EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 4
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Timer:ICM7556 U?
U 1 1 5FFB665B
P 5900 3050
F 0 "U?" H 6050 3500 50  0000 C CNN
F 1 "ICM7556" H 6150 3400 50  0000 C CNN
F 2 "" H 5900 3050 50  0001 C CNN
F 3 "http://www.intersil.com/content/dam/Intersil/documents/icm7/icm7555-56.pdf" H 5900 3050 50  0001 C CNN
	1    5900 3050
	1    0    0    -1  
$EndComp
$Comp
L Device:R R?
U 1 1 5FFB8488
P 2100 2450
F 0 "R?" V 2000 2350 50  0000 L CNN
F 1 "10k" V 2200 2350 50  0000 L CNN
F 2 "" V 2030 2450 50  0001 C CNN
F 3 "~" H 2100 2450 50  0001 C CNN
	1    2100 2450
	0    1    1    0   
$EndComp
$Comp
L Device:C C?
U 1 1 5FFB88E5
P 3900 3050
F 0 "C?" V 3750 3000 50  0000 L CNN
F 1 "10n" V 4050 3000 50  0000 L CNN
F 2 "" H 3938 2900 50  0001 C CNN
F 3 "~" H 3900 3050 50  0001 C CNN
	1    3900 3050
	0    1    1    0   
$EndComp
$Comp
L power:+12V #PWR?
U 1 1 5FF1DD4D
P 2350 2150
F 0 "#PWR?" H 2350 2000 50  0001 C CNN
F 1 "+12V" H 2365 2323 50  0000 C CNN
F 2 "" H 2350 2150 50  0001 C CNN
F 3 "" H 2350 2150 50  0001 C CNN
	1    2350 2150
	1    0    0    -1  
$EndComp
$Comp
L power:-12V #PWR?
U 1 1 5FF1E38D
P 5600 4250
F 0 "#PWR?" H 5600 4350 50  0001 C CNN
F 1 "-12V" H 5615 4423 50  0000 C CNN
F 2 "" H 5600 4250 50  0001 C CNN
F 3 "" H 5600 4250 50  0001 C CNN
	1    5600 4250
	-1   0    0    1   
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5FF1E961
P 5900 3550
F 0 "#PWR?" H 5900 3300 50  0001 C CNN
F 1 "GND" H 5905 3377 50  0000 C CNN
F 2 "" H 5900 3550 50  0001 C CNN
F 3 "" H 5900 3550 50  0001 C CNN
	1    5900 3550
	1    0    0    -1  
$EndComp
$Comp
L Device:R R?
U 1 1 5FF1FFAB
P 2100 2750
F 0 "R?" V 2000 2650 50  0000 L CNN
F 1 "47k" V 2200 2650 50  0000 L CNN
F 2 "" V 2030 2750 50  0001 C CNN
F 3 "~" H 2100 2750 50  0001 C CNN
	1    2100 2750
	0    1    1    0   
$EndComp
$Comp
L Device:R R?
U 1 1 5FF20993
P 2250 3100
F 0 "R?" V 2150 3000 50  0000 L CNN
F 1 "1M" V 2350 3000 50  0000 L CNN
F 2 "" V 2180 3100 50  0001 C CNN
F 3 "~" H 2250 3100 50  0001 C CNN
	1    2250 3100
	0    1    1    0   
$EndComp
$Comp
L Device:R R?
U 1 1 5FF20D76
P 1850 3400
F 0 "R?" V 1950 3400 50  0000 L CNN
F 1 "1.2M" V 1750 3300 50  0000 L CNN
F 2 "" V 1780 3400 50  0001 C CNN
F 3 "~" H 1850 3400 50  0001 C CNN
	1    1850 3400
	-1   0    0    1   
$EndComp
$Comp
L Diode:1N4148WS D?
U 1 1 5FF2192D
P 2550 3350
F 0 "D?" H 2550 3250 50  0000 L CNN
F 1 "1N4148WS" H 2350 3450 50  0000 L CNN
F 2 "Diode_SMD:D_SOD-323" H 2550 3175 50  0001 C CNN
F 3 "https://www.vishay.com/docs/85751/1n4148ws.pdf" H 2550 3350 50  0001 C CNN
	1    2550 3350
	0    1    1    0   
$EndComp
$Comp
L Device:R R?
