Version 4
SHEET 1 880 680
WIRE 64 96 -16 96
WIRE 208 96 144 96
WIRE 320 96 208 96
WIRE -16 144 -16 96
WIRE 208 144 208 96
WIRE 320 144 320 96
WIRE -16 304 -16 224
WIRE 208 304 208 224
WIRE 208 304 -16 304
WIRE 320 304 320 224
WIRE 320 304 208 304
WIRE 208 336 208 304
FLAG 208 336 0
SYMBOL res 48 112 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R1
SYMATTR Value 5
SYMBOL res 192 128 R0
SYMATTR InstName R2
SYMATTR Value 4
SYMBOL res 304 128 R0
SYMATTR InstName R3
SYMATTR Value 3
SYMBOL voltage -16 128 R0
WINDOW 123 24 132 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 24 44 Left 0
SYMATTR InstName V1
SYMATTR Value 15
TEXT 440 312 Left 0 !.op