[sdiy] Finding the correct IC...

simondu at desert.as simondu at desert.as
Wed Jun 19 19:27:19 CEST 2002

I don't know if I've understood your problem. What you can see in the file 
attached is a circuit that every time you push a button it changes the state to 
alternatively 0 to V+ on its output. 

On Wed, 19 Jun 2002 09:07:24 +0200 "Kristian Borgstedt" 
<kristian at borgstedt.com> wrote:
>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 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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