U 1 1 5FF238C0
P 2950 2600
F 0 "R?" V 3050 2600 50  0000 L CNN
F 1 "22k" V 2850 2550 50  0000 L CNN
F 2 "" V 2880 2600 50  0001 C CNN
F 3 "~" H 2950 2600 50  0001 C CNN
	1    2950 2600
	-1   0    0    1   
$EndComp
$Comp
L Device:R R?
U 1 1 5FF23D20
P 3500 2600
F 0 "R?" V 3600 2600 50  0000 L CNN
F 1 "22k" V 3400 2550 50  0000 L CNN
F 2 "" V 3430 2600 50  0001 C CNN
F 3 "~" H 3500 2600 50  0001 C CNN
	1    3500 2600
	-1   0    0    1   
$EndComp
Text HLabel 1600 2450 0    50   Input ~ 0
SW_IN
Text HLabel 1600 2750 0    50   Input ~ 0
SW_IN_RET
Text HLabel 1600 3100 0    50   Input ~ 0
GATE_IN
Wire Wire Line
	2250 2450 2350 2450
Wire Wire Line
	2350 2450 2350 2150
Wire Wire Line
	1600 2750 1950 2750
Wire Wire Line
	1600 2450 1950 2450
Wire Wire Line
	1600 3100 1850 3100
Wire Wire Line
	1850 3100 1850 3250
Wire Wire Line
	2100 3100 1850 3100
Connection ~ 1850 3100
Wire Wire Line
	2250 2750 2500 2750
Wire Wire Line
	2500 2750 2500 3100
Wire Wire Line
	2500 3100 2400 3100
Wire Wire Line
	2500 3100 2550 3100
Wire Wire Line
	2550 3100 2550 3200
Connection ~ 2500 3100
$Comp
L Device:R R?
U 1 1 5FF2869C
P 3250 3650
F 0 "R?" V 3350 3650 50  0000 L CNN
F 1 "10R" V 3150 3600 50  0000 L CNN
F 2 "" V 3180 3650 50  0001 C CNN
F 3 "~" H 3250 3650 50  0001 C CNN
	1    3250 3650
	-1   0    0    1   
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5FF28FC7
P 1850 3650
F 0 "#PWR?" H 1850 3400 50  0001 C CNN
F 1 "GND" H 1855 3477 50  0000 C CNN
F 2 "" H 1850 3650 50  0001 C CNN
F 3 "" H 1850 3650 50  0001 C CNN
	1    1850 3650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5FF29880
P 2550 3650
F 0 "#PWR?" H 2550 3400 50  0001 C CNN
F 1 "GND" H 2555 3477 50  0000 C CNN
F 2 "" H 2550 3650 50  0001 C CNN
F 3 "" H 2550 3650 50  0001 C CNN
	1    2550 3650
	1    0    0    -1  
$EndComp
Wire Wire Line
	1850 3650 1850 3550
Wire Wire Line
	2550 3650 2550 3500
$Comp
L power:GND #PWR?
U 1 1 5FF2A52F
P 3250 3900
F 0 "#PWR?" H 3250 3650 50  0001 C CNN
F 1 "GND" H 3255 3727 50  0000 C CNN
F 2 "" H 3250 3900 50  0001 C CNN
F 3 "" H 3250 3900 50  0001 C CNN
	1    3250 3900
	1    0    0    -1  
$EndComp
Wire Wire Line
	3250 3900 3250 3800
$Comp
L power:+12V #PWR?
U 1 1 5FF2EAC4
P 2950 2150
F 0 "#PWR?" H 2950 2000 50  0001 C CNN
F 1 "+12V" H 2965 2323 50  0000 C CNN
F 2 "" H 2950 2150 50  0001 C CNN
F 3 "" H 2950 2150 50  0001 C CNN
	1    2950 2150
	1    0    0    -1  
$EndComp
$Comp
L power:+12V #PWR?
