My first question is that it says u cn use ANy dual opamp..I have a jrc4558d..will this work without anychanges or adjustmnts? Or any ideal opamp?
second question= does it matter what type of led goes in it? It requires 2. Can these be 2 5mm red or 3 mm red?
OpAmp - as long as it's a dual one. Any kind is OK.
Led's - just make shure they are same. other than that - no difference.
Yes. Just to be clear. It is the original E-H Doctor Q circuit which was so fussy about op-amp (1458 only). The Dr Quack and Nurse Quacky use Jack Orman's fix that permits use of virtually any dual op-amp.