»DOD bypass switchs from Mark Hammer's site

[difedetry]

I need a brief explanation about how it should be wired
to achieve a normal function of bypassing. Would be nice
someone help 'cause I'm not pretty sure how to make it...

Thanks everyone!

regards  

» Diego

[difedetry]

no one?

please...

»Diego

[rx5]

Hi mate,

visit Marcos munkey's site.... get my FEt bypass modds there... Havent tried this out yet cuz I cant seem to get those CD4007's...

hope this helps.......


-Ralph

[Mark Hammer]

I got you into this mess so I better get you out of it.

A standard DPDT stompswitch wired up in the traditional way provides two sets of contacts, each with their own "common".  Each common goes to a different jack, and hitting the switch routes the common to either the straight wire connecting the input and output or else the circuit board.

The common is mimicked on the circuit shown by tieing B and C together.  What you see in the diagram shows the makings of a SPDT switch.  If you duplicate the FET/caps/resistors/diode portion and connect them to X and Y, you produce another potential SPDT set of contacts that acts the same way at the same time.  Connect one of these "commons" to your input jack and another to the output jack, and that, in principle, should do it.

Please note, though, that this is typically NOT how DOD, BOSS and others use it.

More often, they have an input buffer and output buffer that always remain "on" and in circuit.  What they use for switching is essentially a SPDT arrangement like that shown, to connect the input buffer to the output buffer directly and cancel the effect path, or lift the input-to-output connection and tie the effect directly to the output buffer.

[difedetry]

Hi Ralph,

I've already checked your mods a while ago in a thread where
you recommend me your schematic... actually I'm designing
a pcb for it.
I just wanna know how to exactly wire this schematic (Mark
Hammer's site) because I already have the most parts of it
from other projects
When I've done with the layout design of your scheme I'll
contact you...

Thanks, pal!!

-------------

Hello Mark,

I REALLY appreciate your explanation because I'm not very handy with this things yet... I supposed that was SPDT, like an A/B box but I couldn't make out how to use those points X and Y...something was missing to my weak understanding/knowledge.

I made this layout for it:
http://www.difedetry-fx.com.ar/iframes/switch2.htm
so could I just add an input and output buffer to make that PCB layout usable...? and to turn it into something like the BOSS switching? Looking schemes from BOSS or the split one that Ralph has done it seems to be not much difficult, I think.

Thanks you very much for get me out of this mess and for take your time to teach a dummies like I, you're great  


regards  :wink:


» Diego