Noted. Might be a fun chip to come back to, but I’ll start with the LM324.
I’ve learned since posting this a lot about passive vs active differentiators.
I’m going to start with some passive solutions and then return here for an active one if required.
This is wild! I had a read of the OP amp Wikipedia article and I think it’s going to be one of those things I need to come back to after my theory has improved.