I have just noticed, RS are now selling my chosen PIC16LF1709, for around 30p each, even for low volumes. Wow, for a device with Op Amps, ADC, DAC, PWMs and much more. That’s another reason I like PICs.
Meanwhile, progress continues. Nothing much to demonstrate but I have accurate timer code (+/-10ppm) working, based on a 32.768kHz watch crystal.
@Weaver (+others?), I feel I should warn in advance... If I get as far as building a real device, I might as well build a dozen or so, that’s how parts pricing works these days. So, I might be on the scrounge for folks at the other extremities of the country, to try it out for me, and report back.
Feel free to start thinking of reasons to decline, but your payment would be retained ownership of a gadget that you probably do not already own.