Version 4
SHEET 1 1200 1172
WIRE 32 48 -256 48
WIRE -256 96 -256 48
WIRE 128 96 128 64
WIRE 32 112 32 48
WIRE 96 112 32 112
WIRE 240 128 160 128
WIRE 320 128 240 128
WIRE 384 128 320 128
WIRE 96 144 32 144
WIRE 320 176 320 128
WIRE -256 192 -256 176
WIRE 128 192 128 160
WIRE -128 256 -256 256
WIRE 32 256 32 144
WIRE 32 256 -48 256
WIRE 64 256 32 256
WIRE 240 256 240 128
WIRE 240 256 144 256
WIRE -256 288 -256 256
WIRE 320 304 320 256
WIRE -256 384 -256 368
WIRE 416 400 416 368
WIRE 416 512 416 480
WIRE -96 576 -144 576
WIRE 32 576 -16 576
WIRE 80 576 32 576
WIRE 208 576 160 576
WIRE 128 704 128 672
WIRE 32 720 32 576
WIRE 96 720 32 720
WIRE 208 736 208 576
WIRE 208 736 160 736
WIRE 320 736 208 736
WIRE 384 736 320 736
WIRE 96 752 -144 752
WIRE 320 784 320 736
WIRE 128 800 128 768
WIRE 320 912 320 864
FLAG 416 512 0
FLAG -256 384 0
FLAG 384 128 out
IOPIN 384 128 Out
FLAG -256 256 +in
FLAG 128 64 +V
FLAG 416 368 +V
FLAG 128 192 0
FLAG -256 192 0
FLAG -256 48 -in
FLAG 320 304 0
FLAG 384 736 out2
IOPIN 384 736 Out
FLAG 128 672 +V
FLAG 128 800 0
FLAG 320 912 0
FLAG -144 576 +in
FLAG -144 752 -in
SYMBOL voltage 416 384 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL opamp2 128 64 R0
SYMATTR InstName U1
SYMATTR Value LM324
SYMBOL voltage -256 272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(1 1 50)
SYMBOL voltage -256 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 0.5
SYMBOL Misc\\EuropeanResistor 304 160 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor -144 272 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 48 272 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL Misc\\EuropeanResistor 304 768 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor -112 592 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 64 592 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 100k
SYMBOL opamp2i 128 672 R0
SYMATTR InstName U2
SYMATTR Value LM324
TEXT -288 -144 Left 2 !.tran 0 40m 0 1u
TEXT 256 48 Left 2 ;Universal Symbol \n"opamp2" used
TEXT -288 -496 Left 2 ;LM324 model from TI\nThe LM324 is used with the universal symbol "opamp2" \nfrom the standard LTSPICE [Opamps] menue. Simply\nplace this symbol "opamp2" on the schematic. Then replace\nthe text "opamp2" with  LM324. Don't forget to \nset the model path with a Spiceline\n.include LM324.5_1\nCopy the model fle in the same directory where this schematic is saved.\nI made a new symbol opamp2i with swapped input pins.\nCopy the symbol file opamp2i.asy in the folder of your schematic.
TEXT -288 -112 Left 2 !.options plotwinsize=0
TEXT -288 -184 Left 2 !.include LM324.5_1
TEXT 240 656 Left 2 ;Universal Symbol \n"opamp2i" used
TEXT -192 -32 Left 4 ;COMPARATOR CIRCUIT
TEXT -200 488 Left 4 ;COMPARATOR CIRCUIT