On Feb 17, 9:35 am, Tristan Mumford <xtristan.xmumf...@xgmail.xcom> wrote: > You vastly overestimate me and my components. I quote from the IC "DM7414N" Sure it's a schottky at least. Nope. The schottkys were the 74S, 74LS and 74ALSs families, first there was the 74, then came the 74S, 74LS, 74ALS, 74H, 74HC, 74HCT, and somewhere in-between appeared the 74Fs too, IIRC. Jorge.