Version 4 SHEET 1 936 680 WIRE 400 -96 400 -128 WIRE 288 -80 288 -96 WIRE 288 -48 256 -48 WIRE 288 -32 288 -48 WIRE 256 -16 256 -48 WIRE 288 16 288 0 WIRE -96 112 -96 64 WIRE 224 112 224 96 WIRE 64 128 64 48 WIRE 96 128 64 128 WIRE 192 128 176 128 WIRE -16 144 -48 144 WIRE 272 144 256 144 WIRE 400 144 400 -16 WIRE 400 144 352 144 WIRE -16 160 -16 144 WIRE 192 160 64 160 WIRE 224 192 224 176 WIRE 400 208 400 144 WIRE -96 224 -96 192 WIRE 400 320 400 288 WIRE 352 464 304 464 WIRE 544 464 496 464 WIRE 592 464 544 464 WIRE 736 464 672 464 WIRE 784 464 736 464 WIRE 880 464 784 464 WIRE 304 496 304 464 WIRE 784 512 784 464 WIRE 880 528 880 464 WIRE 736 544 736 464 WIRE 304 656 304 528 WIRE 736 656 736 608 WIRE 736 656 304 656 WIRE 880 656 880 608 WIRE 880 656 736 656 FLAG 256 -16 0 FLAG 288 -96 +5V FLAG 400 -128 +5V FLAG 224 96 +5V FLAG 288 16 -5V FLAG 224 192 -5V FLAG 784 512 0 FLAG 64 48 struja FLAG 544 464 struja FLAG -96 224 0 FLAG -96 64 +5V SYMBOL MiniSyms4\\voltage- 288 -64 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 5V SYMBOL MiniSyms4\\voltage- 288 -16 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 5V SYMBOL MiniSyms4\\voltage- 304 512 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 50V SYMBOL OpAmps\\UniversalOpAmp 224 144 R0 SYMATTR InstName U1 SYMBOL current 400 -96 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName I1 SYMATTR Value 10mA SYMBOL res 368 128 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 100 SYMBOL Darlington\\NpnDarlington 352 336 M90 SYMATTR InstName U2 SYMBOL res 384 192 R0 SYMATTR InstName R2 SYMATTR Value 100 SYMBOL res 688 448 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 0.2 SYMBOL cap 720 544 R0 SYMATTR InstName C1 SYMATTR Value 10µF SYMBOL res 80 144 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 10k SYMBOL res 192 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL res 864 512 R0 SYMATTR InstName R6 SYMATTR Value 1 SYMBOL Pot&Sw\\pot -112 208 M180 SYMATTR InstName U3 SYMATTR Value Rt=10K set=1 TEXT -126 662 Left 2 !.tran 10