Members Electric-Diaries Posted June 23, 2013 Members Share Posted June 23, 2013 Hey guys this is my first time posting so I hope I am in the right place.I am looking for some help/ideas on how to achieve a modification.I am wanting to add a momentary on/off button to my BOSS DD-7. Basically It would be a momentary switch that lets signal through to the delay circuit when you hold it down, but would return to dry or off when released. It is important though that the tail of whatever has been momentarily "let through" to the delay circuit does not get cut off when the button is released.This sounds quite simple in theory but I can't seem to think of the solution at the moment. Also since my experience is in analog technology, I don't really understand the digital circuits too well. I thought about shorting out one end of the "E.LEVEL" pot and having it unshort when the button is momentarily released. The effect of this is that the E.LEVEL stays at 0 in default but then jumps to whereever the pot is set when the button is held. The problem is that once you release the button the effect gets shut off completely without leaving the tail.When you turn the effect off normally (via the foot switch) it still let's the tail drag out. However since this appears to be a momentary switch going to a chip (probably with some sort of relay style circuit inside it) I am unsure of how to make this momentary.I have searched the internet but all that I can see is suggestions of buying 3rd part external devices. If anyone has any ideas I would love to hear them. Here are some schematics that I pieced together too.Thanks a lot!!! - Benjamin(here are some links to the schematic)ANALOG schematic http://2imgs.com/38e694be6dDIGITAL schematic http://2imgs.com/1ac4b69c4f Link to comment Share on other sites More sharing options...
Members Electric-Diaries Posted June 24, 2013 Author Members Share Posted June 24, 2013 Ok I did some experimenting and it seemed to work when I cut the circuit leading into the buffer that feeds the DA.Basically it's just a matter of inserting a momentary switch between TP2 and C8 (upper left corner of the Analog schematic). Of course it needs to be done on the other side too so a dual pole switch is needed. If any body is interested in more information (or more suggestions) then let me know! Link to comment Share on other sites More sharing options...
Members Kazinator Posted June 24, 2013 Members Share Posted June 24, 2013 I haven't looked at the schematic in detail.Are you saying that the required behavior of delaying the bypass while the tail end of the signal plays through is already implemented in the DD-7, so that all you need is the momentary switch hardware? Link to comment Share on other sites More sharing options...
Members eephus Posted January 8, 2015 Members Share Posted January 8, 2015 Hey, I'd love details on how you modded the DD-7. Unlike you, I don't care about trails. Just want a momentary on/off, so it's only on when I have the switch held down. Thanks! Link to comment Share on other sites More sharing options...
Members WRGKMC Posted January 8, 2015 Members Share Posted January 8, 2015 Hey' date=' I'd love details on how you modded the DD-7. Unlike you, I don't care about trails. Just want a momentary on/off, so it's only on when I have the switch held down. Thanks![/quote'] You can build a loop switch which bypasses the pedals but instead of using an on/off DPDT switch, you use a momentary DPDT switch. The first diagram here shows you how its wired. http://www.beavisaudio.com/techpages/PedalHacker/ Then you just use one of these switches http://www.amazon.com/250V-120V-Momentary-Button-Switch/dp/B0076UHNWK/ref=sr_1_12?ie=UTF8&qid=1420721004&sr=8-12&keywords=dpdt+switch+momentary Link to comment Share on other sites More sharing options...
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