Version 4
SHEET 1 880 680
WIRE -32 -144 -80 -144
WIRE 144 -144 -32 -144
WIRE -80 -64 -80 -144
WIRE -32 -64 -32 -144
WIRE 224 -64 -32 -64
WIRE 16 16 16 0
WIRE 16 16 -80 16
WIRE 160 16 96 16
WIRE -80 80 -80 16
WIRE -80 80 -288 80
WIRE 96 80 96 16
WIRE 224 80 224 -64
WIRE 160 96 160 16
WIRE 192 96 160 96
WIRE -32 112 -32 -64
WIRE 48 112 -32 112
WIRE 192 128 160 128
WIRE -80 160 -288 160
WIRE 336 176 336 112
WIRE -80 224 -80 160
WIRE 16 224 -80 224
WIRE 96 224 96 160
WIRE 160 224 160 128
WIRE 160 224 96 224
FLAG 224 -144 0
FLAG -80 304 0
FLAG 336 240 0
FLAG 224 144 0
SYMBOL Robert\\Projekte\\Piepse\\potentiometer 112 176 R180
SYMATTR InstName U2
SYMATTR Value Rtot=470K wiper=.5
SYMBOL res 112 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1000
SYMBOL res 112 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1000
SYMBOL res -64 32 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL res -64 320 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL res -64 176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res -304 64 R0
SYMATTR InstName R6
SYMATTR Value 0,01
SYMBOL voltage 128 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL res 352 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL LED 320 176 R0
SYMATTR InstName D1
SYMATTR Value QTLP690C
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL Opamps\\UniversalOpamp2 224 112 R0
SYMATTR InstName U1
TEXT -306 328 Left 2 !.tran 100m