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Thread

Sequencing Programmer Question

2004-09-15 by Dean Batute

Hello All,
I too have a question regarding the Sequencing Programmer
that has been bugging me for a while now. What is the function of
the "Preset" input? Obviously the "Reset" input turns on "Stage 1",
but typically logic circuits that have a preset control ALSO have an
input to say "preset to what?". (I'm talking in regards to presetable
counters like the TTL 74lLS197 or the CMOS CD4018).

Any chance someone can shed some light on this elusive input jack?

Thanks....Dean.

Re: Sequencing Programmer Question

2004-09-15 by Peter Grenader

I've had my thoughts about that - not sure what's under the hood on those,
but Serge used a 4516 on this like the TBK, could this be a random enable,
in that it forces a second counter signal into the first 4516's PRESET
inputs?

Maybe a stretch.

- P

Anyone have a UAP schematic? I'm Serge repairing again and this is one O
don't have.

- P

Dean Batute wrote:

Show quoted textHide quoted text

> Hello All,
> I too have a question regarding the Sequencing Programmer
> that has been bugging me for a while now. What is the function of
> the "Preset" input? Obviously the "Reset" input turns on "Stage 1",
> but typically logic circuits that have a preset control ALSO have an
> input to say "preset to what?". (I'm talking in regards to presetable
> counters like the TTL 74lLS197 or the CMOS CD4018).
>
> Any chance someone can shed some light on this elusive input jack?
>
> Thanks....Dean.
>
>
>
>
> Keep on Patchin'!
>
> Yahoo! Groups Links
>
>
>
>
>

Re: Sequencing Programmer Question

2004-09-15 by James R. Coplin

The reset jack on the TKB and programmers work differently.

On the TKB, the sequence will step all the way to the end and automatically
wrap around to 1 (this assumes running forward and no connection to shorten
the sequence steps). If you press a keypad on the TKB, the sequencer jumps
to that point and that step becomes the first step. The sequence will
continue to run and wrap back to step one. If you pulse the reset, the
sequence will return to the first active step.

So, if things are running along 1..16,1..16, and you press the 5 button, you
get immediately 5..16,1..16,1..16, etc. 5 becomes the first active step. If
you pulse the reset, the sequence jumps back to 5..16,1..16, etc.

On the programmer, the preset jack does the same thing (returns to the first
active step). The reset jack jumps the sequence back to 1. So, if you press
2 on the programmer you get a running sequence of:

2,3,4,2,3,4,etc.

So, you could do the following...

2,3,4,2,3,4, (pulse reset) 1,2,3,4,2,3,4, (pulse reset) 1,2,3,4,2,3,(pulse
preset) 2, 3, (pulse preset) 2, 3, 4, 2, 3, 4...

Hopefully this clears this up!

James R. Coplin
***************
If anyone asks of my whereabouts,
simply tell them i've gone out the window
for a spot of tea and am not
expected back any time soon.
***************

Show quoted textHide quoted text

> -----Original Message-----
> From: Dean Batute [mailto:phix_it@...]
> Sent: Wednesday, September 15, 2004 8:53 AM
> To: SergeModular@yahoogroups.com
> Subject: [SergeModular] Sequencing Programmer Question
>
> Hello All,
> I too have a question regarding the Sequencing Programmer
> that has been bugging me for a while now. What is the function of
> the "Preset" input? Obviously the "Reset" input turns on "Stage 1",
> but typically logic circuits that have a preset control ALSO have an
> input to say "preset to what?". (I'm talking in regards to presetable
> counters like the TTL 74lLS197 or the CMOS CD4018).
>
> Any chance someone can shed some light on this elusive input jack?
>
> Thanks....Dean.
>
>
>
>
> Keep on Patchin'!
>
> Yahoo! Groups Links
>
>
>
>
>

Re: Sequencing Programmer Question

2004-09-15 by Dean Batute

Hello James ....(and all)..THANK YOU James for FINALLY clearing up a
question that till now, nobody else would help me with. Now I have an
understanding as to what Serge was up to ! The last button pressed
becomes the "Preset Address" and this address is loaded whenever
the "Preset" input jack is pulsed high !!!

There you have it boys and girls :)

Cheers....Dean.

--- In SergeModular@yahoogroups.com, "James R. Coplin" <moog@q...>
wrote:

Show quoted textHide quoted text

> The reset jack on the TKB and programmers work differently.
>
> On the TKB, the sequence will step all the way to the end and

automatically

> wrap around to 1 (this assumes running forward and no connection to

shorten

> the sequence steps). If you press a keypad on the TKB, the

sequencer jumps

> to that point and that step becomes the first step. The sequence

will

> continue to run and wrap back to step one. If you pulse the reset,

the

> sequence will return to the first active step.
>
> So, if things are running along 1..16,1..16, and you press the 5

button, you

> get immediately 5..16,1..16,1..16, etc. 5 becomes the first active

step. If

> you pulse the reset, the sequence jumps back to 5..16,1..16, etc.
>
> On the programmer, the preset jack does the same thing (returns to

the first

> active step). The reset jack jumps the sequence back to 1. So, if

you press

> 2 on the programmer you get a running sequence of:
>
> 2,3,4,2,3,4,etc.
>
> So, you could do the following...
>
> 2,3,4,2,3,4, (pulse reset) 1,2,3,4,2,3,4, (pulse reset) 1,2,3,4,2,3,

(pulse

> preset) 2, 3, (pulse preset) 2, 3, 4, 2, 3, 4...
>
> Hopefully this clears this up!
>
> James R. Coplin
> ***************
> If anyone asks of my whereabouts,
> simply tell them i've gone out the window
> for a spot of tea and am not
> expected back any time soon.
> ***************
> > -----Original Message-----
> > From: Dean Batute [mailto:phix_it@y...]
> > Sent: Wednesday, September 15, 2004 8:53 AM
> > To: SergeModular@yahoogroups.com
> > Subject: [SergeModular] Sequencing Programmer Question
> >
> > Hello All,
> > I too have a question regarding the Sequencing Programmer
> > that has been bugging me for a while now. What is the function of
> > the "Preset" input? Obviously the "Reset" input turns on "Stage

1",

> > but typically logic circuits that have a preset control ALSO have

> > input to say "preset to what?". (I'm talking in regards to

presetable

> > counters like the TTL 74lLS197 or the CMOS CD4018).
> >
> > Any chance someone can shed some light on this elusive input

jack?

> >
> > Thanks....Dean.
> >
> >
> >
> >
> > Keep on Patchin'!
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >