Version 4
SHEET 1 880 680
WIRE 144 112 32 112
WIRE 208 112 144 112
WIRE 224 112 208 112
WIRE 320 112 304 112
WIRE 32 128 32 112
WIRE 320 128 320 112
WIRE 144 144 144 112
WIRE 32 224 32 208
WIRE 144 224 144 208
WIRE 144 224 32 224
WIRE 144 240 144 224
WIRE 176 240 176 176
WIRE 208 240 208 112
WIRE 320 240 320 208
FLAG 144 240 5
FLAG 176 240 4
FLAG 320 240 1
FLAG 208 240 3
SYMBOL Robertugo\\xref3 160 144 M0
WINDOW 0 22 2 Left 0
WINDOW 38 50 66 Center 0
SYMATTR InstName U1
SYMATTR SpiceModel TL431
SYMBOL res 16 112 R0
WINDOW 0 35 48 Left 0
WINDOW 3 20 80 Left 0
SYMATTR InstName r1
SYMATTR Value 2k2
SYMBOL res 320 96 R90
WINDOW 0 16 102 VBottom 0
WINDOW 3 -12 10 VTop 0
SYMATTR InstName r2
SYMATTR Value 100k
SYMBOL res 304 112 R0
WINDOW 0 -32 33 Left 0
WINDOW 3 -32 63 Left 0
SYMATTR InstName r3
SYMATTR Value 6k8
TEXT 32 80 Left 0 ;DM-58