Version 4
SHEET 1 1164 680
WIRE -992 -944 -1168 -944
WIRE -896 -944 -992 -944
WIRE -1904 -896 -1904 -960
WIRE -1392 -896 -1392 -960
WIRE -1168 -832 -1168 -944
WIRE -1216 -816 -1216 -864
WIRE -1904 -752 -1904 -816
WIRE -1840 -752 -1904 -752
WIRE -1744 -752 -1760 -752
WIRE -1536 -752 -1680 -752
WIRE -1392 -752 -1392 -816
WIRE -1392 -752 -1456 -752
WIRE -1216 -720 -1216 -768
WIRE -1168 -720 -1168 -752
WIRE -1040 -720 -1168 -720
WIRE -1744 -704 -1744 -752
WIRE -1552 -704 -1744 -704
WIRE -1904 -688 -1904 -752
WIRE -1392 -688 -1392 -752
WIRE -2448 -672 -2448 -736
WIRE -2320 -672 -2320 -704
WIRE -2640 -656 -2640 -752
WIRE -1696 -640 -1840 -640
WIRE -1680 -640 -1680 -752
WIRE -1680 -640 -1696 -640
WIRE -1552 -640 -1552 -704
WIRE -1536 -640 -1552 -640
WIRE -1456 -640 -1536 -640
WIRE -2320 -560 -2320 -592
WIRE -2640 -512 -2640 -576
WIRE -2448 -512 -2448 -592
WIRE -1904 -496 -1904 -592
WIRE -1392 -496 -1392 -592
WIRE -1536 -448 -1536 -640
WIRE -1504 -448 -1536 -448
WIRE -1136 -448 -1440 -448
WIRE -1136 -432 -1136 -448
WIRE -1008 -416 -1088 -416
WIRE -1696 -400 -1696 -640
WIRE -1536 -400 -1536 -448
WIRE -1536 -368 -1536 -400
WIRE -1504 -368 -1536 -368
WIRE -1360 -368 -1440 -368
WIRE -1280 -368 -1360 -368
WIRE -1360 -336 -1360 -368
WIRE -1280 -336 -1280 -368
WIRE -1440 -320 -1440 -368
WIRE -1136 -320 -1136 -352
WIRE -1088 -320 -1088 -368
WIRE -1440 -240 -1440 -256
WIRE -1360 -224 -1360 -256
WIRE -1280 -224 -1280 -272
FLAG -2640 -752 12V
FLAG -2640 -512 0
FLAG -1216 -864 0
FLAG -2448 -512 0
FLAG -2320 -560 0
FLAG -1216 -720 Switch1
FLAG -2448 -736 Switch1
FLAG -2320 -704 switch2
FLAG -1088 -320 0
FLAG -1008 -416 switch2
FLAG -1904 -496 0
FLAG -1392 -496 0
FLAG -1392 -960 12V
FLAG -1904 -960 12V
FLAG -1696 -400 S
FLAG -1040 -720 S
FLAG -1536 -400 R
FLAG -992 -944 0
FLAG -1440 -240 0
FLAG -1360 -224 12V
FLAG -1136 -320 0
FLAG -1280 -224 12V
SYMBOL voltage -2640 -672 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PWL(0 0 1m 12 18 12 18.00001 0)
SYMBOL sw -1168 -848 R0
SYMATTR InstName S1
SYMATTR Value SW1
SYMBOL voltage -2448 -688 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 26 167 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(-1 20 2 0 0 2.5 5 1)
SYMBOL voltage -2320 -688 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(-1 20 15 0 0 2 4 1)
SYMBOL sw -1136 -336 R180
SYMATTR InstName S2
SYMATTR Value SW2
SYMBOL npn -1456 -688 R0
SYMATTR InstName Q1
SYMATTR Value 2N2369
SYMBOL npn -1840 -688 M0
SYMATTR InstName Q2
SYMATTR Value 2N2369
SYMBOL res -1440 -768 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 3,6k
SYMBOL res -1744 -768 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 3,6k
SYMBOL res -1888 -800 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 360
SYMBOL res -1376 -800 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName Last
SYMATTR Value 360
SYMBOL cap -1456 -320 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL diode -1504 -432 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL diode -1504 -352 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N914
SYMBOL res -1376 -352 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL diode -1296 -336 R0
SYMATTR InstName D3
TEXT -2872 -904 Left 2 !.model SW2 SW(Ron=1 Roff=1000meg Vt=6 Vh=.5)
TEXT -2880 -864 Left 2 !.model SW1 SW(Ron=1 Roff=1000meg Vt=6 Vh=.5)
TEXT -2872 -712 Left 2 !.tran 0 20s 0 0.1