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?" 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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?" 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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