Version 4 SHEET 1 2236 808 WIRE 32 96 16 96 WIRE 1456 96 1424 96 WIRE 16 128 16 96 WIRE 224 128 16 128 WIRE 352 128 224 128 WIRE 400 128 352 128 WIRE 656 128 496 128 WIRE 672 128 656 128 WIRE 784 128 752 128 WIRE 944 128 784 128 WIRE 1152 128 944 128 WIRE 1424 128 1424 96 WIRE 1424 128 1152 128 WIRE 1648 128 1424 128 WIRE 1152 160 1152 128 WIRE 1424 160 1424 128 WIRE 16 176 16 128 WIRE 1648 176 1648 128 WIRE 944 192 944 128 WIRE 224 208 224 128 WIRE 352 208 352 128 WIRE 448 208 448 192 WIRE 656 272 656 128 WIRE 1152 272 1152 240 WIRE 16 304 16 256 WIRE 1424 304 1424 224 WIRE 1648 304 1648 240 WIRE 944 320 944 272 WIRE 224 336 224 288 WIRE 400 336 400 272 WIRE 400 336 224 336 WIRE 608 336 400 336 WIRE 784 336 784 128 WIRE 784 336 704 336 WIRE 224 368 224 336 WIRE 1152 368 1152 336 WIRE 944 416 944 400 WIRE 944 416 288 416 WIRE 944 432 944 416 WIRE 64 512 0 512 WIRE 128 512 64 512 WIRE 160 512 128 512 WIRE 224 512 224 464 WIRE 224 512 160 512 WIRE 944 544 944 512 WIRE 0 560 0 512 WIRE 64 560 64 512 WIRE 128 560 128 512 WIRE 160 592 160 512 WIRE 0 656 0 624 WIRE 64 656 64 624 WIRE 128 656 128 624 WIRE 944 656 944 624 FLAG 32 96 SUPPLY FLAG 128 656 0 FLAG 1456 96 OUTPUT FLAG 1424 304 0 FLAG 944 656 0 FLAG 1648 304 0 FLAG 16 304 0 FLAG 0 656 0 FLAG 64 656 0 FLAG 1152 368 0 SYMBOL res 240 304 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R2 SYMATTR Value 1k2 SYMBOL npn2 400 192 R270 WINDOW 0 73 24 VRight 2 WINDOW 3 99 25 VRight 2 SYMATTR InstName Q1 SYMATTR Value 2N3055 SYMBOL npn2 352 272 R270 WINDOW 0 49 103 VRight 2 WINDOW 3 11 82 VRight 2 SYMATTR InstName Q2 SYMATTR Value BC140 SYMBOL cap 1408 160 R0 SYMATTR InstName C1 SYMATTR Value 100µ SYMBOL npn2 288 368 M0 SYMATTR InstName Q3 SYMATTR Value BC107 SYMBOL res 960 176 M0 SYMATTR InstName R3 SYMATTR Value 100 SYMBOL voltage 16 160 R0 WINDOW 3 -34 181 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value 19V SYMATTR InstName V1 SYMBOL tl431 144 560 M0 WINDOW 0 -41 82 Left 2 WINDOW 3 -102 54 Left 2 SYMATTR InstName U2 SYMATTR Value TL431A SYMBOL res 928 304 R0 SYMATTR InstName R5 SYMATTR Value 4.917k SYMBOL res 928 416 R0 SYMATTR InstName R6 SYMATTR Value 5.083k SYMBOL cap 48 560 R0 SYMATTR InstName C2 SYMATTR Value 1n SYMBOL cap -16 560 R0 SYMATTR InstName C3 SYMATTR Value 1µ SYMBOL current 1152 160 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I1 SYMATTR Value 50mA SYMBOL LED 1136 272 R0 SYMATTR InstName D1 SYMATTR Value LedRed SYMBOL res 768 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 0.22 SYMBOL res 928 528 R0 SYMATTR InstName R1 SYMATTR Value 1k SYMBOL npn2 608 272 M90 WINDOW 0 49 103 VRight 2 WINDOW 3 11 82 VRight 2 SYMATTR InstName Q5 SYMATTR Value BC107 SYMBOL load 1632 176 R0 WINDOW 3 87 341 VLeft 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0A 2.5A 50µ 1n 1n 100µ 300µ) SYMATTR InstName I2 TEXT 1592 616 Left 2 !.tran 500µS TEXT 1472 648 Left 2 !.include "tl431a.sub" TEXT 1008 456 Left 2 ;R5+R6 = 5k Poti TEXT 1424 64 Left 2 ;Uout ca. 3.25V - 17.8V TEXT 1016 32 Left 2 ;--- GRUNDLAST ---\nz.B. Volt-/Amperemeter\nHintergrundbeleuchtung TEXT 640 40 Left 2 ;Strombegrenzung\nImax = 0.7V/R4 (3.18A)