650 3750 2    50   ~ 0
VGND
Text Notes 5300 1950 2    50   ~ 0
TIA G=100kΩ
Text Notes 7500 2350 2    50   ~ 0
Amplifier G=100
Text Notes 8950 2900 2    50   ~ 0
Comparator
Text Notes 5650 4000 2    50   ~ 0
Virtual Ground Buffer
$Comp
L Device:C C3
U 1 1 5FC76733
P 5750 3150
F 0 "C3" V 5900 3150 50  0000 C CNN
F 1 "7p" V 5911 3150 50  0001 C CNN
F 2 "" H 5788 3000 50  0001 C CNN
F 3 "~" H 5750 3150 50  0001 C CNN
	1    5750 3150
	0    1    1    0   
$EndComp
Wire Wire Line
	6650 3350 6650 3750
Wire Wire Line
	6650 3350 6900 3350
Connection ~ 6650 3750
$Comp
L Device:Opamp_Quad_Generic U1
U 3 1 5FC7A609
P 8750 3350
F 0 "U1" H 8750 3075 50  0000 C CNN
F 1 "MCP6494" H 8750 3074 50  0001 C CNN
F 2 "" H 8750 3350 50  0001 C CNN
F 3 "~" H 8750 3350 50  0001 C CNN
	3    8750 3350
	1    0    0    1   
$EndComp
$Comp
L Device:C C4
U 1 1 5FC8AF8D
P 7850 3250
F 0 "C4" V 8102 3250 50  0000 C CNN
F 1 "7p" V 8011 3250 50  0001 C CNN
F 2 "" H 7888 3100 50  0001 C CNN
F 3 "~" H 7850 3250 50  0001 C CNN
	1    7850 3250
	0    1    1    0   
$EndComp
$Comp
L Device:R R8
U 1 1 5FC9BACD
P 6400 3400
F 0 "R8" V 6300 3400 50  0000 C CNN
F 1 "1k" V 6284 3400 50  0001 C CNN
F 2 "" V 6330 3400 50  0001 C CNN
F 3 "~" H 6400 3400 50  0001 C CNN
	1    6400 3400
	-1   0    0    1   
$EndComp
Wire Wire Line
	5950 3750 6400 3750
Connection ~ 5950 3750
Wire Wire Line
	6400 3550 6400 3750
Connection ~ 6400 3750
Wire Wire Line
	6400 3750 6650 3750
Wire Wire Line
	6300 3150 6400 3150
Wire Wire Line
	6400 3250 6400 3150
Wire Wire Line
	6400 2700 7050 2700
Connection ~ 6400 3150
Wire Wire Line
	6400 3150 6900 3150
Wire Wire Line
	6400 3150 6400 2700
Wire Wire Line
	6000 3150 5900 3150
$Comp
L Device:R R9
U 1 1 5FCAEC24
P 8100 3500
F 0 "R9" V 8000 3500 50  0000 C CNN
F 1 "100k" V 7984 3500 50  0001 C CNN
F 2 "" V 8030 3500 50  0001 C CNN
F 3 "~" H 8100 3500 50  0001 C CNN
	1    8100 3500
	-1   0    0    1   
$EndComp
Wire Wire Line
	7600 3250 7700 3250
Connection ~ 7600 3250
Wire Wire Line
	8450 3450 8350 3450
Wire Wire Line
	8000 3250 8100 3250
Wire Wire Line
	6650 3750 8100 3750
Wire Wire Line
	8350 3450 8350 3750
Wire Wire Line
	8100 3350 8100 3250
Connection ~ 8100 3250
Wire Wire Line
	8100 3250 8450 3250
Connection ~ 8100 3750
Wire Wire Line
	8100 3750 8350 3750
Wire Wire Line
	8100 3650 8100 3750
Wire Wire Line
	4650 3250 4650 3750
Text Notes 5700 3750 0    50   ~ 0
1/2 VCC = 1.5V
$EndSCHEMATC