Version 4
SHEET 1 880 680
WIRE -176 112 -320 112
WIRE -144 112 -176 112
WIRE 128 112 -144 112
WIRE 288 112 128 112
WIRE 400 112 288 112
WIRE 480 112 400 112
WIRE -176 128 -176 112
WIRE 288 144 288 112
WIRE 400 144 400 112
WIRE -112 160 -128 160
WIRE 128 160 128 112
WIRE 128 160 112 160
WIRE -176 224 -176 208
WIRE -112 224 -176 224
WIRE 208 224 112 224
WIRE 288 256 288 224
WIRE -272 288 -288 288
WIRE -176 288 -176 224
WIRE -176 288 -192 288
WIRE -112 288 -160 288
WIRE 208 288 208 224
WIRE 208 288 112 288
WIRE -160 304 -160 288
WIRE -160 304 -176 304
WIRE 400 304 400 224
WIRE 400 304 352 304
WIRE 528 304 432 304
WIRE -176 320 -176 304
WIRE 480 320 480 112
WIRE 432 336 432 304
WIRE 448 336 432 336
WIRE -288 352 -288 288
WIRE -256 352 -256 336
WIRE -256 352 -288 352
WIRE -144 352 -144 112
WIRE -112 352 -144 352
WIRE 128 352 112 352
WIRE 528 352 528 304
WIRE 528 352 512 352
WIRE 544 352 528 352
WIRE 208 368 208 288
WIRE 288 368 288 352
WIRE 288 368 208 368
WIRE 448 368 288 368
WIRE -320 384 -320 112
WIRE 400 400 400 304
WIRE -208 416 -208 336
WIRE 128 416 128 352
WIRE 208 416 208 368
WIRE -320 480 -320 464
WIRE -256 480 -256 352
WIRE -256 480 -320 480
WIRE -320 496 -320 480
WIRE -256 512 -256 480
WIRE -208 512 -208 496
WIRE -208 512 -256 512
WIRE -128 512 -128 160
WIRE -128 512 -208 512
WIRE 128 512 128 480
WIRE 128 512 -128 512
WIRE 208 512 208 480
WIRE 208 512 128 512
WIRE 400 512 400 480
WIRE 400 512 208 512
WIRE 480 512 480 384
WIRE 480 512 400 512
FLAG -320 496 0
FLAG 544 352 Out
IOPIN 544 352 Out
FLAG -176 320 555Out
IOPIN -176 320 Out
SYMBOL Robertugo\\555_ALL 48 272 R0
SYMATTR InstName U1
SYMBOL cap 112 416 R0
SYMATTR InstName Cbp
SYMATTR Value 10n
SYMBOL res 272 128 R0
WINDOW 0 -36 40 Left 0
WINDOW 3 -37 65 Left 0
SYMATTR InstName R1
SYMATTR Value 2k7
SYMBOL voltage -320 368 R0
WINDOW 0 9 5 Left 0
WINDOW 3 -15 59 Left 0
SYMATTR InstName V+
SYMATTR Value 12
SYMBOL cap 192 416 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL pnp2 352 352 R180
WINDOW 0 37 36 Left 0
WINDOW 3 39 62 Left 0
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL res 384 128 R0
WINDOW 0 -36 40 Left 0
WINDOW 3 -36 66 Left 0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL res 384 384 R0
WINDOW 0 -41 41 Left 0
WINDOW 3 -42 63 Left 0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL Robertugo\\OPAMP5 480 288 R0
WINDOW 0 -26 64 Left 0
WINDOW 38 5 108 Left 0
SYMATTR InstName U2
SYMATTR SpiceModel TL082
SYMBOL res -192 112 R0
WINDOW 0 -41 41 Left 0
WINDOW 3 -42 63 Left 0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL sw -288 288 R270
WINDOW 0 -29 2 VRight 0
WINDOW 3 -10 48 VRight 0
SYMATTR InstName S1
SYMATTR Value S
SYMBOL voltage -208 400 R0
WINDOW 0 -24 57 Left 0
WINDOW 3 64 -41 VRight 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vctrl
SYMATTR Value SINE(0 1 10k)
TEXT -338 528 Left 0 !.tran 1m
TEXT -216 528 Left 0 !.model S Sw(Ron=1 Roff=1e6 Vt=0 Vh=0)