EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
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:myOpAmps
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 2
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L LM324DT U1
U 1 1 5946A8EE
P 5650 3325
AR Path="/5946A580/5946A8EE" Ref="U1"  Part="1" 
AR Path="/5946CB4D/5946A8EE" Ref="U2"  Part="1" 
F 0 "U1" H 6100 2525 60  0000 C CNN
F 1 "LM324DT" H 5300 2525 60  0000 C CNN
F 2 "SMD_Packages:SOIC-14_N" H 5650 3325 60  0001 C CNN
F 3 "http://www.farnell.com/datasheets/1834360.pdf" H 5650 3325 60  0001 C CNN
F 4 "2382609" H 5650 3325 60  0001 C CNN "Franell"
	1    5650 3325
	1    0    0    -1  
$EndComp
$Comp
L MMBT3904 Q4
U 1 1 5946A8F6
P 7675 4000
AR Path="/5946A580/5946A8F6" Ref="Q4"  Part="1" 
AR Path="/5946CB4D/5946A8F6" Ref="Q8"  Part="1" 
F 0 "Q4" H 7875 4075 50  0000 L CNN
F 1 "MMBT3904" H 7875 4000 50  0000 L CNN
F 2 "SOT-23" H 7875 3925 50  0001 L CIN
F 3 "http://www.nxp.com/packings/SOT23_215.html" H 7675 4000 50  0001 L CNN
F 4 "1757936" H 7675 4000 60  0001 C CNN "Farnell"
	1    7675 4000
	1    0    0    1   
$EndComp
Text HLabel 7900 4300 2    60   Input ~ 0
LED_NEG_3
Wire Wire Line
	7775 4200 7775 4300
Wire Wire Line
	7775 4300 7900 4300
Text GLabel 6775 3525 2    60   Input ~ 0
V_SIG
Wire Wire Line
	7775 3675 7775 3800
Wire Wire Line
	6350 3725 7775 3725
Connection ~ 7775 3725
Wire Wire Line
	6350 3925 7475 3925
Wire Wire Line
	7475 3925 7475 4000
Wire Wire Line
	6350 3525 6775 3525
$Comp
L MMBT3904 Q2
U 1 1 5946A90F
P 3625 4000
AR Path="/5946A580/5946A90F" Ref="Q2"  Part="1" 
AR Path="/5946CB4D/5946A90F" Ref="Q6"  Part="1" 
F 0 "Q2" H 3825 4075 50  0000 L CNN
F 1 "MMBT3904" H 3825 4000 50  0000 L CNN
F 2 "SOT-23" H 3825 3925 50  0001 L CIN
F 3 "http://www.nxp.com/packings/SOT23_215.html" H 3625 4000 50  0001 L CNN
F 4 "1757936" H 3625 4000 60  0001 C CNN "Farnell"
	1    3625 4000
	-1   0    0    1   
$EndComp
Text HLabel 3400 4300 0    60   Input ~ 0
LED_NEG_2
Wire Wire Line
	3525 4200 3525 4300
Wire Wire Line
	3525 4300 3400 4300
Text GLabel 4525 3525 0    60   Input ~ 0
V_SIG
Wire Wire Line
	3525 3675 3525 3800
Wire Wire Line
	4950 3725 3525 3725
Connection ~ 3525 3725
Wire Wire Line
	4950 3925 3825 3925
Wire Wire Line
	3825 3925 3825 4000
Wire Wire Line
	4950 3525 4525 3525
$Comp
L MMBT3904 Q1
U 1 1 5946A928
P 3625 2650
AR Path="/5946A580/5946A928" Ref="Q1"  Part="1" 
AR Path="/5946CB4D/5946A928" Ref="Q5"  Part="1" 
F 0 "Q1" H 3825 2725 50  0000 L CNN
F 1 "MMBT3904" H 3825 2650 50  0000 L CNN
F 2 "SOT-23" H 3825 2575 50  0001 L CIN
F 3 "http://www.nxp.com/packings/SOT23_215.html" H 3625 2650 50  0001 L CNN
F 4 "1757936" H 3625 2650 60  0001 C CNN "Farnell"
	1    3625 2650
	-1   0    0    -1  
$EndComp
Text HLabel 3400 2350 0    60   Input ~ 0
LED_NEG_1
Wire Wire Line
	3525 2450 3525 2350
Wire Wire Line
	3525 2350 3400 2350
Text GLabel 4525 3125 0    60   Input ~ 0
V_SIG
Wire Wire Line
