Version 4
SHEET 1 1032 680
WIRE -160 -32 -256 -32
WIRE -80 -32 -160 -32
WIRE 48 -32 0 -32
WIRE 160 -32 48 -32
WIRE 320 -32 256 -32
WIRE 48 -16 48 -32
WIRE -256 80 -256 -32
WIRE -160 112 -160 -32
WIRE -128 112 -160 112
WIRE -32 112 -64 112
WIRE 48 112 48 64
WIRE 48 112 -32 112
WIRE 80 112 48 112
WIRE 320 112 320 -32
WIRE 320 112 160 112
WIRE -32 128 -32 112
WIRE 320 128 320 112
WIRE 528 144 416 144
WIRE 416 160 416 144
WIRE -160 192 -160 112
WIRE -80 192 -160 192
WIRE 176 192 176 16
WIRE 176 192 16 192
WIRE 528 192 528 144
WIRE -256 208 -256 160
WIRE -256 208 -288 208
WIRE -288 224 -288 208
WIRE 176 224 176 192
WIRE 320 224 320 208
WIRE 416 272 416 240
WIRE 416 272 384 272
WIRE -256 336 -256 208
WIRE 176 336 176 304
WIRE 176 336 -256 336
WIRE 320 336 320 320
WIRE 320 336 176 336
WIRE 528 336 528 272
WIRE 528 336 320 336
FLAG -288 224 0
SYMBOL voltage -256 64 R0
WINDOW 0 -77 51 Left 2
WINDOW 3 -87 85 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL res 16 -48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 0.68
SYMBOL res 64 128 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 18k
SYMBOL res 304 112 R0
SYMATTR InstName R5
SYMATTR Value 1
SYMBOL res 160 208 R0
WINDOW 0 -41 39 Left 2
WINDOW 3 -53 73 Left 2
SYMATTR InstName R4
SYMATTR Value 4k7
SYMBOL res 32 -32 R0
SYMATTR InstName R2
SYMATTR Value 2k2
SYMBOL pmos 256 16 M270
WINDOW 0 27 0 VLeft 2
WINDOW 3 -21 63 VLeft 2
SYMATTR InstName M1
SYMATTR Value IRF7205
SYMBOL pnp 16 128 R90
WINDOW 0 58 65 VLeft 2
WINDOW 3 96 90 VLeft 2
SYMATTR InstName Q1
SYMATTR Value BC857B
SYMBOL npn 384 224 M0
WINDOW 0 88 4 Left 2
WINDOW 3 28 48 Left 2
SYMATTR InstName Q2
SYMATTR Value ZTX1048A
SYMBOL res 400 144 R0
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL voltage 528 176 R0
WINDOW 3 -156 -59 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0V 3.5V 0 5ms 5ms 0 10ms)
SYMATTR InstName V2
SYMBOL cap -64 96 R90
WINDOW 0 49 59 VBottom 2
WINDOW 3 -33 31 VTop 2
SYMATTR InstName C1
SYMATTR Value 100nF
TEXT -144 288 Left 2 !.tran 20ms