15V 7400 logic family??

[John Speth]

At 12:00 AM 3/28/97 -0400, you wrote:
>John Speth wrote:
>> 
>> I'm designing a nice and simple 2 channel sequencer and, of course, I'd
>> like to make it small and easy to build.  
>
>If you make up some boards I'll buy some.
>
>gino

This design has started to solidify in my mind and on paper.  I've
carefully analyzed all the risk aspects of the circuit and I think I can
get a nice 10 chip design (or thereabouts).  I'm gonna use 5V 7400 HCT
logic with CD4051s and a couple of opamps.  The sequencer engine components
are nothing compared to the attachments needed (18 pots and LEDs, about 8
toggle switches, and a few jacks).  Here are the features I plan to have: 1
ch/16 stage or 2 ch/8 stage operation selectable, continuous loop/single
run triggered selectable, sequence resets with trigger, variable length
sequence selection, output level control, external/internal clock
selectable, and internal clock synced to trigger.

My goal is to design and build one for myself.  I'd be happy to share the
design when I get it finalized (I get sidetracked easily).  As for building
and selling, well, I prefer wirewrap construction, so if you don't mind
that and you make it worth my while, I can build 'em and sell 'em too.


John Speth (johns at oei.com)
Object Engineering, Inc.
Vancouver, WA