	3525 2850 3525 2975
Wire Wire Line
	4950 2925 3525 2925
Connection ~ 3525 2925
Wire Wire Line
	4950 2725 3825 2725
Wire Wire Line
	3825 2725 3825 2650
Wire Wire Line
	4950 3125 4525 3125
$Comp
L MMBT3904 Q3
U 1 1 5946A941
P 7675 2650
AR Path="/5946A580/5946A941" Ref="Q3"  Part="1" 
AR Path="/5946CB4D/5946A941" Ref="Q7"  Part="1" 
F 0 "Q3" H 7875 2725 50  0000 L CNN
F 1 "MMBT3904" H 7875 2650 50  0000 L CNN
F 2 "SOT-23" H 7875 2575 50  0001 L CIN
F 3 "http://www.nxp.com/packings/SOT23_215.html" H 7675 2650 50  0001 L CNN
F 4 "1757936" H 7675 2650 60  0001 C CNN "Farnell"
	1    7675 2650
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 5946A948
P 7775 3125
AR Path="/5946A580/5946A948" Ref="R3"  Part="1" 
AR Path="/5946CB4D/5946A948" Ref="R7"  Part="1" 
F 0 "R3" V 7855 3125 50  0000 C CNN
F 1 "10R" V 7775 3125 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 7705 3125 50  0001 C CNN
F 3 "" H 7775 3125 50  0000 C CNN
F 4 "2447233" V 7775 3125 60  0001 C CNN "Farnell"
	1    7775 3125
	-1   0    0    1   
$EndComp
Text HLabel 7900 2350 2    60   Input ~ 0
LED_NEG_4
Wire Wire Line
	7775 2450 7775 2350
Wire Wire Line
	7775 2350 7900 2350
Text GLabel 6775 3125 2    60   Input ~ 0
V_SIG
Wire Wire Line
	7775 2850 7775 2975
Wire Wire Line
	6350 2925 7775 2925
Connection ~ 7775 2925
Wire Wire Line
	6350 2725 7475 2725
Wire Wire Line
	7475 2725 7475 2650
Wire Wire Line
	6350 3125 6775 3125
$Comp
L GND #PWR01
U 1 1 5946A959
P 8025 3325
AR Path="/5946A580/5946A959" Ref="#PWR01"  Part="1" 
AR Path="/5946CB4D/5946A959" Ref="#PWR05"  Part="1" 
F 0 "#PWR01" H 8025 3075 50  0001 C CNN
F 1 "GND" H 8025 3175 50  0000 C CNN
F 2 "" H 8025 3325 50  0000 C CNN
F 3 "" H 8025 3325 50  0000 C CNN
	1    8025 3325
	1    0    0    -1  
$EndComp
Wire Wire Line
	7775 3275 7775 3375
Wire Wire Line
	7775 3325 8025 3325
Connection ~ 7775 3325
$Comp
L GND #PWR02
U 1 1 5946A962
P 3275 3325
AR Path="/5946A580/5946A962" Ref="#PWR02"  Part="1" 
AR Path="/5946CB4D/5946A962" Ref="#PWR06"  Part="1" 
F 0 "#PWR02" H 3275 3075 50  0001 C CNN
F 1 "GND" H 3275 3175 50  0000 C CNN
F 2 "" H 3275 3325 50  0000 C CNN
F 3 "" H 3275 3325 50  0000 C CNN
	1    3275 3325
	1    0    0    -1  
$EndComp
Wire Wire Line
	3525 3275 3525 3375
Wire Wire Line
	3275 3325 3525 3325
Connection ~ 3525 3325
$Comp
L GND #PWR03
U 1 1 5946A96B
P 6425 3325
AR Path="/5946A580/5946A96B" Ref="#PWR03"  Part="1" 
AR Path="/5946CB4D/5946A96B" Ref="#PWR07"  Part="1" 
F 0 "#PWR03" H 6425 3075 50  0001 C CNN
F 1 "GND" H 6425 3175 50  0000 C CNN
F 2 "" H 6425 3325 50  0000 C CNN
F 3 "" H 6425 3325 50  0000 C CNN
	1    6425 3325
	1    0    0    -1  
$EndComp
Text GLabel 4875 3325 0    60   Input ~ 0
Vcc
Wire Wire Line
	4875 3325 4950 3325
Wire Wire Line
	6350 3325 6425 3325
$Comp
L R R4
U 1 1 5946AF96
P 7775 3525
AR Path="/5946A580/5946AF96" Ref="R4"  Part="1" 
AR Path="/5946CB4D/5946AF96" Ref="R8"  Part="1" 
F 0 "R4" V 7855 3525 50  0000 C CNN
