How can I build a SR flip flop using op amps? (for a hand made 555 timer) Transistors may be used. I was thinking of using a hysteric op-amp and putting a schmitt trigger on the input of comparator 2. However, my solution fails in simulation. Here's my current circuit.

It works with the LTSpice model of a SR Flip-Flop so I know everything else is working as desired.

 

Why do you need more than two op amps?

(that is not a question, it is a hint)

 

Here is a 1-opamp flipflop. Pulling either the set or reset inputs up to 12 V will cause action. Alternatively, you can ignore either input and use the other one for both set and reset. for example, pulling set up to 12 V sets the output to near 12 V, and pulling the set input down to GND sets the output near GND

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