Version 4
SHEET 1 952 684
WIRE -144 256 -336 256
WIRE 0 256 -144 256
WIRE 144 256 64 256
WIRE 224 256 144 256
WIRE 448 256 320 256
WIRE -144 272 -144 256
WIRE 224 272 224 256
WIRE 288 272 272 272
WIRE 320 272 320 256
WIRE 352 272 336 272
WIRE 0 288 0 256
WIRE 144 288 144 256
WIRE 288 288 288 272
WIRE 448 288 448 256
WIRE 448 288 384 288
WIRE 384 304 384 288
WIRE -240 320 -256 320
WIRE -208 320 -240 320
WIRE -96 320 -144 320
WIRE 32 320 -96 320
WIRE 208 320 32 320
WIRE 336 320 336 272
WIRE -256 336 -256 320
WIRE -240 336 -256 336
WIRE 32 336 32 320
WIRE 64 336 64 256
WIRE -256 352 -256 336
WIRE 272 352 272 336
WIRE 272 352 224 352
WIRE -128 368 -144 368
WIRE 32 368 -128 368
WIRE 144 368 144 288
WIRE 336 368 320 368
WIRE -240 384 -240 336
WIRE -224 384 -240 384
WIRE -128 384 -128 368
WIRE -128 384 -144 384
WIRE -336 400 -336 256
WIRE -320 400 -336 400
WIRE 0 400 0 288
WIRE 384 400 384 384
WIRE -256 432 -256 400
WIRE -96 432 -96 320
WIRE -96 432 -256 432
WIRE 224 432 224 352
WIRE 224 432 192 432
WIRE 256 432 224 432
WIRE 272 432 256 432
WIRE 384 432 384 400
WIRE 384 432 352 432
WIRE 64 448 64 416
WIRE 96 448 96 432
WIRE 96 448 64 448
WIRE 144 448 144 432
WIRE 208 448 208 320
WIRE 208 448 144 448
WIRE 432 448 416 448
WIRE -336 464 -336 400
WIRE -256 464 -256 448
WIRE -208 464 -256 464
WIRE -112 464 -144 464
WIRE 416 464 416 448
WIRE 224 480 224 432
WIRE 352 480 224 480
WIRE -256 496 -256 464
WIRE -208 496 -256 496
WIRE -112 496 -112 464
WIRE -112 496 -128 496
WIRE -64 496 -112 496
WIRE 0 496 0 480
WIRE 0 496 -64 496
WIRE 352 496 352 480
WIRE 32 512 32 368
WIRE 112 512 32 512
WIRE 224 512 176 512
WIRE -256 528 -256 496
WIRE 64 528 64 448
WIRE 64 528 -256 528
WIRE 416 544 416 528
WIRE 432 544 416 544
WIRE 64 560 64 528
WIRE 224 560 224 512
WIRE -336 592 -336 544
WIRE -256 592 -256 528
WIRE -256 592 -336 592
WIRE -224 592 -256 592
WIRE 0 592 0 496
WIRE 0 592 -144 592
WIRE 64 592 64 560
WIRE 112 592 64 592
WIRE 224 592 224 560
WIRE 224 592 192 592
WIRE 240 592 224 592
WIRE 352 592 352 576
WIRE 352 592 304 592
WIRE 400 592 352 592
WIRE 448 592 448 288
WIRE 448 592 400 592
FLAG 0 288 Vb1
FLAG -240 320 Vb1p
FLAG -128 368 Vd1
FLAG 64 560 Mt1
FLAG -64 496 Ctrl1
FLAG 256 432 Vb2
FLAG 400 592 Vd2
FLAG 224 560 Mt2
FLAG 144 288 Vb2p
FLAG 384 400 N1
FLAG 352 272 Ctrl1
FLAG 320 368 Mt1
FLAG 32 336 0
FLAG 432 544 1
FLAG 432 448 2
FLAG 288 288 0
SYMBOL npn4 -320 352 R0
WINDOW 0 -4 -33 Left 0