F 1 "10R" V 7775 3525 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 7705 3525 50  0001 C CNN
F 3 "" H 7775 3525 50  0000 C CNN
F 4 "2447233" V 7775 3525 60  0001 C CNN "Farnell"
	1    7775 3525
	-1   0    0    1   
$EndComp
$Comp
L R R1
U 1 1 5946B03F
P 3525 3125
AR Path="/5946A580/5946B03F" Ref="R1"  Part="1" 
AR Path="/5946CB4D/5946B03F" Ref="R5"  Part="1" 
F 0 "R1" V 3605 3125 50  0000 C CNN
F 1 "10R" V 3525 3125 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 3455 3125 50  0001 C CNN
F 3 "" H 3525 3125 50  0000 C CNN
F 4 "2447233" V 3525 3125 60  0001 C CNN "Farnell"
	1    3525 3125
	-1   0    0    1   
$EndComp
$Comp
L R R2
U 1 1 5946B10D
P 3525 3525
AR Path="/5946A580/5946B10D" Ref="R2"  Part="1" 
AR Path="/5946CB4D/5946B10D" Ref="R6"  Part="1" 
F 0 "R2" V 3605 3525 50  0000 C CNN
F 1 "10R" V 3525 3525 50  0000 C CNN
F 2 "Resistors_SMD:R_0603" V 3455 3525 50  0001 C CNN
F 3 "" H 3525 3525 50  0000 C CNN
F 4 "2447233" V 3525 3525 60  0001 C CNN "Farnell"
	1    3525 3525
	-1   0    0    1   
$EndComp
$Comp
L C C1
U 1 1 5946B2F2
P 3450 1350
AR Path="/5946A580/5946B2F2" Ref="C1"  Part="1" 
AR Path="/5946CB4D/5946B2F2" Ref="C4"  Part="1" 
F 0 "C1" H 3475 1450 50  0000 L CNN
F 1 "1u" H 3475 1250 50  0000 L CNN
F 2 "Resistors_SMD:R_0603" H 3488 1200 50  0001 C CNN
F 3 "" H 3450 1350 50  0000 C CNN
F 4 "2496916" H 3450 1350 60  0001 C CNN "Farnell"
	1    3450 1350
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 5946B377
P 3775 1350
AR Path="/5946A580/5946B377" Ref="C2"  Part="1" 
AR Path="/5946CB4D/5946B377" Ref="C5"  Part="1" 
F 0 "C2" H 3800 1450 50  0000 L CNN
F 1 "100n" H 3800 1250 50  0000 L CNN
F 2 "Resistors_SMD:R_0603" H 3813 1200 50  0001 C CNN
F 3 "" H 3775 1350 50  0000 C CNN
F 4 "2496834" H 3775 1350 60  0001 C CNN "Farnell"
	1    3775 1350
	1    0    0    -1  
$EndComp
$Comp
L C C3
U 1 1 5946B3BE
P 4075 1350
AR Path="/5946A580/5946B3BE" Ref="C3"  Part="1" 
AR Path="/5946CB4D/5946B3BE" Ref="C6"  Part="1" 
F 0 "C3" H 4100 1450 50  0000 L CNN
F 1 "10n" H 4100 1250 50  0000 L CNN
F 2 "Resistors_SMD:R_0603" H 4113 1200 50  0001 C CNN
F 3 "" H 4075 1350 50  0000 C CNN
F 4 "1414609" H 4075 1350 60  0001 C CNN "Farnell"
	1    4075 1350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR04
U 1 1 5946B480
P 4075 1575
AR Path="/5946A580/5946B480" Ref="#PWR04"  Part="1" 
AR Path="/5946CB4D/5946B480" Ref="#PWR08"  Part="1" 
F 0 "#PWR04" H 4075 1325 50  0001 C CNN
F 1 "GND" H 4075 1425 50  0000 C CNN
F 2 "" H 4075 1575 50  0000 C CNN
F 3 "" H 4075 1575 50  0000 C CNN
	1    4075 1575
	1    0    0    -1  
$EndComp
Text GLabel 3075 1200 0    60   Input ~ 0
Vcc
Wire Wire Line
	3075 1200 4075 1200
Connection ~ 3450 1200
Connection ~ 3775 1200
Wire Wire Line
	3450 1500 4075 1500
Connection ~ 3775 1500
Connection ~ 4075 1500
Wire Wire Line
	4075 1500 4075 1575
Text Notes 2850 975  0    60   ~ 0
Place decoupling capacitors close to IC.
$EndSCHEMATC