U 1 1 5FF2F0A9
P 3500 2150
F 0 "#PWR?" H 3500 2000 50  0001 C CNN
F 1 "+12V" H 3515 2323 50  0000 C CNN
F 2 "" H 3500 2150 50  0001 C CNN
F 3 "" H 3500 2150 50  0001 C CNN
	1    3500 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	2950 2450 2950 2150
Wire Wire Line
	3500 2450 3500 2150
$Comp
L Device:R R?
U 1 1 5FF2FC8E
P 4250 3400
F 0 "R?" V 4350 3400 50  0000 L CNN
F 1 "22k" V 4150 3350 50  0000 L CNN
F 2 "" V 4180 3400 50  0001 C CNN
F 3 "~" H 4250 3400 50  0001 C CNN
	1    4250 3400
	-1   0    0    1   
$EndComp
Wire Wire Line
	4050 3050 4250 3050
Wire Wire Line
	4250 3050 4250 3250
$Comp
L power:GND #PWR?
U 1 1 5FF304DF
P 4250 3900
F 0 "#PWR?" H 4250 3650 50  0001 C CNN
F 1 "GND" H 4255 3727 50  0000 C CNN
F 2 "" H 4250 3900 50  0001 C CNN
F 3 "" H 4250 3900 50  0001 C CNN
	1    4250 3900
	1    0    0    -1  
$EndComp
Wire Wire Line
	4250 3550 4250 3900
$Comp
L power:GND #PWR?
U 1 1 5FF311D4
P 4650 3900
F 0 "#PWR?" H 4650 3650 50  0001 C CNN
F 1 "GND" H 4655 3727 50  0000 C CNN
F 2 "" H 4650 3900 50  0001 C CNN
F 3 "" H 4650 3900 50  0001 C CNN
	1    4650 3900
	1    0    0    -1  
$EndComp
$Comp
L Device:R R?
U 1 1 5FF3155F
P 4650 2600
F 0 "R?" V 4750 2600 50  0000 L CNN
F 1 "22k" V 4550 2550 50  0000 L CNN
F 2 "" V 4580 2600 50  0001 C CNN
F 3 "~" H 4650 2600 50  0001 C CNN
	1    4650 2600
	-1   0    0    1   
$EndComp
$Comp
L power:+12V #PWR?
U 1 1 5FF31FFE
P 4650 2150
F 0 "#PWR?" H 4650 2000 50  0001 C CNN
F 1 "+12V" H 4665 2323 50  0000 C CNN
F 2 "" H 4650 2150 50  0001 C CNN
F 3 "" H 4650 2150 50  0001 C CNN
	1    4650 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	4650 2450 4650 2150
Wire Wire Line
	4650 2750 4650 2850
Wire Wire Line
	4650 2850 5400 2850
$Comp
L Device:C C?
U 1 1 5FF37EAD
P 5250 3650
F 0 "C?" V 5100 3600 50  0000 L CNN
F 1 "10n" V 5400 3600 50  0000 L CNN
F 2 "" H 5288 3500 50  0001 C CNN
F 3 "~" H 5250 3650 50  0001 C CNN
	1    5250 3650
	-1   0    0    1   
$EndComp
$Comp
L power:GND #PWR?
U 1 1 5FF389DB
P 5250 3900
F 0 "#PWR?" H 5250 3650 50  0001 C CNN
F 1 "GND" H 5255 3727 50  0000 C CNN
F 2 "" H 5250 3900 50  0001 C CNN
F 3 "" H 5250 3900 50  0001 C CNN
	1    5250 3900
	1    0    0    -1  
$EndComp
Wire Wire Line
	5250 3900 5250 3800
Wire Wire Line
	5250 3500 5250 3050
Wire Wire Line
	5250 3050 5400 3050
Wire Wire Line
	5900 3550 5900 3450
$Comp
L power:+12V #PWR?
U 1 1 5FF3A074
P 5900 2550
F 0 "#PWR?" H 5900 2400 50  0001 C CNN
F 1 "+12V" H 5915 2723 50  0000 C CNN
F 2 "" H 5900 2550 50  0001 C CNN
F 3 "" H 5900 2550 50  0001 C CNN
	1    5900 2550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5900 2550 5900 2650
$EndSCHEMATC