Good , he may think of interesting circuits with the Schmitt triggers, like a fast edge pulse generator very useful , or may a period of looking into useful I.C's stretch himself a bit. I often look up an IC to see what it does, and the circuits that go with it for my uses of test equipment , and of course our Amateur Radio, talking of which Sean, PIC programing , in Radio com last year, the was a project of an SWR analyser, which Pic based. so that going to be my winter evenings taken care of. How are you with the Ham Radio now.
Paul