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electro samurai 30th March 2004 08:31 AM

logic gates and spst
i want to create effectors for my guitar.
i built a distortion circuit.
its sweet.
now i need a dpdt switch.
i cant get a pedal dpdt switch for several reasons, so i thought of something else.
a simple digital system that can use an spst bottun to a dpdt switch.
it has 4 modes
1. spdt closed. effect off.
2. spdt open. effect on
3. spdt closed. effect on.
4. spst open. effect off.

in other words, the spst is turns circuit on , and when pressed second time turns circuit off.

unfortunatly, my knowledge in logic gates, and electronics generally, is limited, so i couldn't find a circuit that can do this.
ive been schetching for a while now.

plz, HELP.

Stones 30th March 2004 03:43 PM

have a look at

D-type flip-flops for example 4013,

electro samurai 30th March 2004 06:47 PM

i got it!
2 Attachment(s)
check it out!
i think its works!
the 4016 replaces a real dpdt.
thx mark!
u an angel!

Stones 30th March 2004 07:07 PM

glad to help,

but again a hint. You may wish to hold the gates low or high with some resisters untill you close the switch.

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