Version 4
SHEET 1 880 680
WIRE -112 -48 -240 -48
WIRE 64 -48 -112 -48
WIRE 416 -48 64 -48
WIRE 448 -48 416 -48
WIRE -240 -32 -240 -48
WIRE 416 0 416 -48
WIRE 560 0 416 0
WIRE 640 0 608 0
WIRE 416 32 416 0
WIRE -240 64 -240 48
WIRE -112 96 -112 -48
WIRE 608 96 608 0
WIRE 560 112 560 0
WIRE 416 160 416 112
WIRE -240 176 -240 144
WIRE 416 272 416 240
WIRE 560 272 560 160
WIRE 560 272 416 272
WIRE 608 272 608 176
WIRE -192 336 -240 336
WIRE -96 336 -192 336
WIRE 160 336 -16 336
WIRE 416 336 416 272
WIRE 416 336 240 336
WIRE 448 336 416 336
WIRE -192 368 -192 336
WIRE 416 416 416 336
WIRE 64 432 64 -48
WIRE -16 448 -16 336
WIRE 32 448 -16 448
WIRE 160 464 96 464
WIRE 352 464 240 464
WIRE -192 480 -192 448
WIRE -192 480 -272 480
WIRE -112 480 -112 176
WIRE 32 480 -112 480
WIRE -112 496 -112 480
WIRE -272 512 -272 480
WIRE -192 512 -192 480
WIRE 64 576 64 496
WIRE 416 576 416 512
WIRE 416 576 64 576
WIRE -192 624 -192 592
WIRE 64 624 64 576
WIRE 64 624 -192 624
FLAG -240 176 0
FLAG -272 512 0
FLAG 448 336 emitter
IOPIN 448 336 Out
FLAG 448 -48 +12
IOPIN 448 -48 Out
FLAG -112 576 0
FLAG -240 336 in
IOPIN -240 336 Out
FLAG 608 272 0
FLAG 640 0 solenoid
SYMBOL Opamps\\1pole 64 464 R0
SYMATTR InstName U2
SYMBOL res 0 320 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 12k
SYMBOL res 256 320 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 56k
SYMBOL res 256 448 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL pnp 352 512 M180
SYMATTR InstName Q1
SYMATTR Value 2N2905A
SYMBOL res 400 144 R0
SYMATTR InstName R7
SYMATTR Value 400
SYMBOL ind 400 16 R0
SYMATTR InstName L1
SYMATTR Value 1h
SYMBOL voltage -240 -48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 -14 56 Left 0
WINDOW 3 37 54 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage -192 496 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 -14 59 Left 0
WINDOW 3 -76 58 Left 0
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL voltage -192 352 R0
WINDOW 3 -451 56 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 0 -16 58 Left 0
SYMATTR Value PULSE(.5 4.5 0 10m 10m 50m 100m 10)
SYMATTR InstName V3
SYMBOL voltage -240 48 R0
WINDOW 0 -12 55 Left 0
WINDOW 3 -298 56 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value SINE(0 1 100 0 0 0 1000)
SYMBOL res -128 480 R0
SYMATTR InstName R1
SYMATTR Value 12k
SYMBOL res -128 80 R0
SYMATTR InstName R2
SYMATTR Value 56k
SYMBOL e 608 80 R0
SYMATTR InstName E1
SYMATTR Value 1
TEXT -480 -80 Left 0 !.tran 0 .3 0 10u