[sdiy] Sequencer Engine...WORKING!

[Peter Grenader]

This is GREAT!

I've got a fully functional 8 X 3 sequencer engine working.  You have no
idea how exihilarating this is for a hack hobbiest who really has no idea
what design is all about!

One quaery for the group is: since the heart of this design is all boolean,
there was no need to supply negative voltages. THe trigger inputs are
turning on NPNs which lead to the CMOS logic.  Will I need to bother with
diodes to protect against negative voltges at the inputs if I use an AC
waves into any of these trigger inputs?

The logic is working.  All to do now is wire up the pots, sun the outs and
create the step trigger outputs.  it's operational conventions are:

counting modes:

1) up
2) down
3) up then down (pend.)
4) quasi-random

In modes 1 and 2 above it can be formatted as:

1) 3 banks of 8
2) one bank of 16 and one bank of 8
3) one bank of 24

Trigger inputs for:

Clock in
Hold 
Reset
Forward/Backwards
Random enable

controls:

stage/bank voltages pots (24)
output levelpots  per bank (3)
output trigger switches for each step (along with seperate pulse out jacks)

I am not positive how random my random is, as I am judging this only  by
monitoring LED activity at this point.  It looks good however, but I had to
bump up the internal clock driving the random binary from 11 to 60 Khz.  Of
course, I'll have to wait until I hear it to be 'for sure sure"

Anyway, I got past (what I considered to be) the hard part.  It's MILLER
TIME!