Version 4
SHEET 1 3284 2480
WIRE 2464 1504 2144 1504
WIRE 2656 1504 2464 1504
WIRE 2144 1536 2144 1504
WIRE 2656 1552 2656 1504
WIRE 2464 1584 2464 1504
WIRE 2144 1632 2144 1616
WIRE 2256 1632 2144 1632
WIRE 2400 1632 2336 1632
WIRE 2144 1664 2144 1632
WIRE 1824 1712 1600 1712
WIRE 1904 1712 1888 1712
WIRE 1952 1712 1904 1712
WIRE 2080 1712 2032 1712
WIRE 2464 1760 2464 1680
WIRE 1600 1888 1600 1712
WIRE 2144 1888 2144 1760
WIRE 2144 1888 2064 1888
WIRE 2464 1904 2464 1840
WIRE 2752 1904 2464 1904
WIRE 2896 1904 2832 1904
WIRE 2064 1936 2064 1888
WIRE 2464 1968 2464 1904
WIRE 1600 2032 1600 1968
WIRE 2144 2064 2144 1888
WIRE 2656 2080 2656 1632
WIRE 2896 2080 2896 1904
WIRE 2896 2080 2656 2080
WIRE 1904 2112 1904 1712
WIRE 1968 2112 1904 2112
WIRE 2080 2112 2048 2112
WIRE 2464 2144 2464 2048
WIRE 2896 2160 2896 2080
WIRE 2144 2192 2144 2160
WIRE 2272 2192 2144 2192
WIRE 2400 2192 2352 2192
WIRE 2144 2208 2144 2192
WIRE 2656 2208 2656 2080
WIRE 2144 2336 2144 2288
WIRE 2464 2336 2464 2240
WIRE 2464 2336 2144 2336
WIRE 2656 2336 2656 2288
WIRE 2656 2336 2464 2336
FLAG 2896 2160 0
FLAG 2064 1936 0
FLAG 1600 2032 0
SYMBOL VOLTAGE 1600 1872 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 5 0 0 0 20us 40us)
SYMBOL npn 2400 2144 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL VOLTAGE 2656 2192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL VOLTAGE 2656 1536 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL pnp 2400 1680 M180
SYMATTR InstName Q4
SYMATTR Value 2N3906
SYMBOL RES 2848 1888 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1000
SYMBOL npn 2080 1664 R0
SYMATTR InstName Q6
SYMATTR Value 2N3904
SYMBOL RES 2448 1744 R0
SYMATTR InstName R3
SYMATTR Value 220
SYMBOL RES 2448 1952 R0
SYMATTR InstName R4
SYMATTR Value 220
SYMBOL RES 2128 1520 R0
SYMATTR InstName R1
SYMATTR Value 1000
SYMBOL RES 2128 2192 R0
SYMATTR InstName R2
SYMATTR Value 1000
SYMBOL RES 2352 1616 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 22k
SYMBOL RES 2368 2176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 22k
SYMBOL cap 1888 1696 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 100nf
SYMBOL RES 2048 1696 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 4000
SYMBOL RES 2064 2096 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 4000
SYMBOL pnp 2080 2160 M180
SYMATTR InstName Q2
SYMATTR Value 2N3906
TEXT 1576 2168 Left 2 !.tran 10ms startup
TEXT 1576 2208 Left 2 !.options method=trap