[sdiy] Finding the correct IC...
Grant Richter
grichter at asapnet.net
Wed Jun 19 19:20:38 CEST 2002
One thing to know is the notation for switches. A common method is to use
parentheses to denote a momentary contact.
Like so,
Off-On
indicates the switch is sustained on until the next button push, while
Off-(On)
indicates a momentary contact, the switch goes off again when the button is
released.
> 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....
>
>
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