I wonder if somebody can point me in the right direction with this.

I have an output from a custom designed and built rotation sensors (not
my design) that generates either +2v (rotating left), floating (no
rotation) or -2v (rotating right). There's no specs for this sensor but
a peek under the lid shows that the outputs are from some LM324 quad
op-amps. Originally, the outputs drove bi-colour LEDs.

I need to convert and split this into two TTL compatible logic signals.

One goes high when it detects the +2v, the other goes high when it
detects the -2v and both either go high or low (I don't mind which) when
the input floats.

Any suggestions welcome.
Joe.

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