[sdiy] Finding the correct IC...

John L Marshall john.l.marshall at gte.net
Wed Jun 19 15:22:29 CEST 2002


There is a common logic element called a flip-flop that will do exactly as
you require. Any flip-flop with a clock input and a Q output will do.

Take care,
John


----- Original Message -----
From: "Kristian Borgstedt" <kristian at borgstedt.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, June 19, 2002 12:07 AM
Subject: [sdiy] Finding the correct IC...


> Hello All,
>
> Havent been on the list for a couple of years, so short introduction
before
> I start:
> Kristian Borgstedt was the name, lives in Stockholm Sweden, makes music
with
> synthesizers, and also in the recent years build and fix musical gear. I
am
> also the webmaster of http://www.SynthDIY.com which is as the name says a
> site for DIY stuff though not only for synths... It is a bit complex and I
> am a technician not a designer, so it can be hard to find stuff... :)
>
>
> Anyway onto the problem:
> I am in the process of building a gate-sequencer, however I do not wish to
> use those switches with a pin sticking out of the board, I want to use a
> pushbutton-type switch. The problem I have is that I havent found a
suitable
> one that is on/off, the buttons I have found are those that is on when
> pressed, off when not pressed. There is a circuit called Latch (D-type,
S/R,
> ...) that according to a friend can help me with this problem, as it
> triggers on a pulse and stays High/low until it is Reset (Set/Reset).
> However all the S/R-Latches I have found need ONE pin for SET and ONE pin
> for RESET, which equals two... I want ONE pin to do BOTH... does anyone
know
> of a circuit that can do this for me? Maybe I read the circuit diagrams
> wrong I don't know, I am kind of stuck at the moment though....
>
>
> Thanks in advance,
>
>
> /Kristian
>
> .-----------. .------------------------------------------------------.
> |. _____   .| | Kristian Borgstedt                                   |
> | /   ./ /  | | 08-4536391                                           |
> |     / /   | | 0709-108211                                          |
> | "  / /  " | | "There was an eight son of an eight son, and there   |
> |   / /.    | | it should have ended. However (for reasons we better |
> |  / /____/ | | not get into he had seven sons, and then he had an   |
> |.         .| | eight son, a wizard squared... a source of magic,    |
> .-----------. | ...a Sourcerer." (Terry Pratchett)                   |
>               .------------------------------------------------------.
>
>




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