>> I think Jameco only carries the SG3524. The LM3524 is an improved
>> version, the opamp inputs common-mode range is extended and allows
>> connecting to the output voltage and vref directly, not having to use a
>> voltage divider like the SG3524.

> so if I hook up a voltage divider to match the internal reference I
> should be ok, right?

Yes, divide the reference and the feedback and it should work fine.

I know I have a box of those Arnold cores somewhere, if I find them I'll
ask you for your address and send you a couple.

Cheers,

Bob

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