WINDOW 3 -6 -9 Left 0
SYMATTR InstName Q1
SYMATTR Value NPN1
SYMBOL res 16 496 R180
WINDOW 0 47 75 Left 0
WINDOW 3 29 49 Left 0
SYMATTR InstName R2
SYMATTR Value {RH1}
SYMBOL res -352 448 R0
WINDOW 0 32 50 Left 0
WINDOW 3 22 97 Left 0
SYMATTR InstName R3
SYMATTR Value {Rh2}
SYMBOL res -112 480 R90
WINDOW 0 16 113 VBottom 0
WINDOW 3 -11 22 VTop 0
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL pnp4 -208 272 R0
WINDOW 0 80 7 Left 0
WINDOW 3 -9 -1 Left 0
SYMATTR InstName Q2
SYMATTR Value PNP1
SYMBOL cap -144 448 R90
WINDOW 0 16 57 VBottom 0
WINDOW 3 -12 -2 VTop 0
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL res -128 368 R90
WINDOW 0 0 88 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value {Rh3}
SYMBOL bi -144 592 R90
WINDOW 0 -2 40 VBottom 0
WINDOW 3 -60 -13 VTop 0
SYMATTR InstName B1
SYMATTR Value I=-500*I(DLed)*3m/Itrig
SYMBOL res 368 592 R180
WINDOW 0 35 77 Left 0
WINDOW 3 33 45 Left 0
SYMATTR InstName R6
SYMATTR Value {Rh2}
SYMBOL diode 304 576 R90
WINDOW 0 16 61 VBottom 0
WINDOW 3 -12 3 VTop 0
SYMATTR InstName D3
SYMATTR Value Di
SYMBOL pnp4 192 368 R90
WINDOW 0 33 32 VRight 0
WINDOW 3 2 -14 VRight 0
SYMATTR InstName Q3
SYMATTR Value PNP1
SYMBOL npn4 224 336 R270
WINDOW 0 30 26 VRight 0
WINDOW 3 -2 -15 VRight 0
SYMATTR InstName Q4
SYMATTR Value NPN1
SYMBOL e 384 288 R0
WINDOW 0 -14 58 Left 0
WINDOW 3 38 54 Left 0
SYMATTR InstName E1
SYMATTR Value -1
SYMBOL res 256 448 R270
WINDOW 0 31 51 VTop 0
WINDOW 3 0 54 VBottom 0
SYMATTR InstName R5
SYMATTR Value {Rh1}
SYMBOL res 48 320 R0
WINDOW 0 32 19 Left 0
WINDOW 3 27 46 Left 0
SYMATTR InstName R7
SYMATTR Value {Rh3}
SYMBOL diode 176 496 R90
WINDOW 0 16 71 VBottom 0
WINDOW 3 -12 -12 VTop 0
SYMATTR InstName D2
SYMATTR Value Di
SYMBOL res 208 576 R90
WINDOW 0 -1 88 VBottom 0
WINDOW 3 -28 44 VTop 0
SYMATTR InstName R34
SYMATTR Value 1e8
SYMBOL LED 432 528 R180
WINDOW 0 18 71 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName DLed
SYMATTR Value DL
TEXT 64 216 Left 0 !.Param Rh1=20k\n.Param Rh2=20k
TEXT -336 160 Left 0 !.MODEL PNP1 PNP(Is=1e-15 BF=10 Cjc=10p Cje=20p Tf=0.1u Ise=1e-12)\n.MODEL NPN1 NPN(Is=1e-15 BF=10 Cjc=10p Cje=20p Tf=0.1u Ise=1e-12)\n.MODEL Di D(Is=0.1u Rs=2 Cj0=50p)\n.MODEL DL D(Is=1e-20 Rs=5)
TEXT -328 136 Left 0 ;3020 Itrig=15m ; 3021 Itrig=8m ; 3022 Itrig=5m ; 3023 Itrig=3m & Cjc=5p
TEXT -152 608 Left 0 !.Param Itrig=15m
TEXT 248 216 Left 0 !.Param Rh3=16.7k