Version 4
SHEET 1 880 680
WIRE 240 -176 192 -176
WIRE -16 -80 -32 -80
WIRE 112 -80 64 -80
WIRE 192 -80 192 -176
WIRE 192 -80 112 -80
WIRE 384 -80 192 -80
WIRE 112 -48 112 -80
WIRE 384 -48 384 -80
WIRE -32 48 -32 -80
WIRE -16 48 -32 48
WIRE 112 48 112 32
WIRE 112 48 64 48
WIRE 112 64 112 48
WIRE -32 160 -32 48
WIRE -16 160 -32 160
WIRE 112 160 112 144
WIRE 112 160 64 160
WIRE 192 160 112 160
WIRE 384 160 384 32
WIRE 384 160 192 160
WIRE 192 176 192 160
FLAG 240 -176 TH_Ersatzmesspkt
IOPIN 240 -176 In
FLAG 192 176 0
SYMBOL res -32 -96 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 40
SYMBOL res -32 32 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 60
SYMBOL res -32 144 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 30
SYMBOL res 96 -64 R0
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL voltage 112 48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 1
SYMBOL current 384 32 R180
WINDOW 0 24 80 Left 2
WINDOW 3 8 32 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I2
SYMATTR Value 1
TEXT 456 16 Left 2 !.dc I2 0 1 .001
TEXT 248 -24 Left 2 ;<---- VTh   \n \n<------ RTh
TEXT 448 -40 Left 2 ;variable current source
TEXT -8 264 Left 2 ;Diagramm V(th_ersatzmesspkt)\n \nRE= (delta V)/ (delta I) = (V2-V1)/(I2-I1) =
TEXT -32 -248 Left 2 ;Ersatzwiderstand\nhttps://www.mikrocontroller.net/topic/487151
LINE Normal 416 -128 416 -128 2
RECTANGLE Normal 160 224 -80 -144 2
RECTANGLE Normal 672 224 224 -144 2