strange that you should mention the ASR because when i woke up this morning it came to me that this might be a way to get that "set, reset" thing going on. But i didn't know how to go about it even though i spent some time working on it in my head. I won't have time to get to the machine till next wee 'cause of daughters school activities this weekend.But it would seem to me the ASR approach would be the simplest. Along these same lines, instead of , or along with useing Row A and Row B to double the length of the sequencer, how about running two in serial? Last stage "gate out" of first Seq starts the second sequencer. But how to "hold" the first while the second runs, and then "reset" and "hold"the second while the first one is "reset" and started again. I'v been thinking on this for months and haven't been able to execute the procedure. Anyone?
kind regards
john duval
-------------- Original message --------------
Here's how you make a toggle flip-flop. You just need an ASR and an
inverter.
toggle signal -> ASR pulse in
ASR output 2 -> inverter in
inverter out -> ASR sample in
Then any ASR output is your toggled output. (They alternate parity.)
However, as I posted before, you don't need a flip-flop in the first
place to turn a SEQ8 into a SEQ16!
The cool thing about this toggle flip-flop is that you can chain
multiple ones together to make a binary counter. With a dual ASR and a
BLOG, you can make a two-bit counter, and use it to turn, say, a
7-stage programmer into a 28-stage sequencer. However, it seems you
would also need three ACPRs - one to select A/B, one for C/D, and one
for (A/B) / (C/D). Or is there some other way to select cv signals?
Also, to make a conventional set-reset flip-flop, the module you really
want is the dual Schmitt trigger. Maybe there's some clever way to do
it without one, though, I don't know.
- Bob
--- In SergeModular@yahoogroups.com, "James R. Coplin"
wrote:
> The bigger question in your mind is probably, "Why do I want a couple
of
> NAND gates anyhow?" The reason is that you can construct a flip-flop
from 2
> NAND gates. By feeding the outputs of the NAND gates into the input
of each
> other, a basic memory module is created. In particular I would like
to make
> a toggle flip-flop. This is a flip flop that when pulsed outputs a
constant
> voltage (high or low, 1 or 0) until it is pulsed again. If the steady
state
> is high then pulsing it makes it low. The usefulness is that it
*stays* high
> or low until pulsed again. If I can't figure out how to wire one of
these
> up, I'll have to get out the soldering iron and make a bunch of these
as I'm
> constantly wanting one for complex sequencer work!
---------------------------------------------
Robert A. Hearn
rah@...
http://www.swiss.ai.mit.edu/~bob/
Keep on Patchin'!