Version 4
SHEET 1 956 692
WIRE 496 48 304 48
WIRE 576 48 496 48
WIRE 784 48 576 48
WIRE 576 64 576 48
WIRE 304 96 304 48
WIRE 496 96 496 48
WIRE 544 96 496 96
WIRE 784 128 784 48
WIRE 496 160 496 96
WIRE 576 160 576 128
WIRE 304 224 304 176
WIRE 576 272 576 240
WIRE 400 320 368 320
WIRE 496 320 496 240
WIRE 496 320 480 320
WIRE 512 320 496 320
WIRE 784 320 784 208
WIRE 176 368 144 368
WIRE 288 368 256 368
WIRE 304 368 288 368
WIRE 576 384 576 368
WIRE 720 384 576 384
WIRE 288 416 288 368
WIRE 576 416 576 384
WIRE 144 432 144 368
WIRE 784 432 784 416
WIRE 784 448 784 432
WIRE 576 464 576 416
WIRE 368 496 368 416
WIRE 416 496 368 496
WIRE 416 512 416 496
WIRE 144 544 144 512
WIRE 288 544 288 480
WIRE 288 544 144 544
WIRE 368 544 368 496
WIRE 368 544 288 544
WIRE 576 544 576 528
WIRE 576 544 368 544
WIRE 784 544 784 528
WIRE 784 544 576 544
FLAG 416 512 0
FLAG 304 224 0
FLAG 576 416 Str
FLAG 784 432 Div
SYMBOL npn2 304 320 R0
WINDOW 0 68 19 Left 0
WINDOW 3 21 48 Left 0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL diode 304 480 R180
WINDOW 0 73 43 Left 0
WINDOW 3 37 19 Left 0
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL res 272 352 R90
WINDOW 0 13 103 VBottom 0
WINDOW 3 -15 7 VTop 0
SYMATTR InstName R1
SYMATTR Value 15K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage 144 416 R0
WINDOW 0 -13 58 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 3 107 Left 0
SYMATTR InstName Vs
SYMATTR Value SINE(0 6 1K)
SYMBOL cap 560 464 R0
WINDOW 0 39 6 Left 0
WINDOW 3 38 32 Left 0
SYMATTR InstName C1
SYMATTR Value 220n
SYMBOL pnp2 512 368 M180
WINDOW 0 69 78 Left 0
WINDOW 3 21 49 Left 0
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL res 496 304 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 3K9
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 480 144 R0
WINDOW 0 27 47 Left 0
WINDOW 3 26 84 Left 0
SYMATTR InstName R3
SYMATTR Value 680
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 592 256 R180
WINDOW 0 -29 64 Left 0
WINDOW 3 -38 30 Left 0
SYMATTR InstName R4
SYMATTR Value 220
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL Robertugo\\Pote 560 32 R0
WINDOW 0 42 38 Left 0
WINDOW 3 41 65 Left 0
WINDOW 123 74 90 Center 0
SYMATTR InstName P1
SYMATTR Value Rt=10K
SYMBOL res 768 112 R0
WINDOW 0 -43 39 Left 0
WINDOW 3 -44 65 Left 0
SYMATTR InstName R5
SYMATTR Value 180
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 768 432 R0
WINDOW 0 -43 39 Left 0
WINDOW 3 -40 66 Left 0
SYMATTR InstName R6
SYMATTR Value 47
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage 304 80 R0
WINDOW 0 38 54 Left 0
WINDOW 3 -13 57 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 4 -3 Left 0
SYMATTR InstName Vcc
SYMATTR Value 24
SYMATTR SpiceLine Rser=1 Cpar=1u
SYMBOL Miscel\\nujt 736 416 M180
WINDOW 0 -3 101 Left 0
WINDOW 38 -32 63 Center 0
SYMATTR InstName Ujt
TEXT 128 56 Left 0 !.tran 50m