[sdiy] Dual comparator with a twist

[Peter Grenader]

I come up with a lot of dogs, but when something happens across my bench
that's interesting I try to pass it on.

I've done up what I call an event timer that consists of two independent
single level threshold comparators that can, with a switch, be linked
together in a comb so that so the two are forced to extrapolate cascading
manually adjusted threshold levels from a single input.  Kind of
interesting.

Go here for an explanation, schematic, photo and audio sample or two:

http://www.buzzclick-music.com/event_timer_info.html

I don't know if this has ever been done before.  I'm a big fan of
comparators for making automated logic decisions and found this stacking
option to be 'way' useful.

- P