Rebote 2.5-Momentary switch for delay rate

[theundeadelvis]

I know this has been discussed a few times to some degree, but searching did not turn up the exact answer I am looking for. What I am curious about is if you can use a momentary switch to bridge lugs 2 and 3 of the delay pot. This would take it from whatever rate you have it set at to basically no delay, BUT what I am hoping to be able to do is make it happen somewhat slowly so it sounds like you are actually turning the knob and not just instantly. Any help is appreciated!

[Hambo]

Expression pedal?

Add a switched stereo jack so that the delay knob is off when a plug is in there and this runs to an expression pedal you can make out of a cheap plastic or old knackered wah etc.

I'm planning something like this with my rebote when I get it up and running, except I will be using the jack to attach a vanishing point sequencer circuit.

[alex frias]

But the idea of a momentary switch associated with a pot is not new and can mimic the effect you get mechanicaly when changing the delay on a Tape Echoplex machine.
It's stuning!

[slacker]

Take a look at R.G's LERA http://geofex.com/Article_Folders/lera/lera.htm that will do what you want. Just hook it up in parallel with the delay time pot.

[remmelt]

That's very interesting.

[theundeadelvis]

Thanks everybody for your suggestions. I steered away from the expression pedal because I wanted a small self contained unit. The LERA looks interesting, but might be more than I am willing to do with this particular pedal. I will have to think on it.

[Processaurus]

hi, with the PT chip the rebote uses, the delay changes time with the resistance to ground set with the delay time pot, so you want the momentary switch to interface with some circuitry that will slowly change that resistance.  I'm thinking you could have the momentary switch that connects V+ to a big cap to ground, to make a slowly rising voltage when you hold the switch down, hook that voltage up to gate of a JFET, set up as a sorta variable resistance.  Or you could buffer that voltage with a transistor follower, and make it shine an LED on an LDR.

Or go low tech and throw a big knob on there that you can fiddle with your foot.

[theundeadelvis]

Thanks Processaurus. That sounds like something worth trying!